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KMID : 1024520180270020135
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Journal of the Environmental Sciences
2018 Volume.27 No. 2 p.135 ~ p.141
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Influence of Scaling in Drone-based Remotely Sensed Information on Actual Evapotranspiration Estimation
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Lee Khil-Ha
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Abstract
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The specification of surface vegetation is essential for simulating actual evapotranspiration of water resources. The availability of land cover maps based on remotely collected data makes the specification of surface vegetation easier. The spatial resolution of hydrologic models rarely matches the spatial scales of the vegetation data needed, and remotely collected vegetation data often are upscaled up to conform to the hydrologic model scale. In this study, the effects of the grid scale of of surface vegetation on the results of actual evapotranspiration were examined. The results show that the coarser resolution causes larger error in relative terms and that a more realistic description of area-averaged vegetation nature and characteristics needs to be considered when calculating actual evapotranspiration.
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KEYWORD
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Actual evapotranspiration, Aggregation, Scale, Vegetation index
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