Evaluation of pluviometric variability in the Paraíba hydrographic Basin, in the State of Paraíba
DOI:
https://doi.org/10.6008/CBPC2179-6858.2021.006.0019Keywords:
Water resources, Rainy and dry periods, Space-timeAbstract
The State of Paraíba, for the most part, is located in the semi-arid region of Brazil, having a significant number of hydrographic basins with hydrogeologically distinct characteristics, providing recurrent economic and social difficulties. Thus, the State of Paraíba stands out as one of the NEB that most suffers a spatio-temporal variability of rainfall that interferes with the region's biodiversity. The study area of this research is the Paraíba River Hydrographic Basin, in the state of Paraíba, with an area of 20,071.83 km2 and bordering the State of Pernambuco to the West and to the South with the Rio Gramame Basin. Monthly rainfall data from the Northeast Development Superintendence (SUDENE), National Meteorological Institute (INMET) and Paraíba Water Management Executive Agency (AESA), to compose the spatio-temporal variability of BHRPB precipitation. Therefore, the mapping was performed using the software Qgiz and Golden Software Surfer. According to the historical series, it was possible to show two distinct periods, with six dry and rainy months. The period from 1980 to 2019 the annual temporal rainfall showed 26 years below the average, highlighting the year 1998 as the minimum peak of 27.9 mm and 14 above the average, with 2011 having the maximum value of 95.6 mm.
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