[ Aménagement hydro-agricole et dynamique spatio-temporel des unités d’occupation des terres dans le bassin versant de Tapoa, Burkina Faso ]
Volume 30, Issue 2, August 2020, Pages 571–585
Samuel Yonkeu1, Belem Mamounata2, and Malkouma Hassane Dabiemo3
1 Université Senghor d’Alexandrie, Egypt
2 Maître de Recherche, Ecologue, Ethnobotaniste, Muséum d’Histoire Naturelle, Herbier National, Institut National d’Environnement et de Recherches Agricoles, Centre National de Recherches Scientifiques et Technologiques, Ouagadougou, Burkina Faso
3 Doctorant en Environnement, Muséum d’Histoire Naturelle, Herbier National, Institut National d’Environnement et de Recherches Agricoles, Centre National de Recherches Scientifiques et Technologiques, Sciences et Technologies - Université Aube Nouvelle, 06 BP9283 Ouagadougou 06, Ouagadougou, Burkina
Original language: French
Copyright © 2020 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Hydro-agricultural fitting out seen as a main solution to the problems of rainfall deficits represent a source of degradation of the plant cover. The aim of this study was to understand the dynamics of land use units linked to hydro-agricultural fitting out in the Tapoa watershed. The methodology deployed consisted in the diachronic analysis of multi-date images of Landsat Thematic Mapper from 1975, 1998 ETM + and OLI-TIRS from 2018. Several scenes were used and a difference period of 43 years divided into two periods allowed us to compare the evolution of land use units within the limits of the Tapoa watershed. The results show an increase in crop areas compared to other natural units. The cultivated areas which occupied 5.4% of the watershed surface in 1975, reach 22.54%. For the savannahs’ area, it decreased from 83% to 61.98% in the period 1975-2018. These observed changes are largely linked to the development of human activities induced by the Tapoa hydro-agricultural fitting out. The regression of plant units to the benefit of anthropized spaces testifies the degradation of natural plant cover. This development, although having positive socio-economic benefits, is a degradation factor of the natural environment of the area. However, it cannot be the only factor in the deterioration and their dynamics.
Author Keywords: Dam, dynamics, environmental degradation, land use units, watershed, Tapoa, Burkina Faso.
Volume 30, Issue 2, August 2020, Pages 571–585
Samuel Yonkeu1, Belem Mamounata2, and Malkouma Hassane Dabiemo3
1 Université Senghor d’Alexandrie, Egypt
2 Maître de Recherche, Ecologue, Ethnobotaniste, Muséum d’Histoire Naturelle, Herbier National, Institut National d’Environnement et de Recherches Agricoles, Centre National de Recherches Scientifiques et Technologiques, Ouagadougou, Burkina Faso
3 Doctorant en Environnement, Muséum d’Histoire Naturelle, Herbier National, Institut National d’Environnement et de Recherches Agricoles, Centre National de Recherches Scientifiques et Technologiques, Sciences et Technologies - Université Aube Nouvelle, 06 BP9283 Ouagadougou 06, Ouagadougou, Burkina
Original language: French
Copyright © 2020 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Hydro-agricultural fitting out seen as a main solution to the problems of rainfall deficits represent a source of degradation of the plant cover. The aim of this study was to understand the dynamics of land use units linked to hydro-agricultural fitting out in the Tapoa watershed. The methodology deployed consisted in the diachronic analysis of multi-date images of Landsat Thematic Mapper from 1975, 1998 ETM + and OLI-TIRS from 2018. Several scenes were used and a difference period of 43 years divided into two periods allowed us to compare the evolution of land use units within the limits of the Tapoa watershed. The results show an increase in crop areas compared to other natural units. The cultivated areas which occupied 5.4% of the watershed surface in 1975, reach 22.54%. For the savannahs’ area, it decreased from 83% to 61.98% in the period 1975-2018. These observed changes are largely linked to the development of human activities induced by the Tapoa hydro-agricultural fitting out. The regression of plant units to the benefit of anthropized spaces testifies the degradation of natural plant cover. This development, although having positive socio-economic benefits, is a degradation factor of the natural environment of the area. However, it cannot be the only factor in the deterioration and their dynamics.
Author Keywords: Dam, dynamics, environmental degradation, land use units, watershed, Tapoa, Burkina Faso.
Abstract: (french)
Les aménagements hydro-agricoles vus comme une panacée aux problèmes de déficits pluviométriques représentent une source de dégradation du couvert végétal. Cette étude a eu pour objectif d’appréhender la dynamique des unités d’occupation des terres en liens avec l’aménagement hydro-agricole dans le bassin versant de la Tapoa. La méthodologie déployée a consisté à l’analyse diachronique d’images multi-dates de Landsat Thematic Mapper de 1975, 1998 ETM+ et OLI-TIRS de 2018. Plusieurs scènes ont été utilisées et une période d’écart de 43 ans répartie en deux périodes séquentielles a permis de comparer l’évolution des unités d’occupation des terres dans les limites du bassin versant de la Tapoa. Les résultats révèlent une progression des zones de cultures par rapport aux autres unités naturelles. Les superficies cultivées qui occupaient 5,4% en 1975, atteignent 22,54% de la superficie du bassin versant. Quant à la superficie des savanes, elle a connu une régression de 83% à 61,98% dans la période 1975-2018. Ces changements observés sont en grande partie liés au développement des activités humaines induits par l’aménagement hydro-agricole de la Tapoa. La régression des unités végétales au profit des espaces anthropisés témoigne de la dégradation du couvert végétale naturelle. Cet aménagement bien qu’ayant ses apports positifs sur le plan socio-économique, est un facteur de dégradation de l’environnement naturel de la zone. Cependant, il ne saurait être le seul facteur de la dégradation et leurs dynamiques.
Author Keywords: Barrage, dynamique, dégradation de l’environnement, unités d’occupations des sols, bassin versant, Tapoa, Burkina Faso.
How to Cite this Article
Samuel Yonkeu, Belem Mamounata, and Malkouma Hassane Dabiemo, “Hydro-agricultural fitting out and spatio-temporal dynamics of land use units in the Tapoa watershed, Burkina Faso,” International Journal of Innovation and Applied Studies, vol. 30, no. 2, pp. 571–585, August 2020.
