| Autor: |
João Antônio Lorenzzetti, José Luiz Stech, Carlos Alberto Sampaio de Araújo, Enner Herenio Alcântara, Marcelo Pedroso Curtarelli |
| Jazyk: |
English<br />Spanish; Castilian<br />Portuguese |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
Revista Ambiente & Água, Vol 8, Iss 1, Pp 272-289 (2013) |
| Druh dokumentu: |
article |
| ISSN: |
1980-993X |
| DOI: |
10.4136/ambi-agua.1083 |
| Popis: |
The object of this work was to study the dynamics of evaporation in the Itumbiara reservoir, located in Central Brazil, using MODIS-derived water surface temperature (product MOD11A1) and meteorological data acquired over the water surface. The evaporation rates were derived from latent heat flux, estimated through a mass transfer model. The estimates were carried out for the period between 1/1/2010 and 31/12/2010. The results showed that evaporation rate tends to increase from January to September and then decrease from September to December. The evaporation rate reached values near 20 mm day-1 in Itumbiara reservoir during the dry season in 2010. The mean evaporation rate for the wet season was 3.66 mm day-1 and 8.25 mm day-1 for the dry season. The total water volume evaporated from Itumbiara reservoir during 2010 was estimated at about 1.7 billion m³ (2,300 mm) which represents 10% of total reservoir volume. The results suggest that advection is the main transport mechanism which drives the evaporation in Itumbiara. The convective processes contribute secondarily to evaporation in Itumbiara reservoir. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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