2016年长江流域水资源量分布特征分析

Analysis on distribution characteristics of water resources in the Yangtze River basin in 2016

根据2016年《长江流域及西南诸河水资源公报》,对长江流域的降水量、地表水资源量、地下水资源量的特征进行了分析。分析结果表明:(1)2016年长江流域的年降水量为1 205.3 mm,较常年值偏多10.9%;(2)地表水资源量为11 796.7亿m^3,比常年值偏多19.7%;(3)地下水资源量为2 706.5亿m^3,比1980~2000年的平均值偏多8.6%;(4)水资源总量为11 947.1亿m^3,比常年值偏多20.0%。分析还表明:2016年长江流域的降水、径流高值区主要分布在鄱阳湖水系、湖口以下干流和太湖水系,3个区的降水、地表水资源量较常年偏多20.0%,40.0%以上;湖口以下干流和太湖水系的降水、地表水资源量、地下水资源量均居其区域系列第1位;降水及地表水资源量的年内集中度也比常年高。

According to the ＂ 2016 Water Resources Bulletin of the Yangtze River Basin and Southwest Rivers＂,the characteristics of precipitation,surface water resources and groundwater resources in the Yangtze River basin are analyzed. The results show that：（1） annual precipitation is 1 205. 3 mm in 2016,10. 9% higher than the mean annual value;（2） surface water resources amount is 1. 179 67 × 10^（12） m^3,19. 7% higher than the mean annual value;（3） compared to the average value from 1980 to 2000,the amount of groundwater resources is 2. 706 5 × 10^（10） m^3,which is 8. 6% higher than mean annual value. The total amount of water resources is 20% higher than the mean annual value,which is 1. 194 71 × 10^（12） m^3. The areas with high precipitation and runoff values are mainly distributed in Poyang Lake system,main stream below Hukou and Taihu Lake basin. The amount of precipitation and surface water resources in these three areas respectively exceed 20% and 40% than the usual year. The amount of precipitation,surface water resources and groundwater resources in the main stream below Hukou and Taihu Lake basin are all ranked first in the regions. Precipitation and surface water resources in 2016 are more concentrated than the usual year.