农业现代化研究2012，Vol.33Issue(2)：203-206,4.
荆江三口入洞庭湖水沙演变及成因分析
Runoff and Sediment Discharge into Dongting Lake from Three Channels, Jingjiang River
摘要
Abstract
Based on hydrological data from 1956-2008 of representative gauging stations, the evolution processes and its reason of annual runoff and sediment discharge in Zhicheng and Three Channels were investigated, using Mann-Kendall trend test and other analyses. The results showed that annual runoff of Zhicheng was relatively lower after 2003, which might be related to lower precipitation in the upper reaches of Yangtze River. However, this change was insignificant. Annual runoff in Zhicheng, annual runoff and sediment discharge in Three Channels, as a whole, were significantly decreasing tendency, and the abrupt time was 2003, 1979 and 1989, respectively. Annual runoff in Three Channels only had a turning point in 1973, while annual sediment discharge had two turning points in 1973 and 2003, respectively. Turning point in 1973 was primarily caused through decreased runoff by the cutoff in Jingjiang River, and the turning point in 2003 was mainly caused through decreased suspended sediment concentration by the running of Three George Reservior.关键词
荆江三口/突变/水文过程/水利工程Key words
Three Channels in Jingjiang River/abrupt change/hydrological process/hydrological engineering分类
农业科技引用本文复制引用
谢永宏,李峰,陈心胜,侯志勇..荆江三口入洞庭湖水沙演变及成因分析[J].农业现代化研究,2012,33(2):203-206,4.基金项目
国家重大基础研究计划(编号:2012CB417005) （编号:2012CB417005）
中国科学院知识创新工程项目(编号:KZCX2-YW-435)和国家自然科学基金项目(编号:31070325). （编号:KZCX2-YW-435）
