Determination of real evapotranspiration daily in areas of Jaiba irrigated project (Minas Gerais, Brazil) through images Landsat 5 – TM
This study aimed to estimate evapotranspiration in irrigated areas of Jaíba project (MG) and surrounding areas through satelitários data. Five images of Landsat 5 -TM were used, orbit 219 point 70, 2011. The estimate of daily evapotranspiration was obtained by SEBAL algorithm (Surface Energy Balance...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2017 |
| País: | Brasil |
| Institución: | Universidade Estadual de Montes Claros (UNIMONTES) |
| Repositorio: | Revista Cerrados (Montes Claros. Online) |
| Idioma: | portugués |
| OAI Identifier: | oai:ojs2.periodicos.unimontes.br:article/1333 |
| Acceso en línea: | https://www.periodicos.unimontes.br/index.php/cerrados/article/view/1333 |
| Access Level: | acceso abierto |
| Palabra clave: | Evapotranspiração; SEBAL; Projeto Jaíba. Evapotranspiration; SEBAL; Jaíba project. Evapotranspiración; SEBAL; Proyecto Jaíba. |
| Sumario: | This study aimed to estimate evapotranspiration in irrigated areas of Jaíba project (MG) and surrounding areas through satelitários data. Five images of Landsat 5 -TM were used, orbit 219 point 70, 2011. The estimate of daily evapotranspiration was obtained by SEBAL algorithm (Surface Energy Balance Algorithm for Land) .The SEBAL consists of several stages, consisting in estimating the radiation balance and energy balance and evapotranspiration. To obtain these parameters, we used data from the weather station located on the Landsat scene. Mean values for evapotranspiration were obtained within 24 hours of 6.85 mm.dia-1, 4,0 mm.dia-1, 2,6 mm.dia-1, 2,2-1 and 3 mm.dia , 4 mm.dia-1 for Julian days DJ 31, DJ 111, DJ 175, DJ 191 and DJ 255, respectively. It was observed that the evapotranspiration in growth in the period analyzed due to the amount of radiation available for each day, indicating a behavior in the areas of deciduous seasonal forest. The technique used was efficient in the analysis of the components studied, and the SEBAL an important tool for environmental management of water resources. |
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