随着人口剧增和经济高速发展 ,水的供求矛盾已成为制约我国工农业生产和城市发展的瓶颈。２０１０年后 ,我国将进入严重缺水时期。２０１０年我国工业、农业、生活及生态环境总需水量在中等干旱年为６９８８亿立方米 ,供水总量６６７０亿立方米 ,缺水３１８亿立方米。这表明 , With the rapid population growth and rapid economic development, the contradiction between supply and demand of water has become a bottleneck that restricts the industrial and agricultural production and urban development in our country. After 2010, China will enter a period of severe water shortage. In 2010, the total water demand of China’s industry, agriculture, living and ecological environment was 698.8 billion cubic meters during the moderate drought year, with a total water supply of 667 billion cubic meters and a water shortage of 31.8 billion cubic meters. This indicates ,