Abstract
From medium-resolution satellite images (Landsat TM, ETM+ and OLI), the spatial dynamics of land cover and land use are highlighted. The objective of this study is to quantify the evolution of land use in the watershed of the Lobo River upstream of Nibéhibé between 1986 and 2019 in order to analyze the impacts of human activities on the landscape. The study method was based, on the one hand, on the processing of satellite images, for the analysis of the dynamics of land use and, on the other hand, on the CA-Markov model, for the prediction of land use by 2050. It emerged from this study that the land use maps produced made it possible to highlight the spatio-temporal dynamics of land use on the basin. For the period from 1986 to 2019, there is a decrease in the area of forests in favor of built-bare ground and crops and fallows. A land use scenario for the years 2019 and 2050 was simulated with an accuracy of 87.11%. The regressive trend in forests seems to continue in the future with current land use practices.
Highlights
The lands of the world are undergoing profound spatial changes
Analysis of these figures indicates a decrease in the surface areas of water and forests, which respectively go from 0.63% to 0.29%; from 76.22% to 6.73%, and an increase in the areas occupied by degraded forests, built-bare ground and crops and fallows, which rose respectively from 18.73% to 26.27%; from 1.87% to 7.95% and from 2.56% to 58.76%
We note an annual average increase of 1.83% and 9.48% respectively in the areas of degraded forests and built-bare ground as well as a strong annual average increase of 21.98% in the areas of crops and fallows of the study area
Summary
The lands of the world are undergoing profound spatial changes. In West Africa and in Côte d’Ivoire, these spatial changes which result in the degradation of the vegetation cover are increasing day by day.Like the developing countries, Côte d’Ivoire has an economy heavily dependent on the agricultural and forestry sector, leading to a rapid decrease in forest areas [1]. The lands of the world are undergoing profound spatial changes. In West Africa and in Côte d’Ivoire, these spatial changes which result in the degradation of the vegetation cover are increasing day by day. Côte d’Ivoire has an economy heavily dependent on the agricultural and forestry sector, leading to a rapid decrease in forest areas [1]. Forest areas have decreased from around 14 million hectares in 1912 to nearly 2 million hectares in 2000 [2] [3]. The vegetation cover of the Center-West area has not escaped this deforestation
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