三峡坝下游冲刷荆江河段演变趋势研究

Study on the Trends of Jingjiang River Evolution Caused by the Downstream Scour of the Three Gorges Project

本文根据河道主要特性、河段天然状态的反馈调整规律以及三峡枢纽下游冲刷一维数模计算成果 ,运用最小能耗率理论分析河道演变机理 ,预测清水下切冲刷后该河段横向变形趋势、崩岸的必然性 。

The trends of Jingjiang River evolution caused by the downstream scour of the Three Gorges Project is studied in this paper.Based on the main characteristics of the river,the feedback of the river bed under natural status,the one_dimensional numerical model results of the downstream scour of the Three Gorges Project,and the theory of minimum energy dissipation rate,the mechanism of the evolution in this river is analyzed.The transverse migration tendency and the probability of bank collapse are predicted.The key river reaches for prevention in the river are presented.