Conference Agenda

Certain application of urban drainage models require highly-performant models. Such applications include, inter alia, their use within Digital Twins and within real time control frameworks, in particular when model-based predictive control is envisaged. Also other modelling applications involving the evaluation of long time series and/or of a multitude of scenarios require highly performant models.

The paper presents the application of a procedure for automated sewer model transformation to a hydrological model for the rather complex sewer system of the city of Hannover, Germany, which is the third-longest sewer network in Germany. However, as is also the case in the Hannover system, the system contains significant parts subject to hydrodynamic effects such as surcharge and backwater effects, thus rendering the use of purely hydrological models infeasible. Therefore, as a second step of the simplification procedure, a hydrodynamic model for that part of the drainage system subject to significant hydrodynamic effects is combined, within the same model, with a hydrological model of the remaining parts of the network. As results are encouraging, the implementation of that model as a core element of a Digital Twin of the Hannover system is underway. The automated procedure is applicable also to other networks.