1. U.R.G.C. Hydrologie Urbaine, I.N.S.A. de Lyon, 69621 Villeurbanne Cedex, France
2. Inst. for Urban Water Management, Dresden Univ. of Technol., D-01602 Dresden, Germany
3. National Water Res. Inst., 867 Lakeshore Road, Burlington L7R 4A6, Ontario, Canada
4. EAWAG, Eng. Science Dep., Überlandstr. 133, CH-8600 Dübendorf, Switzerland
5. Dept. Hydraulic and Environ. Engng, NTNU, N-7491 Trondheim, Norway