Spatial distribution of TDS in drinking water of Tehsil Jampur using Ordinary and Bayesian Kriging

Abstract

In this research article, level of TDS in groundwater with spatial domain Tehsil Jampur, Pakistan is studied. Its enhanced level in drinking water produces harmful effects on human health and aquatic ecology. This study revealed that, among thirty observed locations, TDS level in 56% of the water samples exceeds the maximum permissible limit (1000g/ml) of TDS as described by WHO. Four estimation techniques were comparatively studied for fitting well known matern spatial covariance models. Model based Ordinary Kriging (OK) and Bayesian Kriging (BK) were used for spatial interpolation at unmonitored locations. The best interpolation technique was selected on the basis of least root mean squared prediction error (RMSPE). Prediction maps were generated for visual presentation of interpolated sited for both techniques.