Taking a chemical relocation plot in Shandong Province as an example, the investigation of trichloromethane concentration in soil was carried out by the systematic zonal distribution method, and the interpolation simulation of trichloromethane concentration in soil was carried out by the radial base model, IDW model and Tyson polygon model interpolation method respectively through statistical analysis of the survey sampling and detection results, comparing the simulation prediction accuracy of each interpolation model and different parameters, and the spatial distribution of trichloromethane concentration obtained by different calculation methods. The spatial distribution characteristics of contaminated soil volume and trichloromethane concentration obtained by different calculation methods were compared, and on this basis, the optimal model was selected for the spatial distribution simulation study of trichloromethane. The results showed that: the concentration of trichloromethane in soil was correlated with the depth of soil layer, and the concentration decreased gradually with increasing depth, the highest value of detected concentration was 5.96 mg/kg, and the average concentrations of trichloromethane in soil layer from top to bottom at three depths were 5.96, 1.67 and 1.18 mg/kg, respectively; there was a certain spatial correlation of trichloromethane concentration in soil, and by comparing the IDW (inverse distance weight) model can better simulate the spatial distribution characteristics of trichloromethane.
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