鄱阳湖湖口河段近期演变规律及趋势分析

Analysis of Fluvial Process of Hukou Reach in Poyang Lake Basin

湖口河段是鄱阳湖流域水量汇入长江的唯一出口,也是江西与外界航运交通的咽喉,其演变情势直接影响流域防洪和航运安全。利用历次实测的水下地形图及湖口水文站实测断面资料,对河道冲淤、纵向及平面变化进行了分析。结果表明:湖口河段左岸滩地以淤积为主,主河槽及深泓线近期冲刷较严重,右岸受地形约束基本保持稳定。在未来一定时期内,河段岸线仍将保持相对稳定,并将维持左岸滩地淤积,主河槽和右岸冲刷的趋势。

Hukou reach is the only outlet where the water flow from the Poyang Lake into the Yangtze River,and the way to the outside of Jiangxi Province by shipping.Its fluvial process will directly influence the control of basin flood and shipping security.Based on underwater topographic maps and river section data at Hukou hydrometric station,channel erosion,horizontal and vertical changes of the channel were analyzed.The results show that the left beach of Hukou reach mainly performs deposition,while the main river and its talweg have relatively serious erosion recently.Constrained by topography,the right bank almost keeps stable.In the next period,the river shoreline will remain relatively stable.While the left beach deposits,the main channel and right bank will maintain the trends of erosion.