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

de Fleury, Mathilde; Kergoat, Laurent; Grippa, Manuela

doi:https://doi.org/10.5194/hess-27-2189-2023

Articles | Volume 27, issue 11

https://doi.org/10.5194/hess-27-2189-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/hess-27-2189-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 27, issue 11

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

Supplement

https://doi.org/10.5194/hess-27-2189-2023-supplement

Data sets

Sentinel-2 MSI: MultiSpectral Instrument, Level-1C European Union, ESA, and Copernicus https://developers.google.com/earth-engine/datasets/catalog/COPERNICUS_S2

Global lake evaporation volume (GLEV) dataset G. Zhao https://doi.org/10.5281/zenodo.4646621

ERA5 hourly data on single levels from 1959 to present H. Hersbach, B. Bell, P. Berrisford, G. Biavati, A. Horányi, J. Muñoz Sabater, J. Nicolas, C. Peubey, R. Radu, I. Rozum, D. Schepers, A. Simmons, C. Soci, D. Dee, and J.-N. Thépaut https://doi.org/10.24381/cds.adbb2d47

Global Precipitation Measurement, GPM IMERG Final Precipitation L3 Half Hourly 0.1 degreex0.1 degree V06 G. J. Huffman, E. F. Stocker, D. T. Bolvin, E. J. Nelkin, and J. Tan https://doi.org/10.5067/GPM/IMERG/3B-HH/06

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.