Performance information

• Unsaturated hydraulic properties of recycled concrete aggregates blended with autoclaved aerated concrete grains for unbound road base materials in Vietnam
  Van Nam Pham; Tien Dung Nguyen; Hoang Giang Nguyen; Ken Kawamoto
  Journal of Material Cycles and Waste Management, Volume：27, Number：2, First page：712, Last page：728, Dec. 2024, [Reviewed], [Last]
  Abstract
  
  Understanding of hydraulic properties is necessary to evaluate the water infiltration and balance in a road course. An easily available hydraulic model can contribute to the design of urban flooding countermeasures and mitigation of urban heat islands by covering roads with pavements. Many studies have evaluated saturated hydraulic conductivity, but few studies of measurements and modeling of unsaturated hydraulic properties such as water retention and unsaturated hydraulic conductivity for roadbase materials have been done. Therefore, this study measured the unsaturated hydraulic properties of typical roadbase materials of recycled concrete aggregates (RCA) using an evaporation method in the laboratory. To improve the water retention capacity, RCA blended with autoclaved aerated concrete (AAC) grains were also used. The results showed that the Gardner–Campbell (GC) model described the hydraulic properties of tested roadbed materials well, and the inclusion of AAC grains increased the water-holding capacity effectively. As a case study, the GC model was incorporated into the Green–Ampt infiltration model to simulate the change in the infiltration rate over time. The simulated results analyzed the water infiltration characteristics well, and this approach would be a good tool to make a quick assessment of the infiltration process of roadbed materials.
  Springer Science and Business Media LLC, English, Scientific journal
  DOI：https://doi.org/10.1007/s10163-024-02134-y
  DOI ID：10.1007/s10163-024-02134-y, ISSN：1438-4957, eISSN：1611-8227, 共同研究・競争的資金等ID：44511245
• Current condition of solid waste management and JICA support in Sri Lanka　　　　　　　　　　　　　　　
  Sato, N.; T. Kondo; M.H. Cherki; M. Kalyanasundaram; K. Kawamoto
  Global Environmental Research, Volume：28, Number：4, First page：53, Last page：61, Dec. 2024, [Reviewed], [Last]
  English, Scientific journal
• Evaluating the thermal performance of permeable pavements: A case study in an urban Area of Vietnam　　　　　　　　　　　　　　　
  Ngo, K.T.; K. Kawamoto; M. Takata; M. Suzuki; Y. Tanaka; Q.M. Phan; H.G. Nguyen; T.D. Nguyen
  Global Environmental Research, Volume：28, Number：4, First page：45, Last page：52, Dec. 2024, [Reviewed]
  English, Scientific journal
• Diffusive and convective transport properties and pore-network characteristics of recycled, compacted concrete aggregates for use as road pavement materials　　　　　　　　　　　　　　　
  Hong Nam Thai; Ken Kawamoto; Hoang Giang Nguyen; Toshiko Komatsu; Per Moldrup
  Construction and Building Materials, Volume：457, First page：139460, Last page：139460, Dec. 2024, [Reviewed]
  Elsevier BV, English, Scientific journal
  DOI：https://doi.org/10.1016/j.conbuildmat.2024.139460
  DOI ID：10.1016/j.conbuildmat.2024.139460, ISSN：0950-0618, 共同研究・競争的資金等ID：44511245
• Thermal conductivity and volumetric heat capacity of air-dried granulated bentonite mixtures (GBMs) under different packing conditions　　　　　　　　　　　　　　　
  Nazir, M.; K. Nakamura; A. Matsuno; T. Sakaki; K. Kawamoto
  International Journal of GEOMATE, Volume：27, Number：122, Oct. 2024, [Reviewed], [Corresponding]
  International Journal of Geomate, English, Scientific journal
  DOI：https://doi.org/10.21660/2024.122.4577
  DOI ID：10.21660/2024.122.4577, ISSN：2186-2982, eISSN：2186-2990
• Flexural behavior of reinforced concrete beams using synthetic aggregates produced from concrete waste powder in Vietnam　　　　　　　　　　　　　　　
  Tran, V.C.; N.T. Nguyen; K. Kawamoto; H.G. Nguyen
  International Journal of GEOMATE, Volume：27, Number：120, Aug. 2024, [Reviewed], [Last]
  International Journal of Geomate, English, Scientific journal
  DOI：https://doi.org/10.21660/2024.120.4494
  DOI ID：10.21660/2024.120.4494, ISSN：2186-2982, eISSN：2186-2990
• An empirical study of the behavior of recycled aggregate concrete beams from CDW in Hanoi, Vietnam　　　　　　　　　　　　　　　
  Nghiem, H.T.; V.T. Tran; N.T. Nguyen; Q.M. Phan; T.D. Nguyen; K. Kawamoto; H.G. Nguyen
  International Journal of GEOMATE, Volume：26, Number：118, Jun. 2024, [Reviewed]
  International Journal of Geomate, English, Scientific journal
  DOI：https://doi.org/10.21660/2024.118.g12300
  DOI ID：10.21660/2024.118.g12300, ISSN：2186-2982, eISSN：2186-2990, 共同研究・競争的資金等ID：44511245
• Mechanical, hydraulic, and particle breakage properties of recycled concrete aggregates blended with autoclaved aerated concrete (AAC) grains for unbound road base and subbase materials in Vietnam
  Van Nam Pham; Tien Dung Nguyen; Hoang Giang Nguyen; Ken Kawamoto
  Journal of Material Cycles and Waste Management, Volume：26, Number：2, First page：845, Last page：859, Dec. 2023, [Reviewed], [Last]
  Springer Science and Business Media LLC, English, Scientific journal
  DOI：https://doi.org/10.1007/s10163-023-01858-7
  DOI ID：10.1007/s10163-023-01858-7, ISSN：1438-4957, eISSN：1611-8227, 共同研究・競争的資金等ID：44511245
• Compaction-induced variability in the 80/20 sand-bentonite mixture: Spatial variation in dry density at different scales in the laboratory and large-scale gas seal test　　　　　　　　　　　　　　　
  Toshihiro Sakaki; Keisuke Sakabayashi; Ken Kawamoto; Thomas Spillmann
  Applied Clay Science, Volume：246, First page：107146, Last page：107146, Dec. 2023, [Reviewed]
  Elsevier BV, English, Scientific journal
  DOI：https://doi.org/10.1016/j.clay.2023.107146
  DOI ID：10.1016/j.clay.2023.107146, ISSN：0169-1317
• Material and monetary flows of construction and demolition waste and assessment on physical and environmental properties of illegally dumped construction and demolition waste in Hanoi
  Lan Huong Nguyen; Thi Viet Nga Tran; Minh Giang Hoang; Hoang Giang Nguyen; Ton Kien Tong; Yugo Isobe; Mikio Kawasaki; Tomonori Ishigaki; Ken Kawamoto
  Environmental Science and Pollution Research, Volume：30, Number：60, First page：125965, Last page：125976, Nov. 2023, [Reviewed], [Last]
  Springer Science and Business Media LLC, English, Scientific journal
  DOI：https://doi.org/10.1007/s11356-023-30978-8
  DOI ID：10.1007/s11356-023-30978-8, eISSN：1614-7499, 共同研究・競争的資金等ID：44511245
• Autoclaved aerated concrete grains as alternative absorbent and filter media for phosphorus recovery from municipal wastewater: A case study in Hanoi, Vietnam　　　　　　　　　　　　　　　
  Hoai Son Tran; Nga Tran Thi Viet; Thu Hang Duong; Lan Huong Nguyen; Ken Kawamoto
  Environmental Technology & Innovation, Volume：31, First page：103175, Last page：103175, Aug. 2023, [Reviewed], [Last]
  Elsevier BV, English, Scientific journal
  DOI：https://doi.org/10.1016/j.eti.2023.103175
  DOI ID：10.1016/j.eti.2023.103175, ISSN：2352-1864, 共同研究・競争的資金等ID：44511245
• Mechanical properties of synthetic aggregate pelletized by waste concrete fines in Vietnam
  Tran Viet Cuong; Ken Kawamoto; Tran Thi Viet Nga; Nguyen Hoang Giang
  Journal of Science and Technology in Civil Engineering (STCE) - HUCE, Volume：17, Number：2, First page：1, Last page：8, Jun. 2023, [Reviewed]
  Due to rapid industrialization and economic growth, the generation of construction and demolition waste (CDW) from the activities of demolishing buildings is increasing in Vietnam. The Vietnamese Government has regulations on recycling and collecting CDW for reuse, recycling to environmental protection through Circular No. 08/2017/TT-BXD in 2017, and Directive 41/CT-TTg in 2020. Waste concrete fines (WCF) are generated during demolishing process or crushing of CDW materials. To save natural resources and increase the recycling rate, a disc pelleting technology has been used to recycle WCF. The pellet machine has a disk with 1.5m of diameter and 0.3m of depth; tilted at an angle of 55 degrees and the rotation speed from 15 to 22 rpm; the capacity is 0.5 to 0.8 tons per hour. This paper presents the results of pelletizing WCF research to produce synthetic aggregate (SA). The SA pelletized by WCF and cement had an apparent specific gravity of 2.45 – 2.55 g/cm3, a dry bulk specific gravity of 1.85 – 1.95 g/cm3, a crushing value of 19.2 – 29.9%, a LA (Los Angeles) value of 23 – 33% and water absorption around 13.2%. The mechanical properties of SA meet the requirement of TCVN 11969:2018, recycled aggregate type II for concrete.
  Hanoi University of Civil Engineering (HUCE), Vietnamese, Scientific journal
  DOI：https://doi.org/10.31814/stce.huce2023-17(2)-01
  DOI ID：10.31814/stce.huce2023-17(2)-01, ISSN：1859-2996, eISSN：2734-9489, 共同研究・競争的資金等ID：44511245
• Assessment of Dispersed Oil Sorption in Oily Wastewater onto Hydrophobized/Oleophilized Autoclaved Aerated Concrete (AAC) Grains
  Akihiro Matsuno; Ken Kawamoto
  Environments, Volume：10, Number：6, First page：92, Last page：92, May 2023, [Reviewed], [Last]
  The discharge of untreated oily wastewater into the environment has serious impacts on human health, living nature, and ecosystems and leads to significant economic losses. Many engineering techniques have been proposed and applied to treat oily wastewater, but limited studies have investigated low-cost and effective techniques using by-products and waste/scrap materials from the construction industry. Materials to treat oily wastewater are needed not only to mitigate environmental pollution but also to promote the reuse and recycling of industrial by-products, especially in developing countries. This study, therefore, examined the sorption capacity of dispersed oil in wastewater (dispersed soybean oil in water; initial oil concentrations, Ci = 10–1000 mg/L; oil droplet size in water <2 μm) onto the hydrophobized/oleophilized autoclaved porous aerated concrete (AAC) grains made from waste scrap in Vietnam by using batch sorption tests in the laboratory. The AAC grains (sizes 0.106–0.25, 0.25–0.85, and 0.85–2.00 mm) were hydrophobized/oleophilized using oleic and stearic acids (coating concentrations of 1.0, 5.0, and 10 g/kg), and two sands (0.18–2.00 and 0.30–2.00 mm) were used as control samples. The results showed that the hydrophobized/oleophilized AAC grains had high sorption capacity for dispersed oil (i.e., high oil removal efficiency) compared to the control sands. Especially, the removal of AAC grains coated with stearic acid was >80% in high oil concentration solutions (Ci = 100 and 1000 mg/L), indicating that the hydrophobized/oleophilized AAC grains have high potential as useful adsorbents to trap dispersed oil in oily wastewater. Moreover, adsorption isotherms were drawn to examine the sorption characteristics of dispersed oil onto AAC grains. For all tested samples, the sorption of dispersed oil increased linearly with increasing equilibrium concentration. The commonly used Langmuir model, on the other hand, did not capture the measured isotherms.
  MDPI AG, English, Scientific journal
  DOI：https://doi.org/10.3390/environments10060092
  DOI ID：10.3390/environments10060092, eISSN：2076-3298, 共同研究・競争的資金等ID：44511245
• Review on water and heat balance and challenges for the adoption of permeable pavement system in Vietnam　　　　　　　　　　　　　　　
  Pham, V.N.; K. Kawamoto; T.D. Nguyen; T.K. Tong; H.G. Nguyen
  International Journal of GEOMATE, Volume：24, Number：103, Mar. 2023, [Reviewed]
  International Journal of Geomate, English, Scientific journal
  DOI：https://doi.org/10.21660/2023.103.g12169
  DOI ID：10.21660/2023.103.g12169, ISSN：2186-2982, eISSN：2186-2990, 共同研究・競争的資金等ID：44511245
• Đánh giá khả năng xử lý Cadmi trong nước thải của bê tông khí chưng áp (AAC)
  Trần Hoài Sơn; Trần Thị Việt Nga; Ken Kawamoto
  Tạp chí Khoa học Công nghệ Xây dựng (KHCNXD) - ĐHXDHN, Volume：17, Number：1V, First page：1, Last page：10, Feb. 2023, [Reviewed], [Last]
  Bê tông khí chưng áp (AAC) là vật liệu rỗng xốp (độ rỗng tổng >70%), thành phần hóa học giàu canxi và các kim loại khác (Fe, Al, K, Mg). AAC cho thấy tiềm năng là chất hấp phụ hiệu quả các kim loại nặng (KLN) đặc biệt là Cadmi trong nước thải. Quá trình công nghiệp hóa trong ngành xây dựng và xu hướng giảm, không sử dụng các vật liệu nung truyền thống đã làm gia tăng quy mô sản xuất và sử dụng vật liệu AAC từ đó làm phát sinh hàng trăm nghìn mét khối AAC phế thải. Việc tái sử dụng chất thải AAC cho mục đích xử lý nước thải có ý nghĩa thực tiễn lớn khi giải quyết được bài toán quản lý chất thải rắn và xử lý KLN kiểm soát ô nhiễm môi trường nước. Trong nghiên cứu này, AAC đã được thử nghiệm như chất hấp phụ để loại bỏ Cd(II) ra khỏi nước thải. Các thí nghiệm hấp phụ tĩnh đã được thực hiện bằng cách sử dụng bê tông thải AAC với 2 kích cỡ khác nhau 3-5 mm và 5-10 mm để xử lý nước thải tổng hợp có nồng độ Cd(II) từ 0-5000 mg/L, trong các thời gian phản ứng khác nhau để đánh giá thời gian hấp phụ cân bằng và dung lượng hấp phụ cực đại của vật liệu. Kết quả nghiên cứu đã xác định được các thông số động học hấp phụ theo mô hình Langmuir và dung lượng hấp phụ Cd(II) của AAC lên đến 9,26 mg/g, từ đó chứng minh AAC có thể được sử dụng làm vật liệu hấp phụ chi phí thấp, hiệu quả, thân thiện, bền vững trong việc loại bỏ Cd(II) trong nước thải.
  Hanoi University of Civil Engineering (HUCE), Vietnamese, Scientific journal
  DOI：https://doi.org/10.31814/10.31814/stce.huce(nuce)2023-17(1v)-01
  DOI ID：10.31814/10.31814/stce.huce(nuce)2023-17(1v)-01, ISSN：2615-9058, eISSN：2734-9268, 共同研究・競争的資金等ID：44511245
• Applicability of Alkaline Waste and By-products as Low Cost Alternative Neutralizers for Acidic Soils
  Isiri Upeksha Nagasinghe; Takeshi Saito; Takato Takemura; Ken Kawamoto; Toshiko Komatsu; Naoki Watanabe; Yoshishige Kawabe
  ISIJ International, Volume：63, Number：2, First page：228, Last page：234, Feb. 2023, [Reviewed]
  Iron and Steel Institute of Japan, English, Scientific journal
  DOI：https://doi.org/10.2355/isijinternational.isijint-2022-247
  DOI ID：10.2355/isijinternational.isijint-2022-247, ISSN：0915-1559, eISSN：1347-5460
• Porosity and permeability of pervious concrete using construction and demolition waste in Vietnam　　　　　　　　　　　　　　　
  Tuan, K.N.; P.Q. Minh; K. Kawamoto; N.H. Giang; N.T. Dung
  International Journal of GEOMATE, Volume：24, Number：101, Jan. 2023, [Reviewed]
  International Journal of Geomate, English, Scientific journal
  DOI：https://doi.org/10.21660/2023.101.3511
  DOI ID：10.21660/2023.101.3511, ISSN：2186-2982, eISSN：2186-2990, 共同研究・競争的資金等ID：44511245
• Application of Autoclaved Aerated Concrete Grains Coated with Stearic Acid for Removal of Oil from Water
  Huyen T. T. Dang; Cuong Q. Le; Son H. Tran; Ken Kawamoto; Nga T. V. Tran; Pham Thanh Huyen
  Water, Air, & Soil Pollution, Volume：233, Number：12, Dec. 2022, [Reviewed]
  Springer Science and Business Media LLC, English, Scientific journal
  DOI：https://doi.org/10.1007/s11270-022-05941-x
  DOI ID：10.1007/s11270-022-05941-x, ISSN：0049-6979, eISSN：1573-2932, 共同研究・競争的資金等ID：44511245
• Gas transport parameters of differently compacted granulated bentonite mixtures (GBMs) under air-dried conditions　　　　　　　　　　　　　　　
  Mazhar Nazir; Ken Kawamoto; Toshihiro Sakaki; Toshiko Komatsu; Per Moldrup
  Soils and Foundations, Volume：62, Number：6, First page：101223, Last page：101223, Dec. 2022, [Reviewed]
  Elsevier BV, English, Scientific journal
  DOI：https://doi.org/10.1016/j.sandf.2022.101223
  DOI ID：10.1016/j.sandf.2022.101223, ISSN：0038-0806, 共同研究・競争的資金等ID：44511237
• Hydrophobicity/Oleophilicity of Autoclaved Aerated Concrete (AAC) Grains Coated with Oleic and Stearic Acids for Application as Oil/Water Separating Filtration and Adsorbent Materials in Vietnam
  Akihiro Matsuno; Ken Kawamoto
  Environments, Volume：9, Number：8, First page：101, Last page：101, Aug. 2022, [Reviewed], [Last]
  Separation of oil and water is an effective technique to treat oily wastewater. For examining the applicability of porous grains coated with hydrophobic agents (HA) as low-cost and easily available filtration and adsorbent materials in the separation of oil and water, this study assessed the hydrophobicity/oleophilicity of porous grains made from autoclaved aerated concrete scrap coated with low-cost and harmless hydrophobic agents such as oleic and stearic acids. Tests using a sessile droplet method showed unique relationships between the contact angles (CA) of water droplets in air (CAwa), oil droplets in water (CAow) and coated HA concentrations. The CAwa increased linearly with increasing HA concentration and then became almost constant and/or gently increased after a specific point, indicating that a minimum coating amount gives the maximum hydrophobicity to HA-coated porous grains exists. The CAow gradually decreased exponentially with increasing HA concentration. In particular, the CAow of porous grains coated with stearic acid decreased with increasing of HA concentration in a two-step process. Furthermore, analyses of the Pearson correlation showed that both CAwa and CAow correlated well with the specific surface area (SSA), implying that the SSA is a good indicator as a quick assessment of hydrophobicity/oleophilicity of HA-coated porous grains.
  MDPI AG, English, Scientific journal
  DOI：https://doi.org/10.3390/environments9080101
  DOI ID：10.3390/environments9080101, eISSN：2076-3298, 共同研究・競争的資金等ID：44511245
• Management Assessment and Future Projections of Construction and Demolition Waste Generation in Hai Phong City, Vietnam
  Kien Ton Tong; Ngoc Tan Nguyen; Giang Hoang Nguyen; Tomonori Ishigaki; Ken Kawamoto
  Sustainability, Volume：14, Number：15, First page：9628, Last page：9628, Aug. 2022, [Reviewed], [Last]
  Along with economic development, urbanization will generate a large amount of solid waste and put pressure on the waste management systems in developing countries. Face-to-face interview methods were used to investigate the current status of construction and demolition waste (CDW) management (collection, transportation, treatment, and storage) as well as reveal attitudes of governmental agencies and enterprises towards CDW recycling and recycled material products in Hai Phong City, Vietnam. Waste generation rates (WGRs) of the works were also determined by site surveys and as-built drawings method of typical old buildings to be demolished and two licensed new construction works. WGRs of 34.5 kg/m2 and 758 kg/m2 were identified during the construction and demolition of small private houses, respectively, while WGRs at public house demolition sites were 1053 kg/m2. To effectively manage the CDW, the gross floor area of new construction work was estimated by a multiple regression equation with the population and gross region domestic product growth. Based on this model combining the investigation results, the amount of CDW increase in 5–30 years is also predicted. This data set will help management agencies plan storage yards as well as select the appropriate CDW treatment and recycling methods, contributing to building a sustainable and effective CDW management model for Hai Phong City as well as Vietnam in the future.
  MDPI AG, English, Scientific journal
  DOI：https://doi.org/10.3390/su14159628
  DOI ID：10.3390/su14159628, eISSN：2071-1050, 共同研究・競争的資金等ID：44511245
• Current state of building demolition and potential for selective dismantling in Vietnam　　　　　　　　　　　　　　　
  Ngoc Han Hoang; Tomonori Ishigaki; Takuma Watari; Masato Yamada; Ken Kawamoto
  Waste Management, Volume：149, First page：218, Last page：227, Jul. 2022, [Reviewed], [Last]
  Elsevier BV, English, Scientific journal
  DOI：https://doi.org/10.1016/j.wasman.2022.06.007
  DOI ID：10.1016/j.wasman.2022.06.007, ISSN：0956-053X, 共同研究・競争的資金等ID：44511245
• Laterite grains as a low-cost adsorbent to treat heavy metal-contaminated water: A review　　　　　　　　　　　　　　　
  Bandara, A.B.P.; K. Kawamoto
  International Journal of GEOMATE, Volume：22, Number：94, Jun. 2022, [Reviewed], [Last]
  International Journal of Geomate, English, Scientific journal
  DOI：https://doi.org/10.21660/2022.94.3228
  DOI ID：10.21660/2022.94.3228, ISSN：2186-2982, eISSN：2186-2990, 共同研究・競争的資金等ID：44511245
• Permanent Deformation and Breakage Response of Recycled Concrete Aggregates under Cyclic Loading Subject to Moisture Change
  Syed Kamran Hussain Shah; Taro Uchimura; Ken Kawamoto
  Sustainability, Volume：14, Number：9, First page：5427, Last page：5427, Apr. 2022, [Reviewed], [Last]
  Natural granular materials widely used in building and infrastructure development consume a considerable number of natural resources. To avoid depleting natural granular materials, recycled concrete aggregates (RCA) from construction and demolition waste are now commonly used as an alternative. The mechanical behavior of RCA used in road construction is highly influenced by field conditions such as traffic load and moisture variation. The particle breakage of RCA influences long-term pavement performance because it changes the RCA grading over time. However, the effect of moisture content (m.c.) on mechanical behavior and particle breakage during compaction and cyclic loading is often neglected. The aims of the study were to investigate the mechanism of permanent deformation development due to moisture change, the breakage response of RCA in this process, and the assessment of existing permanent deformation prediction model. The results showed that initial m.c. effectively controlled the deformation of RCA; the permanent axial strain (εpa) was enhanced, and the breakage of coarse fraction (19~9.5 mm) under cyclic loading was reduced at higher levels of m.c. Based on the experimental results, a modified model for predicting εpa was proposed, incorporating a deviation factor induced by m.c. The model fitted the experimental data well, suggesting that it is useful to have a quantitative estimation of εpa of RCA with different m.c. under cyclic loading.
  MDPI AG, English, Scientific journal
  DOI：https://doi.org/10.3390/su14095427
  DOI ID：10.3390/su14095427, eISSN：2071-1050, 共同研究・競争的資金等ID：44511245
• Mechanical and Hydraulic Properties of Recycled Concrete Aggregates Mixed with Clay Brick Aggregates and Particle Breakage Characteristics for Unbound Road Base and Subbase Materials in Vietnam
  Trong Lam Nguyen; Van Tuan Nguyen; Hoang Giang Nguyen; Akihiro Matsuno; Hirofumi Sakanakura; Ken Kawamoto
  Sustainability, Volume：14, Number：8, First page：4854, Last page：4854, Apr. 2022, [Reviewed], [Last]
  The construction industry is one of the key industries with high potential for the circular economy; the promotion of reuse and recycling of construction and demolition waste (CDW) is essential for sustainable urban development. In this study, a series of compaction, California bearing ratio, saturated hydraulic conductivity, and particle breakage tests of well– and poor–graded mixtures of recycled clay brick aggregates (RCBs) and recycled concrete aggregates (RCAs) with maximum aggregate diameters of 19, 25, and 37.5 mm were carried out to examine the practical application of those mixtures to unbound roadbed materials in Vietnam. The experimental results suggest that the maximum amount of RCBs added to RCAs should be less than 30% when applied to unbound roadbed materials. In addition, it was found that the mixing proportions of RCBs and RCAs and the maximum aggregate diameter, gradation of aggregates, and initial moisture condition control the saturated hydraulic conductivity. Further, the particle breakage characteristics under compaction were carefully examined, and it was found that the percentage increment/decrement, as well as a newly introduced method of estimating the mixing proportions of RCAs and RCBs in the fine fraction (<2.36 mm), is effective in understanding the mechanism of particle breakage of RCA and RCB mixtures.
  MDPI AG, English, Scientific journal
  DOI：https://doi.org/10.3390/su14084854
  DOI ID：10.3390/su14084854, eISSN：2071-1050, 共同研究・競争的資金等ID：44511245
• Characterization of Physicochemical and Mechanical Properties of Dumped Municipal Solid Waste in Sri Lanka as Affected by the Climate Zone and Dumping Age
  Muhammad Rashid Iqbal; Abeywickrama Bamunusin Kankanamge Thilini Piumali; Nadeej Hansaraj Priyankara; Alagiyawanna Mohottalalage Nayana Alagiyawanna; Laksiri Chandana Kurukulasuriya; Ken Kawamoto
  Sustainability, Volume：14, Number：8, First page：4706, Last page：4706, Apr. 2022, [Reviewed], [Last]
  Due to the rapid increase in population and urbanization, municipal solid waste (MSW) generation is increasing. Sri Lanka, in particular, faces serious difficulties in finding new sites for MSW disposal, due to the lack of available space; therefore, the rehabilitation of existing MSW dumping sites and the extension of their services are required to achieve sustainable urban development. To examine suitable rehabilitation techniques, it is essential to identify the physicochemical and mechanical properties of dumped MSW, fully considering climatic conditions, waste composition, and the time since the waste was dumped. In this study, therefore, the physicochemical and mechanical properties of dumped MSW were investigated; the dumped MSW was taken from existing MSW dumping sites in three climate zones in Sri Lanka, namely the Karadiyana site in the wet zone, Udapalatha in the intermediate zone, and Hambantota in the dry zone, and it was taken at different times after being dumped. The results showed that the waste composition and biodegradation of organic materials affected the physicochemical and mechanical properties of the dumped waste. The measured compaction parameters of the “old” sites at Udapalatha and Hambantota were higher compared to the “new” sites. Compaction parameters at the Karadiyana site, on the other hand, were low, at even >20 years since being dumped, probably due to the high amount of scarcely compacted materials. In direct shear tests, both strain hardening and softening of the waste samples were observed, depending on the difference in vertical stress. Based on the Pearson correlations among measured physicochemical and mechanical parameters, it was found that the loss on ignition (LOI) would be a good indicator to quickly assess the mechanical parameters of “new” and “old” waste materials, due to the small sensitivities to waste age and climate conditions in Sri Lanka. In particular, LOI correlated well to measured specific gravity and compaction properties, and the r2 values of correlations exceeded |0.80|.
  MDPI AG, English, Scientific journal
  DOI：https://doi.org/10.3390/su14084706
  DOI ID：10.3390/su14084706, eISSN：2071-1050, 共同研究・競争的資金等ID：44511249
• Experimental studies on behaviors of reinforced concrete column structures made of recycled aggregates under concentric loads
  Nguyen Thanh Quang; Tran Viet Cuong; Nguyen Ngoc Tan; Nghiem Ha Tan; Ken Kawamoto; Nguyen Hoang Giang
  Journal of Science and Technology in Civil Engineering (STCE) - HUCE, Apr. 2022, [Reviewed]
  The paper presents experimental results and structural analysis of reinforced concrete (RC) columns made of recycled aggregate concrete (RAC) and natural aggregate concrete (NAC) under concentric compressive load. The ratio of recycled aggregates in mixture (i.e, replacement ratio, r in %) was 0, 50, and 100% by mass, where r = 0% corresponding to NAC. The load and deformation curves including cracking load, ultimate load, crack width, and compressive strain of the tested columns, were analyzed to determine the effects of replacement ratio of recycled aggregate on the behaviors of square column structures. The results show that the increase of r reduced the load-carrying capacity of RC columns under the concentric compressive load. Horizontal and vertical cracks also were observed immediately for tested columns with high r. The effect of r of RAC on the mechanical behaviros, however, became relatively small and did not affect the behaviors of RAC columns, indicating that the RAC tested in this study was feasible for use in recycled concrete structures.
  Hanoi University of Civil Engineering (HUCE), English, Scientific journal
  DOI：https://doi.org/10.31814/stce.huce(nuce)2022-16(2)-01
  DOI ID：10.31814/stce.huce(nuce)2022-16(2)-01, ISSN：1859-2996, eISSN：2734-9489, 共同研究・競争的資金等ID：44511245
• Review on current situation of generation and management of coal ash in Vietnam　　　　　　　　　　　　　　　
  Tran, V.C.; K. Kawamoto; T.K. Tong; H.G. Nguyen
  International Journal of GEOMATE, Volume：22, Number：91, Mar. 2022, [Reviewed]
  International Journal of Geomate, English, Scientific journal
  DOI：https://doi.org/10.21660/2022.91.gxi316
  DOI ID：10.21660/2022.91.gxi316, ISSN：2186-2982, eISSN：2186-2990, 共同研究・競争的資金等ID：44511245
• Visualization of microstructure and measurement of mass transport parameters for granulated bentonite mixtures
  Mazhar Nazir; Akihiro Matsuno; Takeshi Saito; Ken Kawamoto; Toshihiro Sakaki
  Japanese Geotechnical Society Special Publication, Volume：9, Number：2, First page：26, Last page：30, Oct. 2021, [Reviewed]
  The Japanese Geotechnical Society, Scientific journal
  DOI：https://doi.org/10.3208/jgssp.v09.cpeg121
  DOI ID：10.3208/jgssp.v09.cpeg121, eISSN：2188-8027
• Characterization of hydrophobicity for artificially hydrophobized autoclave aerated concrete grains
  Zafar Muhammad Junaid; Akihiro Matsuno; Takeshi Saito; Huyen Thi-Thanh Dang; Pham Thanh Huyen; Ken Kawamoto
  Japanese Geotechnical Society Special Publication, Volume：9, Number：8, First page：398, Last page：402, Oct. 2021, [Reviewed]
  The Japanese Geotechnical Society, Scientific journal
  DOI：https://doi.org/10.3208/jgssp.v09.cpeg124
  DOI ID：10.3208/jgssp.v09.cpeg124, eISSN：2188-8027
• OIL/WATER SEPARATION TECHNIQUES USING HYDROPHOBIZED/OLEOPHILIZED GRAINS: A REVIEW OF RECENT STUDIES　　　　　　　　　　　　　　　
  Akihiro Matsuno; Zafar Muhammad Junaid; Takeshi Saito; Huyen Thi Thanh Dang; Pham Thanh Huyen; Tran Thi Viet Nga; Ken Kawamoto
  International Journal of GEOMATE, Volume：20, Number：81, First page：28, Last page：34, May 2021, [Reviewed], [Last]
  Scientific journal
  DOI：https://doi.org/10.21660/2021.81.6268
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85101586748&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85101586748&origin=inward
  DOI ID：10.21660/2021.81.6268, ISSN：2186-2982, SCOPUS ID：85101586748
• TEMPERATURE CHANGE AND CO₂ PRODUCTION AND CONSUMPTION IN THE VADOSE ZONE OF ARAKAWA LOWLAND　　　　　　　　　　　　　　　
  Takeshi SAITO; Ken KAWAMOTO; Toshiko KOMATSU
  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), Volume：77, Number：3, First page：72, Last page：82, 2021, [Reviewed]
  Japan Society of Civil Engineers, Scientific journal
  DOI：https://doi.org/10.2208/jscejer.77.3_72
  DOI ID：10.2208/jscejer.77.3_72, ISSN：2185-6648, eISSN：2185-6648, J-Global ID：202102274435914559
• Characterization and comparison of groundwater quality and redox conditions in the Arakawa Lowland and Musashino Upland, southern Kanto Plain of the Tokyo Metropolitan area, Japan　　　　　　　　　　　　　　　
  Takeshi Saito; Lorenzo Spadini; Hirotaka Saito; Jean M. F. Martins; Laurent Oxarango; Takato Takemura; Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Toshiko Komatsu
  SCIENCE OF THE TOTAL ENVIRONMENT, Volume：722, Jun. 2020, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.scitotenv.2020.137783
  DOI ID：10.1016/j.scitotenv.2020.137783, ISSN：0048-9697, eISSN：1879-1026, Web of Science ID：WOS:000535470700002
• ベトナムにおける建設廃棄物の適正管理と建廃リサイクル資材を活用した環境浄化およびインフラ整備技術の開発　　　　　　　　　　　　　　　
  川本 健
  Volume：31, Number：1, First page：44, Last page：50, 2020, [Reviewed], [Invited], [Lead, Corresponding]
  Japanese, Scientific journal
  共同研究・競争的資金等ID：44511245
• Examination of crushed laterite brick for removal of chromium and arsenic from wastewater　　　　　　　　　　　　　　　
  Arachchillage Buddhika Priyadarshani Bandara; Gajanayaka Mudalige Pradeep Kumara; Akihiro Matsuno; Takeshi Saito; Tran Thi Viet Nga; Ken Kawamoto
  International Journal of GEOMATE, Volume：19, Number：74, First page：22, Last page：30, 2020, [Reviewed], [Last]
  Scientific journal
  DOI：https://doi.org/10.21660/2020.74.9176
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85088111674&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85088111674&origin=inward
  DOI ID：10.21660/2020.74.9176, ISSN：2186-2982, SCOPUS ID：85088111674
• Evaluation of Autoclaved Aerated Concrete Fines for Removal of Cd(II) and Pb(II) from Wastewater　　　　　　　　　　　　　　　
  G. M. P. Kumara; Ken Kawamoto; Takeshi Saito; Shoichiro Hamamoto; Shingo Asamoto
  JOURNAL OF ENVIRONMENTAL ENGINEERING, Volume：145, Number：11, Nov. 2019, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1061/(ASCE)EE.1943-7870.0001597
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85071765777&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85071765777&origin=inward
  DOI ID：10.1061/(ASCE)EE.1943-7870.0001597, ISSN：0733-9372, eISSN：1943-7870, SCOPUS ID：85071765777, Web of Science ID：WOS:000486511200004
• Methane eruptions from landfill final cover soil during rainfall events in laboratory experiments　　　　　　　　　　　　　　　
  Satoshi Izumoto; Shoichiro Hamamoto; Ken Kawamoto; Masanao Nagamori; Taku Nishimura
  SOILS AND FOUNDATIONS, Volume：59, Number：4, First page：1052, Last page：1062, Aug. 2019, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.sandf.2019.05.002
  DOI ID：10.1016/j.sandf.2019.05.002, ISSN：0038-0806, Web of Science ID：WOS:000488957500020
• Linking pore network structure derived by microfocus X-ray CT to mass transport parameters in differently compacted loamy soils　　　　　　　　　　　　　　　
  Arjun Baniya; Ken Kawamoto; Shoichiro Hamamoto; Toshihiro Sakaki; Takeshi Saito; Karin Mueller; Per Moldrup; Toshiko Komatsu
  SOIL RESEARCH, Volume：57, Number：6, First page：642, Last page：656, 2019, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1071/SR18186
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85069515125&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85069515125&origin=inward
  DOI ID：10.1071/SR18186, ISSN：1838-675X, eISSN：1838-6768, SCOPUS ID：85069515125, Web of Science ID：WOS:000484546300012
• Saturation-dependent gas transport in sand packs: Experiments and theoretical applications　　　　　　　　　　　　　　　
  Behzad Ghanbarian; Shoichiro Hamamoto; Ken Kawamoto; Toshihiro Sakaki; Per Moldrup; Taku Nishimura; Toshiko Komatsu
  ADVANCES IN WATER RESOURCES, Volume：122, First page：139, Last page：147, Dec. 2018, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.advwatres.2018.10.011
  DOI ID：10.1016/j.advwatres.2018.10.011, ISSN：0309-1708, eISSN：1872-9657, Web of Science ID：WOS:000450094200011
• Evaluation of applicability of filling materials in permeable reactive barrier (PRB) system to remediate groundwater contaminated with Cd and Pb at open solid waste dump sites　　　　　　　　　　　　　　　
  Udayagee Kumarasinghe; Ken Kawamoto; T. Saito; Y. Sakamoto; M. I.M. Mowjood
  Process Safety and Environmental Protection, Volume：120, First page：118, Last page：127, Nov. 2018, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.psep.2018.09.003
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85053428787&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85053428787&origin=inward
  DOI ID：10.1016/j.psep.2018.09.003, ISSN：0957-5820, SCOPUS ID：85053428787, 共同研究・競争的資金等ID：44511249
• Monitoring of methane emission from a landfill site in daily and hourly time scales using an automated gas sampling system　　　　　　　　　　　　　　　
  Izumoto Satoshi; Hamamoto Shoichiro; Kawamoto Ken; Nagamori Masanao; Nishimura Taku
  ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, Volume：25, Number：24, First page：24500, Last page：24506, Aug. 2018, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s11356-018-2671-1
  DOI ID：10.1007/s11356-018-2671-1, ISSN：0944-1344, eISSN：1614-7499, Web of Science ID：WOS:000441784000089
• Runoff and nutrient loss from a water-repellent soil　　　　　　　　　　　　　　　
  Karin Müller; Karen Mason; Alfonso Gastelum Strozzi; Robert Simpson; Toshiko Komatsu; Ken Kawamoto; Brent Clothier
  Geoderma, Volume：322, First page：28, Last page：37, Jul. 2018, [Reviewed]
  Elsevier B.V., English, Scientific journal
  DOI：https://doi.org/10.1016/j.geoderma.2018.02.019
  DOI ID：10.1016/j.geoderma.2018.02.019, ISSN：0016-7061, SCOPUS ID：85042317407
• Reviews on the applicability of construction and demolition waste as low-cost adsorbents to remove-heavy metals in wastewater　　　　　　　　　　　　　　　
  G. M.P. Kumara; Takeshi Saito; Shingo Asamoto; Ken Kawamoto
  International Journal of GEOMATE, Volume：14, Number：42, First page：44, Last page：51, 2018, [Reviewed], [Last]
  English, Scientific journal
  DOI：https://doi.org/10.21660/2018.42.7148
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85040908556&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85040908556&origin=inward
  DOI ID：10.21660/2018.42.7148, ISSN：2186-2982, SCOPUS ID：85040908556, 共同研究・競争的資金等ID：44511249
• Effectiveness of permeable reactive barrier (PRB) on heavy metal trap in aquifer at solid waste dumpsite: A simulation study　　　　　　　　　　　　　　　
  Udayagee Kumarasinghe; Y. Sakamoto; T. Saito; M. Nagamori; C. S. Kalpage; G. B. Herath; M. I.M. Mowjood; Ken Kawamoto
  International Journal of GEOMATE, Volume：15, Number：51, First page：225, Last page：232, 2018, [Reviewed], [Last]
  English, Scientific journal
  DOI：https://doi.org/10.21660/2018.51.7179
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85048772836&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85048772836&origin=inward
  DOI ID：10.21660/2018.51.7179, ISSN：2186-2982, SCOPUS ID：85048772836, 共同研究・競争的資金等ID：44511249
• EFFECT OF TEMPERATURE CHANGE ON DISSOLUTION CHARACTERISTICS AND CHEMICAL FORMS OF BORON AND ARSENIC IN SEDIMENTS　　　　　　　　　　　　　　　
  SAITO Takeshi; HAMAMOTO Shoichiro; TAKEMURA Takato; UESHIMA Masato; KAWAMOTO Ken; KOMATSU Toshiko
  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research), Volume：74, Number：1, First page：8, Last page：15, 2018, [Reviewed]
  The objective of this study was to clarify the effect of temperature change on dissolution characteristics and chemical forms of boron and arsenic in four sediments (obtained from 50 m length boring core) from the middle part of the Arakawa Lowland located north of the Tokyo metropolitan area, Japan. Dissolution experiment (fractionated as water-soluble (dissolved) fraction) of these four sediments was carried out under anaerobic and different temperature (15°C, 25°C, and 40°C) conditions. For the sediments after the dissolution experiment, sequential extraction method that selectively fractionates five chemical forms (exchangeable fraction, bound to carbonates, bound to iron and manganese oxides, bound to organic matter, and residual fraction) was applied. Especially for some sediments which were significantly affected by temperature change in the dissolution experiment, maximum dissolution amount, i.e., total amount of water-soluble and exchangeable fractions and bound to carbonates increased with increase in temperature. On the other hand, bound to iron and manganese oxides showed a decreasing trend with increasing temperature. These results suggested that bound to iron and manganese oxides containing boron and arsenic changed to relatively soluble fractions of boron and arsenic such as water-soluble and exchangeable fractions and bound to carbonates with temperature increase.
  Japan Society of Civil Engineers, Japanese, Scientific journal
  DOI：https://doi.org/10.2208/jscejer.74.8
  DOI ID：10.2208/jscejer.74.8, eISSN：2185-6648, CiNii Articles ID：130006386873
• Closure to discussion of “Pore network structure linked by X-ray CT to particle characteristics and transport parameters” by Hamamoto S., Moldrup P., Kawamoto K., Sakaki T., Nishimura T., and Komtatsu, T　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Toshihiro Sakaki; Taku Nishimura; Toshiko Komatsu
  Soils and Foundations, Volume：57, Number：5, First page：901, Last page：903, Oct. 2017, [Reviewed]
  Japanese Geotechnical Society, English, Scientific journal
  DOI：https://doi.org/10.1016/j.sandf.2017.08.016
  DOI ID：10.1016/j.sandf.2017.08.016, ISSN：0038-0806, SCOPUS ID：85030647903
• Characterization of locally available soil as a liner material for solid waste landfills in Sri Lanka　　　　　　　　　　　　　　　
  Hafiz Muhammad Awais Rashid; J. A.D.K. Wanigarathna; L. C. Kurukulasuriya; N. H. Priyankara; A. M.N. Alagiyawanna; Takeshi Saito; Ken Kawamoto
  Environmental Earth Sciences, Volume：76, Number：11, Jun. 2017, [Reviewed], [Last]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s12665-017-6717-3
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85020045112&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85020045112&origin=inward
  DOI ID：10.1007/s12665-017-6717-3, ISSN：1866-6280, eISSN：1866-6299, SCOPUS ID：85020045112, 共同研究・競争的資金等ID：44511249
• Microcosm experiments on a coconut-fibre biofilm treatment system to evaluatewaste water treatment efficiencies　　　　　　　　　　　　　　　
  Naofumi Sato; W. N.K. Dharmarathne; Takeshi Saito; Hiroyasu Sato; Norio Tanaka; Ken Kawamoto
  International Journal of GEOMATE, Volume：12, Number：33, First page：160, Last page：166, May 2017, [Last]
  English, Scientific journal
  DOI：https://doi.org/10.21660/2017.33.2754
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85018239515&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85018239515&origin=inward
  DOI ID：10.21660/2017.33.2754, ISSN：2186-2982, SCOPUS ID：85018239515, 共同研究・競争的資金等ID：44511249
• Temporal variations in perched water and groundwater qualities at an open solid waste dumpsite in Sri Lanka　　　　　　　　　　　　　　　
  Udayagee Kumarasinghe; Y. Inoue; T. Saito; M. Nagamori; Y. Sakamoto; M. I.M. Mowjood; K. Kawamoto
  International Journal of GEOMATE, Volume：13, Number：38, First page：1, Last page：8, 2017
  Scientific journal
  DOI：https://doi.org/10.21660/2017.38.2761
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85020117172&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85020117172&origin=inward
  DOI ID：10.21660/2017.38.2761, ISSN：2186-2982, SCOPUS ID：85020117172
• Coconut-Fibre Biofilm Wastewater Treatment System in Sri Lanka: Microcosm Experiments for Evaluating Wastewater Treatment Efficiencies and Oxygen Consumption
  Naofumi Sato; Takeshi Saito; Hiroyasu Satoh; Norio Tanaka; Ken Kawamoto
  International Journal of Environmental Science and Development, Volume：8, Number：10, First page：691, Last page：695, 2017, [Reviewed], [Last]
  EJournal Publishing, English, Scientific journal
  DOI：https://doi.org/10.18178/ijesd.2017.8.10.1040
  DOI ID：10.18178/ijesd.2017.8.10.1040, eISSN：2010-0264, 共同研究・競争的資金等ID：44511249
• Characterization of temporal variations in landfill gas components inside an open solid waste dump site in Sri Lanka　　　　　　　　　　　　　　　
  Masanao Nagamori; M. I. M. Mowjood; Youichi Watanabe; Yugo Isobe; Tomonori Ishigaki; Ken Kawamoto
  JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION, Volume：66, Number：12, First page：1257, Last page：1267, Dec. 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1080/10962247.2016.1212746
  DOI ID：10.1080/10962247.2016.1212746, ISSN：1096-2247, eISSN：2162-2906, Web of Science ID：WOS:000387785100010
• Characterizing volatile organic compounds in leachate from Gohagoda municipal solid waste dumpsite, Sri Lanka　　　　　　　　　　　　　　　
  Prasanna Kumarathilaka; Yohan Jayawardhana; B. F.A. Basnayake; M. I.M. Mowjood; M. Nagamori; Takeshi Saito; Ken Kawamoto; Meththika Vithanage
  Groundwater for Sustainable Development, Volume：2-3, First page：1, Last page：6, Aug. 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.gsd.2016.04.001
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84969760258&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84969760258&origin=inward
  DOI ID：10.1016/j.gsd.2016.04.001, eISSN：2352-801X, SCOPUS ID：84969760258, 共同研究・競争的資金等ID：44511249
• Pore network structure linked by X-ray CT to particle characteristics and transport parameters　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Toshihiro Sakaki; Taku Nishimura; Toshiko Komatsu
  SOILS AND FOUNDATIONS, Volume：56, Number：4, First page：676, Last page：690, Aug. 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.sandf.2016.07.008
  DOI ID：10.1016/j.sandf.2016.07.008, ISSN：0038-0806, Web of Science ID：WOS:000384065100008
• Temperature change affected groundwater quality in a confined marine aquifer during long-term heating and cooling　　　　　　　　　　　　　　　
  Takeshi Saito; Shoichiro Hamamoto; Takashi Ueki; Satoshi Ohkubo; Per Moldrup; Ken Kawamoto; Toshiko Komatsu
  WATER RESEARCH, Volume：94, First page：120, Last page：127, May 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.watres.2016.01.043
  DOI ID：10.1016/j.watres.2016.01.043, ISSN：0043-1354, Web of Science ID：WOS:000374360900012
• Temperature effects on solute diffusion and adsorption in differently compacted kaolin clay　　　　　　　　　　　　　　　
  Ei Ei Mon; Shoichiro Hamamoto; Ken Kawamoto; Toshiko Komatsu; Per Moldrup
  ENVIRONMENTAL EARTH SCIENCES, Volume：75, Number：7, Apr. 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s12665-016-5358-2
  DOI ID：10.1007/s12665-016-5358-2, ISSN：1866-6280, eISSN：1866-6299, Web of Science ID：WOS:000373635400021
• Adsorption of Cd²⁺ and Pb²⁺ onto coconut shell biochar and biochar-mixed soil　　　　　　　　　　　　　　　
  G. N. Paranavithana; K. Kawamoto; Y. Inoue; T. Saito; M. Vithanage; C. S. Kalpage; G. B.B. Herath
  Environmental Earth Sciences, Volume：75, Number：6, Mar. 2016
  Scientific journal
  DOI：https://doi.org/10.1007/s12665-015-5167-z
  Scopus：https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84960976929&origin=inward
  Scopus Citedby：https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84960976929&origin=inward
  DOI ID：10.1007/s12665-015-5167-z, ISSN：1866-6280, eISSN：1866-6299, SCOPUS ID：84960976929
• Soil-water repellency characteristic curves for soil profiles with organic carbon gradients　　　　　　　　　　　　　　　
  Nadeeka Senani Wijewardana; Karin Mueller; Per Moldrup; Brent Clothier; Toshiko Komatsu; Syuntaro Hiradate; Lis Wollesen de Jonge; Ken Kawamoto
  GEODERMA, Volume：264, First page：150, Last page：159, Feb. 2016, [Reviewed], [Last]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.geoderma.2015.10.020
  DOI ID：10.1016/j.geoderma.2015.10.020, ISSN：0016-7061, eISSN：1872-6259, Web of Science ID：WOS:000366776100016, 共同研究・競争的資金等ID：44511241
• Transport properties and pore-network structure in variably-saturated Sphagnum peat soil　　　　　　　　　　　　　　　
  S. Hamamoto; S. H. Dissanayaka; K. Kawamoto; O. Nagata; T. Komtatsu; P. Moldrup
  EUROPEAN JOURNAL OF SOIL SCIENCE, Volume：67, Number：1, First page：121, Last page：131, Jan. 2016, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1111/ejss.12312
  DOI ID：10.1111/ejss.12312, ISSN：1351-0754, eISSN：1365-2389, ORCID：38310240, Web of Science ID：WOS:000368079600015
• Characterization of water repellency for hydrophobized grains with different geometries and sizes　　　　　　　　　　　　　　　
  N. Senani Wijewardana; Ken Kawamoto; Per Moldrup; Toshiko Komatsu; L. Chandana Kurukulasuriya; Nadeej H. Priyankara
  ENVIRONMENTAL EARTH SCIENCES, Volume：74, Number：7, First page：5525, Last page：5539, Oct. 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1007/s12665-015-4565-6
  DOI ID：10.1007/s12665-015-4565-6, ISSN：1866-6280, eISSN：1866-6299, Web of Science ID：WOS:000362016100006
• The Water-Induced Linear Reduction Gas Diffusivity Model Extended to Three Pore Regions　　　　　　　　　　　　　　　
  T. K. K. Chamindu Deepagoda; Lis Wollesen de Jonge; Ken Kawamoto; Toshiko Komatsu; Per Moldrup
  VADOSE ZONE JOURNAL, Volume：14, Number：10, Oct. 2015, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2015.04.0051
  DOI ID：10.2136/vzj2015.04.0051, ISSN：1539-1663, Web of Science ID：WOS:000367225300003
• Geotechnical Properties of Kanto Alluvial Soils based on Geochemical Survey　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Ken Kawamoto; Takato Takemura; Katsumi Kimura; Toshiko Komatsu; Masanobu Oda
  GSTF Journal of Geological Sciences, Volume：2, Number：1, First page：1, Last page：7, Jul. 2015, [Reviewed]
  Global Science {\&} Technology Forum Pte Ltd., Scientific journal
  DOI：https://doi.org/10.5176/2335-6774_2.1.18
  DOI ID：10.5176/2335-6774_2.1.18, ORCID：35962418
• Temperature effects on geotechnical and hydraulic properties of bentonite hydrated with inorganic salt solutions　　　　　　　　　　　　　　　
  H. M.A. Rashid; K. Kawamoto; T. Saito; T. Komatsu; Y. Inoue; P. Moldrup
  International Journal of GEOMATE, Volume：8, Number：1, First page：1172, Last page：1179, 2015, [Reviewed]
  GEOMATE International Society, English, Scientific journal
  ISSN：2186-2982, SCOPUS ID：84930268026
• Modeling gravity effects on water retention and gas transport characteristics in plant growth substrates　　　　　　　　　　　　　　　
  T. K. K. Chamindu Deepagoda; Scott B. Jones; Markus Tuller; Lis Wollesen de Jonge; Ken Kawamoto; Toshiko Komatsu; Per Moldrup
  ADVANCES IN SPACE RESEARCH, Volume：54, Number：4, First page：797, Last page：808, Aug. 2014, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.asr.2014.04.018
  DOI ID：10.1016/j.asr.2014.04.018, ISSN：0273-1177, eISSN：1879-1948, Web of Science ID：WOS:000339692800022
• Simultaneous Loss of Soil Biodiversity and Functions along a Copper Contamination Gradient: When Soil Goes to Sleep　　　　　　　　　　　　　　　
  Muhammad Naveed; Per Moldrup; Emmanuel Arthur; Martin Holmstrup; Mogens Nicolaisen; Markus Tuller; Lasantha Herath; Shoichiro Hamamoto; Ken Kawamoto; Toshiko Komatsu; Hans-Joerg Vogel; Lis Wollesen de Jonge
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：78, Number：4, First page：1239, Last page：1250, Jul. 2014, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2014.02.0052
  DOI ID：10.2136/sssaj2014.02.0052, ISSN：0361-5995, eISSN：1435-0661, Web of Science ID：WOS:000343163800011
• A new method to quantify how water repellency compromises soils' filtering function　　　　　　　　　　　　　　　
  K. Mueller; M. Deurer; K. Kawamoto; T. Kuroda; S. Subedi; S. Hiradate; T. Komatsu; B. E. Clothier
  EUROPEAN JOURNAL OF SOIL SCIENCE, Volume：65, Number：3, First page：348, Last page：359, May 2014, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1111/ejss.12136
  DOI ID：10.1111/ejss.12136, ISSN：1351-0754, eISSN：1365-2389, Web of Science ID：WOS:000335445800003
• Adsorption of Cd(II) and Pb(II) onto humic acid-treated coconut (cocos nucifera) husk　　　　　　　　　　　　　　　
  B. G.N. Sewwandi; Meththika Vithanage; S. S.R.M.D.H.R. Wijesekara; M. I.M. Mowjood; Shoichiro Hamamoto; Ken Kawamoto
  Journal of Hazardous, Toxic, and Radioactive Waste, Volume：18, Number：2, 2014, [Last]
  American Society of Civil Engineers (ASCE), English, Scientific journal
  DOI：https://doi.org/10.1061/(ASCE)HZ.2153-5515.0000196
  DOI ID：10.1061/(ASCE)HZ.2153-5515.0000196, ISSN：2153-5515, SCOPUS ID：84896290879, 共同研究・競争的資金等ID：44511249
• Contact Angles of Water-repellent Porous Media Inferred by Tensiometer- TDR Probe Measurement Under Controlled Wetting and Drying Cycles　　　　　　　　　　　　　　　
  Shaphal Subedi; Ken Kawamoto; Toshiko Komatsu; Per Moldrup; Lis Wollesen de Jonge; Karin Mueller; Brent Clothier
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：77, Number：6, First page：1944, Last page：1954, Nov. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2013.05.0203
  DOI ID：10.2136/sssaj2013.05.0203, ISSN：0361-5995, eISSN：1435-0661, Web of Science ID：WOS:000327024500005
• Mini tensiometer-time domain reflectometry coil probe for measuring soil water retention properties　　　　　　　　　　　　　　　
  Shaphal Subedi; Ken Kawamoto; Anurudda Kumara Karunarathna; Per Moldrup; Lis Wollesen De Jonge; Toshiko Komatsu
  Soil Science Society of America Journal, Volume：77, Number：5, First page：1517, Last page：1528, Sep. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2012.0106
  DOI ID：10.2136/sssaj2012.0106, ISSN：0361-5995, SCOPUS ID：84884873654
• Gas Diffusivity-Based Design and Characterization of Greenhouse Growth Substrates　　　　　　　　　　　　　　　
  T. K. K. Chamindu Deepagoda; Per Moldrup; Markus Tuller; Mette Pedersen; Jose Choc Chen Lopez; Lis Wollesen de Jonge; Ken Kawamoto; Toshiko Komatsu
  VADOSE ZONE JOURNAL, Volume：12, Number：3, Aug. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2013.03.0061
  DOI ID：10.2136/vzj2013.03.0061, ISSN：1539-1663, Web of Science ID：WOS:000323161600039
• Structure-Dependent Water-Induced Linear Reduction Model for Predicting Gas Diffusivity and Tortuosity in Repacked and Intact Soil　　　　　　　　　　　　　　　
  Per Moldrup; T. K. K. Chamindu Deepagoda; Shoichiro Hamamoto; Toshiko Komatsu; Ken Kawamoto; Dennis E. Rolston; Lis Wollesen de Jonge
  VADOSE ZONE JOURNAL, Volume：12, Number：3, Aug. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2013.01.0026
  DOI ID：10.2136/vzj2013.01.0026, ISSN：1539-1663, Web of Science ID：WOS:000323161600009
• Modeling Air Permeability in Variably Saturated Soil from Two Natural Clay Gradients　　　　　　　　　　　　　　　
  Chamindu T. K. K. Deepagoda; Emmanuel Arthur; Per Moldrup; Shoichiro Hamamoto; Ken Kawamoto; Toshiko Komatsu; Lis Wollesen de Jonge
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：77, Number：2, First page：362, Last page：371, Mar. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2012.0300
  DOI ID：10.2136/sssaj2012.0300, ISSN：0361-5995, eISSN：1435-0661, Web of Science ID：WOS:000322827900003
• Correlating Gas Transport Parameters and X-Ray Computed Tomography Measurements in Porous Media　　　　　　　　　　　　　　　
  Muhammad Naveed; Shoichiro Hamamoto; Ken Kawamoto; Toshihiro Sakaki; Manabu Takahashi; Toshiko Komatsu; Per Moldrup; Mathieu Lamande; Dorthe Wildenschild; Masa Prodanovic; Lis Wollesen de Jonge
  SOIL SCIENCE, Volume：178, Number：2, First page：60, Last page：68, Feb. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1097/SS.0b013e318288784c
  DOI ID：10.1097/SS.0b013e318288784c, ISSN：0038-075X, Web of Science ID：WOS:000316738500002
• Effects of Sedimentary Depositional Environment on the Dynamic Mechanical Properties of Holocene Clay in the Southern Kanto Plain, Central Japan　　　　　　　　　　　　　　　
  TAKEMURA Takato; ODA Masanobu; HAMAMOTO Shoichiro; KAWAMOTO Ken; AKAMA Tomoya; TAI Hidemichi; KIMURA Katsumi
  J. Geogr., Volume：122, Number：3, First page：472, Last page：492, 2013, [Reviewed]
  The effects of earthquakes in the Kanto district are strongly related to the three-dimensional distribution of the soil mechanical properties of Chuseki-so, which is the name given to incised-valley fills from the Late Pleistocene to the Holocene. To characterize the effects of the sedimentary depositional environment and sedimentary process of Chuseki-so on soil mechanical properties, PS logging test, physical-chemical test, consolidation test, cyclic tri-axial test, and bender element test were conducted on an undisturbed core sample. Based on the test results, we propose a method to estimate the elastic shear modulus of clay soil from conventional soil properties, and discuss the relationship between the sedimentary process of Chuseki-so and the three-dimensional distribution of soil mechanical properties. Through our investigation, we derived the following conclusions: (1) The delta front and inner bay deposits of the Kasukabe core in the Nakagawa Lowland comprise very soft clay and have a high water content and liquidity index; these characteristics are related to the sedimentary depositional environment such as water depth and salinity (ratio of marine diatoms in the sediment). (2) The proposed method can be used to estimate elastic shear moduli on the basis of water content, depth, and locality parameter; in particular, it can be used to evaluate very soft clay, the N value of which is less than 1, on the basis of water content, an easily measurable property. (3) Both bender element and PS logging tests show similar S-wave velocities, and elastic shear moduli measured using the respective tests, G₀^BE and G₀^PS, were also similar; therefore, elastic shear moduli can be determined through measurements using these two tests or estimations based on water content. (4) The method to determine the elastic shear modulus, G₀^TR, which is obtained using a cyclic test, is proposed based on the H-D model; G₀^TR btained correlates well with G₀^BE, even if though it is obtained by a different method. The proposed method can be used to determine elastic shear moduli with great accurac.
  Tokyo Geographical Society, Japanese
  DOI：https://doi.org/10.5026/jgeography.122.472
  DOI ID：10.5026/jgeography.122.472, ISSN：0022-135X, CiNii Articles ID：130003373649
• EFFECT OF DRYING AND WETTING PROCESSES ON AIR PERMEABILITY OF UNSATURATED SAND　　　　　　　　　　　　　　　
  SASANUMA Kumi; HAMAMOTO Shoichiro; KAWAMOTO Ken; SAKAKI Toshihiro; KOMATSU Toshiko
  Journal of Japan Society of Civil Engineers, Ser. C (Geosphere Engineering), Volume：69, Number：3, First page：378, Last page：385, 2013, [Reviewed]
  Understanding the relationship among water saturation, water matric potential, and air permeability is important for accurately simulating the behavior of toxic gases at the polluted site and optimizing remediation technologies. In this study, air permeability (k_a) was measured on sands with different particle sizes and shapes during drying and wetting cycles. The hysteresis in soil-water retention highly affected gas transport, showing higher k_a for the wetting processes than for the drying processes at the same air content for all sand samples. This suggests that the existence of more continuous air-filled pore networks for the wetting processes enhanced advective gas transport. A power-law type k_a model was applied to the measured data, demonstrating a clear relation between the pore network tortuosity factor in the k_a model and model parameters for describing water retention characteristics. In addition, it is indicated that for sands with rough particle shape the continuity in larger-pore network is obstructed by the soil water filled in smaller pores as compared to sands with round shape.
  Japan Society of Civil Engineers, Japanese
  DOI：https://doi.org/10.2208/jscejge.69.378
  DOI ID：10.2208/jscejge.69.378, eISSN：2185-6516, CiNii Articles ID：130004559405
• Thermal properties of sands at variably-saturated condition: Effects of particle size and shape, and quartz content　　　　　　　　　　　　　　　
  KAMOSHIDA Takahisa; HAMAMOTO Shoichiro; KAWAMOTO Ken; SAKAKI Toshihiro; KOMATSU Toshiko
  Journal of the Japanese Society of Soil Physics, Volume：11, First page：11, Last page：16, 2013, [Reviewed]
  Thermal properties of sands with different par-ticle size and shape were measured. All sands showed the similar trend for the change in heat capacity, increas-ing with increasing in water content (θ).The gradient of the thermal conductivity (λ) to θ under the dry region (θ < 0.05 〜0.10) increased with increasing particle size for sands with rough shape, indicating an increase in con-tact points per soil particle highly enhanced thermal con-duction. Oppositely, for the wet region (θ > 0.05 〜0.10), the gradient of λ to 0 were similar for sands with different particle size. Equations of λ at completely dry condition and water saturation were derived from obtained relation-ships between quartz content and Z in this study. By in-serting these equations, existing models for thermal con-ductivity were modified, which markedly improved model performances.
  Japanese Society of Soil Physics, Japanese
  DOI：https://doi.org/10.34467/jssoilphysics.124.0_11
  DOI ID：10.34467/jssoilphysics.124.0_11, ISSN：0387-6012, eISSN：2435-2497, CiNii Articles ID：130008072513, CiNii Books ID：AN00347581
• Soil Specific Surface Area and Non-Singularity of Soil-Water Retention at Low Saturations　　　　　　　　　　　　　　　
  Emmanuel Arthur; Markus Tuller; Per Moldrup; Augustus C. Resurreccion; Mercer S. Meding; Ken Kawamoto; Toshiko Komatsu; Lis Wollesen de Jonge
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：77, Number：1, First page：43, Last page：53, Jan. 2013, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2012.0262
  DOI ID：10.2136/sssaj2012.0262, ISSN：0361-5995, Web of Science ID：WOS:000321750500005
• Prediction of the Soil Water Characteristic from Soil Particle Volume Fractions　　　　　　　　　　　　　　　
  Muhammad Naveed; Per Moldrup; Markus Tuller; T. P. A. Ferre; Ken Kawamoto; Toshiko Komatsu; Lis Wollesen de Jonge
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：76, Number：6, First page：1946, Last page：1956, Nov. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2012.0124
  DOI ID：10.2136/sssaj2012.0124, ISSN：0361-5995, Web of Science ID：WOS:000312180100003
• Maxwell's Law Based Models for Liquid and Gas Phase Diffusivities in Variably-Saturated Soil　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Toshiko Komatsu
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：76, Number：5, First page：1509, Last page：1517, Sep. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2012.0033
  DOI ID：10.2136/sssaj2012.0033, ISSN：0361-5995, Web of Science ID：WOS:000308806300001
• Diffusion Aspects of Designing Porous Growth Media for Earth and Space　　　　　　　　　　　　　　　
  Deepagoda T. K. K. Chamindu; Per Moldrup; Maria P. Jensen; Scott B. Jones; Lis Wollesen de Jonge; Per Schjonning; Kate Scow; Jan W. Hopmans; Dennis E. Rolston; Ken Kawamoto; Toshiko Komatsu
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：76, Number：5, First page：1564, Last page：1578, Sep. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2011.0438
  DOI ID：10.2136/sssaj2011.0438, ISSN：0361-5995, eISSN：1435-0661, Web of Science ID：WOS:000308806300006
• Gas Dispersion in Granular Porous Media under Air-Dry and Wet Conditions　　　　　　　　　　　　　　　
  Muhammad Naveed; Shoichiro Hamamoto; Ken Kawamoto; Toshihiro Sakaki; Manabu Takahashi; Toshiko Komatsu; Lis Wollesen de Jonge; Mathieu Lamande; Per Moldrup
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：76, Number：3, First page：845, Last page：852, May 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2011.0314
  DOI ID：10.2136/sssaj2011.0314, ISSN：0361-5995, Web of Science ID：WOS:000304725100010
• Organic Matter Fraction Dependent Model for Predicting the Gas Diffusion Coefficient in Variably Saturated Soils　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Toshiko Komatsu
  VADOSE ZONE JOURNAL, Volume：11, Number：1, Feb. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2011.0065
  DOI ID：10.2136/vzj2011.0065, ISSN：1539-1663, Web of Science ID：WOS:000304802500014
• Thermal Properties of Peaty Soils: Effects of Liquid-Phase Impedance Factor and Shrinkage　　　　　　　　　　　　　　　
  Shiromi Himalika Dissanayaka; Shoichiro Hamamoto; Ken Kawamoto; Toshiko Komatsu; Per Moldrup
  VADOSE ZONE JOURNAL, Volume：11, Number：1, Feb. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2011.0092
  DOI ID：10.2136/vzj2011.0092, ISSN：1539-1663, Web of Science ID：WOS:000304802500025
• Characterizing Time-Dependent Contact Angles for Sands Hydrophobized with Oleic and Stearic Acids　　　　　　　　　　　　　　　
  Shaphal Subedi; Ken Kawamoto; Lakmal Jayarathna; Meththika Vithanage; Per Moldrup; Lis Wollesen de Jonge; Toshiko Komatsu
  VADOSE ZONE JOURNAL, Volume：11, Number：1, Feb. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2011.0055
  DOI ID：10.2136/vzj2011.0055, ISSN：1539-1663, Web of Science ID：WOS:000304802500010
• Unified measurement system with suction control for measuring hysteresis in soil-gas transport parameters　　　　　　　　　　　　　　　
  Md Abdur Rouf; Shoichiro Hamamoto; Ken Kawamoto; Toshihiro Sakaki; Toshiko Komatsu; Per Moldrup
  WATER RESOURCES RESEARCH, Volume：48, Feb. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1029/2011WR010615
  DOI ID：10.1029/2011WR010615, ISSN：0043-1397, Web of Science ID：WOS:000300231500001
• Variable Pore Connectivity Model Linking Gas Diffusivity and Air-Phase Tortuosity to Soil Matric Potential　　　　　　　　　　　　　　　
  T. K. K. Chamindu Deepagoda; Per Moldrup; Per Schjonning; Ken Kawamoto; Toshiko Komatsu; Lis Wollesen de Jonge
  VADOSE ZONE JOURNAL, Volume：11, Number：1, Feb. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2011.0096
  DOI ID：10.2136/vzj2011.0096, ISSN：1539-1663, Web of Science ID：WOS:000304802500026
• The pH Dependency of 2,4-Dichlorophenoxyacetic Acid Adsorption and Desorption in Andosol and Kaolinite　　　　　　　　　　　　　　　
  Ei Ei Mon; Anu Sharma; Ken Kawamoto; Shoichiro Hamamoto; Toshiko Komatsu; Syuntaro Hiradate; Per Moldrup
  SOIL SCIENCE, Volume：177, Number：1, First page：12, Last page：21, Jan. 2012, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1097/SS.0b013e3182376ef3
  DOI ID：10.1097/SS.0b013e3182376ef3, ISSN：0038-075X, Web of Science ID：WOS:000299164400002
• Effects of dry bulk density and particle size fraction on gas transport parameters in variably saturated landfill cover soil　　　　　　　　　　　　　　　
  Praneeth Wickramarachchi; Ken Kawamoto; Shoichiro Hamamoto; Masanao Nagamori; Per Moldrup; Toshiko Komatsu
  WASTE MANAGEMENT, Volume：31, Number：12, First page：2464, Last page：2472, Dec. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.wasman.2011.07.008
  DOI ID：10.1016/j.wasman.2011.07.008, ISSN：0956-053X, Web of Science ID：WOS:000297485700011
• Transport and deposition of suspended soil colloids in saturated sand columns　　　　　　　　　　　　　　　
  Anu Sharma; Ken Kawamoto; Per Moldrup; Lis Wollesen de Jonge; Toshiko Komatsu
  Journal of Hazardous, Toxic, and Radioactive Waste, Volume：15, Number：4, First page：275, Last page：284, Nov. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1061/(ASCE)HZ.1944-8376.0000060
  DOI ID：10.1061/(ASCE)HZ.1944-8376.0000060, ISSN：2153-5493, SCOPUS ID：80155137241
• Gas transport parameters for compacted reddish-brown soil in sri lankan landfill final cover　　　　　　　　　　　　　　　
  Praneeth Wickramarachchi; Kaushalya Ranasinghe; Shoichiro Hamamoto; Ken Kawamoto; Udeni P. Nawagamuwa; Per Moldrup; Toshiko Komatsu
  Journal of Hazardous, Toxic, and Radioactive Waste, Volume：15, Number：4, First page：285, Last page：295, Nov. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1061/(ASCE)HZ.1944-8376.0000078
  DOI ID：10.1061/(ASCE)HZ.1944-8376.0000078, ISSN：2153-5493, SCOPUS ID：80155137236
• Transport and Deposition of Variably Charged Soil Colloids in Saturated Porous Media　　　　　　　　　　　　　　　
  Anu Sharma; Ken Kawamoto; Per Moldrup; Lis Wollesen de Jonge; Toshiko Komatsu
  VADOSE ZONE JOURNAL, Volume：10, Number：4, First page：1228, Last page：1241, Nov. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2010.0161
  DOI ID：10.2136/vzj2010.0161, ISSN：1539-1663, Web of Science ID：WOS:000297377000009
• Extreme Compaction Effects on Gas Transport Parameters and Estimated Climate Gas Exchange for a Landfill Final Cover Soil　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Praneeth Nishadi Wickramarachchi; Masanao Nagamori; Toshiko Komatsu
  JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, Volume：137, Number：7, First page：653, Last page：662, Jul. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1061/(ASCE)GT.1943-5606.0000459
  DOI ID：10.1061/(ASCE)GT.1943-5606.0000459, ISSN：1090-0241, Web of Science ID：WOS:000292517800003
• Generalized Density-Corrected Model for Gas Diffusivity in Variably Saturated Soils　　　　　　　　　　　　　　　
  T. K. K. Chamindu Deepagoda; Per Moldrup; Per Schjonning; Ken Kawamoto; Toshiko Komatsu; Lis Wollesen de Jonge
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：75, Number：4, First page：1315, Last page：1329, Jul. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2010.0405
  DOI ID：10.2136/sssaj2010.0405, ISSN：0361-5995, Web of Science ID：WOS:000293076400012
• Relationship between specific surface area and the dry end of the water retention curve for soils with varying clay and organic carbon contents　　　　　　　　　　　　　　　
  Augustus C. Resurreccion; Per Moldrup; Markus Tuller; T. P. A. Ferre; Ken Kawamoto; Toshiko Komatsu; Lis Wollesen De Jonge
  WATER RESOURCES RESEARCH, Volume：47, Jun. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1029/2010WR010229
  DOI ID：10.1029/2010WR010229, ISSN：0043-1397, Web of Science ID：WOS:000292152900001
• Two-Region Extended Archie's Law Model for Soil Air Permeability and Gas Diffusivity　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Lis Wollesen de Jonge; Per Schjonning; Toshiko Komatsu
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：75, Number：3, First page：795, Last page：806, May 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2010.0207
  DOI ID：10.2136/sssaj2010.0207, ISSN：0361-5995, Web of Science ID：WOS:000290856500004
• Density-Corrected Models for Gas Diffusivity and Air Permeability in Unsaturated Soil　　　　　　　　　　　　　　　
  T. K. K. Chamindu Deepagoda; Per Moldrup; Per Schjonning; Lis Wollesen de Jonge; Ken Kawamoto; Toshiko Komatsu
  VADOSE ZONE JOURNAL, Volume：10, Number：1, First page：226, Last page：238, Feb. 2011, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2009.0137
  DOI ID：10.2136/vzj2009.0137, ISSN：1539-1663, Web of Science ID：WOS:000287573300019
• MOBILIZATION AND LEACHING OF NATURAL AND WATER DISPERSIBLE COLLOIDS IN AGGREGATED VOLCANIC ASH SOIL COLUMNS　　　　　　　　　　　　　　　
  Chamindu T. K. K. Deepagoda; Ken Kawamoto; Hirotaka Saito; Lis Wollesen de Jonge; Per Moldrup; Toshiko Komatsu
  SOILS AND FOUNDATIONS, Volume：51, Number：1, First page：123, Last page：132, Feb. 2011, [Reviewed]
  English, Scientific journal
  ISSN：0038-0806, Web of Science ID：WOS:000292233600010
• A Simple Beta-Function Model for Soil-Water Repellency as a Function of Water and Organic Carbon Contents　　　　　　　　　　　　　　　
  Anurudda Kumara Karunarathna; Ken Kawamoto; Per Moldrup; Lis Wollesen de Jonge; Toshiko Komatsu
  SOIL SCIENCE, Volume：175, Number：10, First page：461, Last page：468, Oct. 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1097/SS.0b013e3181f55ab6
  DOI ID：10.1097/SS.0b013e3181f55ab6, ISSN：0038-075X, Web of Science ID：WOS:000282562500001
• Two-Region Model for Soil Water Repellency as a Function of Matric Potential and Water Content　　　　　　　　　　　　　　　
  Anurudda Kumara Karunarathna; Per Moldrup; Ken Kawamoto; Lis Wollesen de Jonge; Toshiko Komatsu
  VADOSE ZONE JOURNAL, Volume：9, Number：3, First page：719, Last page：730, Aug. 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2009.0124
  DOI ID：10.2136/vzj2009.0124, ISSN：1539-1663, Web of Science ID：WOS:000284058700020
• Excluded-volume expansion of Archie's law for gas and solute diffusivities and electrical and thermal conductivities in variably saturated porous media　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Toshiko Komatsu
  WATER RESOURCES RESEARCH, Volume：46, Jun. 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1029/2009WR008424
  DOI ID：10.1029/2009WR008424, ISSN：0043-1397, Web of Science ID：WOS:000278993700002
• Hierarchical, Bimodal Model for Gas Diffusivity in Aggregated, Unsaturated Soils　　　　　　　　　　　　　　　
  Augustus C. Resurreccion; Per Moldrup; Ken Kawamoto; Shoichiro Hamamoto; Dennis E. Rolston; Toshiko Komatsu
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：74, Number：2, First page：481, Last page：491, Mar. 2010, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2009.0055
  DOI ID：10.2136/sssaj2009.0055, ISSN：0361-5995, Web of Science ID：WOS:000275187300016
• Production and consumption of greenhouse gases in a peatland forest soil
  森本聡; 永田修; 川本健; 長谷川周一
  土壌の物理性, Number：113, First page：3, Last page：12, Nov. 2009, [Reviewed]
  Japanese, Scientific journal
  ISSN：0387-6012, J-Global ID：201002215564608105
• Unified Measurement System for the Gas Dispersion Coefficient, Air Permeability, and Gas Diffusion Coefficient in Variably Saturated Soil　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Toshiko Komatsu; Dennis E. Rolston
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：73, Number：6, First page：1921, Last page：1930, Nov. 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2009.0012
  DOI ID：10.2136/sssaj2009.0012, ISSN：0361-5995, Web of Science ID：WOS:000271752700020
• The Solute Diffusion Coefficient in Variably Compacted, Unsaturated Volcanic Ash Soils　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Mandadige Samintha Anne Perera; Augustus Resurreccion; Ken Kawamoto; Shuichi Hasegawa; Toshiko Komatsu; Per Moldrup
  VADOSE ZONE JOURNAL, Volume：8, Number：4, First page：942, Last page：952, Nov. 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2008.0184
  DOI ID：10.2136/vzj2008.0184, ISSN：1539-1663, Web of Science ID：WOS:000271936900012
• Effect of Particle Size and Soil Compaction on Gas Transport Parameters in Variably Saturated, Sandy Soils　　　　　　　　　　　　　　　
  Shoichiro Hamamoto; Per Moldrup; Ken Kawamoto; Toshiko Komatsu
  VADOSE ZONE JOURNAL, Volume：8, Number：4, First page：986, Last page：995, Nov. 2009, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2008.0157
  DOI ID：10.2136/vzj2008.0157, ISSN：1539-1663, Web of Science ID：WOS:000271936900016
• EFFECTS OF BOUNDARY CONDITIONS ON SHAPE FACTOR FOR IN-SITU AIR PERMEABILITY MEASUREMENTS　　　　　　　　　　　　　　　
  HAMAMOTO Shoichiro; KAWAMOTO Ken; NAGAMORI Masanao; KOMATSU Toshiko; MOLDRUP Per
  Doboku Gakkai Ronbunshuu C, Volume：65, Number：2, First page：579, Last page：586, 2009, [Reviewed]
  In-situ air permeability (K_{a, insitu}) is a rapid field measurement that provides important information on soil-gas and water transport properties in soil. The K_{a, insitu} can be determined by using a shape factor taking account of field flow geometry effects on one-dimensional air flow. In this study, effects of lateral and bottom boundary conditions on the shape factor (G) and subsequent K_{a, insitu} were investigated by combining finite-element numerical simulations and a model experiment with repacked sand in a container. Results showed that calculated and measured values of G and K_{a, insitu} were highly dependent on the bottom boundary, and especially that a shallow zero-flux bottom boundary caused an underestimation of K_{a, insitu}. This shows that special care must be taken to determine the shape factor with due consideration to the proper boundary conditions. This is especially critical in the case of impermeable layers such as highly-compacted subsurface soil or a shallow groundwater table.
  Japan Society of Civil Engineers, Japanese
  DOI：https://doi.org/10.2208/jscejc.65.579
  DOI ID：10.2208/jscejc.65.579, eISSN：1880-604X, CiNii Articles ID：130004943055
• Adsorption of 2,4-dichlorophenoxyacetic acid onto volcanic ash soils: Effects of pH and soil organic matter　　　　　　　　　　　　　　　
  Ei Mon, E; T. Hirata; K. Kawamoto; S. Hiradate; T. Komatsu; P. Moldrup
  Volume：2, Number：1, First page：1, Last page：9, 2009, [Reviewed]
  English, Scientific journal
• USEFUL SOIL-WATER REPELLENCY INDICES: LINEAR CORRELATIONS　　　　　　　　　　　　　　　
  Carlos M. Regalado; Axel Ritter; Lis W. de Jonge; Ken Kawamoto; Toshiko Komatsu; Per Moldrup
  SOIL SCIENCE, Volume：173, Number：11, First page：747, Last page：757, Nov. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1097/SS.0b013e31818d4163
  DOI ID：10.1097/SS.0b013e31818d4163, ISSN：0038-075X, CiNii Articles ID：80019976641, Web of Science ID：WOS:000260935900001
• Linear model to predict soil-gas diffusivity from two soil-water retention points in unsaturated volcanic ash soils　　　　　　　　　　　　　　　
  Augustus C. Resurreccion; Toshiko Komatsu; Ken Kawamoto; Masanobu Oda; Seiko Yoshikawa; Per Moldrup
  SOILS AND FOUNDATIONS, Volume：48, Number：3, First page：397, Last page：406, Jun. 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.3208/sandf.48.397
  DOI ID：10.3208/sandf.48.397, ISSN：0038-0806, CiNii Articles ID：110007327346, Web of Science ID：WOS:000258745000007, 共同研究・競争的資金等ID：44511240
• Variable pore connectivity factor model for gas diffusivity in unsaturated, aggregated soil　　　　　　　　　　　　　　　
  Augustus C. Resurreccion; Per Moldrup; Ken Kawamoto; Seiko Yoshikawa; Dennis E. Rolston; Toshiko Komatsu
  VADOSE ZONE JOURNAL, Volume：7, Number：2, First page：397, Last page：405, May 2008, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2007.0058
  DOI ID：10.2136/vzj2007.0058, ISSN：1539-1663, Web of Science ID：WOS:000256204600001, 共同研究・競争的資金等ID：44511240
• 泥炭土のガス拡散・透気特性に脱水収縮が及ぼす影響　　　　　　　　　　　　　　　
  飯塚健仁; 川本健; 小松登志子; 長谷川周一
  土木学会論文集, Volume：G 64, Number：3, First page：242, Last page：249, 2008, [Reviewed], [Corresponding]
  Japanese, Scientific journal
  DOI：https://doi.org/10.2208/jscejg.64.242
  DOI ID：10.2208/jscejg.64.242
• Water repellency of aggregate size fractions of a volcanic ash soil　　　　　　　　　　　　　　　
  Ken Kawamoto; Per Moldrup; Toshiko Komatsu; Lis Wollesende de Jonge; Masanobu Oda
  SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, Volume：71, Number：6, First page：1658, Last page：1666, Nov. 2007, [Reviewed], [Lead, Corresponding]
  English, Scientific journal
  DOI：https://doi.org/10.2136/sssaj2006.0284
  DOI ID：10.2136/sssaj2006.0284, ISSN：0361-5995, CiNii Articles ID：80018041716, Web of Science ID：WOS:000251092100002, 共同研究・競争的資金等ID：44511243
• Gas diffusivity and air permeability in a volcanic ash soil profile: Effects of organic matter and water retention　　　　　　　　　　　　　　　
  Augustus C. Resurreccion; Ken Kawamoto; Toshiko Komatsu; Per Moldrup; Kuniaki Sato; Dennis E. Rolston
  SOIL SCIENCE, Volume：172, Number：6, First page：432, Last page：443, Jun. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1097/SS.0b013e3180471c94
  DOI ID：10.1097/SS.0b013e3180471c94, ISSN：0038-075X, CiNii Articles ID：80018462143, Web of Science ID：WOS:000247353000002, 共同研究・競争的資金等ID：44511240
• Gas transport parameters along field transects of a volcanic ash soil　　　　　　　　　　　　　　　
  Augustus C. Resurreccion; Ken Kawamoto; Toshiko Komatsu; Per Moldrup; Noriatsu Ozaki; Dennis E. Rolston
  SOIL SCIENCE, Volume：172, Number：1, First page：3, Last page：16, Jan. 2007, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1097/01.ss.0000235850.55944.04
  DOI ID：10.1097/01.ss.0000235850.55944.04, ISSN：0038-075X, CiNii Articles ID：80018673303, Web of Science ID：WOS:000243569100001, 共同研究・競争的資金等ID：44511240
• Gas transport parameters in the vadose zone: Development and tests of power-law models for air permeability　　　　　　　　　　　　　　　
  Ken Kawamoto; Per Moldrup; Per Schjonning; Bo V. Iversen; Toshiko Komatsu; Dennis E. Rolston
  VADOSE ZONE JOURNAL, Volume：5, Number：4, First page：1205, Last page：1215, Nov. 2006, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.2136/vzj2006.0030
  DOI ID：10.2136/vzj2006.0030, ISSN：1539-1663, Web of Science ID：WOS:000243724900015, 共同研究・競争的資金等ID：44511240
• Linking the gardner and campbell models for water retention and hydraulic conductivity in near-saturated soil　　　　　　　　　　　　　　　
  Ken Kawamoto; Per Moldrup; Ty P. A. Ferre; Markus Tuller; Ole H. Jacobsen; Toshiko Komatsu
  SOIL SCIENCE, Volume：171, Number：8, First page：573, Last page：584, Aug. 2006, [Reviewed], [Lead, Corresponding]
  English, Scientific journal
  DOI：https://doi.org/10.1097/01.ss.0000228035.72647.3c
  DOI ID：10.1097/01.ss.0000228035.72647.3c, ISSN：0038-075X, CiNii Articles ID：80019003470, Web of Science ID：WOS:000239875200001
• 土壌ガス拡散係数予測モデルの提案と国内土壌への適用　　　　　　　　　　　　　　　
  川本健; 小松登志子; PerMoldrup; 吉川省子; 藤川智紀
  土壌の物理性, Number：101, First page：37, Last page：50, 2005, [Reviewed]
  Japanese, Scientific journal
  ISSN：0387-6012, CiNii Articles ID：40007202059, CiNii Books ID：AN00347581
• Estimating Soil Water Characteristic Curves of Water Repellent Volcanic Ash Soils by Time Domain Reflectometry Coil Probe Measurements　　　　　　　　　　　　　　　
  KAWAMOTO Ken; BANYAR Aung; PER Moldrup; KOMATSU Toshiko; ODA Masanobu
  Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering, Volume：72, Number：5, First page：531, Last page：539, Oct. 2004, [Reviewed], [Lead, Corresponding]
  Japanese, Scientific journal
  ISSN：0387-2335, CiNii Articles ID：10013726291, CiNii Books ID：AN00201203, 共同研究・競争的資金等ID：44511243
• Experimental Study on Soil Water Repellency of Volcanic Ash Soils : Effects of Organic Matter Content and Initial Water Content　　　　　　　　　　　　　　　
  KAWAMOTO Ken; BANYAR Aung
  Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering, Volume：72, Number：2, First page：193, Last page：201, Apr. 2004, [Reviewed], [Lead, Corresponding]
  Japanese, Scientific journal
  ISSN：0387-2335, CiNii Articles ID：10012911085, CiNii Books ID：AN00201203, 共同研究・競争的資金等ID：44511243
• Moisture structures of laterally expanding fingering flows in sandy soils　　　　　　　　　　　　　　　
  K Kawamoto; S Mashino; M Oda; T Miyazaki
  GEODERMA, Volume：119, Number：3-4, First page：197, Last page：217, Apr. 2004, [Reviewed], [Lead, Corresponding]
  English, Scientific journal
  DOI：https://doi.org/10.1016/j.geoderma.2003.07.001
  DOI ID：10.1016/j.geoderma.2003.07.001, ISSN：0016-7061, CiNii Articles ID：80016533205, Web of Science ID：WOS:000220101400003, 共同研究・競争的資金等ID：44511243
• 現地計測と室内実験の組み合わせによる自然丘陵斜面表土の透水性評価　　　　　　　　　　　　　　　
  川本健; 大村大志; 小林邦宏; 久保順一
  Volume：52, Number：11, First page：35, Last page：37, 2004, [Lead, Corresponding]
  Japanese, Scientific journal
  共同研究・競争的資金等ID：44511243
• TDRコイルプローブ法による撥水性火山灰土壌の保水性評価　　　　　　　　　　　　　　　
  川本健; BanyarAung,PerMoldrup; 小松登志子; 小田匡寛
  Volume：233, First page：83, Last page：91, 2004, [Reviewed], [Lead, Corresponding]
  Japanese, Scientific journal
  DOI：https://doi.org/10.11408/jsidre1965.2004.531
  DOI ID：10.11408/jsidre1965.2004.531, 共同研究・競争的資金等ID：44511243
• 火山灰土壌の撥水性評価に関する実験的研究 -有機物含有量と初期水分量が及ぼす影響-　　　　　　　　　　　　　　　
  川本健; BanyarAung
  Volume：230, First page：75, Last page：83, 2004, [Reviewed], [Lead, Corresponding]
  Japanese, Scientific journal
  DOI：https://doi.org/10.11408/jsidre1965.2004.193
  DOI ID：10.11408/jsidre1965.2004.193, 共同研究・競争的資金等ID：44511243
• Microstructural interpretation on reliquefaction of saturated granular soils under cyclic loading　　　　　　　　　　　　　　　
  M Oda; K Kawamoto; K Suzuki; H Fujimori; M Sato
  JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, Volume：127, Number：5, First page：416, Last page：423, May 2001, [Reviewed]
  English, Scientific journal
  DOI：https://doi.org/10.1061/(ASCE)1090-0241(2001)127:5(416)
  DOI ID：10.1061/(ASCE)1090-0241(2001)127:5(416), ISSN：1090-0241, CiNii Articles ID：80012443432, Web of Science ID：WOS:000168293600004, 共同研究・競争的資金等ID：44511244
• 三軸試験装置における飽和砂の再液状化抵抗に及ぼす構造異方性の影響　　　　　　　　　　　　　　　
  鈴木輝一; 小田匡寛; 川本健; 藤森啓之
  構造工学論文集, Volume：46, Number：A, First page：289, Last page：298, 2000, [Reviewed]
  Japanese, Scientific journal
  共同研究・競争的資金等ID：44511244
• Hydro-geological study of landslides caused by heavy rainfall on August 1998 in Fukushima, Japan　　　　　　　　　　　　　　　
  Kawamoto, K; M. Oda; K. Suzuki
  Journal of Natural Disaster Science, Volume：22, Number：1, First page：13, Last page：23, 2000, [Reviewed], [Lead, Corresponding]
  English, Scientific journal
  DOI：https://doi.org/10.2328/jnds.22.13
  DOI ID：10.2328/jnds.22.13, ISSN：0388-4090, CiNii Articles ID：30018744648
• Fingering flow in homogeneous sandy soils under continuous rainfall infiltration　　　　　　　　　　　　　　　
  Kawamoto, K; T. Miyazaki
  Soils and Foundations, Volume：39, Number：4, First page：79, Last page：91, 1999, [Reviewed], [Lead, Corresponding]
  In order to establish a physical model leading to stable (uniform) and unstable (non-uniform fingering) flows in unsaturated soils, two-dimensional tests on continuous rainfall infiltration were carried out by changing not only the initial water content (air dry, 0.5%, 1.0%) but also the rainfall intensity (15,30,180 mm/h). The physical mechanism of fingering flow was discussed on the basis of precise suction measurements inside and outside the fingers. The results show that wetting fronts developed in unsaturated sandy soils can be classified into three types ; 1) fingering flow, 2) wavy front, and 3) plane front. Two types of fingering flow can be further distinguished by the difference of the swelling velocity ; i. e., low-swell finger and high-swell finger flows. In each of the low-swell and high-swell fingers, a core and a swelling zone are developed while a finger is growing. Based on suction measurements inside them, it is found that the water condition in the finger core changes from wetting to drying processes while the water condition in the swelling zone remains in the wetting process. This hysteretic behavior in the core can be explained by the moisture distribution changing along a finger from tip to tail. Fingers swell when water moves from a finger core to surrounding dry sand. Such a swelling process is mainly controlled by the hydraulic conductivity for the wetting process at a finger tail.
  English, Scientific journal
  DOI ID：10.3208/sandf.39.4_79, ISSN：1341-7452, CiNii Articles ID：110003945709, CiNii Books ID：AN10496056, 共同研究・競争的資金等ID：44511243
• 美唄泥炭地の持続的農業生産と土壌・水文・大気ダイナミックス －物質移動をフィールドサイエンスにみる－　　　　　　　　　　　　　　　
  宮崎毅; 中野政詩; 梅田安治; 粕渕辰昭; 伊藤純雄; 西村拓; 塩沢昌; 前村庸之; 川本健; 斎藤広隆; 神谷貴文; 飯山一平; 井本博美
  Volume：41, Number：3, First page：27, Last page：40, 1997, [Reviewed]
  Japanese, Scientific journal
  ISSN：0039-4858, CiNii Articles ID：120005773272, CiNii Books ID：AN00125003
• Leaching Efficiency Depending on the Type of Fingering Flow in Sandy Soils　　　　　　　　　　　　　　　
  KAWAMOTO Ken; MIYAZAKI Tsuyoshi; NAKANO Masashi
  Transactions of The Japanese Society of Irrigation, Drainage and Rural Engineering, Volume：64, Number：186, First page：89, Last page：96, 1996, [Reviewed], [Lead, Corresponding]
  Features of finger flows in fine sand and quartz sand were investigated experimentally and the effect of types of finger flows on the leaching characteristics were analyzed. The average particle size of fine sand was 0.18mm and that of quartz sand was 0.64mm. Salt was mixed uniformly as far as possible in the amount of 1.65g per 100g air-dry sand. Three different initial water content (air-dry, 1%, 2%) and two different rainfall flux (30 mm/h, 180 mm/h) were applied as the experimental conditions. Transducerized tensiometers were installed in the sand through the panel by which the changes of suction within fingers were measured.
  The results show that the shapes of wetting fronts were classified into four types, low-swell finger, high-swell finger, wavy front, and plane front. The values of suction gradients inside low-swell fingers were almost 0, suggesting that water movement inside them were mainly conducted by gravimetrical gradients. The changes of suction in low-swell fingers and in high-swell fingers were remarkably different. These differences were attributed to the differences of water content distributions within these two types of fingers.
  Leaching characteristics of sands were significantly influenced by the types of wetting fronts. Especially in the air-dry conditions, where low-swell fingers were generated, their leaching efficiencies were very small (20%-67%) compared with those of other types.
  The Japanese Society of Irrigation, Drainage and Rural Engineering, Japanese, Scientific journal
  DOI：https://doi.org/10.11408/jsidre1965.1996.981
  DOI ID：10.11408/jsidre1965.1996.981, ISSN：0387-2335, CiNii Articles ID：10016223879, CiNii Books ID：AN00201203

• Effect of Soil-Water Retention Hysteresis on Gas and Heat Transport Parameters　　　　　　　　　　　　　　　
  濱本 昌一郎; 川本 健; 小松 登志子
  CACS FORUM, Number：3, First page：6, Last page：11, 2012
  Knowledge of soil-gas and heat transport parameters is essential for simulating behaviors of greenhouse/toxic gases and changes in soil temperature in natural and man-made soil ecosystems, for example in urban polluted soil sites and the soil cover layer at municipal landfill sites. Degree of water-saturation at different water potentials (as described by the soil-water retention curve) highly affects both gas and heat transport parameters. In this study, the effects of water retention hysteresis (non-singularity in the wetting and drainage curves of soil-water retention) on the soil-gas diffusion coefficient (Dp), air permeability (ka), and thermal conductivity (K) were investigated. Different sand size fractions representing different particle shapes were used for measuring gas and heat transport parameters. Soil-water retention hysteresis highly affected the gas transport parameters, showing higher Dp and ka values for the wetting processes than those for drying processes at the same air content. This suggests that the existence of more continuous pore-networks for the wetting processes enhanced diffusive and advective gas transport. Opposite to the behavior of the gas transport parameters, the effect of soil water retention hysteresis on K was insignificant for all sand materials.
  Japanese
  CiNii Articles ID：120005254400, CiNii Books ID：AA12504266
• Gas Diffusion Coefficient in Unsaturated Peat Soil : Measurements, Development and Tests of Predictive Models
  川本 健; 海野 将孝; 飯塚 健仁; 小松 登志子
  Volume：42, First page：19, Last page：24, 2008
  The soil-gas diffusion coefficient (Dp) and its dependency on air-filled porosity (ε) govern the gas diffusion and reaction processes in soil. Accurate Dp(ε) prediction models for unsaturated saturated peat soils are needed to evaluate vadose zone transport and fate of greenhouse gases such as methane in peaty wetlands. In this study, we measured Dp on peat soil samples at different pF conditions, and developed new expressions for describing and predicting Dp(ε). Undisturbed peat soil samples were taken from Bibai wetland, Hokkaido, Japan. By modifying existing Dp(ε) models, the Buckingham model and the Macroporosity-Dependent model, we suggested two new Dp(ε) models for peat soils. To validate the new Dp(ε) models, we tested the models against independent datasets for peat soil samples from literatures. The modified Buckingham type model performed the best against independent datasets.
  Japanese
  CiNii Articles ID：120005373729
• Numerical Analysis of Colloid Leaching from Volcanic Ash Soil Columns
  MOLDRUP Per
  Volume：40, First page：28, Last page：35, 2006
  Transport of pesticides, heavy metal, radionuclide, and other strongly sorbing contaminants in soils is enhanced by colloid-facilitated transport. In order to understand colloid transport in soil, we first characterized coagulation/dispersion properties of colloidal solutions extracted from volcanic ash soil. Next, we investigated mobilization and leaching of colloidal materials from soil columns during rainfall irrigation. The coagulation/dispersion properties greatly varied with pH in colloidal solutions, causing change in particle size distributions with time. The leaching of colloids was numerically simulated using a new colloid transport model considering both equilibrium and kinetic sorption sites for colloids. HYDRUS-1D was used for the numerical simulation and estimation for transport parameters of colloids. The estimated distribution coefficient of natural colloids (which leached under application of artificial rainwater) was an order of magnitude larger than that of applied colloidal solution. The estimated detachment coefficient of natural colloids was three to four orders of magnitude greater than that of applied colloidal solution.
  Japanese
  CiNii Articles ID：120001370459

• Circular Economy and Waste Valorisation: Theory and Practice from an International Perspective　　　　　　　　　　　　　　　
  Giang, N.H.; T.T.V. Nga; T.T. Kien; N.H.Tan; K. Kawamoto, [Contributor]
  Aug. 2022
  共同研究・競争的資金等ID：44511245
• Bifurcation and Localisation Theory in Geomechanics　　　　　　　　　　　　　　　
  Oda, M.; K. Suzuki; K. Kawamoto; K. Iwashita; S. Takahashi; H. Fujimori, [Contributor]
  2021
• 土壌物理実験書　　　　　　　　　　　　　　　
  川本健, [Contributor]
  2011
• 改訂七版 農業農村工学ハンドブック　　　　　　　　　　　　　　　
  川本健, [Contributor]
  2010
• 水再生利用学 －持続可能社会を支える水マネジメント　　　　　　　　　　　　　　　
  濱本昌一郎; 川本健; 小松登志子, [Joint translation]
  2010

• 科学技術外交の推進：持続可能なゼロエミッション社会形成の実現に向けて　　　　　　　　　　　　　　　
  川本 健
  Dec. 2024
  Dec. 2024 - Dec. 2024, Japanese, Public discourse
• Assessment of arsenic adsorption performance using calcinated laterite grains in fixed-bed column experiments for the water treatment　　　　　　　　　　　　　　　
  Bandara; I.M.N.N.; K. Nakamura; A. Matsuno; K. Kawamoto
  Nov. 2024
  Nov. 2024 - Nov. 2024, English, Oral presentation
• 顆粒状軽量気泡コンクリート(AAC)を混合した透水性舗装ブロックの蒸発性評価　　　　　　　　　　　　　　　
  坂井 優太; 中村 謙吾; 松野 晃大; 川本 健
  Nov. 2024
  Nov. 2024 - Nov. 2024, Japanese, Oral presentation
• ベトナム顆粒状ラテライトのヒ素吸脱着量にpHが及ぼす影響　　　　　　　　　　　　　　　
  藤﨑 鉄心; 中村 謙吾; 松野 晃大; 川本 健
  Nov. 2024
  Nov. 2024 - Nov. 2024, Japanese, Oral presentation
• Assessing the adaptability of urban water management through wetland-inspired filtration techniques: A review　　　　　　　　　　　　　　　
  Wijewardana, Y.N.S.; P. Gajanayake; L.W. Galagedara; K. Kawamoto
  The International Conference on Biomimicry for Sustainability (ICBS 2024), Aug. 2024
  Aug. 2024 - Aug. 2024, English, Oral presentation
• Removal of arsenic contaminated water by continuous column adoption using laterite grains as a low-cost adsorbent　　　　　　　　　　　　　　　
  Indraji Madhushan; Nayaka Bandara; I.M.N.; A. Matsuno; K. Nakamura; K. Kawamoto
  The 10th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS2024), Jun. 2024
  Jun. 2024 - Jun. 2024, English, Oral presentation
• International technical cooperation project of construction and demolition waste (CDW) management and recycling in Vietnam　　　　　　　　　　　　　　　
  Kawamoto, K.
  The 10th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS2024), Jun. 2024, [Invited]
  Jun. 2024 - Jun. 2024, English, Keynote oral presentation
• ラテライト・熱処理ラテライトのヒ素吸着性の評価 ―バッチ試験・カラム試験から想定される試験方法による吸着性の違い―　　　　　　　　　　　　　　　
  中村 謙吾; 柳澤 龍太郎; N. Bandara; 松野 晃大; 川本 健
  Jun. 2024
  Jun. 2024 - Jun. 2024, Japanese, Poster presentation
• Establishment of mutual technology for ground improvement and insolubilization of heavy metals by mixing Vietnamese coal ash and mud　　　　　　　　　　　　　　　
  Komori, I.; S. Uddin; A. Matsuno; K. Nakamura; K. Kawamoto
  Japanese Geoscience Union Meeting 2024, May 2024
  May 2024 - May 2024, English, Oral presentation
• Evaluation of pH-dependent on arsenic adsorption and desorption process of laterite　　　　　　　　　　　　　　　
  Fujisaki, T.; K. Nakamura; K. Kawamoto; A. Matsuno
  Japanese Geoscience Union Meeting 2024, May 2024
  May 2024 - May 2024, English, Oral presentation
• Comparative evaluation of evaporation efficiency of permeable pavement blocks made from recycled concrete and autoclaved aerated concrete at different design porosity　　　　　　　　　　　　　　　
  Sakai, Y.; S. Yanagisawa; A. Matsuno; K. Nakamura; K. Kawamoto
  Japanese Geoscience Union Meeting 2024, May 2024
  May 2024 - May 2024, English, Oral presentation
• Evaluation of Adsorption performance of laterite soil for removal of arsenic from contaminated water bodies　　　　　　　　　　　　　　　
  Bandara; N.B.I.M.N.; R. Yanagisawa; A. Matsuno; K. Nakamura; K. Kawamoto
  Japanese Geoscience Union Meeting 2024, May 2024
  May 2024 - May 2024, English, Oral presentation
• Thermal conductivity of recycled concrete aggregates blended with autoclaved aerated concrete grains　　　　　　　　　　　　　　　
  Pham, V.N.; A. Matsuno; K. Nakamura; K. Kawamoto
  Japanese Geoscience Union Meeting 2024, May 2024
  May 2024 - May 2024, English, Oral presentation
• 荒川低地における原位置長期熱負荷・自然放冷試験中の浅層地下水の水質変化—Change in shallow groundwater quality during in-situ, long-term heating and natural cooling in Arakawa Lowland　　　　　　　　　　　　　　　
  杉江 瞭; 斎藤 健志; 川本 健; 小松 登志子
  Nov. 2017
  Nov. 2017 - Nov. 2017, Japanese
• 埋立地最終覆土における降雨時のガス及び水移動　　　　　　　　　　　　　　　
  伊豆本聡; 濱本昌一郎; 井本博美; 川本健; 長森正尚; 西村拓
  2017
  2017 - 2017
• 堆積環境の異なる地下帯水層における温度変化と水質変化の関係—Relationships between changes in subsurface temperature and groundwater quality in two confined aquifers with different sedimentary facies　　　　　　　　　　　　　　　
  斎藤 健志; 上島 雅人; 川本 健; 小松 登志子
  Jun. 2016
  Jun. 2016 - Jun. 2016, Japanese
• 降雨中の浸潤に伴う土中空気圧変化とメタンガス噴出　　　　　　　　　　　　　　　
  伊豆本聡; 濱本昌一郎; 井本博美; 川本健; 西村拓
  2016
  2016 - 2016
• 温度変化が飽和多孔質体中の溶質移動特性に与える影響　　　　　　　　　　　　　　　
  有原萌恵; 濱本昌一郎; 川本健; 小松登志子
  2014
  2014 - 2014
• 不飽和土壌の溶質・ガス拡散係数の統合的予測モデルの構築　　　　　　　　　　　　　　　
  濱本昌一郎; 川本健; 小松登志子; MOLDRUP Per
  2014
  2014 - 2014
• 地下水温変化が地下水質に与える影響　　　　　　　　　　　　　　　
  植木崇; 立石佳祐; 斉藤健志; 濱本昌一郎; 川本健; 小松登志子
  2013
  2013 - 2013
• 粒子形状・粒径・締固め度の違いが土壌の間隙構造および物質輸送係数に与える影響　　　　　　　　　　　　　　　
  小池拓也; 濱本昌一郎; 川本健; 小松登志子; 榊利博
  2013
  2013 - 2013
• 温度変化が地盤内の溶質分散特性に与える影響　　　　　　　　　　　　　　　
  有原萌恵; 濱本昌一郎; 濱本昌一郎; 川本健; 川本健; 小松登志子; 小松登志子
  2013
  2013 - 2013
• 異なる砂試料を用いたマイクロフォーカスX線CTによる間隙構造解析及び物質移動係数測定　　　　　　　　　　　　　　　
  小池拓也; 濱本昌一郎; 川本健; 小松登志子; 榊利博
  2013
  2013 - 2013
• 砂質土の土壌水分ヒステリシスがガス・熱輸送係数に及ぼす影響　　　　　　　　　　　　　　　
  濱本昌一郎; 笹沼久美; 川本健; 榊利博; 小松登志子
  2013
  2013 - 2013
• 二次圧密時の温度変化が粘土の圧密特性およびせん断剛性に与える影響　　　　　　　　　　　　　　　
  新屋陽理; MON Ei Ei; 濱本昌一郎; 川本健; 小松登志子
  2013
  2013 - 2013
• 地盤内の溶質分散特性の温度依存性に関する研究　　　　　　　　　　　　　　　
  有原萌恵; 濱本昌一郎; 川本健; 小松登志子
  2013
  2013 - 2013
• 温度変化が間隙水組成および土壌中重金属の存在形態に与える影響　　　　　　　　　　　　　　　
  栗原由衣; 濱本昌一郎; 濱本昌一郎; 川本健; 川本健; 小松登志子; 小松登志子
  2013
  2013 - 2013
• 美唄湿地の水・熱循環機構解明のためのシミュレーションおよび評価　　　　　　　　　　　　　　　
  稲葉薫; 川本健; 齊藤広隆; 濱本昌一郎; 小松登志子; 永田修
  日本地下水学会講演会講演要旨, 2013
  2013 - 2013, Japanese
• 単粒・団粒構造を有する土壌の熱伝導特性:粒径および形状による影響　　　　　　　　　　　　　　　
  鴨志田剛久; 濱本昌一郎; 濱本昌一郎; 川本健; 川本健; 榊利博; 小松登志子; 小松登志子
  2012
  2012 - 2012
• 土壌撥水性曲線のモデル化と撥水性パラメータの評価　　　　　　　　　　　　　　　
  黒田卓也; SHAPHAL Subedi; 川本健; 平館俊太郎; MUEELLER Karin; 濱本昌一郎; 小松登志子
  2012
  2012 - 2012
• 排水・吸水過程における不飽和砂質土のガス輸送係数　　　　　　　　　　　　　　　
  笹沼公美; 濱本昌一郎; 川本健; 榊利博; 小松登志子
  2012
  2012 - 2012
• 砂の熱特性:土粒子の粒径・形状及び石英含有率による影響　　　　　　　　　　　　　　　
  鴨志田剛久; 濱本昌一郎; 川本健; 榊利博; 小松登志子
  2012
  2012 - 2012
• 美唄湿地の水・熱循環機構解明のためのシミュレーション　　　　　　　　　　　　　　　
  稲葉薫; 川本健; 齊藤広隆; 濱本昌一郎; 小松登志子; 永田修
  日本地下水学会講演会講演要旨, 2012
  2012 - 2012, Japanese
• 廃棄物処分場覆土におけるガス成分の分散特性　　　　　　　　　　　　　　　
  濱本昌一郎; 濱本昌一郎; 平野貴大; 川本健; 川本健; 小松登志子; 小松登志子
  2011
  2011 - 2011
• 異なる形状および粒径サイズを有する砂の熱移動に関する研究　　　　　　　　　　　　　　　
  鴨志田剛久; 濱本昌一郎; 川本健; 小松登志子
  2010
  2010 - 2010
• 地盤内の物質・熱輸送係数の統合的予測式を用した処分場最終覆土層内のガス・熱輸送解析　　　　　　　　　　　　　　　
  濱本昌一郎; 川本健; 小松登志子; MOLDRUP Per
  2010
  2010 - 2010
• 国内土壌の透気係数測定と予測式の提案　　　　　　　　　　　　　　　
  杉本雄一; 濱本昌一郎; 飯塚健仁; 川本健; 小松登志子
  2009
  2009 - 2009
• 美唄湿地の水・熱循環機構解明のための基礎的数値モデルの構築　　　　　　　　　　　　　　　
  稲葉薫; 川本健; 齊藤広隆; 長谷川周一; 永田修
  日本地下水学会講演会講演要旨, 2009
  2009 - 2009, Japanese
• Direct determination of water-table depths using multiple offset GPR profiling data in peatland　　　　　　　　　　　　　　　
  2009
• Direct determination of water-table depths using multiple offset GPR profiling data in peatland　　　　　　　　　　　　　　　
  The Proceedings of 9th International Symposium for Environmental Issues in Korea and Japan, 2009
• 泥炭林土壌の温室効果ガスの濃度変化と放出　　　　　　　　　　　　　　　
  森本聡; 永田修; 川本健; 長谷川周一
  日本土壌肥料学会講演要旨集, Sep. 2008
  Sep. 2008 - Sep. 2008, Japanese
• 一次元カラム実験装置を用いた土壌ガス分散係数の測定　　　　　　　　　　　　　　　
  濱本昌一郎; 川本健; 小松登志子
  2008
  2008 - 2008
• 原位置試験を用いた土壌透気係数の評価　　　　　　　　　　　　　　　
  杉本雄一; 濱本昌一郎; 川本健; 小松登志子
  2008
  2008 - 2008
• Gas dispersivity in sand and aggregate soil　　　　　　　　　　　　　　　
  濱本昌一郎; 川本健; 小松登志子
  土壌物理学会講演要旨集, 2008
  2008 - 2008
• Characterizing soil water repellency properties by soil organic carbon content, soil texture and sieved-size fractions　　　　　　　　　　　　　　　
  2008
  2008 - 2008
• The effect of soil compaction on solute diffusion in volcanic ash soil　　　　　　　　　　　　　　　
  2008
  2008 - 2008, Poster presentation
• Transport and straining of colloid-sized materials in saturated porous media　　　　　　　　　　　　　　　
  2008
  2008 - 2008, Poster presentation
• 泥炭林土壌でのCO₂・CH₄の生成と放出　　　　　　　　　　　　　　　
  森本聡; 長谷川周一; 永田修; 川本健
  農業農村工学会北海道支部研究発表会講演集, 2008
  2008 - 2008, Japanese
• Gas diffusion coefficient in variably saturated peat soil: Development and tests of predictive models　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Three-dimensional pore structure analysis for peat materials using microfocus X-ray computed tomography　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Irreversibility of 2,4-dichlorophenoxyacetic acid sorption onto a volcanic ash soil : Effect of pH　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Single- and two-individual-region models for gas diffusivity in structureless or aggregated, unsaturated soil　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Development of a predictive expression for soil water repellency based on soil organic carbon content　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Simultaneous measurements of the soil-gas dispersion coefficient, gas permeability, and gas diffusivity in repacked, structureless and aggregated soils　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Transport and straining of colloid-sized materials in saturated porous media: Experimental and numerical analysis　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Measurement of gas transport parameters for peat soils: Effect of volume shrinkage with successive drainage　　　　　　　　　　　　　　　
  2008
• Spatial variability and scale dependency of soil-air permeability at waste disposal landfill site and natural field　　　　　　　　　　　　　　　
  2008
• Sorption and desorption behavior of 2,4-dichlorophenoxyacetic acid in kaolinite, volcanic ash soil and water dispersible colloid　　　　　　　　　　　　　　　
  2008
• Measurements of the soil-gas dispersion coefficient, gas permeability, and gas diffusivity in repacked structureless and aggregated soils: Effect of soil structure, particle size and column scale　　　　　　　　　　　　　　　
  2008
• Scale dependency of gas transport parameters in undisturbed soils　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Comparison of solute diffusivity between volcanic ash soils and normal mineral soils　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Measurements of gas phase convection and dispersion parameters in soil　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Experimental and numerical analysis of colloid transport and straining in saturated sand　　　　　　　　　　　　　　　
  2008
• Gas transport parameters for peat soils at near saturated condition　　　　　　　　　　　　　　　
  2008
• Spatial variability and scale dependency of soil-air permeability in a landfill soil cover and three natural field soils　　　　　　　　　　　　　　　
  2008
• Emerging aspects of soil hydrology: Soil water repellency, fingered flow, and high resolution measurement methods　　　　　　　　　　　　　　　
  2008
• Development of a predictive expression for soil water repellency curve based on soil organic carbon content　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Measurements of distribution coefficients for pesticide onto soil and colloidal materials　　　　　　　　　　　　　　　
  2008
• Transport and retention of colloid-sized materials in saturated porous media: Experimental and numerical analysis　　　　　　　　　　　　　　　
  2008
  Poster presentation
• Gas diffusion coefficient in variably saturated peat soil: Development and tests of predictive models　　　　　　　　　　　　　　　
  American Geophysical Union Fall Meeting 2008, 2008
  Poster presentation
• Three-dimensional pore structure analysis for peat materials using microfocus X-ray computed tomography　　　　　　　　　　　　　　　
  American Geophysical Union Fall Meeting 2008, 2008
  Poster presentation
• Irreversibility of 2,4-dichlorophenoxyacetic acid sorption onto a volcanic ash soil : Effect of pH　　　　　　　　　　　　　　　
  American Geophysical Union Fall Meeting 2008, 2008
  Poster presentation
• Single- and two-individual-region models for gas diffusivity in structureless or aggregated, unsaturated soil　　　　　　　　　　　　　　　
  S-1 Division, 2008 ASA-CSSA-SSSA International Annual Meetings, 2008
  Poster presentation
• Development of a predictive expression for soil water repellency based on soil organic carbon content　　　　　　　　　　　　　　　
  S-1 Division, 2008 ASA-CSSA-SSSA International Annual Meetings, 2008
  Poster presentation
• Simultaneous measurements of the soil-gas dispersion coefficient, gas permeability, and gas diffusivity in repacked, structureless and aggregated soils　　　　　　　　　　　　　　　
  S-1 Division, 2008 ASA-CSSA-SSSA International Annual Meetings, 2008
  Poster presentation
• Transport and straining of colloid-sized materials in saturated porous media: Experimental and numerical analysis　　　　　　　　　　　　　　　
  S-1 Division, 2008 ASA-CSSA-SSSA International Annual Meetings, 2008
  Poster presentation
• Measurement of gas transport parameters for peat soils: Effect of volume shrinkage with successive drainage　　　　　　　　　　　　　　　
  International Symposium on Environmental Management: Hazardous-Environmental Management Toward Sustainability (iSEM 2008), 2008
• Spatial variability and scale dependency of soil-air permeability at waste disposal landfill site and natural field　　　　　　　　　　　　　　　
  International Symposium on Environmental Management: Hazardous-Environmental Management Toward Sustainability (iSEM 2008), 2008
• Sorption and desorption behavior of 2,4-dichlorophenoxyacetic acid in kaolinite, volcanic ash soil and water dispersible colloid　　　　　　　　　　　　　　　
  International Symposium on Environmental Management: Hazardous-Environmental Management Toward Sustainability (iSEM 2008), 2008
• Measurements of the soil-gas dispersion coefficient, gas permeability, and gas diffusivity in repacked structureless and aggregated soils: Effect of soil structure, particle size and column scale　　　　　　　　　　　　　　　
  International Symposium on Environmental Management: Hazardous-Environmental Management Toward Sustainability (iSEM 2008), 2008
• Scale dependency of gas transport parameters in undisturbed soils　　　　　　　　　　　　　　　
  Japanese Geoscience Union Meeting 2008, 2008
  Poster presentation
• Comparison of solute diffusivity between volcanic ash soils and normal mineral soils　　　　　　　　　　　　　　　
  Japanese Geoscience Union Meeting 2008, 2008
  Poster presentation
• Measurements of gas phase convection and dispersion parameters in soil　　　　　　　　　　　　　　　
  Japanese Geoscience Union Meeting 2008, 2008
  Poster presentation
• Experimental and numerical analysis of colloid transport and straining in saturated sand　　　　　　　　　　　　　　　
  Japanese Geoscience Union Meeting 2008, 2008
• Gas transport parameters for peat soils at near saturated condition　　　　　　　　　　　　　　　
  Proceedings of the International Exchange Symposium on Sustainable Infrastructure Development in Asia, 2008
• Spatial variability and scale dependency of soil-air permeability in a landfill soil cover and three natural field soils　　　　　　　　　　　　　　　
  Proceedings of the International Exchange Symposium on Sustainable Infrastructure Development in Asia, 2008
• Emerging aspects of soil hydrology: Soil water repellency, fingered flow, and high resolution measurement methods　　　　　　　　　　　　　　　
  Proceedings of the International Exchange Symposium on Sustainable Infrastructure Development in Asia, 2008
• Development of a predictive expression for soil water repellency curve based on soil organic carbon content　　　　　　　　　　　　　　　
  Proceedings on the Third HYDRUS Workshop, 2008
  Poster presentation
• Measurements of distribution coefficients for pesticide onto soil and colloidal materials　　　　　　　　　　　　　　　
  Proceedings of the International Exchange Symposium on Sustainable Infrastructure Development in Asia, 2008
• Transport and retention of colloid-sized materials in saturated porous media: Experimental and numerical analysis　　　　　　　　　　　　　　　
  Proceedings on the Third HYDRUS Workshop, 2008
  Poster presentation
• Effects of soil structure and particle size on soil gas diffusivity　　　　　　　　　　　　　　　
  杉本雄一; 濱本昌一郎; 長谷川久展; 川本健; 小松登志子
  土壌物理学会講演要旨集, 2007
  2007 - 2007
• Capillary bundle model for predicting gas transport parameters in sand with artificial macropores　　　　　　　　　　　　　　　
  濱本昌一郎; 川本健; 小松登志子
  土壌物理学会講演要旨集, 2007
  2007 - 2007
• Modeling of laterally expanding fingering flow in sandy soils　　　　　　　　　　　　　　　
  2003
• Modeling of laterally expanding fingering flow in sandy soils　　　　　　　　　　　　　　　
  Proceedings of the 2nd Asian Conference on Unsaturated Soils, UNSAT-ASIA 2003, 2003
• Micro-structural change during shearing and its contribution to the re-liquefaction phenomena of saturated granular soils under cyclic loading　　　　　　　　　　　　　　　
  2001
• Micro-structural change during shearing and its contribution to the re-liquefaction phenomena of saturated granular soils under cyclic loading　　　　　　　　　　　　　　　
  5th International Workshop on Bifurcation and Localisation Theory in Geomechanics, The, 2001
• フィンガー流の形態による塩分溶脱効果の相違　　　　　　　　　　　　　　　
  川本健; 宮崎毅; 中野政詩
  農業土木学会論文集, 1996
  1996 - 1996

• Apr. 2016 - Present
  Environmental Geotechnical Engineering, Saitama University, Postgraduate courses
• 2013 - Present
  Geoenvironmental Engineering, Saitama University, Undergraduate special subjects
• 2007 - Present
  Advanced Geoenvironmental Engineering (E), Saitama University, Postgraduate courses
• 2007 - 2012
  Geotechnical Engineering I, Saitama University, Undergraduate special subjects

• American Geophysical Union

• ベトナムにおける廃棄物処分場環境汚染防止のための適正技術開発　　　　　　　　　　　　　　　
  Feb. 2025 - Feb. 2025
  Principal investigator
  Grant amount(Total)：1528540
• ベトナムにおける重金属含有泥土の地盤改良・浄化に向けた石炭灰有効利用　　　　　　　　　　　　　　　
  Apr. 2022 - Mar. 2024
  Principal investigator
  Grant amount(Total)：5000000
• ベトナムにおける建設廃棄物の適正管理と建廃リサイクル資材を活用した環境浄化及びインフラ整備技術の開発　　　　　　　　　　　　　　　
  2017 - 2024
  Principal investigator
  論文ID：49522070, 書籍等出版物ID：49539139, 受賞ID：49140852, 社会貢献活動ID：49528046, メディア報道ID：49527087
• Mass transport parameter models for bentonite based on the microstructural analysis　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 01 Apr. 2017 - 31 Mar. 2020
  Kawamoto Ken, Saitama University
  Grant amount(Total)：17680000, Direct funding：13600000, Indirect funding：4080000
  Bentonite can be expected as a filling material between the canister of radioactive waste and surrounding underground geological deposit in the engineering barrier system. In this study, two kinds of bentonite materials such as granular bentonite under different humidity and packed conditions and block bentonite were used to characterize the microstructure using a microfocus X-ray CT system and to evaluate mass transport parameters for developing predictive models. Results showed that the homogeneous process of bentonite was quantified based on the temporal change in the ratio of coarse and fine grains, and both gas diffusion coefficient and air permeability of granular bentonite were evaluated well by using the predictive models considering effective air-filled porosity. These results can be expected to incorporate with the mass transfer dynamics of filling materials and to contribute to the evaluation of long-term safety of engineering barrier system.
  Grant number：17H03301
  論文ID：49528747
• Heat transfer phenomena and its suitable boundary conditions of geomaterials under cooling and heating process　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (A), 01 Apr. 2014 - 31 Mar. 2019
  Yamabe Tadashi, Saitama University
  Grant amount(Total)：30680000, Direct funding：23600000, Indirect funding：7080000
  To investigate the heat transfer characteristics of sand stone due to cooling and heating process, cylinder of 50mm diameter and sphere of 50mm and 100mm diameter were used as the samples. Two types of boundary conditions had been used for the derivation of exact solutions of the governing equations. They were Dirichlet boundary (DB) and heat transfer boundary (HTB) conditions. Hence, comparison had been made on these two boundary conditions to identify their suitability on heat transfer characteristics. The results show that the exact solutions derived using HTB has been fitted better than DB for both cooling and heating phenomenon in cylinders as well as in spheres.
  Grant number：26249068
• スリランカ廃棄物処分場における地域特性を活かした汚染防止と修復技術の構築　　　　　　　　　　　　　　　
  2010 - 2015
  論文ID：49528657, 受賞ID：49141671
• Modeling Gas Transport in Soils and its Application to the Environmental Risk Assessment　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 2006 - 2008
  KOMATSU Toshiko; KAWAMOTO Ken; HASEGAWA Syuichi; MIZOGUCHI Masaru; MOLDRUP PER; ROLSTON Dennis E., Saitama University
  Grant amount(Total)：15150000, Direct funding：14100000, Indirect funding：1050000
  Grant number：18360224
  論文ID：24337889
• Fate and Transport of Colloid-Facilitated Contaminants in Soil　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Young Scientists (A), 2006 - 2008
  KAWAMOTO Ken; SAITO Hirotaka; MOLDRUP Per; KOMATSU Toshiko, Saitama University
  Grant amount(Total)：19110000, Direct funding：14700000, Indirect funding：4410000
  Grant number：18686039
• Fundamental study on transition from quasi-static to rapid flow of granular materials　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 2004 - 2006
  ODA Masanobu; IWASHITA Kazuyoshi; KISHINO Yuji; SUZUKI Kiichi; KAZAMA Hidehiko, Saitama University
  Grant amount(Total)：11500000, Direct funding：11500000
  Soil-related structures such as embankments and retaining walls are usually designed on stability analysis. To analyze the stability, soil engineers need a failure criterion of soils, and have done a lot of research works for it. However, failure of soil-related structures is repeated every year, and flowing soil debris causes a huge damage to the civil engineering structures and human lives. This fact implies that not only the failure criterions but also the flowing behavior after failure are very important to reduce such damage. Soil movement starts as quasi-static flow along a shear band, and the speed increases, as called rapid flow, if a certain condition (not understood yet) is satisfied. In order to understand the transition behavior from quasi-static to rapid flow, laboratory tests and numerical simulation tests are carried out, with special interest in the microscopic aspect of flow mechanism during quasi-static and rapid flow. The conclusion are summarized as follows:
  1)Two-dimensional flow of particle assembly is generated in a rotary shear cell, and individual particles are chased by means of high-speed camera and image analysis. Micro-behaviors of granular flow such as particle rotation, granular temperature, collision angle and velocity gradient profile are investigated to obtain a criterion distinguishing between quasi-static and rapid flow from a microscopic point of view.
  2)Three-dimensional micro-structure in a quasi-static flow domain is observed by means of micro-focus X-ray computed tomography. Based on the results, a new dilatancy model in a shear zone is proposed under strong support from numerical simulation of Distinct Element Method (DEM). A new methodology for quantitative representation of micro-structure is also proposed.
  3)DEM is applied to simulate numerically transition from quasi-static to rapid flow, and the results are compared with the ones of laboratory tests. It is found that DEM provides a reliable tool to simulate of whole range from quasi-static to rapid granular flow of granular materials. DEM is expanded, with success, so that the effect of water on granular flow can be taken into account.
  Grant number：16360233
• 選択流の形態による水・コロイド・汚染物質同時輸送機構の解明　　　　　　　　　　　　　　　
  2005 - 2005
  Grant amount(Total)：3000000, Direct funding：3000000
  Grant number：17760386
  論文ID：27643536
• 森林土壌における選択的水みちを考慮した水移動に関する研究　　　　　　　　　　　　　　　
  2002 - 2003
  Grant amount(Total)：2800000, Direct funding：2800000
  Grant number：14750410
  論文ID：24337884, 受賞ID：49141607
• Experimental study on liquefaction mechanism by means of micro-mechanical method　　　　　　　　　　　　　　　
  Japan Society for the Promotion of Science, Grants-in-Aid for Scientific Research, Grant-in-Aid for Scientific Research (B), 2000 - 2002
  ODA Masanobu; NAKASE Hitoshi; IWASHITA Kazuyoshi; SUZUKI Kiichi; KAWAMOTO Ken; KAZAMA Hidehiko, Saitama University
  Grant amount(Total)：7800000, Direct funding：7800000
  Our research objectives are first to develop a program based on Distinct Element Method (DEM), which makes it possible to numerically simulate the liquefaction phenomenon ; second to figure out liquefaction mechanism from micro-mechanical point of view ; and finally, to verify experimentally the reality of numerical simulation results. We obtained the following results :
  1) DEM is programmed such that the interaction between particles and surrounding water can be taken into account. It can successfully be applied to liquefaction associated upward seepage flow.
  2) Numerical simulation tests were carried out using the distinct element method (DEM) by paying much attention to the micro-deformation mechanism during liquefaction of saturated granular materials. During the cyclic loading, column-like structures are generated in the corresponding direction of major principal stress. The microstructure becomes more anisotropic with cyclic loading. Not only decrease of effective stress but also anisotropy of the microstructure itself accelerate the anisotropy of microstructure. Such anisotropic structure becomes unstable and finally collapses when the major principal stress rotates.
  3) Undrained cyclic triaxial tests are carried out to clarify the effect of microstructure on liquefaction. Following facts are of particular interest. Voids, randomly distributed at first, are connected in series between the column-like structures. The excess pore water pressure increases markedly under undrained cyclic loading, in particular, when the connected voids are stressed perpendicular to their elongation direction. This is the reason why once liquefied sand loses sharply the liquefaction resistance in a subsequent re-liquefaction test.
  Grant number：12450187
  論文ID：24337875

• Editorial board member, Journal of Science and Technology in Civil Engineering (STCE)　　　　　　　　　　　　　　　
  Supervision, Peer review
  Hanoi University of Civil Engineering, Vietnam, 01 Jan. 2021 - Present
  Academic society etc
• The International Conference on Resource Efficiency Towards Sustainability (ICRES 2025)　　　　　　　　　　　　　　　
  Planning etc
  06 Mar. 2025 - 06 Mar. 2025
  Academic society etc
• Co-organizer, The 10th International Symposium on Advances in Civil and Environmental Engineering Practices for Sustainable Development (ACEPS2024)　　　　　　　　　　　　　　　
  Planning etc, Panel chair etc
  Ruhuna University, Sri Lanka and Saitama University, Japan, 27 Jun. 2024 - 27 Jun. 2024
  Competition etc
• 地下水・土壌汚染とその防止対策に関する研究集会 幹事　　　　　　　　　　　　　　　
  Planning etc, Peer review
  2008 - 2021
  Competition etc
• 第26回地下水・土壌汚染とその防止対策に関する研究集会 実行委員長　　　　　　　　　　　　　　　
  Planning etc
  2021
  Competition etc
• Soils and Foundations, Executive board member　　　　　　　　　　　　　　　
  Supervision, Peer review
  Apr. 2016 - Aug. 2019
  Academic society etc
• 関東支部委員 埼玉県グループ リーダー幹事　　　　　　　　　　　　　　　
  Planning etc
  2014 - 2019
  Academic society etc
• International Advisory Committee, Conference on Sri Lanka Japan Collaborative Research 2013 (SLJCR-2013)　　　　　　　　　　　　　　　
  Planning etc, Panel chair etc
  Mar. 2013
• 第18回地下水・土壌汚染とその防止対策に関する研究集会 幹事長　　　　　　　　　　　　　　　
  Planning etc
  2011
  Competition etc
• 調査研究部門 コンクリート委員会 コンクリート－地盤協会問題研究小委員会委員　　　　　　　　　　　　　　　
  Planning etc, Supervision
  Oct. 2008 - Jun. 2010
  Academic society etc
• JSPS Asia Africa Science Platform Program Joint seminar on “Innovative vegetation bio-engineering approaches for water quality improvement and disaster mitigation”, Committee Member　　　　　　　　　　　　　　　
  Planning etc
  May 2010
  Competition etc
• 論文集編集委員　　　　　　　　　　　　　　　
  Planning etc, Peer review
  01 Apr. 2007 - 31 Mar. 2010
  Peer review etc
• 関東支部委員 埼玉県グループ リーダー幹事　　　　　　　　　　　　　　　
  Planning etc
  May 2004 - Oct. 2009
  Academic society etc
• 論文集編集委員　　　　　　　　　　　　　　　
  Planning etc, Peer review
  Jun. 2004 - May 2008
  Academic society etc
• 国内委員会実行委員　　　　　　　　　　　　　　　
  Planning etc, Panel chair etc
  2008
  Competition etc
• 「土壌の物理性」100号記念準備委員会委員　　　　　　　　　　　　　　　
  Planning etc, Peer review
  Oct. 2004
  Academic society etc
• The Sixth International Summer Symposium Committee Member　　　　　　　　　　　　　　　
  Planning etc, Peer review
  Jul. 2004
  Academic society etc
• 「土と基礎」会誌部委員, 編集委員会 企画担当グループ主査　　　　　　　　　　　　　　　
  Planning etc, Peer review
  Jun. 2002 - Jun. 2004
  Academic society etc
• 「土と基礎」編集委員会 企画担当グループ委員　　　　　　　　　　　　　　　
  Planning etc, Peer review
  Jun. 2000 - Jun. 2001
  Academic society etc

• ダナン工科大学とJSTさくらサイエンスプログラムを実施しました　　　　　　　　　　　　　　　
  05 Mar. 2025, [Internet]