The objectives proposed in this study were to determine the spatial distribution of monthly average rainfall in the state, using the altitude of the rain gauge stations as co-variable and determining the number of points necessary to map the precipitation, considering the spatial dependence. The used data in this study include precipitation series ranging from 33 to 72 years, totaling 55 rain gauge stations. The data series were subjected to descriptive analysis and geostatistics. The co-kriging using the altitude as the covariateble showed considerable accuracy in the estimation of precipitation. The Kriging cross variogram showed that 37 rain gauges are enough to characterize the monthly precipitation with spatial dependence over the State.
Kriging; Cross Variograms; Number of Samples
