著者

大槻 順朗 大八木 豊 島谷 幸宏 朴 埼〓

出版者

Japan Society of Civil Engineers

雑誌

水工学論文集 (ISSN:09167374)

巻号頁・発行日

vol.52, pp.361-366, 2008 (Released:2010-08-25)

参考文献数

9

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Urban development causes serious changes to watershed conditions by decreasing storage area, introducing pavement and channeling. As a result, the peak discharge has been increasing and the arrival time of peak becomes early. The purpose of this study is to investigate the state of retention facilities such as irrigation ponds and paddy area in Mikasa River watershed. The result of investigation shows the rate of the capacity of flood control of dam, ponds and paddy area are 37.1%, 14.6%, 48.3% and total capacity is 3, 063, 000m3.For the estimate of the storage facility effects, we applied the distributed runoff model considering ponds and paddy area effects. The result of calculation showed that the peak discharge at Sanno Bridge decreased 36m3/s by dam, 31m3/s by ponds and 36m3/s by paddy area.

著者

大八木 豊 島谷 幸宏 杉本 知佳子 加藤 憲介 朴 埼〓

出版者

Japan Society of Civil Engineers

雑誌

水工学論文集 (ISSN:09167374)

巻号頁・発行日

vol.50, pp.325-330, 2006 (Released:2010-11-30)

参考文献数

10

被引用文献数

1

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Urban developments cause serious changes to watersheds conditions by decreasing storage area, introducing pavement and channeling. As a result, the peak discharge has been increasing and the arrival time of peak flow becomes early. The purpose of this study is to investigate the empty capacity of irrigation ponds in the Mikasa River watershed and to clarify flood control capacity of them. The result of this study, the catchments area of all irrigation ponds was about 18%, the capacity of flood control was about 450, 000m3 in the Mikasa river watershed. To estimate the flood control ability of irrigation ponds, we applied the distributed runoff model considering ponds effects about flood disaster in July 19, 2003. The result of calculation showed that the peak discharge at the Sanno Bridge decreased 36m3/s by the irrigation ponds.