Dynamique régressive de la formation forestière de Yamba Berté au Tchad : le crépuscule d’une forêt classée

Abstract

The maintenance and development of forest formations depend on the degree of anthropization and environmental conditions. Chad has considerable forest formations scattered in the southern part of the country. Some of them, in particular that of Yamba Berté northwest of the city of Kélo, have undergone a regressive expansion over the last decades, that is detrimental to ecological balance. The present study analyzes the evolution of soil occupation and ligneous plantings in relation to agropastoral pract ices and
uses in and around the classified forest formation of Yamba Berté. The methodology combines an analytical approach of the sat ellite images, covering the study area and the field surveys, on the perception of the processes by the populations. Such an a pproach meets the requirement to set up diagnostic tools using spatial data and to design methods to sustainably manage forest formations in semi-humid areas, in line with the people's way of life. The first results show that the perception of populations is in agreement with the evolutionary characteristics and trends observed.