| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2013: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Outline of Final Research Achievements |
Basic research has been conducted for determining optimal placements of eco-frinedly physical structures such as fish nest, fish pool, etc. in agricultural drainage canals. Hydraulic variables have been observed in a section of drainage canals with fish nests and that with both fish nests and a fish pool. Comparisons in turbulence characteristics and estimated fish energy expenditure at the fish nest, the fish pool, and control revealed that the fish nest had the least turbulent conditions regarding most turbulent characteristics. Since the fish energy expenditure was significantly lower in the fish nest and the pool than in the control, it could be concluded that these eco-friendly structures certainly work as resting areas for fish. Suitability for both swimming fish and bottom fish were also evaluated by combining numerical simulation of flow in the canal and the habitat suitability index model.
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