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| Titel |
Natural vs. artificial groundwater recharge, quantification through inverse modeling |
| VerfasserIn |
H. Hashemi, R. Berndtsson, M. Kompani-Zare, M. Persson |
| 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 ; 17, no. 2 ; Nr. 17, no. 2 (2013-02-11), S.637-650 |
| Datensatznummer |
250017714
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| Publikation (Nr.) |
 copernicus.org/hess-17-637-2013.pdf |
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| Zusammenfassung |
| Estimating the change in groundwater recharge from an
introduced artificial recharge system is important in order to evaluate
future water availability. This paper presents an inverse modeling approach
to quantify the recharge contribution from both an ephemeral river channel
and an introduced artificial recharge system based on floodwater spreading
in arid Iran. The study used the MODFLOW-2000 to estimate recharge for both
steady- and unsteady-state conditions. The model was calibrated and verified
based on the observed hydraulic head in observation wells and model
precision, uncertainty, and model sensitivity were analyzed in all modeling
steps. The results showed that in a normal year without extreme events, the
floodwater spreading system is the main contributor to recharge with 80%
and the ephemeral river channel with 20% of total recharge in the studied
area. Uncertainty analysis revealed that the river channel recharge
estimation represents relatively more uncertainty in comparison to the
artificial recharge zones. The model is also less sensitive to the river
channel. The results show that by expanding the artificial recharge system,
the recharge volume can be increased even for small flood events, while the
recharge through the river channel increases only for major flood events. |
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