Abstract:In order to visually display the three dimensional spatial distribution of pollutants and define the volume polluted contaminated soil, a THREE-DIMENSIONAL visualization model can be built to achieve this goal. Based on EVS software, this paper adopts three-dimensional formation modeling method and takes a slag dump Yuxi city as the research object to carry out three-dimensional spatial interpolation analysis of pollutants. The mercury pollution range and volume in Kriging, IDWS, IDWM and NN interpolation models were compared, and the model accuracy was evaluated by cross-validation method. The results show that the mean error (ME) and mean absolute error (MAE) of the four interpolation models are NN> IDWS> IDWN>Kriging, root mean square error (RMSE) is NN>IDWS>Kriging>IDWM and Kriging interpolation models have the highest interpolation accuracy. Mercury pollution was concentrated in the slag layer, and the Kriging interpolation model calculated that the contaminated volume of soil was 36787.968 m3. The results of this study have broad application prospects in soil remediation in the future.