Research Projects -
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Analytical system on water and soil environment in paddy field areas for animal-habitat conservation
Grant number：16380221 2004 - 2007
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
TAKEDA Ikuo, MORI Yasushi, ISHII Masayuki, KIHARA Yasutaka, SOMURA Hiroaki
Grant type：Competitive
Environmental factors of agricultural and forestry areas were evaluated in the light of hydrology, water quality and soils science in paddy field and forestry areas in the eastern part of Shimane prefect= and other districts. In particular for the environment for animal habits in agricultural areas, the relationship between bio-diversity and environmental factors were evaluated in a paddy-field area in the eastern part of Shimane Prefecture. The parameters were water qualities, fishes, aquatic insects, and physics' environmental factors (breadth of canal, water depth, flow velocity, vegetation coverage, and soil coverage of undersurface) in drainage canals. As a result, eleven species of fishes and fourteen species or family of aquatic insects were observed in the investigation sites and diversity indexes calculated by Shannon-Wiener method were evaluated. Then, it was clarified that the diversity indexes for aquatic insects were affected by some water qualities, breadth of canal and soil coverage of undersurface. On the other hand for the mass balance of pollutants in a paddy field watershed using a circular irrigation system, a long-term investigation on the water quality and hydrology was carried out As a result, the change in annual pollutant loads was primarily attributed to the amount of hydrological water volumes (the annual amount of rainfall or that of rainfall plus irrigation water), and the purification function was related to the hydraulic retention time. By using these results, the environmental factors in agricultural and lineally area were evaluated in the light of material cycles, hydrology, water quality and sail science. Moreover the main factors were quantified and relationships among them were evaluated in other to integrate the GIS based environmental analysis.
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流域水環境管理*流域環境の変化が生物生息環境に与える影響*営農など人間活動が流域水環境へ及ぼす影響*河川流域が下流湖沼の水文・水質環境に及ぼす影響*コハクチョウの越冬が冬期湛水水田の水環境に与える影響と営農コスト削減効果に関する研究
Grant type：Competitive
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Modeling Analysis of NO3-N pollution Processes of Groundwater.
0100 (Japanese Only)
Grant type：Competitive
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流域水資源管理*半乾燥地における水資源の有効利用を通した農業生産の安定化と河川生態系保全に関する研究
Grant type：Competitive
アフリカ・モザンビーク・リンポポ川流域において，特に乾期の灌漑水量の確保・食糧生産の安定化と環境用水・生態系保全とのバランス（最適管理）に関する研究を，モザンビークから来た留学生と共に開始している．
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流域水資源管理*半乾燥地における水資源の有効利用と農業生産の安定化に関する研究
Grant type：Competitive
アフガニスタンにおいて，流域における水資源の確保・有効利用と農業生産（特に麦）の安定化を目指して，水資源量（灌漑水量）に関する解析や将来的な気候の変化による水資源量の変化に関する解析を，アフガニスタンからの留学生と共に行っている．