【摘要】 本文基于三峡水库175m高水位蓄水运行的背景,根据所收集的实测地形、水文、泥沙资料,针对三峡蓄水后坝前回水对变动回水区产生的壅水影响,选择变动回水区中间段鹅公岩河段作为研究代表,借助SMS地表水模拟软件建立研究河段的平面水流二维数学模型,对蓄水前后鹅公岩河段的水动力条件及推移质输移变化进行了对比研究。本文研究成果对该河段河演规律分析、航槽区域划分以及航道工程整治提供了技术支持,同时可为同类河段的研究提供参考。更多还原

【Abstract】 This article is based on the Three Gorges reservoir’s operation at water level 175 m and the collected data of topography, hydrology and sediment measurements. We examine the backwater effects in the fluctuating backwater zone of the reservoir after its impoundment. A 2D depth-integrated flow model was adopted in the framework of a SMS surface water simulation code for simulation of the representative Egongyan reach located in the middle of the fluctuating backwater zone, focusing on its hydrodynamic and bedload transport conditions and their responses to the impoundment. The results provide technical support to analysis of riverbed evolution, waterway management, and waterway regulation.更多还原