Urban Growth And Fuelwood Distribution In Dry Tropical Africa: A Next Challenge For Sustainable Management Of Protected Areas
*Names in bold indicate Presenter
This paper, which focuses on the interactions between urban areas and protected areas in relation to energy needs in the Far North region of Cameroon, presents a dual thematic and methodological concern. First, it aims at a better understanding of the difficult integration of conservation policies in urban functions in sub-Saharan Africa. And secondly, to implement a study approach adapted to the analysis of the relationships between cities and protected areas in a context of obvious environmental vulnerability.
The remote sensing data enabled us to highlight the dynamics of vegetation cover in this reserve between 1986 and 2015, using GIS analysis. Multispectral Landsat Thematic Mapper (TM) and Enhanced Thematic Mapper (ETM+) satellite images from 1986, 2001 and 2010 were acquired and pre-processed. Multidate hybrid classification of the images was performed and four land use/land cover classes (woody savanna, shrub savanna, crops, little bare ground vegetation) was derived. The post-classification change detection techniques was performed to characterize and quantify changes in land cover and land use. The results show a decrease of the vegetation cover since 1986, with a rate of 0.51% per year. Thus, between 1986 and 2015, the clear forest and the savannah, mainly woody species, have experienced a considerable decline. The dynamics of the woods characterized by satellite image processing and GIS tools, is the consequence of the ever increasing demand for fuelwood in the surrounding localities. Moreover, field observations and analyzes of fuelwood distribution flows in the city of Maroua, enable us to highlight the contribution of the protected areas in this activity. More than 40% of the fuel wood distributed in the city of Maroua comes from protected areas (i.e. around 700 m3 of volume per year), with an estimated average consumption of 0.9 kg per household per day.