The study of change in land use has been recently included in territorial planning in order to inform spatial planners and policy makers of the possible future developments and therefore optimize their management decisions. Several models have been proposed to simulate land use change. These models are used to understand and analyze the previous change in order to explore the future evolutions. In this paper, we propose a macroscopic cellular automata model for land use change by introducing local competition between land uses. By implementing our model in Drâa-valley Moroccan region, the land use change from 2003 to 2016 was simulated. The study area is characterized by a vulnerable agricultural area and with height ecological constraints. The land use maps in 2016 were used as a reference to validate the proposed model. The qualitative validation achieved a good accuracy of 80% between the observed data and the simulated data. In order to explore the land use dynamics from 2016 to 2021 two scenarios have been assumed in the study area. In the first scenario we simulated an evolution without ecological constraints. Whereas, in second scenario we have prohibited the construction in the bed of valley in order to protect agricultural area.