Roni Valter de Souza Guedes, Fabrício Daniel dos Santos Silva, Francisco de Assis Salviano de Sousa, Vicente de Paulo Rodrigues da Silva


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.


Índice de precipitação padronizado, eventos críticos, agrupamento


BELAYNEH, A.; ADAMOWSKI, J.; KHALIL, B.; OZGA-ZIELINSKI, B. Long-term SPI drought forecasting in the Awash River Basin in Ethiopia using wavelet neural network and wavelet support vector regression models. Journal of Hydrology, 508, p. 418–429, 2014.

GOCIC, M.; TRAJKOVIC, S. Spatiotemporal characteristics of drought in Serbia. Journal of Hydrology, 510, p. 110–123, 2014.

HUGHES, B.L.; SAUNDERS, M. A. A drought climatology for Europe. Int. Journal of Climatolology, 22, 1571–1592, 2002.

MASUD, M.B.; KHALIQ, M.N. ; WHEATER, H.S. Analysis of meteorological droughts for the Saskatchewan River Basin using univariate and bivariate approaches. Journal of Hydrology, 522, p. 452–466, 2015

MCKEE, T. B.; DOESKEN, N. J.; KLIEST, J. The relationship of drought frequency and duration to time scales. In: Proceedings of the Eighth Conference on Applied Climatology, Anaheim, CA, January 17–22. American Meteorological Society, Boston, MA, USA, pp. 179–184, 1993.

QIN, Y.; YANG, D.; LEI, H.; XU, K.; XU, X. Comparative analysis of drought based on precipitation and soil moisture indices in Haihe basin of North China during the period of 1960–2010. Accepted in Journal of Hydrology, 2014.



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