Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES Journal of Cellular Automata 423-442 Cellular automata MEDALUS desertification sensitivity index desertification software land degradation predominant factor 2022 PAR00025585 ENG Journal of Cellular Automata 1557-5969 ISI:000906763200006 5-6 https://www.documentation.ird.fr/hor/PAR00025585 16 Horizon (IRD) Based on coupling a continuous cellular automaton with the MEDALUS model enhanced by anthropogenic factors, DESERTICAS is specially designed to model and simulate the evolution of land degra-dation over time and space. One of the interests of this modelling is to associate rehabilitation and restoration actions through a factor, called the predominant factor, which has an overall impact on the system. The study carried out in this paper aims at extracting this prevailing fac-tor among those already involved in the desertification phenomenon through the DESERTICAS software. The comparative analysis of the effects of the different desertification factors highlights the predom-inance of man-made management in the modelling carried out. Act-ing positively on the management factor means acting indirectly on the other desertification factors in order to interrupt the sources of degrada-tion and slow down or stop land desertification. UR228 Niger