Matlab在城市表层土壤重金属污染传播中的运用

Study in the diffusion of heavy metal pollution in urban topsoil with Matlab programs

针对城市表层土壤重金属污染问题,运用Matlab软件绘出重金属元素的空间分布图,并根据Muller地积累指数分级,分析了城区内不同区域重金属的污染程度以及污染的原因。考虑到重金属污染物的传播特征和土壤在不同类区的饱和度,结合费克扩散定律,建立了不同的分子传播扩散模型,并运用因子分析法,从而确定了污染源。

In order to deal with the problem of urban topsoil contaminated by heavy metal pollution, we establish a spreading model of heavy metal pollution. Specifically, the spatial distribution map of the heavy metal elements is plotted v/a software Matlab. Furthermore, according to the accumulation index Muller, we classify and analyze the pollution level as well as the causes leading to the heavy metal pollution in several areas. In the consideration of spreading characteristic of heavy metal pollutants and the pollutants saturation in the soil of different areas, by using Fick law, we establish corresponding spread diffusion model of the pollutant molecules. And by using Factor Analysis, we determine the source of contamination.