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工业“三废”的不合理排放、农田污灌和化肥、农药的长期大量使用、城市垃圾和生活污水任意排放、矿山开采以及其他人为的污染等等都会造成地下水的污染。但是,为什么有些工业发达的城市较工业化程度较低的城市地下水的污染要轻一些?为什么同样的污染源所造成的对地下水的污染程度有很大差异?为什么没有污染源的地方地下水中有害物质的含量也很高?注意哪些问题才能减轻或防止污染?这就需要对地下水污染原因作进一步分析。
Irrational discharge of industrial “three wastes”, groundwater pollution caused by farmland sewage and long-term large-scale use of chemical fertilizers and pesticides, arbitrary discharge of municipal solid waste and domestic sewage, mine exploitation and other man-made pollution can cause pollution. However, why some industrialized cities are less polluted than groundwater in less industrialized cities, and why there is a big difference in groundwater pollution caused by the same polluters and why groundwater is not polluted Is also high? Pay attention to what issues can reduce or prevent pollution? This requires further analysis of the causes of groundwater pollution.