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| Titel |
Intensively exploited Mediterranean aquifers: resilience to seawater intrusion and proximity to critical thresholds |
| VerfasserIn |
K. Mazi, A. D. Koussis, G. Destouni |
| 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 ; 18, no. 5 ; Nr. 18, no. 5 (2014-05-08), S.1663-1677 |
| Datensatznummer |
250120350
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| Publikation (Nr.) |
 copernicus.org/hess-18-1663-2014.pdf |
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| Zusammenfassung |
| We investigate seawater intrusion in three prominent Mediterranean aquifers
that are subject to intensive exploitation and modified hydrologic regimes by
human activities: the Nile Delta, Israel Coastal and Cyprus Akrotiri
aquifers. Using a generalized analytical sharp interface model, we review the
salinization history and current status of these aquifers, and quantify their
resilience/vulnerability to current and future seawater intrusion forcings.
We identify two different critical limits of seawater intrusion under
groundwater exploitation and/or climatic stress: a limit of well
intrusion, at which intruded seawater reaches key locations of groundwater
pumping, and a tipping point of complete seawater intrusion
up to the prevailing groundwater divide of a coastal aquifer. Either limit
can be reached, and ultimately crossed, under intensive aquifer exploitation
and/or climate-driven change. We show that seawater intrusion vulnerability
for different aquifer cases can be directly compared in terms of normalized
intrusion performance curves. The site-specific assessments show
that (a) the intruding seawater currently seriously threatens the Nile Delta
aquifer, (b) in the Israel Coastal aquifer the sharp interface toe approaches
the well location and (c) the Cyprus Akrotiri aquifer is currently somewhat
less threatened by increased seawater intrusion. |
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