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Abstract
Today's standardized computer models for simulating flow through in-ground sustainable urban drainage systems (SUDS) require substantial monitoring data in order to allow for a realistic representation of system behaviour, as they are based on predefined or user-specific head-discharge relationships. Darcy's law in combination with the finite volume method was applied to compute the flow through filter material and validated against monitored data. The finite volume Darcy's flow (FVD) model is based on physical characteristics, which represents flow through gravel material. Flow characteristics are dependent on the dimensions and materials used and an excellent model fit was achieved when compared with monitoring data.