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-  2011 

宜宾市城市土壤锌含量的空间分布特征及污染评价

DOI: 10.11821/yj2011010012

Keywords: 城市土壤,,地统计分析,克里格插值,宜宾市

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Abstract:

摘要: 在对四川省宜宾市63个土壤样品Zn含量分析的基础上,运用GIS地统计模块对Zn的空间分布特征和污染状况进行了系统分析。结果表明:不同功能区土壤Zn含量从高到低依次为:工业区>交通区>商业区>居民区>风景区;工业区、交通区和商业区土壤Zn含量显著高于四川省土壤背景值(82.1 mg/kg)(p=0.000),居民区和风景区土壤Zn含量与背景值无显著性差异(p>0.05);与四川省土壤基线值(156.4 mg/kg)相比,工业区、交通区和商业区土壤Zn超标率分别为71.42%、41.67%和33.33%,其他功能区未超标。地统计分析表明,土壤Zn具有中等程度的空间相关性,Zn的空间分布受随机性因素和结构性因素的共同影响。克里格插值分析表明上江北、下江北区域土壤Zn污染严重,翠屏区和南岸区也表现出一定污染,尤以工业区、交通区和商业区Zn污染最突出

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