【摘要】 道路交通是土壤重金属铅的重要来源之一,准确分析其与土壤铅含量的关系有利于进行科学的土壤铅污染风险评估和管理。以武汉市主城区为研究区,实地采样得到300份土壤铅含量,基于地统计分析其与道路网的关联性,研究发现武汉市主城区铅含量存在空间集聚性,Moran’s I指数为0.23。不同类型道路周边土壤铅含量存在较大差异,铁路附近铅含量最高,主干道次之,然后是次干道,高速公路附近铅含量最低。铅含量与道路网密度表现出较高的相关性,相关系数R~2为0.51;Moran’s I指数为0.27,表明武汉市道路网与铅含量存在空间自相关性。更多还原

【Abstract】 Road traffic is one of the significant sources of heavy metal Pb in soil. Accurate analysis of the relationship between road traffic and soil Pb concentration is beneficial to the scientific assessment and management of soil Pb pollution risk. Taking the urban area of Wuhan City as the study area, this study investigated the spatial distribution of soil Pb and its relationship with road network based on 300 samples of soil Pb concentration obtained by field sampling. Results showed that the soil Pb concentration showed spatial autocorrelation with Moran’s I being 0.23. The soil Pb concentration besides different types of roads is quite different, with the highest concentration beside the railroad, followed by main road, secondary road and expressway. The soil Pb concentration and road network density showed a high correlation with the correlation coefficient R~2 being 0.51; Moran’s I index was 0.27, indicating spatial autocorrelation between road network and lead concentration.更多还原