Combining downscaled-GRACE data with SWAT to improve the estimation of groundwater storage and depletion variations in the Irrigated Indus Basin (IIB)
Arfan Arshad, Ali Mirchi, Maryam Samimi, Bashir Ahmad
Abstract
in the downstream canal command areas. GWS declined by -325.55 mm/year at Dehli Doab, followed by -186.86 mm/year at BIST Doab, -119.20 mm/year at BARI Doab, and -100.82 mm/year at JECH Doab. The rate of groundwater depletion is increasing in the canal command areas of Delhi Doab and BIST Doab by 0.21-0.35 m/year. Larger groundwater depletion in some canal command areas (e.g., RACHNA, BIST Doab, and Delhi Doab) is associated with the rice-wheat cropping system, low rainfall, and low flows from tributaries.
Topics & Concepts
Environmental scienceGroundwaterHydrology (agriculture)IndusDrainage basinSoil and Water Assessment ToolStructural basinIrrigationWater storageSWAT modelSurface waterWater resource managementStreamflowGeologyEnvironmental engineeringGeographyInletBiologyPaleontologyEcologyGeomorphologyCartographyGeotechnical engineeringGeophysics and Gravity MeasurementsGeophysical and Geoelectrical MethodsHydrology and Watershed Management Studies