破堤氾濫流量の数値計算推定手法に関する研究

抄録

Authors performed large-scale experiments of overtopping breach using an experimental flume located on the floodway of an actual river channel. By taking advantage of the scale of the flume, we monitored the levee breach process with state-of-the-art observation devices under highly precise hydraulic conditions. Four test cases with variations of inflow rate, levee material and levee shape were performed, and the levee breach were monitored quantitatively using acceleration sensors installed in the levee body. Authors attempted to reproduce the experiment results by a parameter equation method as well as a numerical modeling method, and identified merits and demerits of the both methods regarding the prediction capability of the overflow rate.