1. Ph.D. Candidate, Dept. of Hydraulic Engineering, Warsaw Univ. of Life Sciences—SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland (corresponding author).
2. Dept. of Geography, Univ. of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland; Dept. of Hydraulic Engineering, Warsaw Univ. of Life Sciences—SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland.
3. Professor, Dept. of Hydraulic Engineering, Warsaw Univ. of Life Sciences—SGGW, Nowoursynowska 159, 02-776, Warsaw, Poland.