南水北调东线工程通水后沿线湖泊水质评价

Water Quality Assessment of Dongping Lake along the East Route since the South to north Water Diversion Project Put into Use

中文关键词:  南水北调  东平湖  重金属  综合污染指数  综合水质评分

英文关键词::South to north water deversion project  Dongping Lake  Heavy metals  Comprehensive pollution index  Comprehensive water quality score

中文摘要:

      为了解南水北调东线工程通水后沿线湖泊水质状况,于2015年6月(枯水期)采集了东平湖4个地表水样品和7个地下水样品,测定了其中As、Cd、Cr、Cu、F、Hg、Mn和Pb等8种元素的含量,采用综合污染指数法、综合水质评分法和健康风险评价模型评价了水环境质量和健康风险。结果表明,地表水中重金属浓度多数满足地表水环境质量标准I类,其中Hg污染相对较重；地下水中重金属浓度多数满足地下水质量标准III类及以上,其中F和Mn污染相对较重。4个地表水采样点综合污染指数均小于1,表明其水质优良；地下水中3个采样点的综合水质评分小于2.5,水质良好,4个采样点的综合水质评分大于4.25,水质较差。地表水的平均健康风险为9.18×10-5a-1,地下水的平均健康风险为8.16×10-5a-1,均为III级中风险。

英文摘要:

      :In order to study the water quality of Dongping Lake along the east route after the South to north water diversion project, 4 surface water samples and 7 ground water samples were collected in June 2015 (dry season), the concentrations of 8 elements (As, Cd, Cr, Cu, F, Hg, Mn and Pb) were analyzed, and then comprehensive pollution index, comprehensive water quality score and health risk assessment were applied to evaluate the quality and health risk of the aquatic environment.Results showed that most heavy metals in surface water meet standard I of Environmental quality standards for surface water , and Hg with the most severe pollution .Then most heavy metals in ground water meet or are above standard III of Quality standard for ground water with F and Mn revealing the most serious pollution.For surface water, comprehensive pollution index of all 4 samples was less than 1, meaning its excellent quality.For ground water, comprehensive water quality score of 3 samples was less than 2.5, presenting its fine water quality while score of the other 4 samples was more than 4.25, showing its poor water quality.Average health risk of surface water and ground water was 9.18×10-5a-1 and 8.16×10-5a-1 respectively, both of them are ascribed to the medium health risk standard III .