灰色加权关联度法用于水环境功能评价

Research on grayweighted correlation method for evaluation of water environment functional

摘要:

地表水水质的好坏可以影响到水环境功能是否能够发挥其应有的作用．因此,对地表水水质评价问题一直是环境科学研究的热点问题．本文在调研分析常用水质评价方法的基础上,提出了水环境功能区灰色加权关联度综合评价法．以松花江哈尔滨段为研究对象,对典型监测断面2009年的水质监测数据进行评价分析,结果表明:相比传统的等权灰色关联度法,灰色加权关联度法依据不同断面的功能区类别确定出评价指标的权重值,能够强化浓度过高指标的影响,同时兼顾到每一个指标对水环境质量产生影响的综合效应,从而提高了评价结果的准确性．

Abstract:

Based on analysis of commonly used water quality evaluation methods, the weighted gray correlation method was proposed in this paper. A case study of Songhua river in Harbin section was carried out by the water monitoring data in 2009, and it showed that, contrasted to the traditional equal weight gray correlation method, the grey weighted correlation method, according to different functional of every section, could determine the evaluation indicator’s weights, strengthen the impact of concentrations of indicators, and consider every indicator’s impact, so that the accuracy of water evaluation results could be improved.