Journal cover Journal topic
Hydrology and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 5.153 IF 5.153
  • IF 5-year value: 5.460 IF 5-year
    5.460
  • CiteScore value: 7.8 CiteScore
    7.8
  • SNIP value: 1.623 SNIP 1.623
  • IPP value: 4.91 IPP 4.91
  • SJR value: 2.092 SJR 2.092
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 123 Scimago H
    index 123
  • h5-index value: 65 h5-index 65
Volume 13, issue 3
Hydrol. Earth Syst. Sci., 13, 285–292, 2009
https://doi.org/10.5194/hess-13-285-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.
Hydrol. Earth Syst. Sci., 13, 285–292, 2009
https://doi.org/10.5194/hess-13-285-2009
© Author(s) 2009. This work is distributed under
the Creative Commons Attribution 3.0 License.

  02 Mar 2009

02 Mar 2009

Mixing and transport of water in a karst catchment: a case study from precipitation via seepage to the spring

K. Schwarz1, J. A. C. Barth2, C. Postigo-Rebollo3, and P. Grathwohl1 K. Schwarz et al.
  • 1Eberhard Karls University of Tübingen, Center for Applied Geoscience, Sigwartstr. 10, 72076 Tübingen, Germany
  • 2Lehrstuhl für Angewandte Geologie, GeoZentrum Nordbayern der Friedrich-Alexander-Universität Erlangen-Nürnberg, Schloßgarten 5, 91054 Erlangen, Germany
  • 3Consejo Superior de Investigaciones Científicas, Jordi Girona 18–26, 08034 Barcelona, Spain

Abstract. One of the best-known and largest karst areas in Germany, the Blautopf Catchment, offers unique access to waters of the unsaturated zone through a large cave system. It was investigated with stable isotopes (18O/16O and D/H ratios expressed in permille = ‰) in precipitation, seepage- and groundwater as tracers for water flow, mixing, and storage. The precipitation showed a distinct seasonality with δ18O values between −2.9 and −24.6‰ during summer and winter, respectively. However, the isotope signals in seepage water in the caves as well as the discharge were almost completely buffered and ranged around an average δ18O value of −10‰. This value was also close to the long-term average value of local precipitation, −9.3‰. The homogeneous isotopic composition of the Blautopf Spring was unexpected, as its highly variable discharge (0.3 to 32 m3 s−1) is typical for a fast responsive karst system. These isotopic similarities could be explained by nearly complete mixing of the water already in the vadose zone. The data set therefore presents a case study to narrow down zones of mixing in karst catchments. It also confirms the minor role of the fast conduit system in the water balance of the Blautopf Catchment.

Publications Copernicus
Download
Citation