The thesis adopts the method of macroscopical statistics combined with the method of typical investigation.

本研究主要采用了宏观统计与典型调查相结合的研究方法.

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Through the typical investigation in Honghu City, the cause of forming non - point source pollution was analyzed.

通过对洪湖市的典型调查, 分析了农业 非 点源污染的形成原因,探讨了防治非点源污染的措施.

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