摘要
引入水质健康风险综合评价理念,将水质评价指标分为感官指标、综合指标和毒理指标等3个类别,采用综合污染指数法对2018年巴中市大佛寺地表饮用水源地水质监测数据进行分析评价。结果表明,大佛寺断面水质健康风险综合指数年均值为0.79,水质健康风险评价结果为优,水质清洁,基本没有健康风险。综合类污染物对该断面的水质健康风险的评价结果影响最大,逐步回归分析表明,高锰酸盐指数、氨氮、粪大肠菌群、总磷、总氮与水质健康综合污染指数呈极显著或显著相关关系,化学需氧量、五日生化需氧量与水质健康综合污染指数的关系不显著。为了更好的保护巴中城市饮用水源,结合水质综合评价结果与区域现状,大佛寺地表水水源地污染防治工作重点需加强跨河桥段营运期废水收集、强化场镇污水处理设施建设、科学引导区域水环境管理与风险防范。
By introducing the concept of comprehensive evaluation of water quality health risk,the water quality assessment indicators are divided into three categories:sensory indicators,comprehensive indicators and toxicological indicators.The monitoring data of surface drinking water source in dafosi of Bazhong City in 2018 were analyzed and evaluated by comprehensive pollution index method.The results showed that the annual average value of the comprehensive water quality health risk index of the Dafosi section was 0.79,and the water quality health risk evaluation result was excellent.The water quality was clean and there were basically no health risks.Comprehensive pollutants have the greatest impact on the evaluation results of the water qualityhealth risk of this section.The stepwise regression analysis showed that the permanganate index,ammonia nitrogen,fecal coliforms,total phosphorus,total nitrogen and water quality health comprehensive pollution index were extremely significant or Significant correlation,and there was no significant relationship between chemical oxygen demand,5-day biochemical oxygen demand and comprehensive pollution index of water health..In order to better protect the drinking water source of Bazhong City,combining with the results of comprehensive water quality evaluation and the current situation of the region,the focus of pollution prevention and control of the surface water source of Dafosi needs to strengthen the collection of wastewater during the operation period of the cross-river bridge,and strengthen the construction of sewage treatment facilities in the town.Scientifically guide regional water environment management and risk prevention.
作者
黄亿
吴艳
袁泉
张绍斌
HUANG Yi;WU Yan;YUAN Quan;ZHANG Shao-bin(Bazhong Ecological Erwironment Monitoring Center Station,Bazhong,Sichuan 636000,China;Ecological Environment Bureau of Bazhong City,Bazhong,Sichuan 636000,China)
出处
《四川环境》
2022年第2期171-179,共9页
Sichuan Environment
关键词
地表饮用水
水质健康风险评价
综合污染指数
Surface drinking water
health risk assessment
comprehensive pollution index
