长江河流研究进展

Advances in river research of Yangtze River

对1950年以来长江河流研究工作的进展作了简要综述。内容包括:长江流域来沙特性、长江中下游河道演变特点、河道整治的主要经验以及相应的研究成果。指出:长江上游干流悬移质泥沙主要来源于金沙江和嘉陵江,以宜昌站为代表,分别占50.9%和24.0%;长江中下游河道演变受自然因素和人为因素的双重影响,且人为因素日益增强;加强河道演变观测分析,掌握河道演变规律,是实施河道整治工程的基础工作和必要条件;河道整治工程的规划、设计必须与河道演变观测、河工模型试验和数学模型计算相结合。

We summarize the advances in river research of Yangtze River since 1950,including the features of incoming sediment,the characteristics of river evolution in the middle and lower reaches of Yangtze River,the main experiences in river regulation and the research results concerned.It is pointed out that,the suspended sediment in the upper reach of the river comes from Jinsha River and Jialing river,accounting for 50.9% and 24% respectively at Yichang station;the river evolution in the middle and lower reaches is influenced by natural and human factors,and the later becomes increasingly serious;it is the base and necessary conditions of river regulation to strengthen observation and analysis of river evolution and understand the laws of river evolution;the plan and design of river regulation works shall be combined with river evolution observation,river model test and mathematical model calculation.