Geostatistical Analyses Of Historical Hydro-Geological Parameters In Dera Ismail Khan Subbasin, NWFP, Pakistan

Abstract

Dera Ismail Khan is one of cities of the N.W.F.P. The growing population in this area manifests the increased water demands because utilization has increased manifolds in recent years. In this area, major source of water is groundwater. For the understanding of the groundwater, the historical behavior of the groundwater is crucial to determine the fore coming changes in response to the variation in the climate and other factors. The research conducted over here describes the historical spatial behavior of the groundwater. The technique used for its study is Covariance Analyses. Electrical conductivity (Ec), Total Dissolved Solids (TDS), pH of water, Sulfate, Calcium, Magnesium, Alkalies and Chloride are analyzed against latitude, longitude and depth of some test holes. The variation in the analyses has been determined by four relationships. So it has been found that TDS, Ec, Mg, Na+K v/s depth and pH, SO4 v/s latitude show strong negative relationship. And TDS, Ec, Ca, Mg, Na+K v/s latitude, pH v/s longitude and chloride v/s depth show moderate negative relationship. While TDS, EC, SO4, Ca, Mg, Na + K and chloride show moderate positive relationships. The Empirical relationships between the parameters were also found.