一、引言溢流坝的流量系数、自由表面位置、坝面流速及压力等都是工程设计中的必要数据,也是确定合理溢流曲线型式的必要依据。这些数据,目前主要依靠水力学模型试验获得。这样做既较费时,又不够经济,因而研究一种高精度的快速计算方法,是有较大实际意义的。过溢流坝水流,是在重力作用下由于边界 I. INTRODUCTION Spillway flow coefficient, free surface position, dam surface velocity and pressure are all the necessary data in engineering design, which is also the necessary basis to determine the reasonable overflow curve type. These data, at present mainly rely on hydraulic model test obtained. This is both time consuming and not economical enough, so it is of great practical significance to study a fast and accurate method of calculation. Overflow dam flow, is under gravity due to the boundary