水面线是水力学研究的重要组成部分,其在水利工程、水文预报及水库管理中占有重要地位.棱柱体明渠水面线的研究目前已较成熟,而对于非棱柱体明渠复式河道的水面线相关研究较少.首先从棱柱体明渠水面线分析角度入手,通过对棱柱体明渠水面线计算公式的分析,提出变宽度明渠水面线研究要点,进而从水沙作用的角度出发,定性分析由于河道冲刷或淤积而发生的水面线变化,最终得出变宽度复式河道水面线在动床工况下的水面线计算公式.%Water surface profile is an important content in the research of hydraulics, and it plays an important role in hydraulic engineering, hydrological forecasting and reservoir management.Nowadays, the reaearches about water surface profile in prismatic channel have been grown up, while the related research about nonprismatic channel is little.Firstly, the calculation formula of water surface profile in prismatic channel was analyzed, and the point of water surface profile in varied-width open channel was put forward, the changes of water-surface profile because of erosion and sedimentation from the water sand were analyzed, and finally, the calculation formula of water surface profile in the lotus root shape compound channels with the condition of movable bed was obtained.
展开▼
