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Spatiotemporal scales of river-groundwater interaction - The role of local interaction processes and regional groundwater regimes

Epting, Jannis and Huggenberger, Peter and Radny, Dirk and Hammes, Frederik and Hollender, Juliane and Page, Rebecca M. and Weber, Stefanie and Banninger, Dominik and Auckenthaler, Adrian. (2018) Spatiotemporal scales of river-groundwater interaction - The role of local interaction processes and regional groundwater regimes. SCIENCE OF THE TOTAL ENVIRONMENT, 618. pp. 1224-1243.

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Official URL: https://edoc.unibas.ch/67395/

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Abstract

Drinking water production in the vicinity of rivers not only requires the consideration of different spatiotemporal scales and settings of river-groundwater interaction processes, but also of local and regional scale groundwater regimes.Selected case studies in combination with field-experiments and the setup of high-resolution groundwater flow models enabled the investigation of the spatiotemporal development of microbial (classical fecal indicator bacteria and total cell counts) and selected organic micropollutants in riverine and regional groundwater for different hydrological settings, including low and high flow conditions. Proxy indicators suitable as surrogates for the diverse contaminations in alluvial aquifers with different settings could be identified.Based on the study results, the basic elements for both groundwater management and river restoration concepts are derived, which include the: (1) compilation and evaluation of the "current state" concerning hydrogeology, microbiology and contamination by organic micropollutants, (2) definition of field-experiments to qualitatively assess variability related to the "current state", and (3) quantitative assessment of groundwater regimes, including variability of groundwater components and inflow areas, by application of high-resolution groundwater flow models.The validity and transferability of the concept and inferred controls (specifically drivers and controls of river-groundwater interaction) are tested by evaluations derived from hydraulic relationships to river sections with comparable settings and regional groundwater flow regimes in general.The results of our investigations illustrate the influence of dynamic hydrologic boundary conditions on river-groundwater interaction and of regional scale groundwater flow regimes on the water composition of riverine groundwater systems. It is demonstrated how to identify river sections and their variations with intensified river-groundwater exchange processes and how to quantify the transient character of the different groundwater components that constitute the raw water quality of drinking water wells near rivers. (c) 2017 Elsevier B.V. All rights reserved.
Faculties and Departments:05 Faculty of Science > Departement Umweltwissenschaften > Geowissenschaften > Applied Geology (Huggenberger)
UniBasel Contributors:Epting, Jannis and Huggenberger, Peter
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:ELSEVIER SCIENCE BV
ISSN:0048-9697
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:23 Apr 2020 16:05
Deposited On:23 Apr 2020 16:05

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