水是一种宝贵的自然资源。目前许多地方水资源短缺,成为国民经济和社会发展的重要制约。随着城市和工业的大规模发展,水资源污染、枯竭、堵塞问题日趋突出,一些地区已发展到触目惊心的地步。它危害工农业生产,威胁人民健康,破坏生态环境,使有限的水资源被破坏,水的供求矛盾加剧。据有关 Water is a valuable natural resource. At present, water shortage in many places has become an important constraint on the national economy and social development. With the large-scale development of cities and industries, the issue of water pollution, depletion and congestion has become increasingly prominent. Some areas have developed into shocking proportions. It harms industrial and agricultural production, threatens people’s health, destroys the ecological environment, destroys limited water resources and aggravates the contradiction between supply and demand of water. It is related