Monitoramento de secas em municípios do Agreste Paraibano (Monitoring of droughts in municipalities of Agreste Paraibano)
DOI:
https://doi.org/10.5935/1984-2295.20160086Keywords:
duração, déficit hídrico, intensidadeAbstract
Secas são fenômenos naturais que ocorrem com frequência no Semiárido do Brasil (SAB). Diante disso, objetivou-se monitorar as secas que ocorreram nos municípios paraibanos de Areia, Aroeiras, Bananeiras e Boa Vista. Os dados pluviométricos foram obtidos através da Agência Executiva de Gestão das Águas do Estado da Paraíba (AESA). O “Run Method” foi utilizado com o objetivo de identificar períodos de secas e avaliar suas características, entre elas: duração, déficit hídrico, intensidade, período de retorno e tendência. Para analisar tendência foram utilizados os testes estatísticos t-Student e Mann-Kendall. As secas mais graves, ou seja, aquelas que tiveram maiores durações, déficits hídricos e intensidades nesses municípios ocorreram durante os períodos de 1995-1999, 2012-2014, 2005-2006 e 2010. Da mesma forma, essas secas apresentaram os maiores períodos de retorno, isso significa que é baixa a probabilidade de outras secas com essa gravidade recorrer em curto prazo. Ainda foi possível perceber que houve redução na precipitação média anual em Areia e Bananeiras e aumento em Aroeiras e Boa Vista para a série estudada, mas essas tendências não foram significativas.
A B S T R A C T
Droughts are natural phenomena that occur frequently in the semiarid region of Brazil (SRB). The aim this work is monitor drought that occurred in the municipalities of the Paraíba: Areia, Aroeiras, Bananeiras and Boa Vista. The rainfall data were obtained through the Agência Executiva for Gestão das Águas (AESA) of Paraiba State. The ";Run Method"; was used in order to identify periods of drought and assess its characteristics, including: duration, intensity, water deficit, return period and trend. To analyze trends were used tests t-Student and Mann-Kendall. The more severe droughts, ie those who have had longer durations, water deficits and intensities in these counties occurred during periods of 1995-1999, 2012-2014, 2005-2006 and 2010. Similarly, these droughts had the longest return periods, that means it's low probability of other droughts with this gravity go back to occur in the short term. Can be realized that there was reduction in average rainfall annual Areia and Bananeiras and increase in the cities of Aroeiras and Boa Vista for the series studied, but these values were not significant.
Keywords: duration; water deficit; intensity.
Downloads
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2016 André Aires de Farias, Francisco de Assis Salviano de Sousa, José Thyago Aires Souza, Thiago Costa Ferreira, João Miguel Moraes Neto
This work is licensed under a Creative Commons Attribution 4.0 International License.
Authors who publish with Revista Brasileira de Geografia Física agree to the following terms:
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) license that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
Authors are permitted to make their work available online before or during the editorial process, on academic social networks, digital repositories, or preprint servers. After publication in Revista Brasileira de Geografia Física, authors are expected to update the preprint or postprint versions on the platforms where they were originally made available, providing a link to the final published version and any other relevant information, with proper recognition of authorship and the initial publication in this journal.
You are free to:
Share — copy and redistribute the material in any medium or format for any purpose, even commercially.
Adapt — remix, transform, and build upon the material for any purpose, even commercially.
The licensor cannot revoke these freedoms as long as you follow the license terms.
Under the following terms:
Attribution — You must give appropriate credit , provide a link to the license, and indicate if changes were made . You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
