Abstract

Precipitation is considered the main variable for the evaluation of meteorological drought in a basin. Droughts is a phenomena of different spatial scale, so that is convenient to have simultaneous rainfall records in time and in different locations, in order to analyze their evolution in space, depending on the size and the variability of the characteristics in the basin. In Argentina, specifically in the central region, the availability of information on the spatial variability of rainfall is not usual, so drought studies in this region are limited. Due to this it is convenient to validate the rainfall information obtained through satellite missions. The present work evaluates the validity and applicability of monthly rainfall data estimated through TRMM in ten stations in the basin of the Carcarañá river in the central region of Argentina and its subsequent application to studies on meteorological droughts through a representative index (SPI). Statistical parameters such as the concordance coefficient, the correlation coefficient and the bias were used for this analysis. There was a significant variation of the parameters with respect to the height. Was observed better coefficients in stations located in plain compared with stations located in mountainous areas.