| Project/Area Number |
26450344
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Rural environmental engineering/Planning
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| Research Institution | Okayama University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
永井 明博 岡山大学, 環境生命科学研究科, 教授 (80093285)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 洪水比流量曲線 / DAD関係 / 確率流量 / 既往最大面積雨量 / 既往最大洪水比流量 / クリーガー式 / 角屋・永井による式 / 洪水危険度 / 気候変動 / 確率年 / DAD式 |
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| Outline of Final Research Achievements |
An implicit flood envelope curve (FEC) equation was derived as a solution to a system of a 6-parameter depth-area-duration (DAD) equation, a time of concentration formula and the rational formula. The FEC equation was respectively applied to present and future probabilistic specific discharge in six river basins in Japan. The comparison of present and future FECs shows different characteristics of change in probabilistic flood discharge especially by basin area. In addition, flood envelope curves were derived from DAD relations in record maximum areal rainfall data for each of 15 regions in Japan, and the estimated peak specific discharge from the DAD relation exceeded the estimated by conventional flood envelope curves as Creager’s and Kadoya’s in some of the regions including the South Hokkaido area.
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