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| Titel |
A global comparison of four potential evapotranspiration equations and their relevance to stream flow modelling in semi-arid environments |
| VerfasserIn |
M. Weiss, L. Menzel |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7340
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| Digitales Dokument |
URL |
| Erschienen |
In: Advances and visions in large-scale hydrological modelling ; Nr. 18 (2008-06-20), S.15-23 |
| Datensatznummer |
250013857
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| Publikation (Nr.) |
 copernicus.org/adgeo-18-15-2008.pdf |
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| Zusammenfassung |
| This study compares four different potential evapotranspiration equations
according to Priestley Taylor, Kimberly Penman, Penman Monteith (FAO-56) and
Hargreaves on a global basis to demonstrate their difference, and assess
their impact on the calculation of stream flows. The various equations of
potential evapotranspiration show great differences in magnitude. But due to
the limited availability of validation data, it is difficult to assess which
method is the physically most reasonable to be applied. According to this
study, the radiation-based Priestley Taylor equation proved to be most
suitable for a global application. For the calculation of stream flows,
however, the processes involved in the derivation of actual
evapotranspiration values from potential evapotranspiration values appear
more relevant than the absolute value of the potential evapotranspiration
itself. |
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