According to the measured water and sediment data,using comparative analysis,the paper analyzed systematically the effects of store water application of the Three-Gorges reservoir on Yangtze river on water and sediment characteristics in the Dongting lake.The results indicated that:(1)The ratios of split-flow and sediment diversion at the three outfalls of Jingjiang river reduced separately from 18.5%,21.4% to 11.7% and 13.6%,which resulted in that the proportions of runoff and sediment discharge via the th...