The complete utilization of the capacities of a complex sewage system, consisting of networks, storage and control assets, pressurized network and waste water treatment plants, especially for storm weather events is a central task to minimize the pollutant load discharged to receiving waters. With the objective of a minimization of water pollution load within the urban area of Berlin the project “Integrated Sewage Management” has been launched in 2000. The central points of this project are the application of integrated simulation tools for the examination of different management scenarios followed by the definition and installation of an integrated operation concept for the system. Special attention is turned to the combined sewage system where sewer overflows represent a potential risk for river pollution. Real time control of local regulators and thereby the activation of additional storage capacity within the network can lead to an optimization of the overall system. The paper is focusing on the methodology of model building to examine the sewage system and its operation management including geometric setup, measurement campaigns, calibration and validation. Moreover, the application of the model to evaluate the use of a mobile weir within the sewerage and its real time control is stated.

The European Water Framework Directive of 1991, which aim is to limit the discharge of urban rainwater, constrains the cities to improve their sewerage system in order to face such events. The combined sewer overflows are a very sensitive theme in Berlin because of the city’s drink water supply system. The Integrated Sewage Management project, materialized within the Berlin Water Competence Center, aims to optimize the network thanks to hydraulic and pollution modelling. The first step of this study is to model a pilot catchment’s area, thanks to the Hydroworks DM software. Beyond the network constitution, a measurement campaign is realized to calibrate the model, for hydraulic as well as for pollution processes. This has to be done for both dry and rain weather. A first calibration is made possible by the results of dry weather measurements. The analysis of rain weather measurements will allow the validation of the model to be done, and its transposition to the other Berlin catchment’s areas.