観測水位を境界条件とした分布型流出・1次元河道網洪水流解析とモデルパラメータの最適化～平成24年7月九州北部豪雨時の彦山川流域を対象にして～

抄録

In this study, the runoff and one-dimensional flood flow simulations with the observed water level as the boundary condition by the distributed runoff and one-dimensional river network model and optimization of its parameters were performed in the Hikosan River basin in a heavy rain of northern Kyushu in July 2012. And its validity was also examined. It showed that the optimization method could sufficiently reproduce the water level/discharge hydrograph and the flood marker, and was useful for the evaluation of the resistance and flow discharge in the river channel. In the future, it is necessary to consider the effects of movable weirs and bed variations to improve reproduction accuracy.