人工湿地作为一种控制水环境非点源污染的有效工具，已被世界上很多国家所认可。
As an effective tool to control non-point source pollution, constructed wetlands are increasingly recognized by many countries.
在阐述非点源污染的概念、危害性的基础上，对国内外地表水环境非点源污染研究现状进行综述。
On the basis of expounding the conception, harmfulness of nonpoint source, summarize the current situation of the study of surface water environment's nonpoint source pollution at home and abroad.
非点源污染负荷在水环境污染中所占比例日益增大，而农业生产活动又是最大的非点源污染。
The proportion of non-point sources in water environmental pollution was greater than before, and farming activity was the most important factor in agricultural non-point sources.
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