Natural Isotopes and Ion Compositions Identify Changes in Groundwater Flows Affecting Wetland Vegetation in the Drentsche Aa Brook Valley, The Netherlands

• Autorzy: Elshehawi Samer , Bregman Enno , Schot Paul , Grootjans Ab

Identyfikatory

DOI

10.12911/22998993/99743

• Języki publikacji: EN

Abstrakty

EN

This study uses groundwater isotopes and ion composition to verify model simulations and ecohydrological studies in the Drentsche Aa nature reserve in The Netherlands, which is representative for the northwestern wetland areas in the Ice Marginal Landscape zone. At eight field sites, a total of 24 samples were analysed for their ¹³C, ¹⁴C, ²H, and ¹⁸O isotopes and ionic composition. The isotopes indicate that most of the fen peatlands in the area depend on the exfiltration of sub-regional groundwater flows, which confirmed the previous model simulations and ecohydrological studies. At three sites, isotopes and ionic composition indicate that the groundwater from the sub-regional system has been replaced by local infiltrated rainwater, due to nearby groundwater abstractions for drinking water, which influenced the success rates of the restoration measures. Furthermore, the evidence from chloride and ¹⁴C contents was found to indicate the presence of more saline groundwater, which are influenced by the groundwater flows near salt diapirs. Groundwater abstractions may enhance the upward flow of the saline groundwater to eventually exfiltrate at the wetlands, affecting the biodiversity of the nature reserve.

Słowa kluczowe

EN

ecohydrology; groundwater modelling; nature conservation; radiocarbon dating; groundwater abstraction

• Wydawca: Polskie Towarzystwo Inżynierii Ekologicznej ; Lublin University of Technology
• Czasopismo: Journal of Ecological Engineering
• Rocznik: 2019
• Tom: Vol. 20, nr 3
• Strony: 112--125
• Opis fizyczny: Bibliogr. 37 poz., rys., tab.

Twórcy

autor

Elshehawi Samer

• Centre for Energy and Environmental Studies, University of Groningen, The Netherlands
• Centre for Isotope Research, University of Groningen, The Netherlands

autor

Bregman Enno

• Province of Drenthe, The Netherlands
• Physical Geography Department, University of Utrecht, The Netherlands

autor

Schot Paul

• Copernicus Institute of Sustainable Development, University of Utrecht, The Netherlands

autor

Grootjans Ab

• Centre for Energy and Environmental Studies, University of Groningen, The Netherlands
• Institute of Water and Wetland Research, Radboud University Nijmegen, The Netherlands

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).