长江鄂赣边界河段河床演变特性分析

摘要

In order to correctly master the influence of sand mining activities at the important boundary river reaches of Hubei Province and Jiangxi Province in Yangtze River on nearby areas, the river regime variation and erosion-deposition variation of ri-verbed in the sand mining area in recent years were analyzed by using long-term hydrology and sedimentation data of Hankou Hydrological Station, water level data of Wuxue Station and 8 times’ measured topography data from 2006 to 2013. The results show that the river regime was stable;the erosion and deposition occurred alternatively in the sand mining area;the riverbed evo-lution was obviously influenced by talweg swing. It was suggested that the riverbed evolution in this reach and the nearby areas in-fluenced by sand mining should be closely monitored so as to ensure the stability of river regime and flood control safety.%为了准确把握长江鄂赣边界重点河段采砂活动对附近区域的影响，利用汉口站长系列的水文泥沙数据、武穴站的水位以及2006~2013年8个测次的实测地形，分析了该河段近年来的河势变化及采砂区范围内的河床冲淤变化。结果表明，该河段河势总体较为稳定，采砂区内河床呈现冲淤交替的变化特性，河床变化受深泓摆动影响明显。建议密切监测该河段尤其是采砂区附近河床的演变趋势，以保证河势稳定与防洪安全。