


Dual drainage modelling allows for an improved assessment of deficiencies in both systems, through integrated assessments which consider the interaction between the two systems. overland flow – roadways). Increasingly, these two systems are being modelled dynamically, using a linked approach known as dual drainage modelling. storm sewer only). Over the past two decades (+\-) there has been an increased focus on concurrent evaluation of the conveyance capacity of the major system (i.e. Early hydrologic/hydraulic numerical modelling efforts of urban drainage system performance focused on the minor system (i.e.
