V.N.Q. Tram, H. Somura*, T. Moroizummi (2021): Evaluation of drought features in the Dakbla watershed, Central Highlands of Vietnam, Hydrological Research Letters, 15(3): 77-83. DOI: 10.3178/hrl.15.77. [Download]
O.S.Z. Nhassengo, H. Somura*, J. Wolfe (2021): Environmental flow sustainability in the Lower Limpopo River Basin, Mozambique, Journal of Hydrology: Regional Studies, 36:100843. DOI: 10.1016/j.ejrh.2021.100843. [Download]
V.N.Q. Tram, H. Somura*, T. Moroizummi (2021): The impacts of land-use input conditions on flow and sediment discharge in the Dakbla Watershed, Central Highlands of Vietnam, Water, 13(5):627. DOI: 10.3390/w13050627. [Download]
T. Kurozumi, Y. Mori, H. Somura, M. O-How (2020): Organic matter clogging results in undeveloped hardpan and soil mineral leakage in the rice terraces in the Philippine cordilleras, Water, 12(11):3158. DOI: 10.3390/w12113158. [Download]
T. Onishi, J. Yoshino, K. Hiramatsu, H. Somura (2020): Developing a hydro-chemical model of Ise Bay watersheds and the evaluation of climate change impacts on discharge and nitrate-nitrogen loads, Limnology, 21(3):465-486. DOI: 10.1007/s10201-020-00622-2. [Download]
R. D. Yustika, H. Somura*, S. B. Yuwono, T. Masunaga (2019): Impact of human activities and natural processes on the seasonal variability of river water quality in two watersheds in Lampung, Indonesia, Water, 11:2363. DOI: 10.3390/w11112363. [Download]
R. D. Yustika, H. Somura*, S. B. Yuwono, B. Arifin, H. Ismono, T. Masunaga (2019): Assessment of soil erosion in social forest-dominated watersheds in Lampung, Indonesia, Environmental Monitoring and Assessment, 191:726. DOI: 10.1007/s10661-019-7890-5. [Download]
J. Ide, I. Takeda, H. Somura, Y. Mori, Y. Sakuno, Y. Yone, E. Takahash (2019): Impacts of hydrological changes on nutrient transport from diffuse sources in a rural river basin, Western Japan, JGR Biogeosciences, 124 (8): 2565-2581. DOI: 10.1029/2018JG004513. [Download]
A. Jami, M. Tasumi, T.M. Mosier, H. Somura, T. Konishi (2019): Evaluation of the effects of climate change on field‑water demands using limited ground information: a case study in Balkh province, Afghanistan, Irrigation Science, 37 (5): 583-595. DOI: 10.1007/s00271-019-00638-2. [Download]
H. Somura, S.B. Yuwono, H. Ismono, B. Arifin, F. Fitriani, R. Kada (2019): Relationship between water quality variations and land use in the Batutegi Dam Watershed, Sekampung, Indonesia, Lakes & Reservoirs, 24 (1): 93-101. DOI: 10.1111/lre.12221. [Download]
H. Somura, H. Kunii, Y. Yone, I. Takeda, H. Sato (2018): Importance of considering nutrient loadings from small watersheds to a lake – A case study of the Lake Shinji watershed, Shimane Prefecture, Japan, International Journal of Agricultural and Biological Engineering, 11 (5): 124-130. DOI: 10.25165/j.ijabe.20181105.4351. [Full Text]
H. Somura, Darmawan, K. Sato, M. Ueno, Husnain, Aflizar, T. Masunaga (2016):Characteristics and potential usage of dissolved silica in rice cultivation in Sumani Watershed, Sumatra, Indonesia, Pertanika Journal of Tropical Agricultural Science, 39 (4): 601-615. [Full Text]
J. Ide, H. Somura, T. Nakamura, Y. Mori, I. Takeda, K. Nishida (2015):Hydrological effects on relationships between δ15N of river nitrate and land use in a rural river basin, western Japan, River Research and Applications, 31(5), 639-649. DOI: 10.1002/rra.2756. [Abstract]
H. Somura, T. Masunaga, Y. Mori, I. Takeda, J. Ide, H. Sato (2015):Estimation of nutrient input by a migratory bird, the Tundra Swan (Cygnus columbianus), to winter-flooded paddy fields, Agriculture, Ecosystems and Environment, 119, 1-9. DOI: 10.1016/j.agee.2014.07.018. [Abstract]
A. khater, Y. Kitamura, K. Shimizu, H. Somura, W. H. Abou El Hassan (2014):Improving water quality in the Nile Delta irrigation network by regulating reuse of agricultural drainage water, Food, Agriculture and Environment, 12 (3-4), 329-337.
H. Somura, I. Takeda, J. Arnold, Y. Mori, J. Jeong, N. Kannan, D. Hoffman (2012):Impact of suspended sediment and nutrient loading from land uses against water quality in the Hii River basin, Japan, Journal of Hydrology, 450-451, 25-35. DOI: 10.1016/j.jhydrol.2012.05.032. [Abstract]
T. Kato, H. Somura, H. Kuroda, H. Nakasone (2011):Simulation of nutrients from an agricultural watershed in Japan using the SWAT model, International Agricultural Engineering Journal, 20 (3), 40-49.
Aflizar, A. Saidi, Husnain, Ismawardi, Bambang Istijono, Harmailis, H. Somura, T. Wakatsuki, T. Masunaga (2010):A land use planning recommendation for the sumani watershed, West Sumatra, Indonesia, Tropics, 19 (1), 43-51.
Aflizar, A. Saidi, Husnain, R. Indra, Darmawan, Harmailis, H. Somura, T. Wakatsuki, T. Masunaga (2010):Soil erosion characterization in an agricultural watershed in west Sumatra, Indonesia, Tropics, 19 (1), 29-42.
I. Takeda, H. Somura, Y. Mori (2010):Recovery of phosphorus from natural water bodies using iron-oxidizing bacteria and woody biomass, Ecological Engineering, 36, 1064-1069.
I. Takeda, A. Fukushima, H. Somura (2009):Long-term trends in water quality in an under-populated watershed and influence of precipitation, Journal of Water and Environment Technology, 7 (4), 293-306.
H. Somura, I. Takeda, Y. Mori (2009):Sensitivity analyses of hydrologic and suspended sediment discharge in the Abashiri River Basin, Hokkaido Region, Japan, International Agricultural Engineering Journal, 18 (1-2), 27-39.
H. Somura, J. Arnold, D. Hoffman, I. Takeda, Y. Mori, M. Di Luzio (2009):Impact of climate change on the Hii River basin and salinity in Lake Shinji: a case study using the SWAT model and a regression curve, Hydrological Processes, 23 (13), 1887-1900. DOI: 10.1002/hyp.7321. [Abstract]
H. Somura, I. Takeda, Y. Mori (2009):Influence of puddling procedures on the quality of rice paddy drainage water, Agricultural Water Management, 96 (6), 1052-1058. DOI: 10.1016/j.agwat.2008.12.005. [Abstract]
H. Somura, A. Goto, H. Matsui, AM. Elhassan (2008):Impacts of nutrient management and decrease in paddy field area on groundwater nitrate concentration: a case study at the Nasunogahara alluvial fan, Tochigi prefecture, Japan, Hydrological Processes, 22 (24), 4752-4766. DOI: 10.1002/hyp.7089. [Abstract]
H. Somura, K. Yoshida, H. Tanji (2008):Decadal fluctuations in the consumption of irrigation water during the rainy season, Lower Mekong River, Hydrological Processes, 22 (9), 1310-1320. DOI: 10.1002/hyp.6940. [Abstract]
H. Somura, D. Nakayama, M. Aizaki, Y. Seike, M. Okumura, K. Nishikata (2008):Spatial distribution of water quality and load units in the Iinashi River basin, Shimane Prefecture, Japan, The Open Hydrology Journal, 2, 15-24. DOI: 10.2174/1874378100802010015. [Abstract]
K. Higuchi, O. Toda, K. Yoshida, H. Somura, H. Tanji (2007):Development of irrigation water allocation model considering gate operator density, in Northeast Thailand, 水文・水資源学会誌, 20 (3), 167-190.
H. Somura, H. Tanji, K. Yoshida, O. Toda, K. Higuchi (2005):Estimation of supplementary water to paddy fields in the Lower Mekong River basin during the dry season, Paddy and Water Environment, 3 (3), 177-186. DOI: 10.1007/s10333-005-0015-5. [Abstract]
H. Somura, H. Tanji, K. Yoshida, O. Toda, T. Masumoto (2005):Estimation of irrigated water to paddy fields under conditions of poor data availability, Cambodia, 水文・水資源学会誌, 18 (1), 22-34.
K. Yoshida, H. Tanji, H. Somura (2004):Stream temperature analysis in Nam Ngum River basin, Mekong, 水工学論文集, 48 (2), 1531-1535.
H. Somura, A. Goto, M. Mizutani (2003):Modeling Analysis of nitrate nitrogen pollution processes of groundwater in Nasunogahara Basin, 農業土木学会論文集, 226, 1-10.
T. Kato, H. Somura, A. Goto (2002):Water quality forecast of Cidanau watershed, Indonesia, for watershed management planning, Rural and Environmental Engineering, 43, 3-12.
K. Yoshida, H. Somura, K. Higuchi, O. Toda, H. Tanji (2005):Relation of corridor vegetation density and stream temperature, Dynamics and Biogeochemistry of River Corridors and Wetlands (Proceedings of symposium S4 held during the Seventh IAHS Scientific Assembly at Foz do Iguacu, Brazil, April 2005)., IAHS Publ. 294, 102-113. (ISSN 0144-7815-294)
H. Somura, S. Yuwono , R. Yustika (2021):How should we manage a watershed for sustainable water environment?, Japan Geoscience Union Meeting (JpGU) 2021, 30 May - 6 June, 2021 (online).
H. Somura (2019): Ecosystem-based disaster risk reduction in Japan - The traditional knowledge on water, 2019 International conference on social participation and co-management of natural resources for sustainable development (Calamba, Philippine), 17-22 June 2019.
S.B. Yuwono, H. Somura (2019): Land use changes, climate change and flood episodes in Lampung, 2019 International conference on social participation and co-management of natural resources for sustainable development (Calamba, Philippine), 17-22 June 2019.
H. Somura, S. Saboory, E. Rabanizada, T. M. Mosier (2019): Influence of climate change on water resource availability in a watershed, XXIX Geophysics days(Rovaniemi, Finland), 21-22 March 2019. (Poster presentation)
H. Somura (2018): Evaluation of water quality and soil nutrients in winter-flooded paddy fields, The second international scientific conference on sustainable agriculture and environment(Ho Chi Minh city, Vietnam), 13-15 December 2018.
H. Somura, SB. Yuwono (2018): Characteristic of water quality variations in the Batutegi Dam watershed, Sekampung, Indonesia, International workshop on "Community-oriented and watershed-based approach for harmonizing environmental conservation and regional economy"(Lampung, Indonesia), 20 September 2018.
H. Somura, T. Mori (2017):Influence of overwintering Tundra Swan against soil nutrients in winter-flooded paddy fields, AGU Fall Meeting (New Orleans, LA, USA), 11-15 December 2017. (Poster Presentation)
H. Somura, E. Rabanizada, S. Mohammad (2017):SWAT application for water resources management in Khulm watershed, Afghanistan, 2017 International SWAT Conference (Warsaw, Poland), 26-30 July 2017.
H. Somura (2016): Potential availability of feces from a migratory bird, Tundra Swan, in winter-flooded paddy fields. Myanmar-Japan International Symposium 2016 (Pathein, Myanmar), 2-4 December 2016.
H. Somura (2016): Relationship between water quality variations and land use in the Batutegi Dam watershed, Sekampung, Indonesia. The World Lake Conference 2016 (Bali, Indonesia), 7-10 November 2016.
H. Somura, Darmawan, K. Sato, M. Ueno, Husnain, Aflizar, T. Masunaga (2015):Spatial and temporal distributions of DSi in Sumani watershed, Indonesia, International Conference on Green Development in Tropical Regions, Padang & Bukittinggi (Padang, Indonesia), 28-31 October 2015.
H. Somura (2015): Impact of puddling processes against drainage water quality from paddy fields, 7th World Water Forum (Daegu, South Korea), 12-17 April 2015.
H. Somura (2014): Application of SWAT to Lake Shinji watershed for estimating nutrient loadings from surrounding river basins, 2014 International SWAT Conference (Recife, Brazil), 28 July - 1 August 2014. (Poster Presentation)
H. Somura, Y. Yone, Y. Mori, E. Takahashi (2013): Evaluation of small watersheds inflowing Lake Shinji against the water environment, 2013 International SWAT Conference (Toulouse, France), 15-19 July 2013.
H. Somura, Y. Mori, I. Takeda, H. Sato (2012): Modeling analysis of land-use impact against water qualities in Hii River basin, AGU Fall Meeting (San Francisco, CA, USA), 3–7 December 2012. (Poster presentation)
H. Somura, I. Takeda, Y. Mori, D. Hoffman (2010): Application of SWAT for nutrient load discharge estimation, 2010 International SWAT Conference (Seoul, South Korea), 4-6 August 2010.
H. Somura, I. Takeda, T. Masunaga, Y. Mori, J. Ide (2009): Influence of bird feces to water quality in paddy fields during winter season, AGU Fall Meeting (San Francisco, CA, USA), 14–18 December 2009. (Poster presentation)
H. Somura, I. Takeda (2009): Numerical analyses on seasonal variations of nutrient salts and load discharges in Abashiri River Basin, 2009 International SWAT Conference (Boulder, USA), 5-7 August 2009.
H. Somura, I. Takeda (2009): Application of the SWAT model to the Abashiri River basin for impact assessment analysis to a brackish lake, Hokkaido region, Japan, 1st SWAT-SEA Conference, (Chiang Mai, Thailand), 5-8 January 2009.
H. Somura, I. Takeda, Y. Mori (2008): Relationship between farming activities and water quality variations of drainage water from paddy fields area, World Environmental & Water Resources Congress 2008 (Honolulu, USA), 12-16 May 2008.
H. Somura, I. Takeda, Y. Mori (2008): Estimation of suspended solid discharge to a brackish lake in Shimane prefecture, Japan, 5th SWAT International Conference (Beijing), 17-19 October 2008.
H. Somura, D. Hoffman, J. Arnold, I. Takeda, Y. Mori, Y. Seike (2007) :Impact assessment of climate change to salinity in a brackish lake: A Case Study with SWAT Model and Regression Curve, AGU Fall Meeting (San Francisco, CA, USA), 10–14 December 2007. (Poster presentation)
H. Somura, D. Hoffman, J. Arnold, I. Takeda, Y. Mori (2007): Application of the SWAT model to the Hii River basin, Shimane prefecture, Japan, 4th International SWAT Conference (Delft, Netherlands), 2-6 July 2007.
H. Somura, K. Yoshida, H. Tanji (2006):Irrigation water consumption during the rainy season in the lower Mekong River basin, The 2nd International Symposium on Sustainable Development in the Mekong River Basin (Phnom Penh Cambodia), 16-18 September 2006.
K. Yoshida, S. Shiozawa, K. Higuchi, O. Toda, H. Somura, H. Tanji (2006): Estimation of rice production and evapotranspiration by using plant growth model in Khon Kaen, Northeast Thailand, The 2nd International Symposium on Sustainable Development in the Mekong River Basin (Phnom Penh, Cambodia), 16-18 September 2006.
H. Somura, K. Yoshida, K. Higuchi, O. Toda, H. Tanji (2005): Model development for supplementary water estimation in the Lower Mekong basin , The 19th Congress on Irrigation and Drainage (Beijing), 10-18 September 2005.
H. Tanji, K. Yoshida, H. Somura, K. Higuchi, O. Toda (2005): Cost allocation model for construction and maintenance of irrigation and drainage facilities, The 19th Congress on Irrigation and Drainage (Beijing), 10-18 September 2005.
H. Tanji, K. Yoshida, K. Higuchi, O. Toda, H. Somura (2005): Estimation of recovery of historical fish catch in Cambodia with consideration of flood water levels, The 19th Congress on Irrigation and Drainage (Beijing), 10-18 September 2005.
H. Somura, H. Tanji, K. Yoshida, K. Higuchi, O. Toda (2004): Irrigated water estimation model to paddy fields using pump sets in Cambodia, The 4th International Symposium on Environmental Hydraulics and the 14th Congress of Asia and Pacific Division, International Association of Hydraulic Engineering and Research (Hong Kong), 15-18 December 2004.
K. Yoshida, H. Tanji, H. Somura, K. Higuchi, O. Toda (2004): Mitigation of stream temperature change with reservoir management, The 4th International Symposium on Environmental Hydraulics and the 14th Congress of Asia and Pacific Division, International Association of Hydraulic Engineering and Research (Hong Kong), 15-18 December 2004 .
H. Somura, K. Yoshida, K. Higuchi, O. Toda, H. Tanji (2004): Development of supplementary water estimation model for paddy fields in the Lower Mekong basin, International Conference on "Advances in Integrated Mekong River Management" (Vientiane, Lao PDR), 25-27 October 2004.
K. Yoshida, H. Somura, K. Higuchi, O. Toda, H. Tanji (2004): Stream temperature regulating function of river corridor vegetation, International Conference on "Advances in Integrated Mekong River Management" (Vientiane, Lao PDR), 25-27 October 2004.
K. Higuchi, H. Somura, K. Yoshida, O. Toda, H. Tanji (2004): Irrigation water distribution in Northeast Thailand, International Conference on "Advances in Integrated Mekong River Management" (Vientiane, Lao PDR), 25-27 October 2004.
H. Tanji, K. Yoshida, K. Higuchi, O. Toda, H. Somura (2004): Estimation of fish catch of Cambodia in relation to population and flooding area, International Conference on "Advances in Integrated Mekong River Management" (Vientiane, Lao PDR), 25-27 October 2004.
H. Somura, H. Tanji, K. Yoshida, O. Toda (2004): Estimation of irrigated water to paddy fields during dry season in each province, LAOS, The 2nd APHW Conference (Singapore), 5-8 July 2004.
K. Yoshida, H. Somura, O. Toda, T. Masumoto, H. Tanji (2004): Evaluation of irrigation efficiency at KM6 project site, Laos, The 2nd APHW Conference (Singapore), 5-8 July 2004.
O. Toda, K. Yoshida, H. Somura, H. Tanji (2004): Evaluation of tributaries contribution in the Mekong River basin during rainy and dry season, The 2nd APHW Conference (Singapore), 5-8 July 2004.
H. Somura, H. Tanji, K. Yoshida, O. Toda (2004): Model development for estimating irrigated water in Kandal Province, Cambodia, ICID 2nd Asian Regional Conference (Maoma, Echuca, Australia), 14-17 March 2004.
K. Yoshida, H. Tanji, H. Somura, O. Toda (2004): Evaluation of stream temperature change with reservoir management in Nam Ngum basin, ICID 2nd Asian Regional Conference (Maoma, Echuca, Australia), 14-17 March 2004.
H. Somura, H. Tanji, K. Yoshida, H. Kiri, T. Masumoto (2003): Evaluation of dike construction in Cambodia, ICID Asian Regional Workshop (Taipei), 10-12 November 2003.
K. Yoshida, H. Tanji, H. Somura (2003): The management of stream temperature in Laos, ICID Asian Regional Workshop (Taipei), 10-12 November 2003.
H. Tanji, K. Yoshida, H. Somura (2003): Issues of life cycle assessment for irrigation, ICID Asian Regional Workshop (Taipei), 10-12 November 2003.
K. Yoshida, H. Tanji, H. Somura, T. Masumoto (2003): Evaluation of potential energy loss with dam construction in Laos, Global Mapping Forum 2003 (Okinawa, Japan), 12-15 July 2003.
H. Somura, H. Tanji, K. Yoshida, H. Kiri (2003): Flood risk evaluation at Phnom Penh after development and banking of the Mekong River, DPRI-IIASA 3rd International Conference (Kyoto, Japan), 3-5 July 2003.
T. Kato, H. Somura, I. M. Gardjito (2001): GIS analysis of the nitrogen pollutant load and water quality in Cidanau watershed, The 1st seminar Toward Harmonization between Development and Environmental Conservation in Biological Production (Tokyo, Japan), 21–23 February 2001.
H. Somura, A. Goto, M. Mizutani (2000): Modeling analysis of nitrate nitrogen pollution processes of groundwater in Nasunogahara basin, The XIV Memorial CIGR World Congress (Tsukuba, Japan), 28 November - 1 December, 2000.
国内発表(口頭発表 or ポスター発表)
宗村広昭,E. Rabanizada, S. Mohammad, 諸泉利嗣 (2019):バルクハブ流域における作物収量・灌漑水量の推定,水文・水資源学会2019年度研究発表会(習志野市),2019年9月.
T. Kato, H. Somura, A. Goto (2003):Water quality forecast model of Cidanau watershed, Indonesia, for watershed management planning, Title of Sustainable Agriculture in Rural Indonesia, Hayashi, Y., Manuwoto, S. and Hartono, S. (Eds.), Gadjah Hada University Press, 3-14. (ISBN 979-420-521-4)