摘要
采用地理信息系统(GIS)和地统计学相结合的方法,研究了黑龙江省双城市的土壤全量铜、锌、铅、镍、镉5种重金属元素的空间分异规律及其影响因子。结果表明:研究区土壤锌、镍、镉具有强烈的空间相关性,表明这3种元素受土壤内在属性影响较大;而铜、铅具有中等强度的空间相关性,表明这2种元素由土壤内在属性和人为因素共同起作用。镉、铅、铜较锌、镍的变程小,说明前3种重金属元素含量可能主要受到较小尺度因子的影响。研究区土壤各重金属元素空间分异规律如下:铜和镍呈东高西低的趋势,铅呈南高北低的趋势,而锌和镉分别表现为块状分布和岛状分布的特点。影响重金属元素空间分布的影响因子主要有自然因素(土壤类型、高程、土壤理化性质等)和人为因素(乡镇、道路、各种工厂等)。
Geographic information system （GIS） combined with geostatistics was applied to reveal the spatial variability of heavy metals and its affecting factors including Cu, Zn, Pb, Ni and Cd in Shuangcheng of Heilongjiang province. The results showed that Zn, Ni and Cd had a strong spatial correlation, which were affected by intrinsic characteristics of soils, whereas the spatial correlation of Cu and Pb were moderate, indicating that they were affected by intrinsic properties of soil and random factors together. The ranges of Cd, Pb were smaller than that of Cu, Zn and Ni, indicating that the 3 former heavy metals were affected by smaller range factors. The spatial variability characters of heavy metals in studied area soils were as follows. The contents of Cu and Ni decreased from east to west, and contents of Pb decreased from south to north, whereas the distribution of Zn was block-like and Cd was insular. Intrinsic and random factors were the main factors of driving forces of the heavy metals＇distributions. Intrinsic factors included soil types, the characteristics of soils, elevation and so on. Random factors included towns, roads, factories and so on.
出处
《水土保持学报》
CSCD
北大核心
2007年第1期59-64,共6页
Journal of Soil and Water Conservation
基金
黑龙江省自然科学基金重点项目(ZJN03-02)
关键词
土壤重金属
空间分异
影响因子
GIS
地统计学
heavy metals in soils
spatial variability
affecting factors
GIS geostatistics
