水资源短缺、水污染加剧、地下水超采和用水效率低下正在不断加剧我国水资源需矛盾,目前我国600多个城市中,有三分之二的城市常年处于供水不足状态。到20世纪末,全国400多个存在水不足问题的城市中,比较严重的缺水城市达110个,全国城市缺水总量为60亿立方米,水利部预测2030年中国人 The shortage of water resources, intensified water pollution, over-exploitation of groundwater and inefficient use of water are aggravating the contradiction between water resources in our country. At present, two-thirds of cities in over 600 cities in China are in a state of insufficient water supply. By the end of the 20th century, among the more than 400 cities in China that lacked water, there were 110 water-scarce cities with a serious shortage of water and a total of 6 billion cubic meters of water shortage in urban areas. The Ministry of Water Resources predicts that 2030 Chinese