Spatial Distribution Characteristics of Heavy Metals in Surface Soil of Xilinguole Coal Mining Area Based on Semivariogram

Heavy metal pollution is a major environmental problem facing humankind. Locating the source and distribution of heavy pollutants around mines can provide scientific basis for control. The structure effect random semivariogram be used to determine reason spatial differences in content surface soil, coefficient variation regression analysis confirm that verification accuracy meets geostatistical requirements. According maximum difference method, metals soil mining area higher than surroundings, Cu Zn levels are background values Inner Mongolia. In present case, Zn, Mn, Pb, Cr, Ni, exceeded surroundings study by 65.10%, 53.72%, 52.17%, 46.24%, 33.08%, 29.49%, respectively. results show human activities play decisive role metals, leading their form “core periphery”. This pattern was significantly affected slope, NDVI value, distance from area, but Pb related high-grade roads. research methods conclusions have reference significance sources characteristics similar areas target prevention control area.