Effect of Recharge and Abstraction on Groundwater Levels

Groundwater constitutes 99% of all liquid freshwater globally that is available for human use. levels in the Nairobi aquifer system (NAS) have been declining over time because excessive abstraction fueled by increased water demand. This has cost pumping and drilling boreholes, which unsustainable. The objective this study to determine effect recharge on groundwater using a more realistic approach estimating SWAT model while considering climatic data, soil type, land use/cover, topography. Recharge obtained from was applied MODFLOW system. Results showed average annual 73 mm, about 9.7% precipitation. decreased with an increase decrease vice versa. will 76 m year 2063 if rate kept constant maintained, 14m 2030 trend continues constant. should be regulated according enhanced avoid possible depletion groundwater. Doi: 10.28991/CEJ-2022-08-05-05 Full Text: PDF