Aquifer Depletion in the Arlit Mining Area (Tim Mersoï Basin, North Niger)

Located in northwestern Niger, the Tim Mersoï Basin (TMB) is an important mining region scale of West Africa. Groundwater considered main source fresh water basin, especially for activities. It, therefore, appears essential to monitor their responses these However, no study has been carried out Basin. This aims evaluate groundwater storage changes (GWSC) TMB and analyze spatio-temporal evolution Tarat aquifer under effect activities Arlit region. For this purpose, Gravity Recovery And Climate Experiment (GRACE), Global Land Data Assimilation System (GLDAS), in-situ data were used. The results show a variation GWS from 2002 2019 about −0.1310 cm/year on basin −0.0109 area. GWSC at one shown be linked with RMSE between two datasets 0.79. shows potential GRACE contextualizing studies small areas. also highlighted that flow direction was highly modified; drawdown table more than 50 m areas heavily impacted by activities, increasing intensity northwest southeast Arlit.