INPUT AND CHARACTERIZATION OF SEDIMENTS IN URBAN SEWER SYSTEMS

This paper discusses informative data on the particle size distribution in sewer sediments including data on the contamination of the individual fractions with micropollutants. For this purpose, two low-gradient sewer systems, a combined and a separate system, were sampled. This paper will show the differences between the two systems' sediments characteristics. Furthermore the sewer sediments will be compared to settleable solids introduced by street runoff into the sewer system and deposits found in a detention basin of the combined sewage. Finally, we will propose a simplified analysis method based on the observed data to describe the cohesivity of the sewer sediments.