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淡水是人类赖以生存和发展的宝贵资源,随着世界人口不断增长,人类经济活动迅速扩展和深入,世界总耗水量大幅度增长,环境科学家预测,到本世纪九十年代,水的问题将取代能源问题而居首位。我国幅员广大,水资源的分布无论在时间或空间上都很不均匀,在我国北方地区,水源短缺问题已日趋严重。 天津地处缺水的华北地区,近年来海河上游拦蓄增多,降雨集中,存蓄能力低,在干旱年份,流域基本没有来水。地下水资源也不丰富。因目前地下水开采过量,引起严重地面沉
Fresh water is a precious resource for human beings to survive and develop. As the world’s population grows rapidly, the economic activities of human beings rapidly expand and deepen. The world’s total water consumption has risen sharply. Environmental scientists predict that by the 1990s, water problems will Take the lead in replacing the energy problem. With a vast territory, the distribution of water resources is uneven in both time and space. In northern China, the problem of water shortage has become more and more serious. Tianjin is located in a water-scarce North China region. In recent years, the interception of upper reaches of the Haihe River has increased with concentrated rainfall and low saving capacity. In drought years, there is basically no incoming water in the basin. Groundwater resources are not rich. Due to the current excessive exploitation of groundwater, causing serious ground sink