金盆水库上游降雨径流二维泥沙输移沉积模拟

Two-dimensional Sediment Transport Simulation of Rainfall Runoff in the Upper Reaches of Jinpen Reservoir

为了探究降雨径流在不同流量、含沙量下对西安市金盆水库水体的影响规律,基于湍流流动模型,对2022年10月降雨径流时期西安市金盆水库上游的泥沙输移和沉积进行了数值模拟,并对所建立模型的可靠性进行了验证。通过对不同流量、含沙量下的径流进行模拟计算,表明在沿程前部断面处,流速越大底部含沙量越小;在沿程后部断面处,流速越大断面含沙量越高;径流含沙量越大,断面含沙量越大,泥沙分布厚度越大。因此,可以根据降雨径流时期来水的流量及含沙量分析泥沙输移沉积的过程,为水库的运行维护提供参考。

In order to investigate the influence of rainfall runoff on the water body of Xi'an Jinpen Reservoir under different discharge and sediment content,the sediment transport and deposition in the upper reaches of Xi'an Jinpen Reservoir during the rainfall runoff period in October 2022 are numerically simulated based on the turbulent flow model,and the reliability of the established model is verified.Through the simulation calculation of runoff with different discharge and sediment content,it is shown that the sediment content at the bottom of the section along the front section is smaller with the higher velocity,and at the rear section,the higher the velocity,the higher the sediment content.The larger the sediment content of runoff,the larger the sediment content of cross section,and the larger the sediment distribution thickness.Therefore,the process of sediment transport and deposition can be analyzed according to the discharge of rainfall runoff and sediment content,which can provide reference for the operation and maintenance of the reservoir.