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中文摘要：
目的了解乌梁素海湖泊水体中重金属浓度及空间分布特征。方法于2011年1月，采集乌梁素海湖泊水体水样，测定重金属Cu、Zn、Pb、Cr、Cd、Hg、As的浓度。采用单因子指数评价模型对重金属污染程度进行评估；采用ArcGIS9．2进行空间插值，分析7种重金属空间分布特征。结果水体中不同重金属的浓度由低到高依次为Cd〈Hg〈Pb〈Cr〈As〈Cu〈Zn。全部水样中的Hg浓度均超标，只值均大于1；其他重金属的只值均小于1。重金属高值区集中于湖泊入水口集中处与湖泊出水口处，湖泊中部多为低值区与中值区。7种重金属的空间分布可划分为：入水口点源发散状高Hg-Zn—Cr区；出水口条带状高Cu—Pb—Cd—As区；入水口-出水口联片条带状高Cu—As区。结论乌梁素海水中重金属Hg污染水平较高，应给予关注。
英文摘要：
Objective To explore the spatial distribution characteristics of heavy metals in the Ulansuhai Lake. Methods The water samples were collected in Jan, 2011, and the concentrations of Cu, Zn, Pb, Cr, Cd, Hg, As were determined. The heavy metal pollution was evaluated by the single factor index evaluation model and ArcGIS 9.2 was used for spatial interpolation to analyze the distribution characteristics of heavy metals. Results The concentration of heavy metals in water followed the order of Cd〈Hg〈Pb〈Cr〈As〈Cu〈Zn, and the Pi value followed the order of Hg〉Cu〉Zn〉As〉Cr〉Pb〉Cd. The levels of Hg in all water samples exceeded the standard,with Pi〉l.The Pi values were less than 1 for the measured heavy metals except for Hg. Waters with higher concentrations of heavy metals focused in inlet and outlet of lake,lower and moderate levels in the middle of lake. The spatial distribution of heavy metals were characterized by diverging spot source with higher Hg-Zn-Cr in inlet of lake, zonal area with higher Cu-Pb-Cd-As in outlet of lake, and linked zonal area with higher Cu-As in the middle of lake. Conclusion More attention should be oaid to severe water oollution by He in Ulansuhai Lake.
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