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about 88.21%. The sediment trap amount of the reservoir group in the middle reach of Jinsha river is about 2.08×108t during year 2011 to 2016. REFERENCES [1] WANG GUOQING,ZHANG JIANYUN,THOMAS C P ,et al. Identifying contributions of climate change and human activity to changes in runoff using epoch detection and hydrologic simulation. Journal of Hydrologic Engineering. 2013,18( 11) : 1385 -1392. [2] ZHANG XINBAO，WEN ANBANG，WALLONG D E，et al． Effects of large-scale hydropower reservoirs on sediment loads in Upper Yangtze River and its major tributaries. Journal of Sediment Research, 2011 (8) : 59 -66. [3] YANG X，LU X． Estimate of cumulative sediment trapping by multiple reservoirs in large river basins: An example of the Yangtze River basin. Geomorphology, 2014，227: 49-59. [4] ZHOU Y, PERSAND N, WANG H. Scale invariance of daily runoff time series in agricultural watersheds[J]. Hydrology and Earth System Sciences, 2006,10:79-91. [5] GOCIC M，TAJKOVIC S． Analysis of Changes in Meteorological Variables Using Mann-Kendall and Sen's Slope Estimator Statistical Tests in Serbia. Global and Planetary Change, 2013( 100) : 172-182. [6] XU JIONGXIN. Recent variation in water and sediment in relation with reservoir construction in the upper Changjiang River basin. Journal of Moutain Science，2009, 27( 4) : 385-393. [7] CHEN SONGSHENG，ZHANG OUYANG，CHEN ZEFANG，et al. Variations of runoff and sediment load of the Jinsha River . Advances in Water Science. 2008,19( 4) : 475-482. [8] YANG, S. L., ZHANG, J., ZHU, J.,etal. Impact of dams onYangtze River sediment supply to the sea and delta wetland response. Journal of Geophysical Research. 2005, 110. 328