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中文摘要：
于2011年1月采集乌梁素海表层水样,对湖水中重金属Hg含量进行分析.结合Hg的空间分布特征,利用单因子指数综合污染评价指数与健康风险评价模型对Hg污染程度与风险进行评估.结果表明,乌梁素海表层水体中Hg的平均浓度为1.04μg/L,所有监测点Hg的含量都超出地表水Ⅲ类标准和国家渔业用水标准,50％的监测点超出了地表水Ⅳ类标准.水体中Hg的分布模式与流域排污口位置、入湖口及水动力条件有一定关系,高值区域分布在入湖口相对集中的西北与东北部,湖泊南部与出口处的含量相对较低,处于中等水平.乌梁素海湖水中Hg的非致癌性污染物所致的健康危害风险度介于0.75×10^-9 ～2.15×10^-9a-1之间,Hg所致的健康危害风险度的贡献率在71.43％～ 92.44％之间,表明Hg污染水平与健康风险都较高,应该给予特别关注.
英文摘要：
To understand the heavy metal mercury levels in the surface water of Lake Ulansuhai,samples were collected in January 2011.The total mercury concentration was analyzed.Distribution characteristics,pollution levels and health risk assessment were revealed by GIS,Pollution Evaluation Index and Health Risk Assessment Model.The average mercury concentrations in surface lake water were 1.04 μg/L,indicating a relatively high content of mercury.All sampling contents were beyond the first surface water standards and national fisheries standards,and 50％ samples were beyond the fourth surface water standards.The high mercury concentrations at the inlet of the lake,while the low concentrations at the outlet of the lake.Considering the health risk caused by non-carcinogen in the water,the risk levels ranged from 0.75 × 10-9 to 2.15 × 10-9a-1.The contribution rate of mercury is 71.43％-92.44％.The mercury pollution and risk is high and should pay more attention on that.
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Variability of water quality in wuliangsuhai lake receiving drainage water from hetao irrigation sys
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