[ Dynamique de l’occupation des terres dans le système agricole de la commune de Kéllé au Niger ]
Ibrahim Souley Malam Zanaidou1, Lawandi KANEMBOU2, Hammadou Younoussa Bachirou3, Waziri Mato Maman4, and Garba Zibo5
1 Laboratoire d’étude et de recherche sur les territoires sahélo-sahariens (LETRESS), Université Abdou Moumouni de Niamey, Niger
2 Département sol et Environnement, Université de Diffa, BP 78, Diffa, Niger
3 Département de sciences fondamentales, Université de Dosso, Niger
4 Département de Géographie, Université Abdou Moumouni de Niamey, Niger
5 Faculté des Sciences et Techniques, Département de Numérisation des Sciences de l’Environnement, Université de Dosso, BP 230 Dosso, Niger
Original language: French
Copyright © 2026 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.
In Niger, the combined effects of climate variability and climate change, together with anthropogenic pressure over recent decades, have strongly influenced land-use dynamics, particularly within agricultural systems. In the municipality of Kéllé, located in the Gouré Department (Zinder Region), spatio-temporal landscape analysis reveals, as in many other municipalities in Niger, significant changes in landscape evolution. In the present study, the analysis of satellite imagery and the use of a Geographic Information System (GIS) made it possible to trace ongoing changes between 1995 and 2025, in order to identify general trends and support decision-making in community-based natural resource management. The main objective of this study is to detect land-use dynamics in the municipality in response to climate change and human activities. The methodology is based on the interpretation of Landsat satellite imagery from 1995, 2015, and 2025. The results obtained from land-use maps, change-detection maps between observation dates, and a predictive map up to 2035 indicate that land use in the municipality is undergoing continuous transformation. Thus, areas occupied by tree-shrub steppe and dense tree steppe decreased from 62.54% and 10.79% in 1995 to 60.76% and 7.94% in 2025, respectively. In contrast, rainfed croplands and bare or degraded soils expanded, increasing from 17.44% and 0.82% in 1995 to 31.81% and 0.51% in 2025, respectively, relative to the total area of the municipality. The projected trend of the natural environment suggests that by 2035, tree-shrub steppe will continue to decline, while dense tree steppe is expected to expand.
Author Keywords: dynamics, satellite imagery, Kéllé, rainfed agricultural system.
Ibrahim Souley Malam Zanaidou1, Lawandi KANEMBOU2, Hammadou Younoussa Bachirou3, Waziri Mato Maman4, and Garba Zibo5
1 Laboratoire d’étude et de recherche sur les territoires sahélo-sahariens (LETRESS), Université Abdou Moumouni de Niamey, Niger
2 Département sol et Environnement, Université de Diffa, BP 78, Diffa, Niger
3 Département de sciences fondamentales, Université de Dosso, Niger
4 Département de Géographie, Université Abdou Moumouni de Niamey, Niger
5 Faculté des Sciences et Techniques, Département de Numérisation des Sciences de l’Environnement, Université de Dosso, BP 230 Dosso, Niger
Original language: French
Copyright © 2026 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
In Niger, the combined effects of climate variability and climate change, together with anthropogenic pressure over recent decades, have strongly influenced land-use dynamics, particularly within agricultural systems. In the municipality of Kéllé, located in the Gouré Department (Zinder Region), spatio-temporal landscape analysis reveals, as in many other municipalities in Niger, significant changes in landscape evolution. In the present study, the analysis of satellite imagery and the use of a Geographic Information System (GIS) made it possible to trace ongoing changes between 1995 and 2025, in order to identify general trends and support decision-making in community-based natural resource management. The main objective of this study is to detect land-use dynamics in the municipality in response to climate change and human activities. The methodology is based on the interpretation of Landsat satellite imagery from 1995, 2015, and 2025. The results obtained from land-use maps, change-detection maps between observation dates, and a predictive map up to 2035 indicate that land use in the municipality is undergoing continuous transformation. Thus, areas occupied by tree-shrub steppe and dense tree steppe decreased from 62.54% and 10.79% in 1995 to 60.76% and 7.94% in 2025, respectively. In contrast, rainfed croplands and bare or degraded soils expanded, increasing from 17.44% and 0.82% in 1995 to 31.81% and 0.51% in 2025, respectively, relative to the total area of the municipality. The projected trend of the natural environment suggests that by 2035, tree-shrub steppe will continue to decline, while dense tree steppe is expected to expand.
Author Keywords: dynamics, satellite imagery, Kéllé, rainfed agricultural system.
Abstract: (french)
Au Niger, les effets combinés de la variabilité et des changements climatiques, ainsi que la pression anthropique depuis quelques décennies influencent fortement la dynamique de l’occupation des terres, notamment dans le système agricole. Dans la commune de Kéllé, situé dans le département de Gouré (Région de Zinder), l’analyse spatio-temporelle du paysage montre, qu’à l’instar de plusieurs autres communes du Niger, des changements notoires dans l’évolution paysagère. Dans le cadre de la présente étude, l’exploitation des imageries satellitaires et l’utilisation du Système d’Information Géographique (SIG) ont permis de retracer les changements en cours entre 1995 et 2025 afin de dégager la tendance générale de ceux-ci (changements) aux fins des prises de décisions dans le cadre de la gestion des ressources naturelles communautaires. L’objectif principal de ce travail est de détecter la dynamique de l’occupation des terres dans cette commune face aux changements climatiques et aux activités humaines. La méthodologie utilisée est basée sur l’interprétation des imageries satellitaires Landsat de 1995, 2015 et 2025. Les résultats obtenus à travers les cartes d’occupation des terres, celles des changements entre deux dates d’observation, et celle de prédiction jusqu’en 2035 permettent de dire que l’état d’occupation des terres est en mutation continue dans ladite commune. Ainsi, les superficies occupées par la steppe arborée-arbustive et la steppe arborée dense sont passées respectivement 62,54% et 10,79% en 1995 à 60,76% et 7,94% en 2025. Quant aux cultures pluviales et les sols nus ou dégradés, elles ont connu une extension en superficie, passant respectivement de 17,44% et 0,82% en 1995 à 31,81% et 0,51% en 2025 par rapport à la superficie totale de la commune. La tendance évolutive du milieu naturel prévoit à l’horizon 2035 une régression de la steppe arborée arbustive, tandis que la steppe arborée dense connaitra une progression de son espace en 2035.
Author Keywords: dynamique, imageries satellitaires, Kéllé, système pluvial.
