Alibori is by excellence, a pastoral cattle breeding region subjected to many climatic constraints which block the development of the rural world. This article studied the impact of the pluviometric fluctuations on the fodder production in the Department of Alibori. For that purpose, the Maximum Value Composite (MVC) method was used for the image processing Landsat OLI/TIRS of 2013 and 2014. The follow-up of the fodder production is made through the decadal data during rain seasons by the growth index standardized (ICN). The chi-square test was used for to evaluate the correlation between the values of ICN and precipitations. The MaxEnt model made it possible to evaluate the level of importance of precipitation in the growth of the fodder resources. The average values of the ICN observed in the sudanian domain are higher than those of the sudano-sahelian field. The evolution of the index of standardized growth follows the gradient south-north. One notes overall a relation between the pace of ICN and the pluviometric height during every year and especially for period of growth ranging between May at September. The studied fodder herbaceous species develop better when monthly pluviometry oscillates around 20 mm. Monitoring the spatio-temporal dynamics of fodder biomass provided a better account of the annual production of crops and pastures, thus making it possible to implement strategies in the spatial mobility of the cattle herd.

The present study aims to analyze the hydropluviometric variability and the dynamic of land cover in the catchment of the Sota located at the North-east of Benin. It is based on the exploitation, on one hand, of rainfall and runoff data over the period 1965-2010 and, on the other hand, of satellite images Landsat TM of 1995 and Landsat 8 OLI/TIRS of 2013. The calculation of rainfall and hydrometric index and the application of statistical tests were used to analyze the hydropluviometric variability in the catchment of Sota. This variability is marked by similar fluctuations of rainfall and runoff. The break identified on rainfall and hydrometric series in 1970 is followed by a rainfall deficit of 6,76 % and a flow deficit of 33,75 %. The analysis of land cover maps produced from satellite images made it possible to release the land cover dynamic. This dynamic is characterized by the regression of natural vegetation formations to the profit of anthropic formations. The crops areas and fallows knew the greatest expansion with an annual growth rate of 6, 16 %. The degradation of the vegetation cover is undoubtedly one of the factors of the persistence of the relatively high level of the hydrometric deficit in the watershed of Sota.