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| Titel |
On the importance of including vegetation dynamics in Budyko's hydrological model |
| VerfasserIn |
R. J. Donohue, M. L. Roderick, T. R. McVicar |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 11, no. 2 ; Nr. 11, no. 2 (2007-03-13), S.983-995 |
| Datensatznummer |
250009228
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| Publikation (Nr.) |
 copernicus.org/hess-11-983-2007.pdf |
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| Zusammenfassung |
| The Budyko curve describes the patterns observed between between climate, evapotranspiration
and run-off and has proven to be a useful model for predicting catchment energy and water balances. In this
paper we review the Budyko curve's underlying framework and, based on the literature, present an
argument for why it is important to include vegetation dynamics into the framework for some
purposes. The Budyko framework assumes catchments are at steady-state and are driven
by the macro-climate, two conditions dependent on the scales of application, such that the framework's reliability
is greatest when applied using long-term averages (≫1 year) and to large catchments (>10 000 km2).
At these scales previous experience has shown that the hydrological role of vegetation does not need to be explicitly considered
within the framework. By demonstrating how dynamics in the leaf area, photosynthetic capacity and rooting depth of vegetation
affect not only annual and seasonal vegetation water use, but also steady-state
conditions, we argue that it is necessary to explicitly include vegetation dynamics into the
Budyko framework before it is applied at small scales. Such adaptations would extend the
framework not only to applications at small timescales and/or small catchments but to operational
activities relating to vegetation and water management. |
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