Université de Neuchâtel

Introduction to karst modelling

Király, László ; Jeannin, Pierre-Yves ; Sauter, Martin

In: Bulletin du Centre d'hydrogéologie, 1998, vol. 16, p. 1-6

Université de Neuchâtel

A quantitative method for the characterisation of karst aquifers based on spring hydrograph analysis

Kovács, Attila ; Perrochet, Pierre ; Király, László ; Jeannin, Pierre-Yves

In: Journal of Hydrology, 2005, vol. 303, no. 1-4, p. 152-164

This paper presents a method for characterizing flow systems in karst aquifers by acquiring quantitative information about the geometric and hydraulic aquifer parameters from spring hydrograph analysis. Numerical sensitivity analyses identified two fundamentally different flow domains, depending on the overall configuration of aquifer parameters. These two domains have been quantitatively...

Université de Fribourg

Identification of glacial meltwater runoff in a karstic environment and its implication for present and future water availability

Finger, D. ; Hugentobler, A. ; Huss, Matthias ; Voinesco, A. ; Wernli, Heini ; Fischer, D. ; Weber, E. ; Jeannin, Pierre-Yves ; Kauzlaric, M. ; Wirz, A. ; Vennemann, T. ; Hüsler, F. ; Schädler, B. ; Weingartner, R.

In: Hydrol. Earth Syst. Sci., 2013, vol. 17, no. 8, p. 3261–3277

Glaciers all over the world are expected to continue to retreat due to the global warming throughout the 21st century. Consequently, future seasonal water availability might become scarce once glacier areas have declined below a certain threshold affecting future water management strategies. Particular attention should be paid to glaciers located in a karstic environment, as parts of the...

Université de Neuchâtel

Water vulnerability assessment in karst environments: a new method of defining protection areas using a multi-attribute approach and GIS tools (EPIK method)

Doerfliger, N. ; Jeannin, Pierre-Yves ; Zwahlen, François

In: Environmental Geology, 1999, vol. 39, no. 2, p. 165-176

Groundwater resources from karst aquifers play a major role in the water supply in karst areas in the world, such as in Switzerland. Defining groundwater protection zones in karst environment is frequently not founded on a solid hydrogeological basis. Protection zones are often inadequate and as a result they may be ineffective. In order to improve this situation, the Federal Office for...

Université de Neuchâtel

Vulnerability assessment in karstic areas: validation by field experiments

Perrin, J. ; Pochon, Alain ; Jeannin, Pierre-Yves ; Zwahlen, François

In: Environmental Geology, 2004, vol. 46, no. 2, p. 237-245

Several methods have been developed for vulnerability mapping in karstic areas. These methods need additional validation by field experiments. Several tests have been carried out in the Swiss Jura with natural and artificial tracers. The protective role of some intrinsic properties of the system, such as glacial deposits covering karst, epikarst storage and system dilution effect, have been...

Université de Neuchâtel

Implications of the spatial variability of infiltration-water chemistry for the investigation of a karst aquifer: a field study at Milandre test site, Swiss Jura

Perrin, J. ; Jeannin, Pierre-Yves ; Zwahlen, François

In: Hydrogeology Journal, 2003, vol. 11, no. 6, p. 673-686

The Milandre test site is an ideal karstic aquifer for studying the spatial heterogeneity of groundwater chemistry. Numerous observation points can be sampled: the spring, the underground river and its tributaries, and boreholes at different depths. The main causes of the spatial variability of the chemical parameters are: nature and localisation of the input, the structure of the infiltration...

Université de Fribourg

Glacier advances during the last 400 ka as evidenced in St. Beatus Caves (BE, Switzerland)

Häuselmann, Philipp ; Lauritzen, Stein-Erik ; Jeannin, Pierre-Yves ; Monbaron, Michel

In: Quaternary International, 2008, vol. 189, no. 1, p. 173-189

While stalagmites within caves are commonly used to obtain information about past climate change, little attention has so far been given to the cave, its morphology, and many other types of deposits contained in it. The discontinuous nature of cave sediments and the possibility that caves are re-shaped by more recent water circulations has discouraged many researchers, despite the fact that it is...

Université de Fribourg

Cave and Karst evolution in the Alps and their relation to paleoclimate and paleotopography

Audra, Philippe ; Bini, Alfredo ; Gabrovšek, Franci ; Häuselmann, Philipp ; Hobléa, Fabien ; Jeannin, Pierre-Yves ; Kunaver, Jurij ; Monbaron, Michel ; Šušteršic, France ; Tognini, Paola ; Trimmel, Hubert ; Wildberger, Andres

In: Acta Carsologica, 2007, vol. 36, no. 1, p. 53-68

Progress in the understanding of cave genesis processes, as well as the intensive research carried out in the Alps during the last decades, permit to summarize the latest knowledge about Alpine caves. The phreatic parts of cave systems develop close to the karst water table, which depends on the spring position, which in turn is generally related to the valley bottom. Thus, caves are directly...

Université de Neuchâtel

The role of tributary mixing in chemical variations at a karst spring, Milandre, Switzerland

Perrin, J. ; Jeannin, Pierre-Yves ; Cornaton, Fabien

In: Journal of Hydrology, 2007, vol. 332, no. 1-2, p. 158-173

Solute concentration variations during flood events were investigated in a karst aquifer of the Swiss Jura. Observations were made at the spring, and at the three main subterraneous tributaries feeding the spring. A simple transient flow and transport numerical model was able to reproduce chemographs and hydrographs observed at the spring, as a result of a mixing of the concentration and...

Université de Neuchâtel

L’eau, sculptrice sur pierre

Huber, Nicolas ; Jeannin, Pierre-Yves

In: L'Express et L'Impartial, 2004, vol. 25.08, p. 3

Non, l’intérêt géologique du canton de Neuchâtel ne se limite pas au Creux-du-Van ! Nouvelle preuve avec le quatrième volet de nos cinq découvertes aux côtés d’un spécialiste. Aujourd’hui, sur les traces de l’eau avec l’hydrogéologue Pierre-Yves Jeannin, directeur de l’Institut suisse de spéléologie et de karstologie (Isska).