水,是有限的不可代替的宝贵资源,是人类生存的基本条件,是国民经济各项事业发展的主要制约因素。我国水资源并不丰富,人均占有量只相当于世界人均占有量的四分之一,全国有180多个城市缺水,其中有40多个城市严重缺水,北京是严重缺水的城市,人均占有量只有全国人均占有量的17％,解决城市缺水问题的主要途径是开源和节流并重,在积极进行新水源建设的同时,还必须抓好节约用 Water is a limited and irreplaceable precious resource. It is a basic condition for the survival of mankind and a major constraint factor in the development of all national economic undertakings. China’s water resources are not abundant, and the per capita occupancy is only a quarter of the world’s per capita. There are more than 180 cities in China lacking water, of which more than 40 are seriously deprived of water, and Beijing is a city that is seriously deprived of water. The average amount of per capita possession is only 17% of the national per capita consumption. The main way to solve the urban water shortage problem is to open-source and save money. In addition to actively constructing new water sources, it must also pay attention to conservation.