Modelling arsenic hazard in Cambodia: A geostatistical approach using ancillary data. Luis Rodríguez Lado, David Polya, Lenny Winkel, Michael Berg and Aimee Hegan. Applied Geochemistry, Volume 23, Issue 11, November 2008, Pages 3010-3018. The As concentration in shallow groundwater in Cambodia was estimated using 1329 georeferenced water samples collected during the period 1999–2004 from wells between 16–100 m depth. Arsenic concentrations were estimated using block regression-kriging on the log transformed As measurements. Auxiliary raster maps (DEM-parameters, remote sensing images and geology) were converted to 16 principal components that were used to explain the distribution of As over the study area. The regression-kriging model was validated using an external set of 276 samples, and the results were compared to those obtained by ordinary block kriging. DOI: 10.1016/j.apgeochem.2008.06.028 Access the paper or contact the Author
