Influence des Facteurs Climatiques et Topographiques sur les Risques de Feux de Végétation au Centre du Bénin

This paper analyzes the relationship between climatic and topographic parameters and fire risks in the center of Benin, using climatic and topographic data and the. fire radiative power of fires hotspots acquired by MODIS sensor. Spatial inte1polation with the Natural Neighbor algorithm and the Pearson correlation has helped analyze the contribution of each parameter in the ignition and propagation of fire. The vegetation Drought Index which links the surface temperature and the ND VI through a linear regression has helped assess the fire risk. An increase in temperature, sunshine period, and wind speed augment the fire radiative power while the correlation is rather negative with the relative humidity. Altitude and slope influence also positively the fire radiative power. Out of these parameters, only temperature, sunshine period, and slope are significant at 0.05. The drought index indicates that considering the magnitude of the surface temperature, any point of the area where exists dry vegetation could be affected by the fire.