Author(s): Akihide Watanabe; Shoji Fukuoka
Linked Author(s): Akihide Watanabe, Shoji Fukuoka
Keywords: Flood flow; Hydrograph; Unsteadiness; Meandering compound channel; Channel plan-form; Depth-discharge curve
Abstract: Hydraulic effects of unsteadiness, plan and cross-sectional shapes of channel on flood flow were investigated in meandering compound and single channels. In the case of an unsteady meandering compound channel flow, the discharge and velocity had two values for the same depth on rising and receding water periods. Comparing stage hydrographs for meandering compound and single channels, it was observed that compound meandering channel had early response giving high values during rising water period and delayed response giving high values during receding water period. Also, greater unsteadiness and sinuosity are accompanied by earlier peaking of velocity and a greater rate of depth increase in the rising water period.
Year: 2001