MONITORING AND MODEL CALIBRATION FOR THE SEWER NETWORK IN OSLO

Oslo's sewer system has developed over a period of 150 years. Up to the mid-fifties combined systems were mainly used. Subsequently an effort has been made to develop a separate system. The sewer system includes 2,200 km of sewers and 45,000 manholes. 800 km of sewers is combined. The main interceptors in the sewerage network consist of 300 km of pipes with dimensions of 600 mm and over. The sewer system is relieved by a total of 240 overflows, of which three are main overflows from the tunnel system.