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Calculation model based on the Gaussian diffusion of heavy metal pollution sources

Xiao Ai-mei, Ju Tong-sheng, Zhang Xian-wei, Cao Yan-feng

The analysis on urban topsoil heavy metal pollution is the important foundation of urban management and urban planning. The topsoil in the city proper was uniformly sampled to measure the concentration data of 8 kinds of heavy metals at each sampling point. The evaluating method of the single factor index and the Nemerow comprehensive pollution index method were adopted to analyze the degree of heavy metal pollution in different areas in the city. Through analyzing the propagation characteristics of heavy metal contamination in the air, solids and the liquid, a mathematical model was constructed utilizing the Gauss equation to confirm the location of the polluter and eight kinds of heavy metal polluters were accurately calculated utilizing the sampled data. To be more realistic, considering the influence of factors like wind speed, gravity deposit, raindrop deposit and others on heavy metal contamination concentration’s distribution, optimized Gaussian Model after reasonable correction is built