Extremos climáticos na Bacia do Rio Capibaribe: estudo de caso no Município de Santa Cruz do Capibaribe - PE.

Abstract

Climate change interferes with the day-to-day population, the economy and the infrastructure of cities. Lack of water in large and small cities in the country has been a central theme in recent discussions. This work aims to classify through the Rainfall Anomaly Index (IAC) the climatic patterns and intensity of extreme annual events in the municipality of Santa Cruz do Capibaribe-PE. In addition, it intends to carry out the climatic classification of the municipality, according to the Thornthwaite methodology (1948). The selected rainfall stations present data from 1962 to 2016. Data on climatic extremes (dry and rainy) were obtained from the digital platform of the Integrated Disaster Information System (S2ID) of the Ministry of National Integration. After the analysis, it was possible to identify changes in the climate pattern, with a predominance of drier years from the 1980s onwards, which resulted in a decrease in the total annual precipitation volumes for the studied area. From the analysis of the average monthly rainfall data, it was found that the rainy season extends from March to July, and the dry period predominates from August to December. Regarding the impacts resulting from extreme climatic events, the majority of documents issued declaring a state of emergency were in years considered dry, 87.5%, with a lower number of documents issued in rainy years, 12.5%. In those years in which decrees were issued, there were losses to agriculture, livestock and water supply, so these impacts corroborate the importance of the use of climatic data for territorial planning in order to minimize the risks to local communities.