Influence of vegetation cover on evapotranspiration patterns in mountainous areas |
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Authors: | Ivan Mészároš Pavol Miklánek |
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Institution: | (1) Institute of Hydrology of SAS, Račianska 75, SK-83102 Bratislava 3, Slovakia |
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Abstract: | The study presents results of calculation of potential evapotranspiration based on vegetation cover and actual solar energy
income modeling obtained in the Jalovecky creek experimental hydrological basin in the Western Tatra mountains. Vegetation
cover in the basin is represented by Bare rock, Grass, Natural grassland, Coniferous forest and Dwarf pine. Spatial evapotranspiration patterns for vegetation cover were calculated with three different methods build in the SOLEI
model. They are Simple regression model, Radiation model by FAO and Penman-Monteith model. Vegetation cover is represented in all mentioned methods by albedo maps derived from the land use grid map. Together with
Digital elevation model (DEM) it is the main input value to the SOLEI model. Albedo coefficients influence mainly solar energy
income to the slopes. Because the Simple regression model and Radiation model by FAO are mainly based on solar energy income, the shapes of calculated spatial evapotranspiration patterns are similar to solar
energy spatial maps. Results obtained from PenmanMonteith model are more closed to vegetation maps. |
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Keywords: | digital elevation model solar radiation evapotranspiration mountainous areas |
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