重庆嘉陵江干流饮用水水源地水质分析与健康风险评价

Water Quality Analysis and Health Risk Assessment for Drinking Water Sources at Chongqing Section on Jialingjiang River

利用形QI模型和水环境健康风险评价模型对2009-2011年嘉陵江干流重庆段6个饮用水水源地进行评价，并将影响这两种方法的主要因素进行分析比较。结果表明，6个水源地水质总体较好且城郊差异不大，但健康风险等级普遍偏高，城区明显高于郊区；各污染物都可能影响到形凹值，而砷、镉尤其是六价铬等化学致癌物是影响总健康危害风险的主要因素。两种模型侧重点不同，综合运用将更有助于客观全面评价水体质量和对人体健康的影响。

Assessment for the six drinking water sources at the Chongqing section on the Jialingjiang River from 2009 to 2011 was made based on the WQI model and the water environmental health risk analysis model, and the difference between the main factors of the two methods was compared. The results show that the water quality of these water sources is still good in general, and there is a little difference between urban and suburban, but the health risk level for individual person is generally high, and that in the city is higher than that in the suburb. Various kinds of pollutants are possible to affect the WQI value while the carcinogens （As, Cd, and especially Cr6＋）are the main factors affecting R z- The two models have different emphasis, using WQI model and the water environmental health risk analysis model will be beneficial to assessing the water quality and the impact on human health objectively and comprehensively.