Evapotranspiração real diária em sub-bacias do Paracatu, utilizando produtos do sensor Modis

et al. 2017

R_I

ESTIMATIVA DE PARÂMETROS BIOFÍSICOS E EVAPOTRANSPIRAÇÃO REAL NO SEMIÁRIDO PERNAMBUCANO UTILIZANDO SENSORIAMENTO REMOTO FREDERICO ABRAÃO COSTA LINS1; DIEGO CEZAR DOS SANTOS ARAÚJO2; JHON LENNON BEZERRA DA SILVA2; PABRÍCIO MARCOS OLIVEIRA LOPES3; JOSÉ DIORGENES ALVES OLIVEIRA2 E ANDREY THYAGO CARDOSO SANTOS GOMES DA SILVA1 1 Mestrandos em Engenharia Agrícola – Departamento de Engenharia Agrícola, Universidade Federal Rural de Pernambuco (UFRPE). Av. D. Manoel de Medeiros, SN; Dois Irmãos, Recife, Pernambuco, Brasil; CEP: 52171-900. E-mail: frederico_acl@hotmail.com (Autor para correspondência); andreythyago@gmail.com; 2 Mestres em Engenharia Agrícola e Doutorandos – Departamento de Engenharia Agrícola da UFRPE. E-mail: diego@agro.eng.br; jhonlennoigt@hotmail.com; josediorgenes@gmail.com; 3 Doutor em Sensoriamento Remoto; Professor adjunto da Universidade Federal Rural de Pernambuco (UFRPE), Recife, Pernambuco, Brasil. E-mail: pabriciope@gmail.com. 1 RESUMO Objetivou-se estimar e avaliar a distribuição espaço-temporal de parâmetros biofísicos e a evapotranspiração real diária para o município de Arcoverde, Pernambuco, durante estações seca e chuvosa, utilizando imagens orbitais do satélite Landsat-8 de sensores OLI/TIRS, para as datas de passagem: 14/01/2015 e 02/12/2016, processadas com o algoritmo SEBAL. Foram gerados os seguintes mapas temáticos: Índice de Vegetação da Diferença Normalizada (NDVI), Índice de Área Foliar (IAF), albedo e temperatura de superfície (Ts), saldo de radiação instantâneo (Rn) e evapotranspiração real diária (ETr). O NDVI foi maior em janeiro de 2015 e o albedo e Ts foram maiores em 2016 (0,23 e 37,44 °C), ao passo que em 2015, os valores foram de 0,20 e 34,11 °C, relacionando-se às condições meteorológicas e uso do solo. O Rn variou de 520,06 a 540,22 W m-2 nos dois anos e, para a ETr, verificou-se a maior média em janeiro de 2015 (3,41 mm dia-1), devido ao maior NDVI e precipitações, evidenciando maior disponibilidade de água na vegetação e no solo. As técnicas de sensoriamento remoto possibilitaram o monitoramento do município de Arcoverde-PE, determinando os parâmetros biofísicos nos diferentes usos do solo, predizendo os processos futuros de degradação e consequente desertificação na localidade. Palavras-chave: caatinga, vegetação, monitoramento ambiental, uso do solo, agrometeorologia. LINS, F. A. C.; ARAÚJO, D. C. dos S.; SILVA, J. L. B. da; LOPES, P. M. O.; OLIVEIRA, J. D. A.; SILVA, A. T. C. S. G. daBIOPHYSICAL PARAMETERS ESTIMATE AND ACTUAL EVAPOTRANSPIRATION IN THE SEMIARID REGION OF THE STATE OF PERNAMBUCO, BRAZIL, USING REMOTE SENSING 2 ABSTRACT The purpose of this paper is to estimate and evaluate the spatial-temporal distribution of biophysical parameters and the actual daily evapotranspiration index for the municipality of Arcoverde, Pernambuco, during the dry and rainy season, using orbital images from the Landsat-8 satellite and OLI/TIRS sensors for the following dates in which the satellite passed over the region: 01/14/2015 and 02/12/2016, processed using the SEBAL algorithm. The following thematic maps were generated: Normalized Difference Vegetation Index (NDVI), Leaf Area Index (LAI), albedo and surface temperature (Ts), Net radiation (Rn) and daily reference evapotranspiration (ETr). The NDVI was higher on January 2015 and the albedo and Ts were higher in 2016 (0.23 and 37.44 °C), whereas in 2015, the values were 0.20 and 34.11 °C, related to the meteorological conditions and the land use. The Rn ranged from 520.06 to 540.22 W m-² in two years of study and, for the ETr, the highest average was recorded on January 2015 (3.41 mm day-1), due to the higher NDVI and rainfall index, evidencing greater availability of water in the vegetation and soil. The remote sensing techniques allowed the monitoring of the municipality of Arcoverde, determining the biophysical parameters in the different uses of soil, anticipating the future degradation processes and consequent desertification in the place. Keywords: caatinga, vegetation, environmental monitoring, use of the soil, agrometeorology.

Section: Introductionunclassified

Estimativa De Parâmetros Biofísicos E Evapotranspiração Real No Semiárido Pernambucano Utilizando Sensoriamento Remoto

Lins

Araújo

et al. 2017

R_I

Jour. Hypers. Rem. Sensg.

“…In this sense, SEBAL (Surface Energy Balance Algorithm for Land) allows the estimation of energy flows that occur in the Earth's surface interface with the atmosphere from the data obtained through remote sensing. Latent heat flow is determined as a residue of the energy balance, the net radiation, heat flow in soil and sensitive heat flow must be estimated for the model processing steps (Lima et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Study of biophysical parameters using remote sensing techniques to Quixeré-CE region.

Borges¹,

Medeiros²,

Ribeiro³

et al. 2016

This work aims to analyze the behavior and the spatial variability of energy fluxes, albedo, surface temperature and vegetation index (NDVI) through the SEBAL algorithm, used in remote sensing for different surfaces in the region of Quixeré-EC. It was used TM-Landsat 5 satellite images for the dates October 24, 2005 and August 8, 2006, where the SEBAL algorithm was applied to calculate the fluxes of H, LE, Rn, G, and the surface albedo. From the clippings of a coverage area of banana orchard, savanna and bare soil, in order to check the H + LE and Rn-G components of energy balance. Correlations greater than 0.99 was observed between the components of energy balance H + LE and Rn-G, the relationship between surface albedo and radiation balance in the orchard area showed higher correlations to 0.88, the area comprised by savanna, for the day 297 showed no good correlation between variables, approximately 69% of unexplained variation in day 220 was about 0.88 correlation between the variables, this fact is associated homogeneous characteristics of the area that presented an increase of moisture available in relation to day 297.

“…Silva et al (2012) also observed G values, in general, lower than 150 W m -2 , similar to those verified in this study. Lima et al (2014) observed mean G between 76.26 and 134.06 W m -2 . According to Allen et al (2005Allen et al ( , 2007 and Bezerra et al (2008), the variation in the ratio of heat flow in the soil/irradiance balance is related to the configuration of the local soil-plant system, varying according to the type of soil, the amount of water in the soil, the type of cover and the local microclimate.…”

Section: Resultsmentioning

confidence: 82%

Evapotranspiration of banana using the SEBAL algorithm in an irrigated perimeter from the Northeastern Brazil

Guerra

Rev. bras. eng. agríc. ambient.

et al. 2021

The study aimed to estimate the evapotranspiration of banana (Musa spp.) in an irrigated perimeter of the municipality of Barbalha, CE, Brazil, using the Surface Energy Balance Algorithm for Land (SEBAL) model and to compare these results with those estimated using the Penman-Monteith method. Landsat-8 OLI/TIRS satellite images of May 22, 2016, August 10, 2016, and October 29, 2016 and data on temperature, relative humidity, wind speed and solar irradiance, obtained from an automatic weather station, installed close to the experimental area were used. The bands were stacked, and the stacked images were cut, then mathematical operations and evapotranspiration estimation were performed, whose actual daily banana values, estimated by the SEBAL algorithm, were 4.70; 5.00 and 6.50 mm, respectively, for May 22, August 10, and October 29, 2016. Comparing the daily ETr given by SEBAL with that obtained by the Penman-Monteith method, absolute errors of 0.26, 0.44, and 0.64 mm d-1 were observed for May 22, August 10, and October 29, 2016, respectively. These errors are within the ranges accepted in the literature.