The semi-distributed hydrological model SLURP was used in this study in order to investigate the impacts caused by coverage/land usage and climate changes on hydrological processes in the Jamari River sub-basin. The methodology makes use of Landsat images, DEM, weather stations and rain gauges data, as input parameters to the model. Real and extreme deforestation scenarios were simulated based on Prodes data. When deforestation takes place an increase in runoff is observed, being more significant during the dry season. Since a smaller quantity of water is intercepted by the canopy, evapotranspiration and infiltration also tend to reduce with deforestation. With climate change scenarios of increased temperature and precipitation, evapotranspiration and runoff tend to increase; an increased temperature and decreased precipitation tends to increase evapotranspiration and reduce runoff, infiltration and evaporation. During the dry season, the flow tends to increase considerably. This suggests that, if the annual rate of deforestation remain the same or increase, socio- environmental problems can worsen during both the dry and rainy seasons.
Amazônia; Hidrometeorologic simulation; Runoff; Rainfall; Evapotranspiration
