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我国是一个干旱缺水严重的国家,全国水资源总量为2.8万亿m~3,位居世界第6位,但人均占有量却非常少,仅有2400m~3,相当于世界人均的1/4,居世界第109位。中国已被列为世界人均水资源13个贫水国家之一。目前,全国600多座城市中,有300多座城市缺水,其中严重缺水的有108个。再加上水污染的日益加重,更使水资源短缺现象日趋严重,不仅成为农业发展的主要制约因素,而且对整个国民经济的发展和人民生活水平的提高都产生了重大影响。解决水资源短缺的有效途径是开源和节流,开源是
China is a country suffering from severe drought and water shortage. The total water resources in the country is 2.8 trillion m3, ranking the 6th in the world, but its average per capita is very small, only 2,400 m3, which is equivalent to 1 / 4, ranking the 109th in the world. China has been listed as one of the 13 water-poor countries in the world in terms of per capita water resources. At present, over 300 cities across the country have more than 300 water shortages, of which there are 108 in serious water shortages. Coupled with the increasing water pollution, more and more serious water shortages have not only become the major constraints on agricultural development, but have also had a significant impact on the development of the entire national economy and the improvement of people’s living standards. An effective way to solve the shortage of water resources is to open source and reduce expenditure