Kick-off event of project MIA-CSO on 20 April 2010
Venue: Cast Collection of Ancient Sculpture, Berlin-Charlottenburg
During heavy storm events, a mixture of rainwater and wastewater, so-called combined water, is discharged from approx. 100 points of Berlin’s sewer system directly into the surface water. Despite numerous expensive retention measures which have either been implemented already or are still being planned, these discharges cannot be completely avoided and therefore impact the urban waters of Berlin. The conception and implementation of retention measures are a particular challenge for the water management, since combined sewers are subject to considerable variations in terms of both water quantity and water quality.
The main question is to find the generally accepted optimum between economic efforts for the management of combined sewers on the one hand and the ecologic and technical requirements on the other hand.
A project consortium involving KWB, Berliner Wasserbetriebe, the Senate Department of Health, Environment and Consumer Protection and Veolia, has started with a model-based investigation of this problem area. Over a period of two years, a large combined sewer situated in Berlin-Charlottenburg will continuously be monitored by several online sensors in terms of the different water quality parameters and flow quantities. Furthermore, additional sensors will be installed in the river directly below the discharge point, which will allow a better understanding of the biological impacts of combined sewer overflows in surface waters. The complete measurement program will substantially contribute to a differentiated assessment of the impact of CSO on water quality and is therefore an important basis for any further planning with regard to the management of combined sewers.
Impact of Combine sewer overflows for Berlin’s water management
Dr. Birgit Fritz-Taute/Matthias Rehfeld-Klein, Senatsverwaltung für Gesundheit, Umwelt und Verbraucherschutz
The challenge of combined water – Research activities performed by Berliner Wasserbetriebe
Regina Gnirß, Berliner Wasserbetriebe
Presentation of the integrated monitoring network
Kai Schroeder/Dr. Pascale Rouault, Kompetenzzentrum Wasser Berlin