长江河口口外海滨区域悬沙浓度分布特征研究  

Characteristics of suspended sediment concentration in the offshore area of Yangtze estuary

作　　者：黄李冰[1] 李义天[1] 孙昭华[1] 樊咏阳[1] 杨云平[1] 

机构地区：[1]水资源与水电工程科学国家重点实验室,武汉大学,武汉430072

出　　处：《水力发电学报》2014年第6期155-161,167,共8页Journal of Hydroelectric Engineering

基　　金：国家973计划项目(2010CB429002)

摘　　要：根据近期50年长系列长江口水流、含沙量等资料,采用数据分析方法,研究了长江河口口外海滨区域(122°E-123°E)悬沙浓度分布特征及其变化趋势。结果表明:在长江口外海滨区域存在一个,有时甚至两个高悬沙浓度区——由于径流的控制作用,使得无论在洪枯季或大小潮情况下,均在南槽口外形成高悬沙浓度区;其中当径流作用相对较弱时,部分入海泥沙沿东北偏北方向运动,形成第二个高悬沙浓度区。近年来南槽口外的高悬沙浓度区位置有南偏趋势,南、北槽分流分沙比变化是其南偏的主要原因。This is to study the characteristics and variation trends of suspended sediment distribution in the offshore area of the Yangtze estuary （122°E-123°E）, with methods of data analysis and on the basis of a long-term data series of flow and sediment concentration observations in this estuary during recent 50 years. The results show that in this area there exist one or even two high-concentration centers of suspended sediment--under control of the river runoff, they always occur outside the south estuary passage whether in flood or dry season and in spring or neap tide. The second high-concentration center appears when the runoff control effect is relatively weak and one portion of the sediment load in the estuary mouth moves in NNE direction. In recent years, its location tends to shift southward, largely as a result of the change in both the flow and sediment transport ratios of the south and north branches of the estuary.

关 键 词：河流泥沙工程学 长江河口 悬沙浓度 分布特征 变化趋势 

分 类 号：TV142.3[水利工程—水力学及河流动力学]