著者

冨永 晃宏 庄 建冶朗 内藤 健 松本 大三

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.49, pp.1009-1014, 2005-02-01 (Released:2011-06-27)

参考文献数

9

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A traditional river structure, “Seigyu”, is a kind of spur dikes for protecting riverbank against erosion. Actual examples of Seigyu groins and their effects on bed protection were surveyed in the Ooi River. Experiments on flow structures and bed evolution were conducted in a laboratory flume with Seigyu models. The effectiveness of the groins was recognized on the deceleration of downstream flows and on the prevention from bed scour. The arrangement manner and the placing method of the groins were also investigated. A series of Seigyu groins is effective even for steep-slope flows but the erosion becomes very large beside groins. We compared the bed configuration around Seigyu groins with that around a group of rod roughness. The characteristics of resistance to flow for Seigyu groins is different from that for rod dikes because Seigyu groins have gabions near the bed. This fact makes different effects on riverbank protection.