Roni Valter de Souza Guedes

IDENTIFICATION AND CLASSIFICATION SPATIOTEMPORAL OF RAINY OR DRY CRITICAL EVENTS IN PERNAMBUCO STATE

The objective of this study was to analyze the dry and wet events historically occurred in the Pernambuco state and diagnose their intensities and durations. The identification and classification of areas susceptible to critical events has become a frequent need in the current context of climate change, which has caused disasters in the world. The diagnosis based on meteorological, agricultural and hydrological impacts can be measured with the application of the methodology of the Standardized Precipitation Index (SPI) for different time scales. The SPI was able to identify critical events in the state of Pernambuco and highlight the main through their intensities and durations. Scales were analyzed from quarterly to biennial which indicated the beginning, trend, duration and intensity of events. The results identified years with rainfall events in the moderate and severe categories, but also dry events in moderate to extreme categories. It was observed that the values of correlations between SPI scales are better as they approach in time. The cluster analysis of the SPIs showed well-defined areas, up to four groups, at all scales of time, this indicates that these groups have similar behavior during critical events.