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| Titel |
Discovering complex groundwater dynamics of a multiple aquifer system on the base of stable and radio-isotope patterns |
| VerfasserIn |
Cornelia Wilske, Tino Rödiger, Axel Suckow, Stefan Geyer, Stephan Weise, Silke Merchel, Georg Rugel, Stefan Pavetich, Broder Merkel  , Christian Siebert |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250150690
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| Publikation (Nr.) |
 EGU/EGU2017-15175.pdf |
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| Zusammenfassung |
| The water supply in semi-arid Israel and Palestine, predominantly relies on groundwater as
freshwater resource, stressed by increasing demand and low recharge rates. Sustainable
management of such resources requires a sound understanding of its groundwater
migration through space and time, particularly in structurally complex multi-aquifer
systems as the Eastern Mountain Aquifer, affected by salting. To differentiate between
the flow paths of the different water bodies and their respective residence times, a
multi-tracer approach, combining age dating isotopes (36Cl/Cl; 3H) with rock specific
isotopes like 87Sr/86Sr and δ34S-SO4 was applied. As a result, the investigated
groundwaters from the two Cretaceous aquifers and their respective flow paths are
differentiable by e.g. their 87Sr/86Sr signatures, resembling the intensity of the
rock-water interaction and hence indirectly residence times. In the discharge areas
within the Jordan Valley and along the Dead Sea shore, δ34S-SO4 ratios reveal the
different sources of salinity (ascending brines, interstitial brines and dissolved salts).
Based on 36Cl and 3H and the atmospheric input functions, very heterogeneous
infiltration times and effective flow velocities, respectively, indicate an at least dual
porosity system, resulting in distinctly different regimes of matrix and pipe flow. |
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