Characterisation of gypsum karst aquifers by heat and solute transport simulations

• Autorzy: Birk S. , Liedl R. , Sauter M.
• Języki publikacji: EN

Abstrakty

EN

Environmental risks in gypsum karst areas such as geomechanical problems as a result of gypsum dissolution or the vulnerability of the aquifers due to the unretarded transport of pollutants are mainly determined by the karst conduit system. Therefore, in order to provide a reliable basis for risk assessment, an adequate hydrogeological characterisation of the conduit system is required. A newly developed modelling tool is presented, which has been designed to support the characterisation of the conduit system of gypsum karst aquifers by simulating short-term fluctuations of solute concentrations and temperatures of the spring water. Both solute concentration and temperature of the spring water depend on the geometric and hydraulic properties of the conduit system. If only one of these parameters is analysed a unique identification of the structure of the conduit system may not always be obtained. Unsteadystate simulations of both heat and solute transport, however, show that different conduit systems, which are equivalent with respect to spring of one parameter, can be distinguished by taking into account a second parameter.

Słowa kluczowe

EN

conduit system; gypsum karst; heat transport; karst modelling; solute transport

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2002
• Tom: Vol. 52, nr 1
• Strony: 23--29
• Opis fizyczny: Bibliogr. 23 poz.

Twórcy

autor

Birk S.

• Center for Applied Geoscience (ZAG), University of Tubingen, Sigwartstr. 10, D-72076 Tubingen, Germany

autor

Liedl R.

• Center for Applied Geoscience (ZAG), University of Tubingen, Sigwartstr. 10, D-72076 Tubingen, Germany

autor

Sauter M.

• Institute of Geosciences, University of Jena, Burgweg 11, D-07749 Jena, Germany

Bibliografia

• 1. ASHTON , K. 1966. The analysis of flow data from karst drainage systems. Transactions of the Cave Research Group of Great Britain, 7, 161-203.
• 2. ATKINSON, T. C. 1977. Diffuse flow and conduit flow in limestone terrain in the Mendip Hills, Sommerset (Great Britain). Journal of Hydrology, 35, 93-110.
• 3. BEEK W. J. & MUTTZALL , K. M. K. 1975. Transport phenomena, 298 pp. Wiley; London.
• 4. BENDERITTER, Y., ROY, B. & TABBAGH , A. 1993. Flow characterization through heat transfer evidence in a carbonate fractured medium: first approach. Water Resources Research, 29, 3741-3747.
• 5. BIRK, S., LIEDL, R. & SAUTER, M. 2000. Characterization of gypsum aquifers using a coupled continuum-pipe flow model. In: F. S TAUFFER , W. KINZELBACH, K. KOVAR & E. HOEHN (Eds), Calibration and reliability in groundwater modelling, IAHS Publication, 265, 16-21.
• 6. BUNDSCHUH, J. 1997. Temporal variations of spring water temperatures in relation to the extents of the heat transport modes occurring in the karstified lower Gypsum-Keuper aquifer (Karnian, southern Germany). In: P.-Y. JEANNIN (Ed.), Proceedings of the 12 th International Congress of Speleology, 2, 129-133. La Chaux-de-Fonds.
• 7. CARSLAW, H. S. & JAEGER , J. C. 1959. Conduction of heat in solids, 510 pp. Clarendon Press; Oxford.
• 8. CLEMENS, T., HÜCKINGHAUS , D., SAUTER, M., LIEDL, R. & TEUTSCH, G. 1996. A combined continuum and discrete network reactive transport model for the simulation of karst development. In: K. KOVAR & P. VAN DER HEIJDE (Eds.), Calibration and reliability in groundwater modelling, IAHS Publication, 237, 309-318. Wallingford.
• 9. DREYBRODT, W. & BUHMANN , D. 1991. A mass transfer model for dissolution and precipitation of calcite from solutions in turbulent motion. Chemical Geology, 90 (1-2), 107-122.
• 10. FORD , D. C. & W ILLIAMS, P. W. 1989. Karst geomorphology and hydrology, 601 pp. Unwin; London.
• 11. GRASSO , D. A. 1998. Interprétation des réponses couplées hydrauliques et chimiques des sources karstiques. PhD thesis, University of Neuchâtel, 130 pp. Neuchâtel.
• 12. HÜCKINGHAUS, D. 1998. Simulation der Aquifergenese und des Wärmetransports in Karstaquiferen. Tübinger Geowissenschaftliche Arbeiten (TGA), C42, pp. 1-126.
• 13. HÜCKINGHAUS , D., L IEDL , R. & S AUTER , M. 1997. Characterization of karst aquifers by heat transfer. In: P.-Y. JEANNIN (Ed.), Proceedings of the 12th International Congress of Speleology, 2, 145-148. La Chaux-de-Fonds.
• 14. JAMES, A. N. & LUPTON , A. R. R. 1978. Gypsum and anhydrite in foundations of hydraulic structures. Geotechnique, 28, 249-272.
• 15. JESCHKE , A. A., VOSBECK, K. & D REYBRODT, W. 2001. Surface controlled dissolution rates of gypsum in aqueous solutions exhibit nonlinear dissolution kinetics. Geochimica et Cosmochimica Acta, 65 (1), 27-34.
• 16. KLIMCHOUK, A. & A NDREJCHUK, V. 1996. Environmental problems in gypsum karst terrains. International Journal of Speleology, 25 (3-4), 145-156.
• 17. KLIMCHOUK , A., F ORTI , P. & C OOPER, A. 1996. Gypsum karst of the world: a brief overview. International Journal of Speleology, 25 (3-4), 159-181.
• 18. LEBEDEV, A. L. & LEKHOV, A. V. 1990. Dissolution kinetics of natural gypsum in water at 5-25 °C. Geochemistry International, 27, 85-94.
• 19. LIU , Z. & DREYBRODT, W. 1997. Dissolution kinetics of calcium carbonate minerals in H2O-CO 2 solutions in turbulent flow; the role of the diffusion boundary layer and the slow reaction H2O + CO2 = H+ + HCO3-. Geochimica et Cosmochimica Acta, 61 (14), 2879-2889.
• 20. LIEDL, R., R ENNER , S. & SAUTER, M. 1998. Obtaining information about fracture geometry from heat flow data in karst systems. Bulletin d’Hydrogéologie, 16, 143-153.
• 21. RENNER , S. 1996. Wärmetransport in Einzelklüften und Kluftaquiferen - Untersuchungen und Modellrechnungen am Beispiel eines Karstaquifers. Tübinger Geowissenschaftliche Arbeiten (TGA), C30, 1-89.
• 22. SAUTER, M. 1992. Quantification and forecasting of regional groundwater flow and transport in a karst aquifer (Gallusquelle, Malm, SW-Germany). Tübinger Geowissenschaftliche Arbeiten (TGA), C13, 1-150.
• 23. VIERNEISEL , B. 2000. Lösungskinetik von Gips in durchströmten Röhren, 65 pp. Unpublished Diplom thesis, Geological Institute, University of Tübingen.