Detection of Drought Events in Setúbal District: Comparison between Drought Indices

Due to the lack of a general drought definition, water users and managers have developed used different indices. Many studies using indices been made so as detect events or just compare their results assess advantages disadvantages. In Portugal, these done for common indices; however, an integrated evaluation comparison recent data is needed. Therefore, this study intended give updated overview behaviour proposed This proposes usage PDSI, scPDSI, SPI SPEI. With exception all calculated through R packages. The studied regions in mainland Portugal suggest that situations are, general, most significant frequent than wet periods. From our results, we can conclude model more sensitive extreme them earlier. scPDSI SPEI are reliable monitorization at medium long spells, which might represent environmental interactions closely reality. Also, tends reduce importance short period recovering. It then advisable impact scientifical consider least some broader complete understanding be studied.