长江官洲河段近期河床演变分析

长江官洲河段位于安徽省内,上起吉阳矶,下至皖河口,为首尾束窄中间放宽的鹅头型分汊河道,全长28.0km。该文根据历年水文泥沙及水下地形图等基础资料,分析了该河段的近期演变情况。通过对洲滩及汊道演变分析,得出结论:目前该河段河势处于相对稳定状态,岸线基本稳定。受上游东流河段河势变化影响,局部河床会发生冲淤变化。

Analysis of Recent Riverbed Evolvement of Guanzhou River Section in Changjiang River

Guanzhou River Section in Changjiang River is located in Anhui Province.Its upper reaches starts at Jieyangji and its lower reaches go to the estuary of Wanghe River.It is the goose conk shape of branch river that is the binding narrow at its beginning and end and the widening in its middle.Its total length is 28.0 km.According to the basic data of the historically hydrologic silt and underwater relief map,the article analyzes the recent evolvement conditions of this river section.Through the analysis of Guanzhou beach and branch evolvement,the conclusion is that the river trend in this river section is now at the comparatively stable status and the bank line is basically stable.Influenced by the river trend variation of Dongliu River Section at the upper reaches,the silting variation will happen at the partial riverbed.