Modeling Siphon Weirs within EXTRAN

Abstract
This chapter presents the background for new code for simulating self-priming siphon-weirs within the Extended Transport (EXTRAN) module of the Stormwater Management Model, Version 4 (SWMM4). The new code handles unsteady flow conditions occurring in real sewer systems, and has been verified under a range of flow conditions, and found to produce good results for the conditions examined.
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