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Fresh Water Lens Persistence and Root Zone Salinization Hazard Under Temperate Climate

Author

Listed:
  • Sija F. Stofberg

    (Wageningen University)

  • Gualbert H. P. Oude Essink

    (Deltares
    University of Utrecht)

  • Pieter S. Pauw

    (Wageningen University
    Deltares)

  • Perry G. B. Louw

    (Deltares)

  • Anton Leijnse

    (Wageningen University)

  • Sjoerd E. A. T. M. Zee

    (Wageningen University
    Monash University)

Abstract

In low lying deltaic areas in temperate climates, groundwater can be brackish to saline at shallow depth, even with a yearly rainfall excess. For primary production in horticulture, agriculture, and terrestrial nature areas, the fresh water availability may be restricted to so-called fresh water lenses: relatively thin pockets of fresh groundwater floating on top of saline groundwater. The persistence of such fresh water lenses, as well as the quantity and quality of surface water is expected to be under pressure due to climate change, as summer droughts may intensify in North-West Europe. Better understanding through modelling of these fresh water resources may help anticipate the impact of salinity on primary production. We use a simple model to determine in which circumstances fresh water lenses may disappear during summer droughts, as that could give rise to enhanced root zone salinity. With a more involved combination of expert judgement and numerical simulations, it is possible to give an appraisal of the hazard that fresh water lenses disappear for the Dutch coastal regions. For such situations, we derive an analytical tool for anticipating the resulting salinization of the root zone, which agrees well with numerical simulations. The provided tools give a basis to quantify which lenses are in hazard of disappearing periodically, as well as an impression in which coastal areas this hazard is largest. Accordingly, these results and the followed procedure may assist water management decisions and prioritization strategies leading to a secure/robust fresh water supply on a national to regional scale.

Suggested Citation

  • Sija F. Stofberg & Gualbert H. P. Oude Essink & Pieter S. Pauw & Perry G. B. Louw & Anton Leijnse & Sjoerd E. A. T. M. Zee, 2017. "Fresh Water Lens Persistence and Root Zone Salinization Hazard Under Temperate Climate," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 31(2), pages 689-702, January.
    • Handle: RePEc:spr:waterr:v:31:y:2017:i:2:d:10.1007_s11269-016-1315-9
    DOI: 10.1007/s11269-016-1315-9
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    Cited by:

    1. Tang, Darrell W.S. & Bartholomeus, Ruud P. & Ritsema, Coen J., 2024. "Wastewater irrigation beneath the water table: analytical model of crop contamination risks," Agricultural Water Management, Elsevier, vol. 298(C).
    2. Degen Lin & Chuanqi Hu & Fang Lian & Jing’ai Wang & Xingli Gu & Yingxian Yu, 2023. "Risk Assessment of World Corn Salinization Hazard Factors Based on EPIC Model and Information Diffusion," Land, MDPI, vol. 12(11), pages 1-19, November.

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