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

The "Integrated and Secure Livestock Production and Pastoralism in West Africa" (PEPISAO) project is implemented by the Economic Community of West African States (ECOWAS), as Project Manager, and CILSS, as Delegated Project Manager, with the financial support of the Agence française de Développement (French Development Agency) (AFD) and the technical assistance of the IRAM/ISSALA/ LARES consortium. With a duration of four years (2018-2022) and an amount of five (5) million Euros, the project covers the ECOWAS zone plus Chad and Mauritania. It has been extended at no additional cost to 31 December 2023. The project has been implemented since 2019 in a regional context marked by: (i) the deterioration of the pastoral, food and nutritional situation, (ii) the resurgence of insecurity of goods and people; (iii) the prevalence of the COVID 19 pandemic, on the one hand, and by (v) a significant increase in the number of regional projects dealing with pastoralism and (vi) a relative deterioration in the governance of cross-border transhumance, on the other hand. However, the stakeholders were able to overcome the effects of these factors through their commitment, and the project has achieved a lot. This report capitalises on the major achievements and results of four years of implementation.