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- Title
ESTIMATIVA DA EVAPOTRANSPIRAÇÃO REAL E MAPEAMENTO DE ÁREAS CULTIVADAS EM UMA BACIA DO PROJETO DE INTEGRAÇÃO DO SÃO FRANCISCO (PISF), SEMIÁRIDO PERNAMBUCANO.
- Authors
DE BARROS DE SOUSA, LIZANDRA; DE ASSUNÇÃO MONTENEGRO, ABELARDO ANTÔNIO; FREIRE DA SILVA, THIERES GEORGE; ALVES DE CARVALHO, AILTON; DA SILVA NETO, MOISÉS ALVES
- Abstract
The Brazilian semi-arid region has limited availability of water resources, in addition, profound changes in land use and occupation are expected to occur in the river basins of Pernambuco. The objective was to evaluate the actual evapotranspiration and to map cultivated areas through remote sensing, using, respectively, the SAFER (Simple Algorithm for Evapotranspiration Retrieving) and SUREAL (Surface Resistance Algorithm) models, in the Terra Nova River Basin, in a perennial stretch. Landsat-8 satellite images from 2015 to 2020 were selected. The Normalized Difference Vegetation Index (NDVI), albedo, surface temperature, reference evapotranspiration, and actual evapotranspiration were calculated. Images were processed using the Google Earth Engine (GEE) platform and QGIS 3.16 software. There was an increase in the vegetation cover index. Regions with higher actual evapotranspiration values are linked to those with lower temperatures. It was observed a smaller number of cultivated areas in the Terra Nova River stretch in the 2015 images. Also, it was verified an increase in agriculture in the riverside region along this, in its perennial stretch, of 29.5; 15.2; 7.7; 7.6; and 12.9 km² on 07/18/2016, 06/22/2018, 10/28/2018, 11/13/2018, and 12/20/2020, respectively. In addition to the intensity of precipitation, the release of PISF waters may have contributed to the increase in irrigated areas in the region.
- Subjects
RECIFE (Brazil); NORMALIZED difference vegetation index; WATER supply; REMOTE-sensing images; REMOTE sensing; SURFACE resistance
- Publication
Revista IRRIGA - Brazilian Journal of Irrigation & Drainage, 2021, Vol 26, Issue 3, p565
- ISSN
1413-7895
- Publication type
Article
- DOI
10.15809/irriga.2021v26n3p565-583