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采用数值模拟、比尺模型试验等方法分析了钱江三桥桥墩阻水情况及其对钱塘江杭州河段防洪的影响．采用Newton－Rophson迭选代法求解—维定常非均匀流动问题；采用等参单元技术求解—维非定常流动积分方程；采用推求各水位站水位与控制水位相关关系的方法进行比尺模型试验。
The water blockage of Qianjiang No.3 Bridge Pier and its effect on flood control in Hangzhou section of Qiantang River are analyzed by means of numerical simulation and scale model test. The Newton-Rophson iterative method is used to solve the problem of constant non-uniform flow with constant dimension. The isoparametric element technique is used to solve the non-stationary flow integral equation. The scale model test is carried out by deducing the correlation between water level and control water level.