中文摘要：

为了研究水洞沟水库的水沙运移情况。建立了三维水沙数学模型，采用非结构网格的有限体积法，对两种工况水库的水沙运动进行了数值模拟研究，对三个典型层的流场、部分断面的流速分布及部分断面的河床高程进行了分析。结果表明：流场的模拟值符合水流运动的一般规律，即从底层到表层流速逐渐增大；断面流速的分布规律也是合理的；几个典型断面的河床高程的模拟值与实测值较为一致。从而说明建立的数学模型可应用于跟水洞沟水库类似的工业供水水库。

英文摘要：

In order to study the flow and sediment transport in Shuidonggou Reservoir, a three-dimensional flow and sediment mathematical model is established, and the governing equations of the model are discredited with the finite volume method （FVM） on unstructured grids. The flow and sediment movement of two different conditions in Shuidonggou Reservoir is simulated. Numerical re- suits of velocity distribution and bed elevation on different cross-sections and the flow field of the three typical layers were obtained. The results show that： the simulation result of the flow field conforms to the general law of water flow movement, that is, the veloc- ity increases gradually from the bottom to the surface; velocity distribution on different cross-sections is reasonable. Simulations of several typical cross-sections of river bed elevation values are consistent with the real measured value. So the model established in this paper can be used to simulate the 3-D flow and sediment transport in the reservoirs similar to Shuidonggou Reservoir.