Environmental Earth Sciences

, Volume 74, Issue 12, pp 7685–7697 | Cite as

Stalactite drip-water monitoring and tracer tests approach to assess hydrogeologic behavior of karst vadose zone: case study of Han-sur-Lesse (Belgium)

  • Amaël PoulainEmail author
  • Gaëtan Rochez
  • Isabelle Bonniver
  • Vincent Hallet
Thematic Issue


This paper focuses on the unsaturated zone and epikarst of karst aquifers in order to identify the hydrogeological behavior of these important but poorly understood parts of karst systems. A high-resolution monitoring of stalactite drips and artificial tracer test experiment in the vadose zone allows to draw a conceptual model for the local recharge processes through the unsaturated zone of karst aquifers. Those aquifers represent major groundwater resources in Belgium. Seven years of high-resolution stalactite dripping were recorded on 3 sites of the Han-sur-Lesse cave system (South of Belgium). The three sites show very different discharge variations but a similar behavior from one year to another. Analysis and comparison of the dripping cycles over 7 years highlight the vadose zone behavior and its relationship with surface infiltration (water excess). For each site, a water excess threshold at the beginning of the winter has been identified. This threshold is needed to refill the vadose zone/epikarst capacity before the dripping. The value of the threshold is relatively constant for each site during the 7 years, indicating the regularity of the capacitive system of the vadose zone. Unknown features have also been observed with discharge decrease during high water excess periods, linked to the drainage processes of epikarst. Finally, artificial tracer test reveals the duality of the unsaturated zone behavior, with fast transmissive pathways (velocity of >6 m/h) related to a highly capacitive system (>150 days of tracer restitution).


Unsaturated zone Karst Vadose zone Epikarst Tracer test Stalactite drips 



This research was made possible by a grant of the Fond National de la Recherche ScientifiqueFNRS (Karst Aquifer ReseArch by Geophysics 2013–2017). We thank M. Vandiepenbeeck and S. Pinnock of the Royal Meteorological Institute (RMI) for the meteorological data. Thanks are also due to the Domaine des Grottes de Han for the access to the monitoring stations, and we are particularly grateful to G. Deflandre for the Père Noël cave station access. Finally, we gratefully acknowledge the constructive comments of the two anonymous reviewers who help to improve this manuscript.


  1. Allen RG, Pereira LS, Raes D, Smith M (1998) Crop evapotranspiration—guidelines for computing crop water requirements—FAO irrigation and drainage paper 56. FAO, RomeGoogle Scholar
  2. Arbel Y, Greenbaum N, Lange J, Inbar M (2010) Infiltration processes and flow rates in developed karst vadose zone using tracers in cave drips. Earth Surf Proc Land 35:1682–1693CrossRefGoogle Scholar
  3. Bakalowicz M (1995) The infiltration zone of karst aquifers. Investigation methods, structure and behavior. Hydrogéologie 4:3–21Google Scholar
  4. Bakalowicz M (2012) Epikarst. In: White W, Culver D (eds) Encyclopedia of Caves, 2nd edn. Academic press, San Diego, pp 284–288CrossRefGoogle Scholar
  5. Bakalowicz M (2013) Epikarst processes. In: Shroder J, Frumkin A (ed) Treatise on geomorphology, vol 6. Academic Press, San Diego, Karst Geomorphology, pp 164–171Google Scholar
  6. Bakalowicz M, Blavoux B, Mangin A (1974) Apport du traçage isotopique naturel à la connaissance du fonctionnement d’un système karstique. J Hydrol 23:141–158CrossRefGoogle Scholar
  7. Baker A, Brunsdon C (2003) Non-linearities in drip water hydrology: an example from Stump Cross Caverns, Yorkshire. J Hydrol 277:151–163CrossRefGoogle Scholar
  8. Blockmans S, Dumoulin V (2013) Houyet—Han-sur-Lesse 59/1-2. Carte géologique de Wallonie. In: Ministère de la Région Wallonne (ed) Service Public de Wallonie—Direction générale opérationnelle Agriculture, Ressources naturelles et Environnement, NamurGoogle Scholar
  9. Bonniver I (2011) Etude hydrogéologique et dimensionnement par modélisation du «système—traçage» du réseau karstique de Han-sur-Lesse (Massif de Boine—Belgique). Université de Namur, Thèse de doctorat en SciencesGoogle Scholar
  10. Bottrell SH, Atkinson TC (1992) Tracer study of flow and storage in the unsaturated zone of a karstic limestone aquifer. In: Höltz H, Werner A (eds) Tracer hydrology. Balkema, Rotterdam, pp 207–211Google Scholar
  11. Bultynck P, Dejonghe L (2001) Devonian lithostratigraphic units (Belgium). In: Bultynck P, Dejonghe L (eds), Guide to a revisited lithostratigraphic scale of Belgium, Geol Belg 4 (1–2), pp 39–69Google Scholar
  12. Ford D, Williams P (2007) Karst hydrogeology and geomorphology. Wiley, LondonCrossRefGoogle Scholar
  13. Genty D, Deflandre G (1998) Drip flow variation under a stalactite of the Père Noël cave (Belgium). Evidence of seasonal variation and air pressure constraints. J Hydrol 211:208–232CrossRefGoogle Scholar
  14. Gunn J (1977) A model of the drainage system of a polygonal karst depression in the Waitomo area, North Island, New Zealand. In: Proceedings 7th International Speleology Congress, Sheffield, Br Cave Research Association, pp 225–229Google Scholar
  15. Hartmann A, Goldscheider N, Wagener T, Lange J, Weiler M (2014) Karst water resources in a changing world: Review of hydrological modeling approaches. Rev Geophys 52(3):218–242CrossRefGoogle Scholar
  16. Jeannin PY, Groves C, Häuselaman P (2007) Speleological investigations. In: Goldscheider N, Drew D (eds) Methods in Karst Hydrogeology. Taylor and Francis, London, pp 25–44Google Scholar
  17. Jones WK, Culver D, Herman JS (2004) Epikarst. Special Publication 9. Karst Water Institute, Charles TownGoogle Scholar
  18. Klimchouk AB (2004) Towards defining, delimiting and classifying epikarst: Its origin, processes and variants of geomorphic evolution. In: Jones WK, Culver D, Herman JS (eds) Epikarst. Special Publication 9. Karst Water Institute, pp 23–35Google Scholar
  19. Kogovsek J (1997) Water tracing test in vadose zone. In: Kranjc YA (ed) Tracer Hydrology 97. Balkema, Rotterdam, pp 167–172Google Scholar
  20. Kogovsek J (2010) Characteristics of percolation through karst vadose zone. ZRC Publishing, Postojna-LjubljanaGoogle Scholar
  21. Kogovsek J, Petric M (2014) Solute transport processes in a karst vadose zone characterized by long-term tracer tests (the cave system of Postojska Jama, Slovenia). J Hydrol 519:1205–1213CrossRefGoogle Scholar
  22. Mangin A (1975) Contribution à l’étude hydrodynamique des aquifères karstiques. Doctorat ès Sciences naturelles, Université de Dijon. In: Ann. Spéléol 29 (3):283–332; (4):795–601; 30 (1):21–124Google Scholar
  23. Mangin A (1994) Karst hydrogeology. In: Gibert J, Danielopol DL, Stanford J (eds) Groundwater ecology. Academic Press, San Diego, pp 43–67CrossRefGoogle Scholar
  24. Markowska M, Baker A, Treble PC, Andersen MS, Hankin S, Jex CN, Tadros CV, Roach R (2015) Unsaturated zone hydrology and cave drip discharge water response: implications for speleothem paleoclimate record variability. J Hydrol. doi: 10.1016/j.jhydrol.2014.12.044 Google Scholar
  25. Quinif Y, Vandycke S (2001) Les phénomènes karstiques de la région de Han-sur-Lesse (Belgique). Bull Inf Bass Paris 38(1):6–19Google Scholar
  26. Rouch R (1968) Contribution à la connaissance des Harpacticides hypogés (Crustacés, Copépodes). Ann Spéléol 23(1):5–167Google Scholar
  27. Schnegg PA (2002) An inexpensive field fluorometer for hydrogeological tracer tests with three tracers and turbidity measurement. In: Bocanegra E, Martinez D, Massone H (eds) Groundwater and human development, pp 1484–1488Google Scholar
  28. Schudel B, Biaggi D, Dervey T, Kozel R, Müller I, Ross JH, Schindler U (2002) Application of artificial tracers in hydrogeology—Guideline. Rapp OFEG, Sér Géol 3Google Scholar
  29. Service Public de Wallonie, Direction Générale opérationnelle—agriculture ressources naturelles et développement (2014) Etat des nappes d’eau souterraines de la Wallonie, Mars 2014 (Treizième année). Direction de la coordination des données, Direction des Eaux SouterrainesGoogle Scholar
  30. Sheffer NA, Cohen M, Morin E, Grodek T, Gimburg A, Magal E, Gvirtzman H, Neid M, Isele D, Frumkin A (2011) Integrated cave drip monitoring for epikarst recharge estimation in a dry Mediterranean area, Sif Cave, Israel. Hydrol Process 25:2837–2845CrossRefGoogle Scholar
  31. Smart P, Friederich H (1987) Water movement and storage in the unsaturated zone of a maturely karstified carbonate aquifer, Mendip Hills, England. In: Proceeding of the environmental problems in karst terranes and their solutions conference, USA, pp 57–87Google Scholar
  32. Thornthwaite CW (1948) An approach toward a rational classification of climate. Geogr Rev 38(1):55–94CrossRefGoogle Scholar
  33. Van Rampelbergh M, Verheyden S, Allan M, Quinif Y, Keppens E, Claeys P (2014) Monitoring of a fast-growing speleothem site from the Han-sur-Lesse cave, Belgium, indicates equilibrium deposition of the seasonal δ18O and δ13C signals in the calcite. Clim Past 10:1871–1885CrossRefGoogle Scholar
  34. Verheyden S, Baele JM, Keppens E, Genty D, Cattani O, Hai C, Edwards L, Hucai Z, Van Strijdonck M, Quinif Y (2006) The Proserpine stalagmite (Han-sur-Lesse cave, Belgium): preliminary environmental interpretation o the last 1000 years as recorded in a layered speleothem. Geol Belg 9:245–256Google Scholar
  35. Verheyden S, Genty D, Deflandre G, Quinif Y, Keppens E (2008) Monitoring climatological, hydrological and geochemical parameters in the Pere Noel cave (Belgium): implications for the interpretation of speleothem isotopic and geochemical timeseries. Int J Speleol 37:221–234CrossRefGoogle Scholar
  36. Williams PW (1983) The role of the subcutaneous zone in karst hydrology. J Hydrol 61:45–67CrossRefGoogle Scholar
  37. Williams PW (2008) The role of epikarst in karst and cave hydrogeology: a review. Int J Speleol 37(1):1–10CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Amaël Poulain
    • 1
    Email author
  • Gaëtan Rochez
    • 1
  • Isabelle Bonniver
    • 1
  • Vincent Hallet
    • 1
  1. 1.Department of GeologyUniversity of NamurNamurBelgium

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