乌江为长江上游右岸最大支流，流域面积 ８７ ９２０ｋｍ２。在大量统计乌江流域干支流各主要测站水文气象资料的基础上，分析了流域内的气象、径流、输沙量等年内年际变化及地区分布规律和干流年最大洪峰统计参数变化规律等；初步分析了上游大型水利工程对流域水文特性的影响。 The Wujiang River is the largest tributary of the right bank of the upper reaches of the Yangtze River, with an area of ​​87 920 km2. On the basis of a large amount of hydrological and meteorological data of major stations in the main tributaries of the Wujiang River Basin, the annual variation of the weather, runoff and sediment load in the basin, the regional distribution laws and the variation rules of the maximum peak statistical parameters in the main stream are analyzed. The influence of upstream large-scale water conservancy project on the hydrological characteristics of the basin was analyzed preliminarily.