清河水库泥沙淤积与回水计算

Sediment Deposition and Backwater Calculation of Qinghe Reservoir

水库泥沙淤积与回水计算是确定水库运行状态的重要工作。以清河水库为例,对水库泥沙淤积与回水进行计算分析,确定出水库泥沙淤积形态为椎体淤积,计算结果表明:建库后的洪水回水水面线离坝址越近越平缓,越远越急陡;对比不同频率回水曲线,小频率较高频率回水坡降陡、回水末端近,基本符合回水的一般规律,且与可研阶段基本一致。

Reservoir sediment deposition and backwater calculation is an important work to determine reservoir operation state. Qinghe Reservoir as an example, the article calculates and analyzes of reservoir sedimentation and backwater, determines the reservoir sedimentation patterns to be the vertebral deposition. The calculation results show that the reservoir＇s flood back- water surface profile from the dam is more closer more gentle and more farther more steep. For comparison of different frequency＇ s backwater curve, small frequency more higher more steeper and the backwater end is closer. It basically complied with the general rules and the same with the studied stage.