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Proceedings Paper

Mesoscale modeling of evapotranspiration using remote sensing data
Author(s): Wolfram Mauser
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Paper Abstract

For the purpose of spatial modeling of actual evapotranspiration (aET) at different scales from the field- to the landscape-scale the PROMET model-family has been developed. It is based on a gridded approach which allows the easy integration of parameters derived from remote sensing data. The model consists of a kernel for the process description and a spatial parameter modeler, which provides and organizes the spatial input data at different scales from the field- to the mesoscale. It is shown, that the results of the kernel-model at filed scale compares well with measured aET for different land-uses. After verification on the field scale the model is run on a 100 X 150 km mesoscale test-site at a resolution of 1 km. Fractional land-cover was determined using time-series of NOAA-AVHRR data and an unmixing procedure for forest, grassland, agriculture, urban areas and water. It is shown, that this unmixed land-use information corresponds well with a LANDSAT land-use classification conducted in the test region. A digital elevation model and a soil map, interpolated meteorological data from the German Weather Service and data on the development of LAI and plant height was added to the data set. The model was run over one growing season on an hourly basis. To verify the spatial pattern of the modelled aET the model results of one date were compared with surface temperature distributions measured from NOAA/AVHRR at the same time. Both are in good agreement.

Paper Details

Date Published: 17 January 1997
PDF: 10 pages
Proc. SPIE 2959, Remote Sensing of Vegetation and Sea, (17 January 1997); doi: 10.1117/12.264259
Show Author Affiliations
Wolfram Mauser, Univ. of Munich (Germany)

Published in SPIE Proceedings Vol. 2959:
Remote Sensing of Vegetation and Sea
Giovanna Cecchi; Guido D'Urso; Edwin T. Engman; Preben Gudmandsen, Editor(s)

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