钱塘江东江嘴切滩工程对闻堰河段的影响分析

Studying on the Influence of the Qiantang River Dongjiang Zuiqietan Project to Its Weir

钱塘江东江嘴实施切滩工程后,闻堰河段洪水的流态发生较大变化.现采用二维定床数学模型,分别就四种重现期洪水、四种切滩方案的不同组合进行闻堰河段流场的计算和对比分析表明切滩后洪水顶冲点下移,流速总体上有所减小,但其流速的绝对值仍为较大,闻堰塘前滩地最低冲刷高程基本不变,为闻堰海塘的加固提供了依据.

After Qiantang River Dongjiang Zuiqietan project is actualized, the flow state of weir flood Changes heavily. The anther adopts two - dimension model, calculates and compares four kinds of reappear flood and four projects. The result appears that the velocity of flow is reduced but absolute velocity is high relatively. It provides the basis for weir reinforcement.