1. Assistant Professor, Water Resources Section, Civil Engineering and Geosciences, Delft Univ. of Technology, P.O. Box 5048, 2600GA Delft, Netherlands; and Postdoctoral Research Fellow, School of Geosciences, Univ. of Aberdeen, Aberdeen, AB24 3UF, UK; formerly, Faculty of Forestry, Univ. of British Columbia, Vancouver, V6T 1Z4, Canada (corresponding author).
2. Institut für Hydrologie, Universität Freiburg, 79098 Freiburg, Germany; formerly, Faculty of Forestry, Univ. of British Columbia, Vancouver, V6T 1Z4, Canada.