西江干流泥沙冲淤变化分析

应用控制水文站站年的实测水沙资源及插补，延长所得站年资料，采用输沙平衡法，河流横断面历史演变法、上下游沙量相关法进行了河床演变分析和河流泥沙冲淤变化研究，其主要结果是，珠江干流天峨－梧州4个区段中，各区段差异较大，年际之间，时段之间有冲有淤，但总体上均有淤积，其中天峨－迁江区段淤积最多，主要淤于大北，岩滩库区，未受拦河工程影响的干流河道并无明显淤积，基本保持水沙平衡。

Analysis of Change in Scour and Silting of Sediment in the Mam Stem of West River

Based on measured station year data of flow and sediment at control hydrologic stations and station year data interploated and exted-ed, studies on riverbed evolution and change in scour and silting of sediment were carried out by means of such methods as sediment transport balance, historical evolution of river section and correlation of sediment between upstream and downstream. It is concluded that in 4 sections from Tiane to Wuzhou on the main stem of the West River, situation differs from one another: both scour and silting occur in years and time intervals, with silting being predominant in general, especially in reservoirs Dahua and Yantan in the section from Tiane to Qianjiang. Silt-discharge rating remains in balance without significant accretion in river courses not affected by river barrages.