Open AccessAvaliação da evapotranspiração estimada pelo MODIS e do balanço hídrico para a bacia do Pontal-Pernambuco
Author(s) -
Pedro Vinícius da Silva Brito,
Rodrigo de Queiroga Miranda,
Ygor Cristiano Brito Morais,
M. S. B. de Moura,
Antônio Samuel Alves da Silva,
Josiclêda Domiciano Galvíncio,
Valéria Sandra de Oliveira Costa
Publication year - 2021
Publication title -
revista brasileira de geografia física
Language(s) - English
Resource type - Journals
ISSN - 1984-2295
DOI - 10.26848/rbgf.v14.5.p2866-2877
Subject(s) - geography , humanities , environmental science , philosophy
The semi-arid region of northeastern Brazil has a strong tendency to decrease precipitation with climate change. It is known that the social, economic, and environmental impacts will be very high if this happens. Evapotranspiration and water balance are important variables in public policy decision-making related to rain and water resources, as it allows for greater knowledge of the water supply in each region. Thus, evaluating different estimation methodologies for these variables provides an important contribution to the planning of environmental public policies. Given the above, this study aims to evaluate the evapotranspiration estimated with MODIS and the water balance obtained with the Soil Water Assessment Tools (SWAT) for the Pontal basin, Pernambuco, Brazil, for the year 2016. The results show the great dependence of actual evapotranspiration and runoff on the volume of rainfall in the basin. It was possible to verify that the preserved caatinga areas had the highest evapotranspiration throughout the year. Also noteworthy is the volume of water stored in the soil in these areas. The largest volume drained was present in agriculture and livestock and exposed soil. These results show the impacts of anthropic actions on the natural resources of the Po ntal basin, which can lead to greater complications in the region's land cover and water balance.