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Numerical long-term assessment of managed aquifer recharge from a reservoir into a karst aquifer in Jordan

Xanke, Julian ; Jourde, Hervé ; Liesch, Tanja ; Goldscheider, Nico

Journal of hydrology (Amsterdam), 2016-09, Vol.540, p.603-614 [Periódico revisado por pares]

Elsevier B.V

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  • Título:
    Numerical long-term assessment of managed aquifer recharge from a reservoir into a karst aquifer in Jordan
  • Autor: Xanke, Julian ; Jourde, Hervé ; Liesch, Tanja ; Goldscheider, Nico
  • Assuntos: Aquifers ; Depletion ; Earth Sciences ; Freshwater supply ; Groundwater levels ; Hydraulic anisotropy ; Hydrology ; Integrated water resources management (IWRM) ; Karst ; Karst aquifer ; Managed aquifer recharge (MAR) ; Mathematical models ; Numerical modeling ; Recharging ; Reservoirs ; Sciences of the Universe ; Water tables
  • É parte de: Journal of hydrology (Amsterdam), 2016-09, Vol.540, p.603-614
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: •Managed aquifer recharge into a karst aquifer underneath a reservoir.•Numerical approach adapted to karst aquifer hydraulics.•Prediction of lowering groundwater table due to reservoir sedimentation. In semi-arid regions with high seasonal variability of water availability, adaptive management strategies and technical measures are required to ensure the sustainable use of water resources. In this study, managed recharge of storm water into a karst aquifer and the water level fluctuations related to pumping in a nearby wellfield were simulated at Wadi Wala, Jordan. We used a numerical equivalent porous medium (EPM) approach with specific adaptations to account for the heterogeneity and anisotropy of the karst aquifer. The model domain was vertically projected along the wadi course, resulting in a 2-dimensional model, and subdivided into hydraulic zones representing the karst-specific flow pattern of fast flow and slow depletion. Results show satisfying agreement of measured and simulated groundwater tables from 2002 to 2012 and predict a lowering of the average groundwater table until 2022 of around 2.7m in the immediate surroundings of the reservoir and an increased depletion towards the wellfield, mainly caused by sedimentation in the reservoir and an associated decrease in infiltration. Abstraction at the wellfield changed considerably over the regarded time period and strongly influences the groundwater fluctuations, which shows the need of improved pumping management and monitoring. The results can serve as a basis for decision makers regarding an optimization of water management at the reservoir and wellfield. Furthermore, the presented numerical approach can be transferred to karst regions with similar physio-geographical conditions to assess managed aquifer recharge.
  • Editor: Elsevier B.V
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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