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由于工农业生产的发展和人民生活的改善,大大增加了对水量的需求。国内外经验都说明,城市发展过程中,水量的需求增加很快。日本1966至1975年工业用水每年递增9.6%,生活用水1965年至1970年每年递增5.1%。我国许多城市都越来越感到水源不
Due to the development of industrial and agricultural production and the improvement of people’s lives, the demand for water has been greatly increased. Both domestic and foreign experiences show that the demand for water increases rapidly in urban development. Japan’s industrial water use increased by 9.6% annually from 1966 to 1975, and domestic water use increased by 5.1% per year from 1965 to 1970. Many cities in our country are increasingly feeling the water is not