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我国是一个水资源短缺、水旱灾害频繁的国家。降水资源总量约6亿吨，平均年径流总量为27115亿立方米，扣除重复计算量，我国的多年平均水资源总量为28124立方米。按水资源总量考虑，我国居世界第六位。但我国人口众多，人均水资源不到世界人均水资源的1／4，人均水资源占有量在世界各国排名中仅列第121位，被联合国列为13个贫水国
Our country is a country with a shortage of water resources and frequent floods and droughts. The total amount of precipitation is about 600 million tons, with an average annual runoff of 2.7115 trillion cubic meters. After deducting the amount of double counting, China’s average water resources for many years is 28,124 cubic meters. According to the total amount of water resources, China ranks sixth in the world. However, with a large population and a per capita water resource of less than one quarter of the world’s per capita water resources, per capita water resources rank only the 121st among the countries in the world in terms of rank and ranking as the 13 countries of the poor by the United Nations