Study and evaluation of the effects of vegetation cover destruction on soil degradation in Middle Guinea through the application of remote sensing and and geotechnics.

Autor:	Diallo ID; Research team in Applied and Marine Geosciences, Geotechnics and Geohazards Laboratory (LR3G), Department of Geology, Faculty of Sciences Tétouan, Abdelmalek Essaadi University, Mhannech 2, BP 121, 93030, Tétouan, Morocco., Tilioua A; Research Team in Thermal and Applied Thermodynamics (2.T.A.), Mechanics, Energy Efficiency and Renewable Energies Laboratory (L.M.3.E.R.). Department of Physics, Faculty of Sciences and Techniques Errachidia, Moulay Ismail University of Meknès, B.P. 509, Boutalamine, Errachidia, Morocco., Darraz C; Research team in Applied and Marine Geosciences, Geotechnics and Geohazards Laboratory (LR3G), Department of Geology, Faculty of Sciences Tétouan, Abdelmalek Essaadi University, Mhannech 2, BP 121, 93030, Tétouan, Morocco., Alali A; Applied Geology Research Laboratory, Applied Geology and Remote Sensing Research Team, Department of Geosciences, Faculty of Sciences and Techniques Errachidia, Moulay Ismail University of Meknès, B.P. 509, Boutalamine, Errachidia, Morocco., Sidibe D; Minister of Higher Education, Scientific Research and Innovation, Former Higher Geology and Mines Institute, Ministry of State in charge of Higher Education and Scientific Research, Boké, Guinea.
Jazyk:	angličtina
Zdroj:	Heliyon [Heliyon] 2023 Dec 12; Vol. 10 (1), pp. e23556. Date of Electronic Publication: 2023 Dec 12 (Print Publication: 2024).
DOI:	10.1016/j.heliyon.2023.e23556
Abstrakt:	Soil degradation in Middle Guinea is increasing over the years. While it's good to have precautions to deal with it, it's even more important to go back to the source of the scourge in order to lessen its effects over time, or even eradicate it. At the center of the factors that are often mentioned is the destruction of the vegetation cover, and the aim of this study is to clear it (in all its forms: trees, grass, savannah, etc.) by following its variation in time [1982 and 2021] and in space. The present study was conducted by combining the remote sensing and GIS results, developed with data from geotechnical survey data and laboratory tests. On the Mali Labé Linsan axis, between [1982 and 1992], 63 % of the territory explored was occupied by fresh vegetation cover, compared to 13 % of dry vegetation, as well as 12 % of sterile soil and 12 % of sand mineral soil. For the periods [1992-2002] and [2002-2012], these same parameters increased to: 67 %; 11 %; 11 % and 11 %. The period [2012-2021] was marked by changes of 73 %; 10 %; 9 % and 9 %, respectively. The bearing capacity of soils varies from one point to another. In all six boreholes presented, their maximum values are greater than or equal to 400 Kpa (≥400 Kpa). The minimum values calculated for 2.1 ≤ B(m)≤7.3 fluctuate between 291 Kpa and 806 Kpa. The investigations carried out on this subject show that the overall movement of the positive variation of the vegetation cover in time (63 % < 67 % < 73 %) and very contrasted in space, would not be responsible for the degradations (which are local and mainly caused by erosion: wind and water). In addition, they open up to a (geoscientific and geotechnical) approach of a deep analysis, the purpose of which suggests the adoption of slab/concrete/grating foundations (depth of anchorage specific to each soil analyzed). Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (© 2023 Published by Elsevier Ltd.)
Databáze:	MEDLINE
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