“库中库”模式在湖泊型多沙水库中的应用

Application of“Main-vice Reservoirs”Model in Lake-type Heavily Silt-carrying Reservoirs

为解决多沙河流上的湖泊型水库的泥沙淤积问题,提出利用水库地形条件,通过在库区设置拦沙墙形成"库中库"的排沙蓄水模式,并以德日苏宝冷水库为例,对设置拦沙墙的防沙及冲沙效果进行了物理模型试验和水流泥沙数值模拟研究。结果表明,在多沙水库中采用"库中库"模式既可防止副库区淤积,又能增强主库区的拉沙效果,是一种解决湖泊型水库库区泥沙淤积的有效工程措施。

This paper studied the silt-block wall's effect on reservoirs sand sluicing by using physical experiment and numerical simulation,which was set in lake-type and heavily silt-carrying reservoirs and rivers.In order to solve the problem of desilting and sediment washout,we put forward an engineering model called‘main-vice reservoir'to sweeping away sand and impound.The model took advantage of reservoirs' terrain conditions and silt-block wall,and we took a real project as an example to expound the theory in detail.The result of engineering application show that‘main-vice reservoir'model is a kind of effective measure to solve siltation problem in heavily silt-carrying reservoirs.The model can not only prevent auxiliary reservoir from silting,but also enhance the effect of sediment flushing of the whole reservoir.Therefore,it is an effective engineering measure to solve silt sediment in lake-type reservoir region.