1. Norwegian Institute for Water Research, Gaustadalléen 21, 0349 Oslo, Norway
2. Ecohydrology
Group, Department of Earth and Environmental Sciences, University of Waterloo, 200 University Ave. W, Waterloo, Ontario N2L 3G1, Canada
3. ISTerre, University of Grenoble 1 and CNRS, P.O. Box 53, F 38041 Grenoble, France
4. Andra, National Radioactive Waste Management Agency, R&D Division, Transfer Migration Group, 1/7 rue Jean Monnet, 92298 Chatenay Malabry Cedex, France