The mean monthly actual evapotranspiration presented in the map below shows a clear seasonal pattern, which follows the rainfall seasons within the basin. Within the equatorial lakes region and the Ethiopian highlands, which experience high losses due to evapotranspiration, it is seen that the highest actual evapotranspiration losses occur within the months of June – October with the highest being in August. Low values within this part of the basin are registered within the months December – February
