Evaluating Groundwater Storage Change and Recharge Using GRACE Data: A Case Study of Aquifers in Niger, West Africa

Accurately assessing groundwater storage changes in Niger is critical for long-term water resource management but difficult due to sparse field data. We present a study of and recharge Southern Niger, computed using data from NASA Gravity Recovery Climate Experiment (GRACE) mission. compute anomaly estimate by subtracting the surface provided Global Land Data Assimilation System (GLDAS) model GRACE total anomaly. use statistical fill gaps analyze time period 2002 2021, which corresponds life span mission, show that there little change 2002–2010, steep rise 2010–2021, can partially be explained increased precipitation. Water Table Fluctuation method rates over this compare these values with previous estimates. range analyzed, resources are not being overutilized could further developed beneficial use. Our estimated favorably estimates provide managers required understand how much additional extracted sustainable manner.