1　前言中国水资源的总量 2 810Ｇｍ3总量不算太少。但按 1997年人口耕地计算 ,人均水资源 2 2 0 0ｍ3,仅相当于世界人均占有量的 1/ 4 ;亩均水资源 190 0ｍ3,相当于世界亩均占有量的 4 / 5,平均量明显偏少。我国在世界 153个国家的人均水资源资料的排位中居12 1位 ,根据“国际 1 Introduction China’s total water resources 2 810Gm3 total amount is not too small. However, according to population arable land in 1997, the per capita water resource was 2200m3, which is only 1/4 of the world average. The average water amount per acre was 190m3, equivalent to 4/5 mu of the world’s mu, the average amount was obviously Less than normal. China ranks 153th in the world in per capita water resources ranking of 12 1, according to "International