Groundwater Quality Evaluation in Thal Doab of Indus Basin of Pakistan
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2014, Vol 4, Issue 1
Abstract
Indus Basin is typical model of conjunctive use of surface and groundwater. A well transmissive continuous and deep alluvium Indus PlainAquifer (IPA)is underlain by world’s largest contiguous Indus Basin Irrigation System (IBIS). Currently the overall Indus aquifer is supplementing more than 40 percent in total water resources of Pakistan. Pressure on groundwater is increasing and groundwater withdrawal has crossed the limit of safe yield in many parts of IPA.Groundwater mining is creating detrimental environmental issues like lowering of water table,saline water upconing and intrusion. Management of groundwater through regulation is difficult to implement in the absence of required updated hydrogeologicalinformation about the aquifer.A program ofevaluation of national aquifers is under implementation by Pakistan Council of Research in Water Resource (PCRWR). Investigations program was initiated in Thal Doab of Indus Basinwhere 56 exploratory wells were drilled at a regular grid of 25 Km x25 Km.Water as well as soil samples were collectedandanalyzed for seven important parameters of water quality. The mapping of water qualityindicated large vertical and spatial variations in water qualityofthe study area. Hydrogeological facieswere worked out by developing Piper andDurovDiagrams. The evolution of groundwater quality was worked out in the context of geological framework of the area. The study yielded that most of the groundwater in Thal Doab is fresh because of extensive seepage and recharge of aquifer from rivers, precipitation and irrigation network.
Authors and Affiliations
D. Khan
Keywords
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