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1水资源形势1.1水资源现状1.1.1水资源基本情况(1)多年平均水资源量。北京市多年平均(1956—2000年)年降水量585 mm,形成地表水资源量17.7亿m3,地下水资源量25.6亿m3(扣除地表地下水重复量后地下水资源量19.7亿m3),水资源总量
1 The situation of water resources 1.1 The current situation of water resources 1.1.1 The basic situation of water resources (1) The average annual water resources. The annual average precipitation (585 mm) in Beijing for many years (1956-2000) has resulted in 1.77 billion m3 of surface water resources and 2.56 billion m3 of groundwater resources (1.97 billion m3 of groundwater after deducting the groundwater reuse). The total amount of water resources