Parameter estimation for urban runoff modelling

Accurate estimation of the control parameters for spatially distributed physically based catchment modelling systems requires considerable work to establish credibility. Presented in this paper is a methodology for estimation of control parameter values based on the application of a decision support system within a hydroinformatic system. The proposed methodology uses information contained within a GIS database together with optimisation techniques to infer spatially variable control parameters for utilisation with a catchment modelling system such as the Stormwater Management Model (SWMM). A case study application of the proposed methodology was undertaken using the Musgrave Avenue Stormwater System in Centennial Park, Sydney. Results from this application suggest that the proposed approach is capable of providing accurate spatially distributed control parameters for implementation with physically based catchment modelling systems.