Interpolation of Radon Concentrations Using GIS-Based Kriging and Cokriging Techniques

摘要

This article demonstrates the use of two GIS-based interpolation techniques, kriging and cokriging, to estimate the Rn concentrations for unknown zip codes in the State of Ohio. It was observed that cokriging produced better results when compared with kriging. It was also observed that even for a lesser number of known Rn concentrations than complete dataset, cokriging interpolation technique still produced better results. The spatial variation maps of Rnrnconcentrations plotted from kriging and cokriging interpolation techniques (Figures 3 and 4) have shown similar variation of uranium concentrations in Ohio as observed from the aerial radiometric contour map of uranium concentrations of Ohio (Figure 2), with higher concentrations in central and west Ohio.