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| Titel |
A new approach to model the spatial and temporal variability of recharge to karst aquifers |
| VerfasserIn |
A. Hartmann, J. Lange, M. Weiler, Y. Arbel, N. Greenbaum |
| 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 ; 16, no. 7 ; Nr. 16, no. 7 (2012-07-20), S.2219-2231 |
| Datensatznummer |
250013375
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| Publikation (Nr.) |
 copernicus.org/hess-16-2219-2012.pdf |
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| Zusammenfassung |
| In karst systems, near-surface dissolution of carbonate rock results in a
high spatial and temporal variability of groundwater recharge. To adequately
represent the dominating recharge processes in hydrological models is still
a challenge, especially in data scarce regions. In this study, we developed a
recharge model that is based on a conceptual model of the epikarst. It
represents epikarst heterogeneity as a set of system property distributions
to produce not only a single recharge time series, but a variety of time
series representing the spatial recharge variability. We tested the new
model with a unique set of spatially distributed flow and tracer
observations in a karstic cave at Mt. Carmel, Israel. We transformed the
spatial variability into statistical variables and apply an iterative
calibration strategy in which more and more data was added to the
calibration. Thereby, we could show that the model is only able to produce
realistic results when the information about the spatial variability of the
observations was included into the model calibration. We could also show
that tracer information improves the model performance if data about the
spatial variability is not included. |
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