Abstract
Excessive groundwater pumping in Rechna Doab has caused a depletion of aquiferbody. Efforts were made to identify the ground flow dynamics and recharge sources of Rechna Doab.Finite difference model technique was used to study the groundwater system under steady state. VisualMODFLOW 2000 was used to steady state simulation of study area. Simulation of groundwater flowover an area of about 35,217 km2 with a uniform grid size of 2500m by 2500m was done. Study areawas divided into the grid of 138 rows and 100 columns. The seepage losses from canals, horizontalflows, recharge from precipitation and irrigation return flows were put to develop conceptual model.Discharge of canals, evapotranspiration and precipitation data was collected from local governmentagencies. Boundary conditions, hydraulic parameters and data of 50 observation wells were applied formodel calibration. The zone budget study under steady state simulation showed that the total directrecharge to the aquifer was 645.48 MCM and total drought of the aquifer was 645.49 MCM. Based onresults it was concluded that model was more sensitive to hydraulic conductivity and rechargeparameters.
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