Aplicação do índice de precipitação padronizado (SPI) para análises de secas no estado do Rio Grande do Sul

Abstract

This study addressed the application of the standardized precipitation index (SPI) in the state of Rio Grande do Sul. With the objective of identifying and evaluating the intensity of droughts on the time scales: quarterly, semi-annual and annual in the state. For this purpose, the SPI was estimated based on precipitation data from meteorological stations throughout the state that make up the Meteorological Database for Teaching and Research (BDMEP), made available by the National Institute of Meteorology (INMET) in the SPIGenerator software. The results obtained made it possible to identify the severity of droughts in the different Hydrographic Regions of the state of Rio Grande do Sul. Understanding this type of behavior allows decision makers to prepare for the management of available water resources, considering that the intensity of droughts as a result of climate change.