Storm water management model. Version 4, Part B: EXTRAN addendum
Part B is a user's manual for EXTRAN, a flow routing manual that can be used both as a block of the SWMM package and as an independent model. The EXTRAN user's manual provides information for applying the model to compute backwater profiles in open channel and/or closed conduit systems experiencing unsteady flow. EXTRAN represent a drainage system as links and nodes, allowing simulation of parallel looped pipe networks; Weirs, orifices, and pumps; and system surcharges