三峡水库是河道型水库,以常规的静库容方法推算库区水位变化误差较大，有必要应用水动力学模型进行计算。建立了基于一维非恒定流的水动力学模型，模拟库区河道水流演进过程，预测三峡坝前的水位、流量过程。选取2007年9月25日至10月3日的三峡水库蓄水资料进行计算，并与实测水位比较。结果表明，该模型具有较好的精度，能够为实际蓄水调度提供参考。

As the Three Gorges Reservoir is a channel reservoir, the static reservoir cubage method is not suitable for the accurate calculation of the reservoir water level. In this paper, a hydrodynamic model is built based on one dimensional unsteady flow. The model can predict the processes of water level and flow in front of the reservoir by simulating the process of flood routing in the river channel. Moreover, this model is validated by computation result using the impoundment data from 25 September to 3 October in 2007 and the comparison with observed data. It is manifested that this model offers good accuracy and can be applied to reservoir operation.