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In this paper,the comprehensive evaluation method including the analysis of the spatial distribution of heavy metals, the evaluation of geo-accumulation index and ecological rick index is applied to evaluate the pollution of the topsoil in the city. It analyzes the main pollutants qualitatively and evaluates the degree of pollution of heavy metals and ecological harm. In the case of existing data,...
Semivariograms and its parameters have a significant impact on Kriging interpolation and stochastic simulation. This paper used GS+ and ArcGIS to research the heavy metal of Yichang citrus orchard, which used spherical model, Gaussian model, exponential model and linear model to fit the experimental semivariograms and applied these models in the Sequential Gaussian Simulation. The stochastic simulation...
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