城市表层土壤化学元素污染传播的核回归模型

Kernel Regression Model of the Spread of Chemical Elements Pollution in Urban Surface Soil

以某城市城区主要功能区表层土壤0～10,cm中As、Cd、Cr、Cu、Hg、Ni、Pb、Zn 8种化学元素在采样点处的含量和背景值为基础,利用插值方法,给出主要观测区域内8种主要化学元素的空间分布;并通过单因素方差分析及聚类分析探究污染原因,建立了城市表层土壤化学元素污染传播的核回归模型.利用该模型对化学元素的污染趋势进行模拟仿真,形象化展示了化学污染传播的动态过程.

Based on the soil values and the concentration of chemical elements of As, Cd, Cr, Cu, Hg, Hi, Pb and Zn in about 0 - 10 cm surface soil from some sample points of a certain city, spatial distribution of the 8 major chemical elements in the observed region were discovered with the interpolation method. Causes of contamination were analyzed with both single and cluster factor variance analyses, and a kernel regression model of the spread of chemical elements pollution in urban surface soil was established. By means of this model, chemical elements pollution trends were simulated and dynamic process of the spread of chemical elements pollution was demonstrated.