Journal of
Soil Science and Environmental Management

  • Abbreviation: J. Soil Sci. Environ. Manage.
  • Language: English
  • ISSN: 2141-2391
  • DOI: 10.5897/JSSEM
  • Start Year: 2010
  • Published Articles: 314

Full Length Research Paper

Response of rainfall variability on the evolution of the vegetative cycle in the Chari-Logone basin (Lake Chad basin)

Mahamat Nour A.
  • Mahamat Nour A.
  • Laboratoire Hydro-Ge?osciences and Re?servoirs, University of N’Djamena, N’Djamena, Chad.
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Vallet-Coulomb
  • Vallet-Coulomb
  • Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France.
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Sylvestre F.
  • Sylvestre F.
  • Laboratoire Hydro-Ge?osciences and Re?servoirs, University of N’Djamena, N’Djamena, Chad.
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Deschamps P.
  • Deschamps P.
  • Aix Marseille Univ, CNRS, IRD, INRAE, Coll France, CEREGE, Aix-en-Provence, France.
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  •  Received: 03 September 2023
  •  Accepted: 21 November 2023
  •  Published: 30 November 2023

Abstract

The Chari-Logone Basin (CLB), encompassing 610,000 km2 as the hydrologically active segment of the Lake Chad basin, is the focal point of this study aiming to characterize the evolution of vegetation cover in response to rainfall. The primary focus relies on spatialized precipitation and NDVI data. Analysis of these spatial rainfall data reveals trends that predominantly align with a south-north gradient typical of the Sudano-Sahelian region, with the highest values observed in the southwestern part of the basin, coinciding with the direction of the monsoon flow into the area. The NDVI results depict spatial and seasonal changes, mirroring the seasonal variation in climate, particularly rainfall. In the Chari-Logone basin, the vegetation undergoes a gradual transition from Sudanian to Sahelian vegetation, with grasses predominantly forming at the end of the dry season and regenerating only after the onset of the first rains.

Key words: Chari-Logone, Lake Chad, rainfall, vegetation, spatio-temporel, NDVI.

Copyright © 2024 Author(s) retain the copyright of this article.

This article is published under the terms of the Creative Commons Attribution License 4.0

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