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据统计,我国人均占有水资源量约为2700m~3,仅为世界人均水平的1/4,属于缺水国家。随着经济建设的不断发展,工农业生产和人民生活对水的需求越来越大。近年来不少城市供水日益紧张,甚至直接影响了生产和人民生活的正常进行。目前城乡供水除各地自来水厂通过江河湖泊等水源经过处理供给用户外,还有一部分是用户通过打井直接提取自来水。长期以来,机井取水通常是打
According to statistics, China’s per capita possession of water resources is about 2700m 3, which is only 1/4 of the world average level, and it is a water-short country. With the continuous development of economic construction, the demand for water from industrial and agricultural production and people’s lives is increasing. In recent years, the water supply in many cities has become increasingly tense, even directly affecting the normal production and people’s lives. At present, urban and rural water supply, in addition to local water plants through rivers and lakes and other sources of water after processing and supply users, there is also a part of the user directly through the wells to tap the tap water. For a long time, pumping water from a well is usually