| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Along the paradigm of near-nature river work, structure tend to be constructed with natural materials. The present research is to highlight such nature-friendly river works focusing on hydrodynamics of vegetation or rock-arranged structures. First, a hydrodynamic model was devised for analyzing flow in vegetated channels like flood protection forests. Secondly, hydrodynamics were discussed for rock-arranged structures. Hydrodynamics of rubble mound structures were examined and theoretical solutions for water surface profile and discharge rating curve were validated in comparison with experimental data. Performance of the rubble mound structure for dissipating flow energy and removing pollutants were also discussed by applying the proposed model. Thirdly, an analysis was conducted to investigate flow fields in gravel-bed channels with alluvially meandering thalweg or with alternating sandbars, which provides information on self-purification performance of such channel works.
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