Institute of Urban Water Management and Environmental Engineering, Department of Civil and Environmental Engineering, Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany
Dr. Manfred Lübken
Institute of Urban Water Management and Environmental Engineering, Department of Civil and Environmental Engineering, Ruhr-Universität Bochum, Universitätsstr. 150, 44801 Bochum, Germany