Publications related to the GRACE Missions (no abstracts)

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A multi-source approach to groundwater storage and recharge assessment in the Volta Basin

Barbosa, Sergio A., Jones, Norman L., Williams, Gustavious P., Teklu, Henok, Yidana, Sandow M., Pulla, Sarva T., Sanchez, Jorge Luis, Nelson, E. James, Ames, Daniel P., and Miller, A. Woodruff, 2025. A multi-source approach to groundwater storage and recharge assessment in the Volta Basin. Science of the Total Environment, 1001:180421, doi:10.1016/j.scitotenv.2025.180421.

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@ARTICLE{2025ScTEn100180421B,
       author = {{Barbosa}, Sergio A. and {Jones}, Norman L. and {Williams}, Gustavious P. and {Teklu}, Henok and {Yidana}, Sandow M. and {Pulla}, Sarva T. and {Sanchez}, Jorge Luis and {Nelson}, E. James and {Ames}, Daniel P. and {Miller}, A. Woodruff},
        title = "{A multi-source approach to groundwater storage and recharge assessment in the Volta Basin}",
      journal = {Science of the Total Environment},
     keywords = {Earth observations, GRACE, Groundwater, Recharge estimation, Surface water{\textendash}groundwater interaction, Volta Basin},
         year = 2025,
        month = oct,
       volume = {1001},
          eid = {180421},
        pages = {180421},
     abstract = "{Assessing groundwater storage changes is important in semiarid regions
        such as the Volta Basin in sub-Saharan Africa but can be
        challenging due to data scarcity. This study presents a multi-
        source approach combining NASA's Gravity Recovery and Climate
        Experiment (GRACE) mission data, Climate Hazards group Infrared
        Precipitation with Stations (CHIRPS) precipitation data, the new
        Global Land Data Assimilation System (GLDAS) v2.2 CLSM
        groundwater storage anomaly dataset, traditional non-groundwater
        terrestrial water storage components from GLDAS v2.1, and
        Copernicus satellite data for surface water dynamics to analyze
        groundwater storage changes and recharge rates in the Volta
        Basin. Our study reveals: (1) A small change in groundwater
        storage from 2002 to 2012, followed by a significant increase
        from 2012 to 2022; (2) A total groundwater increase of
        approximately 30 cubic kilometers or about 10 cm of liquid water
        equivalent over the entire study period; (3) Water storage in
        the basin is dominated by fluctuations in Lake Volta, which
        accounts for {\ensuremath{\sim}}50 \% of terrestrial water
        storage; (4) Groundwater recharge rates estimated using the
        Water Table Fluctuation Method on GRACE- and GLDAS-derived data,
        aligned with values from monitoring wells and previous studies;
        (5) The GLDAS v2.2 dataset exhibits similar seasonal trends with
        periodic peaks and troughs, yet the amplitude of anomalies from
        GLDAS are larger compared to the GRACE dataset; and (6)
        Groundwater recharge shows a weak correlation with extreme
        precipitation events, suggesting more water percolates rather
        than evaporates during such events. However, other factors,
        including land use changes and agricultural practices, may also
        impact groundwater storage and recharge.}",
          doi = {10.1016/j.scitotenv.2025.180421},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2025ScTEn100180421B},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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