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Wind speed regionalization and its influence on areal evapotranspiration prediction

Title data

Schulz, Karsten ; Huwe, Bernd ; Wörlen, Christine ; Eiden, Reiner:
Wind speed regionalization and its influence on areal evapotranspiration prediction.
In: Diekkrüger, Bernd ; Kirkby, Mike J. ; Schröder, Ulrich (Hrsg.): Regionalization in hydrology : Proceedings of an international conference held at the Technical University of Braunschweig, Germany, 10 - 14 March 1997. - Wallingford : IAHS Press , 1999 . - pp. 97-104 . - (IAHS Publication ; 254 )
ISBN 1-901502-80-5

Official URL: Volltext

Abstract in another language

Evapotranspiration as one of the basic components in the hydrological cycle plays a major role in determinining the water budget of agricultural and forestry catchments. Due to the effects of topography the controlling factors like net radiation, temperature, humidity and wind speed are highly variable in space. In this investigation, we show that spatial differences in wind speed data may result in differences in calculated potential evapotranspiration rates. The Ryan (1977) approach, to extrapolate the wind speed data of an 'undisturbed' central meteorological station to any grid point within an agricultural catchment, is introduced and compared to measurements at three different locations in the Weiherbach catchment (Kraichgau, Germany). Although only information from a digital elevation model is used, it is shown that this method provides a much better estimation of the areal windfield, than using the data from the central station alone. Distributed modelling of the water budget for the years 1994 and 1995 demonstrates that neglecting the influence of topography on wind speed will result in over-estimation of the areally averaged potential and actual evapotranspiration rates.

Further data

Item Type: Article in a book
Refereed: No
Additional notes: BAYCEER7395
BAYCEER15374
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Professorship Micrometeorology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Physics
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professorship Soil Physics - Univ.-Prof. Dr. Bernd Huwe
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 31 Aug 2015 05:51
Last Modified: 31 Aug 2015 05:51
URI: https://eref.uni-bayreuth.de/id/eprint/18962