长江上游二龙口河段河床演变分析

Analysis of the Riverbed Evolution for Erlongkou Reach on the Upper Reaches of the Yangtze River

以长江上游二龙口河段规划建设的江安二桥为例,结合该河段河床实测地形资料,分析河段岸线、深泓线、洲滩、深槽等深线年际变化特性,通过对该河段多年水文地质资料分析,总结河床演变趋势与河床稳定性,认为工程河段相对稳定的河道形态将继续保持,能够满足工程建设对河床稳定性的需要.

The Erlongkou Reach is the typical mountain river on the upper reaches of the Yangtze River. The planning Jiangan Second Yangtze River Bridge,which is located on that reach,is taken as an example in this paper. According to the riverbed topographic data,the variation characteristics of the depth contours of shoreline,thalweg,bottomland and deep groove are analyzed. By analyzing of the hydrogeological data of many years,the riverbed evolution trend and stability is summarized. The research result shows that the reach is stable,meanwhile the river forms will continue to maintain,and riverbed conditions can meet the construction needs.