Groundwater Recharge Estimation at Barind Area, Bangladesh for Sustainable Groundwater Management: Application of Multiple Methods

For proper management of groundwater resources, estimation recharge is crucial. Information on particularly important in dry areas where continuously depleting. In this study, was estimated at two locations the dry, Barind area Bangladesh using applied tracer, water balance (WB) and water-table fluctuation (WTF) methods. WTF method, considerations for drinking irrigation withdrawal were taken. runoff WB a modified form USDA-SCS method used. The results revealed that average yearly Nachol location varied from 104.9–195.8 mm/year under different methods, having mean 136.1 mm/yr over At Niamatpur location, rate 125.1 to 210 mm (9.9 – 15.1% rainfall) 157.6 mm/yr. On average, produced lowest estimate followed by method. Based local geological hydrological settings suitability/limitations methods themselves, tracer technique may be regarded as reliable study area. information will help ‘water resource agency’ ‘policymakers’ adjust pumping/irrigation schemes, avoid over-exploitation resource, ensure long-term sustainability