呼兰县土壤重金属元素镉·铬的空间变异性研究

Investigation of Spatial Variability of Heavy Metals Cd and Cr in Soil in Hulan County

基于ArcGIS技术,应用地统计学方法和半方差理论对呼兰区土壤中的重金属镉和铬进行空间变异性研究和Kriging插值。结果表明:研究区中铬具有较强的空间变异性,在土壤中受其他因素的影响逐渐增强;镉具有中等空间变异性。镉和铬的污染情况变化不是很大,基本上都呈连片分布,主要集中在中部地区,并由中部地区向周边逐渐减弱。

Based on ArcGIS technology, using geostatistical method and the semi-variance theory, spatial variability research and Kriging were conducted on heavy metals Cd and Cr in soil in Hulan. The results indicated that Cr had a strong spatial variability in the study area, influenced gradually increased by other factors in the soil, and Cd had a moderate spatial variability. The pollution of Cd and Cr was not great, they were layered continuous distribution in basically, mainly concentrated in the central region, and waned from the central region to the periphery.