改进的综合水质标识指数法在河流水质评价中的应用

Application of Improved Comprehensive Water Quality Identification Index Method in River Water Quality Assessment

本文采用综合水质标识指数法对鞍山市境内太子河干流河段进行水质评价,选取算数平均数法、超标倍数法、熵值赋权法3种不同的权重计算方法进行比较,以了解不同赋权方法在水质评价工作应用中对评价结果的影响及目标河段的综合水质情况。通过比较分析,熵值赋权法相较于其他两种权重计算方法更客观合理,评价结果能够较为科学地反映目标河段的综合水质情况。

This paper adopts the comprehensive water quality identification index method in the river water quality assessment of the main stream of Taizihe River in Anshan. Three different weight calculation methods,namely,arithmetic mean method,superstandard multiple method,entropy weight method,are selected and compared to understand the impact of different weight methods on the evaluation results and the comprehensive water quality of the target reach in the application of water quality assessment. Through comparative analysis,the entropy weight method is more objective and reasonable than the other two weight calculation methods,and the evaluation results can reflect the comprehensive water quality of the target reach more scientifically.