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La presente etude visait a faire une analyse de la dynamique des parcours dans l’Ouest du Burkina Faso dans un contexte de variabilite climatique et de gestion des ressources agropastorales. Les outils de teledetection ont ete utilises pour determiner l’evolution de l’occupation des terres et de la vegetation a travers l’indice de condition de la vegetation (VCI). L’indice de precipitation standardisee sur 06 mois (SPI-6) a permis de mesurer la variabilite pluviometrique. Une enquete terrain a enfin ete menee aupres de 80 pasteurs pour apprehender la mobilite du betail dans la zone d’etude. Les resultats ont montre la survenue de 05 poches de secheresse sur une periode de 36 ans (1981-2017), une baisse de la productivite des terres et une degradation de la biomasse vegetale. Entre 1995 et 2015, l’occupation des terres a ete en defaveur des zones de pâture (diminution de 13,08%). Ainsi, la mobilite du betail a connu des difficultes dont la plus importante est d’ordre social (95% des cas). En somme, l’activite pastorale a ete affectee ces dernieres annees d’une part par la variabilite pluviometrique et d’autre part par l’avancee du front agricole au detriment des espaces de pâture dans l’Ouest du Burkina Faso. © 2019 International Formulae Group. All rights reserved. Mots cles: Pastoralisme, terres de parcours, teledetection, MODIS, amenagement du territoire English Title: Study of climatic variability on the dynamics of occupation and land use for agro-pastoral purposes in the southern Sudanese zone of Burkina Faso English Abstract The aim of this study was to analyze the dynamics of rangeland in the southern Sudanese zone of Burkina Faso in the context of climatic variability and agropastoral resource management. Remote sensing tools have been used to determine changes in land use and vegetation through the Vegetation Condition Index (VCI). The 06-month standardized precipitation index (SPI-6) was used to measure rainfall variability. A field survey of 80 pastoralists was also conducted to assess livestock mobility in the study area. The results showed the occurrence of 05 pockets of drought over a 36-year period (1981-2017), a decrease in land productivity and a degradation of plant biomass. Between 1995 and 2015, land occupation was at a disadvantage in grazing  areas (13.08% decrease). Thus, livestock mobility has experienced difficulties, the most important of which is social (95% of cases). In short, pastoral activity has been affected in recent years both by rainfall variability and by the advance of the agricultural front to the detriment of grazing areas in western Burkina Faso. © 2019 International Formulae Group. All rights reserved. Keywords: Pastoralism, rangeland areas, remote sensing, MODIS, spatial planning

international journal of biological and chemical sciences

Etude de la variabilité climatique sur la dynamique d’occupation et d’utilisation des terres à des fins agro-pastorales dans la zone sud-soudanienne du Burkina Faso