%0 Conference Proceedings
%4 sid.inpe.br/marte2/2017/10.27.12.21.44
%2 sid.inpe.br/marte2/2017/10.27.12.21.45
%@isbn 978-85-17-00088-1
%F 59522
%T Influência da topografia sobre a distribuição espacial dos fluxos de energia e da evapotranspiração atual obtidos pelo modelo SEBAL na bacia hidrográfica do rio Piabanha/RJ
%D 2017
%A Lima, Ricardo Neves de Souza,
%A Ribeiro, Celso Bandeira de Melo,
%@electronicmailaddress ricardo.s.lima@ibge.gov.br
%E Gherardi, Douglas Francisco Marcolino,
%E Aragão, Luiz Eduardo Oliveira e Cruz de,
%B Simpósio Brasileiro de Sensoriamento Remoto, 18 (SBSR)
%C Santos
%8 28-31 maio 2017
%I Instituto Nacional de Pesquisas Espaciais (INPE)
%J São José dos Campos
%P 1597-1604
%S Anais
%1 Instituto Nacional de Pesquisas Espaciais (INPE)
%X Evapotranspiration and energy fluxes in mountainous terrain are influenced by variation in the solar radiation distribution and surface temperature in different topographic conditions. The SEBAL model allows the estimation of the surface energy fluxes by the use of meteorological and orbital data. However, this model has been mainly applied over flat terrain, requiring the evaluation of topographic effects on its results. This study aims to evaluate the results of SEBAL model, with modifications to include the topography in the calculation of some of its input parameters in the Piabanha river basin located in mountainous region of Rio de Janeiro State, using TIRS/OLI Landsat-8 imagery and SRTMGL1 Digital Elevation Model. The results indicated that the energy fluxes and evapotranspiration estimated by the modified SEBAL allowed to obtain more heterogeneous patterns of energy partitioning when compared to SEBAL without modification. In shaded slopes the modified SEBAL showed large differences in relation to non-modified SEBAL, with -64,3% for the net radiation (Rn) and -75,9% for actual evapotranspiration (ETr). In these areas the modified SEBAL was able to represent more adequately the distribution of surface energy fluxes. The differences reflects the impacts of the complex relief on mass and energy fluxes, especially regarding the exposure conditions of slopes to solar radiation.
%9 Hidrologia
%@language pt
%3 59522.pdf