Abstract:

Taking six kinds of elements of soil contamination including As, Cd, Cu, Pb, Tl

and Zn in Tongling area as an example, we have made spatial interpolation for soil elements

by using four types of representative interpolation methods, including inverse distance

weighted, radial basis function, ordinary Kriging and multifractal interpolation, and have

validated and appraised the resultsComparison is made between methods with optimized

parameters337 soil samples in a total of 372 samples were used for interpolation, and the

rest 35 samples not having been interpolated were used for validationThe results of

comparison indicate that ordinary Kriging exhibits best effect in characterizing spatial

distribution trend of soil elements, yet the optimized models and parameters of semi

variogram are still pending further study; multifractal method is the best in characterizing

local abnormality and contamination, whereas its function of reflecting the general texture

of soil element distribution needs indepth study; inverse distance weighted and radial

basis function interpolate less accurately for the spatial distribution of soil elements,

but are easy to use and to select optimized parameters.

Key words:

Key words: spatial interpolation; cross validation; heavy metals; soil; Tongling area