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- W2732811434 abstract "为了更好的解决环境管理中的实际问题,对未知区域的土壤重金属污染状况进行评估是很有必要的.本研究以重庆江津市吴滩镇为研究区,在该研究区采集耕层土壤样品121个并对重金属Pb、Cd、Cr、Hg、As的含量进行了分析,并通过ArcGIS和地统计得到各种重金属的空间变异情况,其变异性的大小为:Hg＞Cd＞As＞Pb＞Cr,均为中等变异.绘制出各重金属的空间分布图,且对各元素的污染程度进行评价,其污染程度Cd＞Cr＞Hg＞As＞Ph.土壤变异越大,合理采样数也越大.Hg的变异最大,在95%的置信水平,5%的允许误差下,Hg的采样数为83.且随着对置信水平和相对误差条件的降低,各种元素所要求的采样数都有大幅度的减少." @default.
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- W2732811434 date "2008-01-01" @default.
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- W2732811434 title "Evaluation to Soil Heavy Metals' Pollution and the Study of Reasonable Sampling Number Sampling Number" @default.
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