南水北调中线水源区与受水区旱涝特征统计

Water resources and its utilization state of the Yangtze River and the rivers in south-western China in recent 10 years

根据《中国近500年旱涝图集》资料及近年降水资料,分析了南水北调中线沿线水源区及受水各区近530a的旱涝特征,得出以下结论:各区旱涝存在不同的周期,20世纪是水源区汉江旱涝的频繁期,17世纪是供水各区旱涝频繁期;各区均存在连旱连涝特征;水源区与受水各区洪涝年同步机会多于干旱年。

Taking use of gathering data in water resources bulletin of the Yangtze River basin and the Rivers in south-western China,the variation characteristics and law of water resources quantity,water supply quantity,water use quantity in the basins are analyzed and according to the computed comprehensive water use quantity per capita in the basins,10-thousand GDP water use quantity and living water use quantity per capita etc.indexes,the variation condition of the water use indexes is analyzed.The water resources quantity of the Yangtze River Basin in recont 10 years is slightly more than that in normal years,water supplyand use quantity increase slowly,the water resources quantity per capita is lower than national average water resources quantity per capita.The water resources quantity of the rivers in south-western China is the same with that in normal years,water supply and use quantity also increase slowly,and the water resources per capita is higher than average level of the country.