In a five years-old Eucalyptus plantation and in a savannah with Loudetia arundinacea, gross precipitations, throughfall and soil water content were measured weekly during the rainy season from october 1996 to april 1997 and during the dry season, from june to september 1997. Actual evapotranspiration, net interception and transpiration was derived from the water balance equation method. Moreover, transpiration was measured using the radial flow meter. The soil water profiles were established, giving an account of preferential water uptake zones and rooting depths of Eucalyptus plantation and savannah species