资料显示下个世纪全世界将有十多亿人缺水。我国是世界上110个缺水国家之一,排行第88位(排行越往后缺水越严重),人均水资源不足世界人均水资源的1/4(约2700m~3/a)。目前全国有100多个严重缺水的城市。我国全年水量约5000亿立方米,到下个世纪中叶将达到8000亿立方米,缺水的 Statistics show that over one billion people in the world will be short of water in the next century. As one of the 110 water-scarce countries in the world, China ranks 88th (the more serious the water scarcity is afterward), and the per capita water resources are less than 1/4 of the world’s average water resources (about 2700m 3 / a). There are currently over 100 cities in the country suffering from severe water shortages. China’s annual water volume of about 500 billion cubic meters, by the middle of the next century will reach 800 billion cubic meters, water shortage