河川計画・管理

[II-163] Estimaiton of Foremation Avoidance Topograpy on Dynamic Equilibrium State of Bed

〇Kaori ISHIZUKA¹, Kotaro Umeki¹, Michihide Ishihara¹, Takumi Igarashi², Hiroyasu Yasuda¹ (1.Niigata Univerciy, 2.kitac)

Keywords:sand bar, bank erosion, erosional failure of bank, river management

Bank erosion is typical failure in gravel bed rivers. We have developed an prediction method of bank erosion point due to uneven distribution of flood flow using tractive force. However, the method is based on physical model that is not neglect any uncertainly. In this study, we try to combine new prediction method focusing on river bed shape with the previous method using flume experiment and numerical simulation of actual river. We showed that both prediction methods can estimate bank erosion point well.