Articles | Volume 10, issue 4
Research article
02 Aug 2022
Research article |  | 02 Aug 2022

Unraveling the hydrology and sediment balance of an ungauged lake in the Sudano-Sahelian region of West Africa using remote sensing

Silvan Ragettli, Tabea Donauer, Peter Molnar, Ron Delnoije, and Tobias Siegfried

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Cited articles

Albergel, J.: Sécheresse, désertification et resources en eau de surface – application aux petits bassins du Burkina Faso, IAHS-AISH publication, 168, 355–365, (last access: 23 July 2022), 1987. a
Alduchov, O. A. and Eskridge, R. E.: Improved Magnus form approximation of saturation vapor pressure, J. Appl. Meteorol., 35, 601–609,<0601:IMFAOS>2.0.CO;2, 1996. a
Amogu, O.: La dégradation des espaces sahéliens et ses conséquences sur l'alluvionnement du fleuve Niger moyen, Ph.D. thesis, Université Joseph Fourier Grenoble 1, 425 p.,, (last access: 23 July 2022), 2009. a
Amogu, O., Descroix, L., Yéro, K. S., Breton, E. L., Mamadou, I., Ali, A., Vischel, T., Bader, J. C., Moussa, I. B., Gautier, E., Boubkraoui, S., and Belleudy, P.: Increasing river flows in the Sahel?, Water (Switzerland), 2, 170–199,, 2010. a
Armon, M., Dente, E., Shmilovitz, Y., Mushkin, A., Cohen, T. J., Morin, E., and Enzel, Y.: Determining Bathymetry of Shallow and Ephemeral Desert Lakes Using Satellite Imagery and Altimetry, Geophys. Res. Lett., 47, 1–9,, 2020. a, b
Short summary
This paper presents a novel methodology to identify and quantitatively analyze deposition and erosion patterns in ephemeral ponds or in perennial lakes with strong water level fluctuations. We apply this method to unravel the water and sediment balance of Lac Wégnia, a designated Ramsar site in Mali. The study can be a showcase for monitoring Sahelian lakes using remote sensing data, as it sheds light on the actual drivers of change in Sahelian lakes.