Hydro Geochemical Characterization of Groundwater in Alluvial Plains of Lyari and Malir Rivers in  Gulshan-e-Iqbal, Karachi

Rakhshanda Sadaf; Khadim Hussain Rajper; Adeel Ahmed; Muhammad Sooomar Samtio; Nisar Ahmed Khuhro

Rakhshanda Sadaf Department of Geology, Federal Urdu University of Arts, Science and Technology, Karachi, Pakistan
Khadim Hussain Rajper Geosciences Advance Research Laboratory, Chak Shahzad Islamabad, Geological Survey of Pakistan
Adeel Ahmed GIS, Manager, Hafil (Mohammad Yousaf Naghi and Brothers), Saudi Arabia
Muhammad Sooomar Samtio Center of Pure and Applied Geology, University of Sindh, Jamshoro, Sindh, Pakistan
Nisar Ahmed Khuhro National Institute of Health, Islamabad, Pakistan

Keywords: alluvial plane, physico-chemical indicators, coastal area, sea intrusion, geo spatial

Abstract

Gulshan-e-Iqbal and its surrounding area is studied to reveal the influence of geological factors, anthropogenic activities and weathering of aquifer rock material. Inter ionic relationship of groundwater with rocks of Nari and Gaj formation proves its unsuitability for drinking purpose. Mainly groundwater samples values are higher than the allowable limit of WHO guide line values. The graphical inter ionic association involving Ca²⁺ + Mg²⁺ and SO ^2- + HCO- evidence the presence of carbonate and silicate weathering in the region. Municipal supplied water samples parameters are in permissible limits but biologically contaminated. Water samples from treated water plant contain nutrients with in limit with no biological contamination. Inter ionic ratio of Ca/Mg and Na/Cl reflect sea water intrusion and is responsible for groundwater pollution due to intimacy of study area to Arabian sea. Groundwater of the study area contains substantial level of salinity and thereafter requires purification before using it.

Hydro Geochemical Characterization of Groundwater in Alluvial Plains of Lyari and Malir Rivers in Gulshan-e-Iqbal, Karachi

Groundwater of Lyari and Malir Rivers

Abstract