关键词: 水沙情势; 水文改变度; 累积量斜率变化率法; 乌江流域; 气候变化;

Abstract: In order to analyze the characteristics of hydrological trend and its main driving forces in Wujiang River Basin, Mann-Kendall non-parametric test, sliding t-test and accumulation curve were used to study the variation trend and abrupt change characteristics of sediment discharge, runoff and sediment discharge at Wulong Station from 1965 to 2017.The cumulant gradient change rate method was used to quantitatively analyze the contribution rate of climate change and human activities to sediment discharge and runoff change in Wujiang River Basin.River Impact Factor(RI) was used to analyze the change degree of water and sediment regime in Wujiang River.The results showed that the runoff, rainfall and sediment transport in the Wujiang River Basin all displayed a decreasing trend.The decreasing rate of sediment transport was the most significant.Climate change and human activities were the main driving factors for the decrease of runoff and sediment change.The runoff in Wujiang River Basin changed slightly but the sediment discharge changed seriously.

Key words: water and sediment regime; hydrologic alteration; slope change rate method of cumulant; Wujiang River Basin; climate change;