长江科学院院报Issue(2)：11-13,19,4.DOI:10.3969/j.issn.1001-5485.2015.02.003
三峡工程运行后长江中下游河道设计频率水文年泥沙模拟研究
Study on the Simulation of Sediment in Hydrological Year of Designed Frequency in the Middle-Lower Reaches of Yangtze River after the Three Gorges Project Operation
李振青 1吴昌洪 1李会云 1杜晓阳2
作者信息
- 1. 长江科学院河流研究所，武汉 430010
- 2. 长江科学院空间信息技术应用研究所，武汉 430010
- 折叠
摘要
Abstract
The water flow and sediment in Yangtze River have changed remarkably since the operation of Three Gor-ges Reservoir.To provide guarantee and basis for the simulation of hydrological conditions in sediment model calcu-lation,we statistically analysed the variation of sediment in the middle-lower Yangtze River since the Three Gorges Reservoir impoundment.On this basis,we carried out detailed research on the sediment problem of hydrological year of designed frequency which is often selected in sediment model calculations and tests.We proposed the meth-od and approach of dealing with sandy sediment in sediment model which is to deduce the sediment process of de-signed flood according to the relationship between flow rate and sediment transport rate.Moreover,in consideration of project safety,we proposed to take the lower enveloping curve of flow rate versus sediment transport rate as the basis of determining sediment process.Through this method,the sediment condition in hydrological year of de-signed frequency when sediment load decreases could be well reflected.关键词
三峡工程/长江中下游/泥沙模型/床沙质/设计频率水文年Key words
Three Gorges Project/middle-lower reaches of Yangtze River/sediment model/bed material load/hydrological year of designed flood frequency分类
建筑与水利引用本文复制引用
李振青,吴昌洪,李会云,杜晓阳..三峡工程运行后长江中下游河道设计频率水文年泥沙模拟研究[J].长江科学院院报,2015,(2):11-13,19,4.
