On the basis of hydrological data from 1951 to 2009 of four representative gauging stations （Xiang- tan, Taojiang, Taoyuan, Shimen）, the changes of runoff and sediment discharge into Dongting Lake from the Four Rivers （Xiang River, Zi River, Yuan River and Li River） in Hunan Province were investigated using Mann-Kendall trend test, moving average value and double mass analysis. The results showed that annual run- off was highest in Xiang River （657 x 108m3）, intermediate in Yuan River （640 x 108m3） and Zi River （229 x 10Sm3）, and lowe...
