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A Study on Flow Distribution for Maintaining Two-way Channel

By 朋紀 永多, 浩保 安田, 康玄 渡邊, Tomonori NAGATA, Hiroyasu YASUDA and Yasuharu WATANABE

Abstract

On the Shibetsu River, there has been a project to reconnect previous meandering channel remaining as oxbow lakes with the current river channel. In this project, the two-way channel method which allows straightened parts and previous meanders to co-exist was adopted for restoring the rich natural environment had been lost-by straightening while maintaining the function to flow flood water safely . A variety of surveys on the test site profiles were conducted over seven years in the site. In this study, the consideration of the discharge ratio of a two-way channel was conducted with the focus on bed deformation of the channel. Also verification of measurement data via non-uniform flow calculations was conducted. The water levels of meandering and straight parts were calculated. The flow distribution ratio was found to be estimable from the difference in cross-sectional areas of flow at the diverging points

Topics: Two-way Channel, Flow Distribution ratio, Bed Deformation
Publisher: 公益社団法人土木学会
Year: 2010
OAI identifier: oai:kitir.lib.kitami-it.ac.jp:10213/1881
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