洞庭湖区浅层地下水安全供水研究

应用模糊综合评价方法，选取浓度和毒理性双权重对洞庭湖区浅层地下水进行了环境质量评价，认为湖区浅层地下水主要遭受总铁、锰、pH值、氨氮、亚硝酸盐氮、硝酸盐氮、铍、化学耗氧量等污染，基本上没有遭受重金属污染；湖区浅层地下水水质整体较好，以优质水为主，占39．37％，合格水占26．04％；不合格水（较差水）占34．59％。在此基础上，根据不同区域水质的好坏，指出了湖区薪农村建设供水方向，并提出了若干安全供水的措施以供决策参考。

The Security of Shallow Groundwater Supply for Drinking in Dongting Lake Area

The main contaminates concentration and toxicity of shallow groundwater in Dongting Lake area （DLA） is evaluated by using fuzzy comprehensive evaluation method. The results shows that the main contaminates are total iron, manganese, pH, ammonian, nitrite nitrogen, nitrate nitrogen, beryllium and chemical oxygen demand （COD）, however, the heavy metal pollution is not found. In statistics, the quality of whole shallow groundwater in DLA is not too bad： high quality and qualified water account for 39.37% and 26.04%, respectively, while the unqualified water only accounts for 34.59%. The water supply for new rural construction is designed by considering the different water quality in different area in DLA, and some suggestion for security water supply are provided.