基于泥沙冲淤数值模拟的水库调度方案研究

Numerical simulation of sediment scouring-based study on reservoir operation scheme

以东台子水库为研究对象,基于一维不饱和全沙数值模型,研究蓄洪运用方案、蓄洪排沙运行方案、分阶段蓄洪运用方案、蓄清排浑运用方案等四种水库调度方式下的泥沙淤积情况,力图在兴利防洪的基础上尽量利用弃水排沙,保持有效库容。对不同运行年限的淤积量、水库库容变化和排沙比等要素的模拟研究表明,分阶段蓄洪运用或蓄清排浑运用方案更有利于保持有效库容,对延长水库使用寿命具有一定作用,是较优的水库排沙优化调度方案。

By taking Dongtaizi Reservoir as a study case,the sedimentations under four reservoir operation modes,such as flood storage operation scheme,flood storage and desiltation operation scheme,phased flood storage operation scheme and the operation scheme of storing clear andreleasingmuddy,are studied herein based on a 1- D unsaturated sediment numerical model,so as to make a best effort to utilize the abandoned water for desiltation and keeping the effective storage on the basis of benefit exertion and flood control. The simulative study made on the factors of the siltation volumes of various operation years,the changes of reservoir capacities and the desiltation ratio shows that both the phased flood storage operation scheme and the operation scheme of storing clear andreleasingmuddy are more favorable to keep the effective reservoir capacity and have certain role to prolong the service life of reservoir,and then are better optimal operation scheme for desiltation of reservoir.