The important reason of causing our country source of water supplying insufficient and national water environment pollution in some area is low water efficiency and large sewage emission.
造成我国部分地区水源供给不足和全国水环境普遍污染的重要原因是用水效率低和污水排放量大。
Therefore, it is meaningful to carry out empirical studies on the risk management theory and assessment method in terms of the accidental pollution events in source water area.
因此，从水源地安全的角度出发，针对水源地突发性污染事件进行风险评价理论及方法的实证研究，具有一定的现实意义。
The water pollution can be divided into two major categories of point source and area-source pollution according to the different way of discharge.
根据排放方式的不同，水体污染可以分为点源污染和非点源污染两大类。
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