土砂移動・河床変動 (2)

[II-208] Study on Riverbed Variation Management by Groin at the River Confluence

*西尾 潤太¹、神田 佳一¹、道奥 康治²、中村 文則³ (1. 明石工業高等専門学校、2. 法政大学、3. 長岡技術科学大学)

Keywords:Riverbed Variation Management, Groin, Modeling Experiment, Tributary Confluence, Meandering River

The Kakogawa River flows through Hyogo Prefecture in Japan. At the confluence of Kakogawa and Mino River, due to the meander in the river upstream, barrage water from the large barrage and the Mino River tributary has promoted the development of a sandbar on the right bank. The sandbar, which has enlarged and become fixed. To wash away the sandbar, the groin was installed in 2015. The purpose of this study was to survey the river topography near the river confluence and identify the factors responsible for sandbar development by using model experiments.