Affiliation: | Department of Geological Sciences, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5E2. (Phone, 306–966-5720;Fax, 306–966-8593;e-mail, .);National Hydrology Research Institute, II Innovation Blvd., Saskatoon, Saskatchewan, Canada S7N 3H5.;GSF-Institut für Hydrologie, Neuherberg, D-857564 Obser-schleissheim, Federal Republic of Germany. |