Geospatial cluster analysis of the state, duration and severity of drought over Paraíba State, northeastern Brazil.

Autor: Brasil Neto RM; Department of Civil and Environmental Engineering, Federal University of Paraíba, Brazil., Santos CAG; Department of Civil and Environmental Engineering, Federal University of Paraíba, Brazil. Electronic address: celso@ct.ufpb.br., Silva RMD; Department of Geosciences, Federal University of Paraíba, Brazil., Santos CACD; Academic Unit of Atmospheric Sciences, Federal University of Campina Grande, Brazil., Liu Z; Center for Spatial Information Science and Systems (CSISS), College of Science, George Mason University, USA; NASA Goddard Earth Sciences Data and Information Services Center GES DISC, Greenbelt, MD, USA., Quinn NW; Department of Geography and Environmental Management, University of the West of England, Bristol, UK.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2021 Dec 10; Vol. 799, pp. 149492. Date of Electronic Publication: 2021 Aug 05.
DOI: 10.1016/j.scitotenv.2021.149492
Abstrakt: Droughts threaten water resources, agriculture, socio-economic activities and the population at the global and regional level, so identifying areas with homogeneous drought behaviors is an important consideration in improving the management of water resources. The objective of this study is to identify homogenous zones over Paraíba State in relation to the state, duration and severity of droughts that have occurred over the last 20 years (1998-2017) using hierarchical cluster analysis based on both gauge-measured and Tropical Rainfall Measuring Mission (TRMM) estimated rainfall data (TMPA 3B42). The drought series were calculated using the Standardized Precipitation Index (SPI) based on eight time scales and were grouped according to drought state, duration and severity time series. The integrated results of state, duration and severity of droughts indicate that there is a basis for dividing Paraíba State into two major regions (a) Zone I, formed by Mata Paraibana and Agreste Paraibano, and (b) Zone II, composed by Borborema and Sertão Paraibano. This division is evident when assessing short-term droughts, but in the case of long-term droughts, Paraíba State has a high similarity in terms of drought state, duration, and severity. Factors such as proximity to the ocean, active climatic systems, and the local relief configuration were identified as influencing the drought regime. Finally, it is concluded that TMPA rainfall estimates represent a valuable source of data to regionalize and identify drought patterns over this part of Brazil and that other studies of this type should be carried out to monitor these phenomena based on other satellite-based rainfall data, including the Global Precipitation Mission (GPM).
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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