依据污染分担率大小，划分地表水污染类型，并冠以主名称、副名称。

This paper discusses the method for classifying surface water pollution and giving it a main title as well as a subtitle according to pollution share rate.

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之后采用近地面尘降模型，计算了这类污染源在不同气象层结下的扩散状况，得出其污染浓度对大气环保浓度的分担率。

Then, the concentration under different wind diffusion condition are analysized by using ground pollution mode so that the ratio of contribution to the total pollution limit is obtained.

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