五元系数法-改进熵权法在水质评价中的应用  

Application of five-element connection number method-improved entropy method in water quality evaluation

作　　者：宋丽婧 魏琛[1] 宋玲梅 

机构地区：[1]贵州大学土木工程学院,贵阳550025

出　　处：《南水北调与水利科技》2015年第2期268-273,共6页South-to-North Water Transfers and Water Science & Technology

基　　金：贵州省科技计划课题"贵州省城市典型饮用水源地面源污染及自动监测设施智能运维系统研究与示范"(黔科合SY字[2014]3045号);贵州大学研究生创新基金项目(研理工2014603)

摘　　要：为了使水质监测值和水体划类标准值之间关系更紧密,利用五元联系数方法建立了各水质评价指标与评价标准的五元联系数;同时在传统熵权计算的基础上,采用秩比法设定偏好校正系数,得到改进的熵权重;最后将五元联系数ui和改进的熵权重WRi相结合获得五元综合联系度,据此对水质进行评价,这是一种主客观结合的、符合实际情况的水质评价新方法。以贵州贵阳市河流断面监测数据为例,评定样本点所在河段水质等级,分析了该河流水质变化趋势,验证了五元系数法-改进熵权法水质评价方法的实用性。To tight the relationship between the water quality monitoring value and water classified standard,the five-element connection number method was used to establish the five-element connection numbers of the evaluation criteria for various indicators of water quality evaluation.On the basis of traditional entropy weight calculation,the rank method was used to set the preference correction coefficients and then to obtain the improved entropy weights.The five-element connection number ui was combined with the improved entropy weight WRi to obtain the comprehensive five-element connection for water quality evaluation.This is a newly combined objective and subjective method for water quality evaluation.The method was applied to evaluate water quality grade and analyze the variation trend of water quality in a river of Guiyang City of Guizhou Province based on the monitoring data of a cross section,which verified the applicability of the five-element connection number method-improved entropy method in water quality evaluation.

关 键 词：改进熵权法 五元联系数 水质评价 因子分析 水质变化趋势 

分 类 号：X824[环境科学与工程—环境工程]