2007 Fiscal Year Final Research Report Summary
Analytical system on water and soil environment in paddy field areas for animal-habitat conservation
| Project/Area Number |
16380221
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Boundary agriculture
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| Research Institution | Shimane University |
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Principal Investigator |
TAKEDA Ikuo Shimane University, Faculty of Life and Environment, Professor (60227022)
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| Co-Investigator(Kenkyū-buntansha) |
MORI Yasushi Shimane University, Faculty of Life and Environment, Associate professor (80252899)
ISHII Masayuki Shimane University, Faculty of Life and Environment, Associate professor (50293965)
KIHARA Yasutaka Shimane University, Faculty of Life and Environment, Associate professor (30204960)
SOMURA Hiroaki Shimane University, Faculty of Life and Environment, Assistant professor (90403443)
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| Project Period (FY) |
2004 – 2007
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| Keywords | paddy field watershed / water quality / habitat / GIS system / percolation water |
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| Research Abstract |
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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Research Products
(96 results)
