THE WATER CRISIS IN CULTURE AND ITS PLUVIAL VARIABILITY IN SÃO BENTO DO UNA-PERNAMBUCO

Abstract

Precipitation is evaluated as a relevant factor for the development of various socioeconomic and environmental activities, highlighting hydroelectric, industries, agribusiness, agriculture, aquaculture, fish farming and contribution to the increase of reservoir levels for human supply purposes. From the evaluation of precipitation climate trends and by means of indications of climate variability and possible effects of global climate change at the local level in the municipal area of São Bento do Una it is possible to quantify its future extreme variability by diagnosing its variations and provide subsidies to decision makers in the poultry, socio-environmental and socioeconomic sectors. Daily precipitation data were used from 1920 to 2016, provided by the Pernambuco Water and Climate Agency, and the Climap software was used to analyze the precipitation trend and the rates of climatic extremes, the Mann-Kendall sequential test was applied in order to verify the year in which rain trends will start. The quarterly variability of rainfall used in this study showed unsatisfactory behavior in the characterization of the rainfall regime. The historical annual rainfall total showed high spatial and temporal variation, with low rainfall rates in the rainy season. Irregular variability was found in rainfall indices and water availability, a fact that is reflected in all human activities being essential for survival, and that this leads residents and the poultry sector to suffer from great vulnerability, both water and socioeconomic.