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| Titel |
Subdaily evapotranspiration rate calculation from streamflow summer diel signal |
| VerfasserIn |
Z. Gribovszki, P. Kalicz, J. Szilagyi |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250025414
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| Zusammenfassung |
| Diel signal of hydrological variables (e.g., shallow groundwater level or streamflow rate)
are rarely investigated in the hydrologic literature although these short-term fluctuations
may incorporate useful information for the characterization of hydro-ecological systems.
Riparian vegetation (especially forest) typically has a great influence on groundwater
level and groundwater-sustained baseflow, therefore calculation of the correct
evapotranspiration rates is very important for natural protection tasks and water
resources management.
Recently a new technique was developed by us to calculate daily or even subdaily
evapotranspiration rates from groundwater-level measurements, and that method now is
modified to estimate evapotranspiration rates from the baseflow diel signal only. The
method was successfully tested with hydro-meteorological data from the Hidegvíz Valley
experimental catchment in the Sopron Hills at the western border of Hungary. The
evapotranspiration rates calculated from the groundwater signal only, are typically
(a magnitude) higher than those obtained with an already existing method. With the
application of our new technique exploiting the baseflow diel signal of the stream,
evapotranspiration rates, very similar to those gained from groundwater level readings and
the Penman-Monteith equation, can be obtained.
Keywords: baseflow diel signal, evapotranspiration, riparian zone |
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