基于综合指数法的城市河流水环境质量排名探讨

Discussion on Quality Ranking of Urban River Water Environment Based on Comprehensive Pollution Index

依据城市河流水环境质量状况进行定期排名,是目前环境管理者为促进地表水环境质量改善的一种政策措施,采用正确的排名方法是保障排名结果是否合理的关键。研究选用综合污染指数法、水质类别法两种常用的评价方法,同时结合城市河流黑臭、浑浊等特点,筛选出pH、溶解氧、色度、化学需氧量、悬浮物、氨氮、总磷7项因子参与评价并对河南省辖内的城市河流进行排名。结果表明,选用的排名方法基本满足城市河流水环境质量排名的需求,具有广泛的应用价值。

According to the water quality to proceed the unban river ranking at fixed period is a policy measure that the environmental administrator adopt for promoting the improvement of surface water quality. The corrected ranking way is the key safeguard for the reasonable ranking results. This study selected two common evaluation methodology such as the comprehensive pollution index and water quality category,and combined with the characteristics of urban river such as black bad smell and turbid,to screen out seven pollutants including p H,dissolved oxygen,chroma,chemical oxygen demand（ COD）,suspended solids,ammonia nitrogen,total phosphorus to participate in ranking the river quality in Henan province. The results showed that the ranking way could basicallied satisfied the needs of ranking the urban river water quality,which has extensive application value.