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Maloszewski, P. ; Rauert, W. ; Trimborn, P. ; Herrmann, A.* ; Rau, R.*

Isotope hydrological study of mean transit times in an alpine basin (Wimbachtal, Germany).

J. Hydrol. 140, 343-360 (1992)
DOI
Open Access Green as soon as Postprint is submitted to ZB.
Measurements of tritium and 18O concentrations in precipitation and runoff were used to provide further insight into the groundwater storage properties of the Wimbachtal Valley, a catchment area of 33.4 km2, extending between 636 and 2713 m a.s.l. in the Berchtesgaden Alps. The catchment includes three aquifer types: a dominant porous aquifer; a fractured dolomite; a karstic limestone aquifer. Employing a simple hydrological model, information about mean transit times of environmental tracers is derived for the groundwater runoff component and several karst springs from the application of the exponential and dispersion flow models to the isotopic input and output data. The mean transit times calculated from a dispersion model with transit times of 4.1 years for 18O and 4.2 years for tritium, which agree well, allow calculation of total (mobile + stagnant) groundwater storage volume, which is equivalent to 6.6 m of water depth. Direct runoff appears negligible as in many other cases.
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Publication type Article: Journal article
Document type Scientific Article
ISSN (print) / ISBN 0022-1694
e-ISSN 1879-2707
Journal Journal of Hydrology
Quellenangaben Volume: 140, Issue: 1-4, Pages: 343-360 Article Number: , Supplement: ,
Publisher Elsevier
Reviewing status Peer reviewed
Institute(s) Institute of Groundwater Ecology (IGOE)