白石水库泥沙淤积影响因子计算分析

为分析白石水库泥沙淤积影响因子并准确计算各因子的影响程度,定性分析了白石水库水沙情况,获取了泥沙淤积的主要影响因子;再依据2001～2008年白石水库水沙资料,采用偏最小二乘法建立模型,定量计算各影响因子对水库泥沙淤积的影响程度,采用灰色关联度法验证了计算结果。结果表明,影响白石水库泥沙淤积的主要因子及其影响程度为平均流量35.26%、汛期降水量30.66%、入库水量15.31%、出库水量12.52%、平均输沙率3.55%、最大流量2.65%和平均含沙量0.05%。

Analysis and Calculation of Sedimentation Impact Factors of Baishi Reservoir

In order to scientifically analyze sedimentation impact factors of Baishi reservoir and accurately calculate the influence degree of each factor, the situation of water and sediment is analyzed qualitatively and main impact factors of sediment deposition are obtained. According to water and sediment data of Baishi reservoir from 2001 to 2008, the model is established by using partial least squares regression (PLS) and the influence degree of each factor is calculated quantificationally. At the same time, grey correlation method is applied to verify the model. The results show that the sediment deposition impact factors and their impact degrees of Baishi reservoir are as follows: the average flow 35.26%, precipitation of flood period 30.66%, reservoir inflow 15.31%, reservoir discharge 12.52%, the average sediment transport rate 3.55%, maximum discharge 2.65% and average sediment concentration 0.05%.