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位于长江上游干流大渡口至寸滩黑石子（包括嘉陵江汇口）的重庆河段，全长３０余公里，是重庆港客货码头集中分布区，也是我国西南地区最大的水陆联运枢纽。该段处于正在兴建的三峡水库变动回水区范围内，又是嘉陵江汇入长江的河段，两江水流相互顶托，水流条件和泥沙运动十分复杂。为分析研究重庆河段的走沙过程，预测三峡水库变动回水区泥沙冲淤规律，为航道整治、河工模型试验和数模计算等提供借鉴和基本资料，在该河段内选择了有代表性的４个典型河段，观测研究这些典型河段的走沙规律。简要介绍了重庆河段的基本特性及走沙规律的观测方法，对走沙过程、走沙强度、走沙量的时空分布等进行了初步分析。
Located in the upper reach of the Yangtze River upstream from Dadukou to Cuntan Black Rock (including the Jialing River mouth) Chongqing section, a total length of more than 30 kilometers, Chongqing port passenger and freight terminals concentrated distribution area, but also the largest in Southwest China’s land and sea transport hub. This section is in the scope of the Three Gorges Reservoir Backwater Area under construction. It is also the Jialing River into the Yangtze River. The water flow and the sediment movement of the two rivers are very complicated. In order to analyze and study the process of sediment removal in Chongqing reach and predict the law of sedimentation and erosion in the fluctuating backwater area of the Three Gorges Reservoir and provide reference and basic data for waterway regulation, river model test and numerical simulation, etc., Representative of four typical river sections, observation and study of these typical river runoff law. This paper briefly introduced the basic characteristics of the Chongqing reach and the observation methods of the sediment-removing law, and carried out a preliminary analysis of the space-time distribution of the sand-removing process, the sand-walking intensity and the sediment discharge.