河川・水理構造物 (1)

[II-140] Estimation of levee breach point by using levee vulnerability index t* and consideration of inundation flow characteristics in a river basin

*田端 幸輔¹、福岡 捷二¹ (1. 中央大学研究開発機構)

Keywords:levee vulnerability index, levee breach, inundation flow analysis, flood risk, Kinu River 2015 flood

To examine the flood risk management measures, it is important to estimate the levee breach points, inundation discharge hydrograph and motion of the inundation water in the basin as precisely as possible. In this paper, we estimated the levee vulnerability index t* in the Kinu River which suffered in 2015 flood. Also, we conducted the inundation flow analysis under the actual and hypothetical levee breach conditions based on the value of t*. It is concluded that the difference in the location and time of the levee breach influences on the motion of the inundation water and inundation areas in the basin.