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| Titel |
Anomalous scaling of transfer functions from precipitation to aquifer discharge in Southern Spain explained using a novel multicontinuum approach |
| VerfasserIn |
Anna Russian, Daniele Pedretti, Marco Dentz, Xavier Sanchez-Villa |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250086677
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| Publikation (Nr.) |
 EGU/EGU2014-586.pdf |
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| Zusammenfassung |
| One of the main processes in the basin-scale water cycle is the groundwater recharge from
precipitation and the discharge into a river or any outfall. Often, aquifer discharge and
precipitation measurements are the only information available when studying the
groundwater system of a basin, but this information may be enough to model regional flow,
disregarding the details at local scales. The discharge of a catchment is a measure for the
recharge at basin-scale, and variations in the discharge represent the dynamic response of an
aquifer to changes in recharge.
The ability to understand and model hydrological processes at basin scale is fundamental
to improve our ability to manage groundwater resources, predict the effect of large-scale
changes in land use and climate. The temporal scaling of discharge is quantified in frequency
domain by the transfer function TF, which is defined as the ratio between the spectra of
catchment response and recharge time series.
The transfer function may scale with frequency Ï as TF(Ï) ~ Ï-β. While the
classical linear and Dupuit catchment models predict exponents of β = 2 and β = 1,
observations indicate scalings with non integer exponents β. In specific, we analyse the
hydraulic behavior of fractured formation in Southern Spain, that in a few piezometer
display non integer exponent 1/2< β |
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