论文部分内容阅读
我国人均占有淡水资源不丰富,且时空分布极为不均,相当一部分地区水资源十分缺乏。随着经济的发展、城市人口的不断增加,城市用水量持续增长,水的供需矛盾日益突出,用水短缺已成为我国当前的突出问题之一。同时,工业废水和城市污水日益增多,废污水排入水体后,不仅给地表水和地下水
China’s per capita possession of freshwater resources is not rich, and very uneven distribution of space and time, a considerable part of the water resources are very scarce. With the economic development, the urban population is increasing, the urban water consumption continues to grow, and the contradiction between supply and demand of water is becoming increasingly prominent. The shortage of water has become one of the prominent problems in our country. At the same time, industrial wastewater and urban sewage are increasing day by day. After the waste water is drained into the water body, not only the surface water and groundwater