以底栖动物作为底层水环境和底泥环境长期影响的指标，利用生物指数和种群结构的变化对底质进行评价和分析。
The ground base was evaluated and analysed by using biological index and variation of population of benthon which are effected by bottom water and mud environment.
将改进的尼梅罗指数法应用于磐石市地下水环境质量评价，结果表明改进的方法更客观、合理。
The application of the improved Nemerow index method to the evaluation of the groundwater quality in Panshi City shows more objective and logical results.
针对水环境质量的均值污染指数评价方法的缺点，提出了利用活性污染指数法来评价微污染水体环境。
Based on the shortcoming of the method of average pollution index assessment, this paper put forward the method of active pollution index to assess the environment of polluted river water.
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