Linking baseflow separation and groundwater storage dynamics in an alpine basin (Dammagletscher, Switzerland)

This study aims at understanding interactions between stream and aquifer in a glacierized alpine catchment. We specifically focused on a glacier forefield, for which continuous measurements of stream water electrical conductivity, discharge and depth to the water table were available over 4 consecut...

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Bibliographic Details
Published in:Hydrology and earth system sciences 2015-08, Vol.19 (8), p.3681-3693
Main Authors: Kobierska, F, Jonas, T, Kirchner, J. W, Bernasconi, S. M
Format: Article
Language:English
Subjects:
Analysis
Aquifers
Electrical conductivity
Groundwater
Hydrogeology
Streamflow
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Summary:This study aims at understanding interactions between stream and aquifer in a glacierized alpine catchment. We specifically focused on a glacier forefield, for which continuous measurements of stream water electrical conductivity, discharge and depth to the water table were available over 4 consecutive years. Based on this data set, we developed a two-component mixing model in which the groundwater component was modelled using measured groundwater levels. The aquifer actively contributing to streamflow was assumed to be constituted of two linear storage units. Calibrating the model against measured total discharge yielded reliable sub-hourly estimates of discharge and insights into groundwater storage properties. Our conceptual model suggests that a near-surface aquifer with high hydraulic conductivity overlies a larger reservoir with longer response time.
ISSN:1607-7938
1027-5606
1607-7938
DOI:10.5194/hess-19-3681-2015