複断面水路を通過する洪水波の水理特性
1994 年 38 巻 p. 443-448
詳細
1994 年 38 巻 p. 443-448
Hydraulic characteristics of unsteady flows were investigated experimentally when flood waves were passing through compound open channels. Some noticeable features of unsteady flow structure in compound channels were revealed which were significantly different from those in single rectangular channels. The unsteadiness of velocity becomes very large in main channels and the peak of velocity appears very earlier than in rectangular channels. Lateral shear stress increases in a rising stage at an interface region of main channel and flood plain. The bed shear stress exceeds the value of steady peak flow in the rising stage.
