自动蒸发水面高度测量检查和评定方法探讨

为探明赣江流域水库沉积物的重金属污染水平，分析测定了流域内7座中型水库沉积物中Cu、Cr、Zn、Pb、Cd、As、Hg等重金属含量，并采用地积累指数法、潜在生态风险指数法进行综合评价，同时，收集整理了库水和下游河道沉积物的污染情况进行对比分析。结果表明：流域典型水库沉积物中Cd、Cu为主要污染元素，但水库水体未受污染。地积累指数法评价结果显示，赣江流域水库沉积物Cd、Cu均属轻度污染程度，与流域内表层土壤的污染程度有关。潜在生态风险指数法结果显示，赣江流域水库沉积物重金属潜在生态风险总体处于中等风险。值得注意的是Pb元素的潜在生态风险属较强风险，其中极强风险、较强风险、中等风险的样点分别占14.28%、28.57%、28.57%。

Probe into examination and evaluation method of automatic evaporationheight surface measurement

In order to verify the level of heavy metal pollution in the sediments of the reservoirs in Ganjiang river basin,the paper measures the content of heavy metals such as Cu,Cr,Zn,Pb,Cd,As,and Hg in the sediments of 7 mediumsized reservoirs in the river basin,the geoaccumulation index method and the ecological risk index method are used for comprehensive evaluation.At the same time,the pollution of the reservoir water and sediments in downstream river is collected and analyzed for comparison.The results show that Cd and Cu in the sediments of typical reservoirs in the basin are the main polluting elements,but the reservoir water body is not polluted.The evaluation results of the geoaccumulation index method show that both Cd and Cu in the reservoir sediments of the Ganjiang river basin are slightly polluted,which are related to the pollution of the surface soil in the basin.The results of the potential ecological risk index method show that the potential ecological risk of heavy metals in reservoir sediments in the Ganjiang river basin is generally at the medium level.It is worth noting that the potential ecological risk of Pb element is relatively high,among which the samples with extremely high risk,high risk and medium risk account for 14.28%,28.57%,and 28.57% respectively.