Influência da precipitação e evolução do uso e cobertura da terra no reservatório Engenheiro Armando Ribeiro Gonçalves

Engenheiro Armando Ribeiro Gonçalves (ARG) reservoir is the largest in the state of Rio Grande do Norte and plays a very important role in mitigating the severe conditions found in the semiarid region of Northeastern Brazil. In addition to the climatic characteristics that already make the semi-a...

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Detalhes bibliográficos
Autor principal: Macêdo, Alyne Soares de
Outros Autores: Lima, Kellen Carla
Formato: bachelorThesis
Idioma:pt_BR
Publicado em: Universidade Federal do Rio Grande do Norte
Assuntos:
Semiárido
Índice de extremos climáticos
SPI
Correlação Cruzada
Uso e Ocupação do Solo
Semiarid
Extreme climate index
Cross-correlation
Land use and occupation
CNPQ::ENGENHARIAS::ENGENHARIA SANITARIA::RECURSOS HIDRICOS
CNPQ::CIENCIAS EXATAS E DA TERRA::GEOCIENCIAS::METEOROLOGIA::CLIMATOLOGIA
Endereço do item:https://repositorio.ufrn.br/handle/123456789/53380
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Descrição
Resumo:Engenheiro Armando Ribeiro Gonçalves (ARG) reservoir is the largest in the state of Rio Grande do Norte and plays a very important role in mitigating the severe conditions found in the semiarid region of Northeastern Brazil. In addition to the climatic characteristics that already make the semi-arid reservoirs more vulnerable, there is still pressure due to climate change and land use and occupation along the basin. Considering the above and the importance of the reservoirs in the socioeconomic development of the regions where they are located, this work aims to evaluate the influence of precipitation and the evolution of land use and cover in the Armando Ribeiro reservoir during the period from 1986 to 2021. Grid-point precipitation data were used with a resolution of 0.05º × 0.05º provided by the Climate Hazards Group InfraRed Precipitation With Station (CHIRPS) and the historical series of the reservoir volume was obtained from the Reservoir Monitoring System (SAR) of the National Water and Basic Sanitation Agency (ANA). The methodology applied consisted of evaluating the trend of seven extreme precipitation indices at a point downstream and one upstream of the water body, then the Standardized Precipitation Index and the Cross-Correlation were calculated. Lastly an evaluation of changes in land use and occupation around the reservoir over the period was carried out. The results showed increased pressure from agricultural activities, which can compromise the quality of the water in the reservoir and affect the storage capacity, statistically significant lags between precipitation and the change in the volume of the reservoir from one to three months. Regarding the extreme precipitation indices, no statistically significant trends were obtained, which may be a consequence of the high temporal variability of precipitation or the statistical method chosen to represent the trend.

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