Abstract
A team from the Geological Survey of Pakistan conducted a groundwater exploration survey in the Akhtar Zai Shah area of Qila Saifullah district. Electrical Resistivity method, employing Vertical Electrical Sounding (VES) with Schlumberger Electrode Configuration. Data along five (5) profile lines has been conducted targeting depth ranging from 300 to 400 meters. The depth range achieved in the observation points are predominantly in recent quaternary deposits, comprising mainly clay, silt, gravel, underlying by Jurassic Loralai Formation. Out of 5 points, the VES-2 point was recommended for groundwater potential at 350 feet with recommendation of simple tripod percussion drilling. Subsequently, a good quantity of high-quality drinking water was discovered within the Phyllite layer of the Loralai Formation. Nonetheless, there has been no systematic exploration of groundwater in the region. The drilling conducted at VES-1 exemplifies blind drilling in the quest for water sources. The success achieved at VES-2 further confirms the presence of groundwater in the Loralai Formation following confirmation of water bearing Shirinab Formation with secondary porosity in Quetta Valley.
Keywords:
Qila Saifullah, VES, Loralai Formation, Electrical Resistivity, Balochistan, Pakistan.
