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第一节水资源特征及水环境功能分区一、水资源基本特征 1.天然水资源贫乏,再生水资源潜力巨大本区气候比较干旱,大气降水量少,蒸发量高,水资源补给条件差。天然水资源和可利用水资源贫乏。从平均水平看,单位面积天然资源占有量24.7万 m~3/a·km~2,远低于全国平均值;人均占有量只有441m~3/a,只相当于全国平均水平的16%和世界平均水平的4%。
First, the characteristics of water resources and water environment functional division First, the basic characteristics of water resources 1. Natural water resources, huge potential for reclaimed water resources The climate in this area is relatively dry, less rainfall, high evaporation, poor water supply conditions. Natural water and poor water availability. From the average level, the natural resources per unit area occupies a volume of 247,000 m 3 / a · km ~ 2, which is far below the national average; the per capita amount is only 441 m 3 / a, only about 16% of the national average and 4% of the world average.