Articles | Volume 27, issue 11
https://doi.org/10.5194/hess-27-2189-2023
https://doi.org/10.5194/hess-27-2189-2023
Research article
 | 
14 Jun 2023
Research article |  | 14 Jun 2023

Hydrological regime of Sahelian small waterbodies from combined Sentinel-2 MSI and Sentinel-3 Synthetic Aperture Radar Altimeter data

Mathilde de Fleury, Laurent Kergoat, and Manuela Grippa

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Cited articles

Abdourhamane Touré, A., Tidjani, A., Guillon, R., Rajot, J. L., Petit, C., Garba, Z., and Sebag, D.: Teneur en matières en suspension des lacs sahéliens en liaison avec les variations piézométrique et pluviométrique: cas des lacs Bangou Kirey et Bangou Bi, Sud-Ouest Niger, Afrique Science, 12, 384–392, 2016. a
Andam-Akorful, S. A., Ferreira, V. G., Ndehedehe, C. E., and Quaye-Ballard, J. A.: An investigation into the freshwater variability in West Africa during 1979–2010, Int. J. Climatol., 37, 333–349, https://doi.org/10.1002/joc.5006, 2017. a
Arsen, A., Crétaux, J.-F., Berge-Nguyen, M., and Del Rio, R. A.: Remote Sensing-Derived Bathymetry of Lake Poopó, Remote Sens., 6, 407–420, https://doi.org/10.3390/rs6010407, 2013. a
Assanvo, W., Dakono, B., Théroux-Bénoni, L. A., and Maïga I.: Extrémisme violent, criminalité organisée et conflits locaux dans le Liptako-Gourma, Report, Institut d'Etudes de Sécurité, 28 pp., https://issafrica.s3.amazonaws.com/site/uploads/war-26-fr.pdf (last access: 22 September 2022), 2019. a
Avisse, N., Tilmant, A., Müller, M. F., and Zhang, H.: Monitoring small reservoirs’ storage with satellite remote sensing in inaccessible areas, Hydrol. Earth Syst. Sci., 21, 6445–6459, https://doi.org/10.5194/hess-21-6445-2017, 2017.  a
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Short summary
This study surveys small lakes and reservoirs, which are vital resources in the Sahel, through a multi-sensor satellite approach. Water height changes compared to evaporation losses in dry seasons highlight anthropogenic withdrawals and water supplies due to river and groundwater connections. Some reservoirs display weak withdrawals, suggesting low usage may be due to security issues. The satellite-derived water balance thus proved effective in estimating water resources in semi-arid areas.
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