急拡・急縮を有する山地河川の水面形と断面形状の変化に伴う背水効果に関する研究

抄録

In recent years, the increase in extreme weather event and the accompanying flood disasters are becoming more intense, especially flood disasters in small or medium rivers and mountainous rivers. This study aims to clarify the influence of cross-sectional and longitudinal sections on river flow and water surface profiles when intense mountain flooding occurs.

In this paper, in order to give a clear answer to the fundamental problem of hydraulics "When the water surface profiles of non-uniform flow accompanying the change of cross-sections is formed?", For this reason, I analyzed factors influencing the backwater effect of the water level on the upstream side of the contraction points.