中文摘要：

水力发出的电力工程的构造例如 Xiluodu 和 Xiangjiaba 水库，将在三个峡工程(TGP ) 的波动的回水活动范围在免职和侵蚀过程在上面的长江导致到来的水的变化，沉积调节并且接着变化。在这份报纸，基于水和沉积特征， 2D 在边界试穿的数学模型直角的曲线的坐标系统被采用了在重庆活动范围预言沉积的时空变化， TGP 的波动 的回水活动范围的部分，在有有或没有在上游的水库的构造的 19611970 水文学系列的重复的 100 年的一个时期。结果证明在没有在上游的水库的自然水文学系列(NHS ) 的情况中，严重免职与凹面河岸线，再通行流动区域和宽浅的活动范围发生在海湾。在有在上游的水库的调整的情况中，仅仅一点免职在长江与免职的凹面河岸线，和数量在海湾存在， Jialing 河活动范围是在 NHS 的情况中的大约 1020% 那些。因此，这是有用的维持 TGP 水库的有效能力并且利用重庆活动范围的河岸线。

英文摘要：

The construction of hydropower projects, such as Xiluodu and Xiangjiaba Reservoirs, in the upper Yangtze River will lead to variations of the incoming water and sediment conditions and in turn changes in the deposition and erosion processes in the fluctuating backwater reach of the Three Gorges Project （TGP）. In this paper, based on the water and sediment characteristics, a 2D mathematical model in the boundary-fitting orthogonal curvilinear coordinate system has been employed to predict the space-time changes of sedimentation in the Chongqing reach, part of the fluctuating backwater reach of TGP, in a period of 100 years with repetition of the 1961-1970 hydrological series with and without the construction of upstream reservoirs. The results show that in the case of natural hydrological series （NHS） without upstream reservoirs, severe deposition occurs in bays with concave bank lines, recireulation flow areas and wide-shallow reaches. In the case with the adjustment of upstream reservoirs, only a little deposition exists in bays with concave bank lines, and the amounts of deposition in the Yangtze River and Jialing River reaches are about 10-20% of those in the case of NHS. Therefore, this is helpful to maintain the effective capacity of the TGP Reservoir and utilize the bank lines of the Chongqing reach.