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| Titel |
Subdaily evapotranspiration rate calculation from streamflow summer diurnal signal |
| VerfasserIn |
Zoltán Gribovszki, Péter Kalicz, József Szilágyi |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250053882
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| Zusammenfassung |
| In riparian shallow groundwater environment vegetation has a great influence on
water resources which manifests e.g. in diurnal signal of groundwater level and
groundwater-sustained stream baseflow. Recently a new technique was developed by us to
calculate daily or even subdaily groundwater evapotranspiration rates from groundwater-level
measurements, and that method now is modified to estimate groundwater evapotranspiration
rates (on a catchment scale) from the baseflow diurnal signal. The new method takes into
account diurnally change replenishment rate therefore gives higher ET values than former
estimations. Only basic geometric characteristics of the riparian zone (length, width)
and stream (width) are required for the calculations, without the need of any soil
hydraulics parameters. The new method was successfully tested with a dataset of
the Hidegvíz Valley experimental catchment, located in the Sopron Hills, at the
western border of Hungary, and also verified by a 2D numerical model experiments. |
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