A study of spacial analysis was carried out with the rainfalls frequencies for the areas of the Atlântico hydrographic region in the eastern part in the State of Minas Gerais. The physiographic variables, such as natural vegetation, topography and wind direction, as well as the total annual rainfall using the geoestatistic Kriging technique to interpret the geospatial distribution of the rainfall frequency groups that represented the areas with homogeneous characteristics. In general, the geostatistic interpolator provided a good estimate of the total annual average rainfall for the studied area, except for the areas where the rainfall station density was relatively low. The physiographic variables and the continuous surface areas of total annual average rainfall was nearly correlated to the space distribution of the rainfall frequencies groups that represented the hydroclimatically homogeneous areas. The topography and the predominant winds at low levels showed to be the cause of the micro scale mechanisms of rainfall spatial distribution.
rainfall; homogeneous areas; physiographic variable
