TransWQ is basically an alpha-version (hardly even beta) of the Transport Block that simulates linked BOD-NOD-DO in Transport Block channel elements. It is part of SWMM4.4h, and documentation is included in the zip file: transwq.zip. You are welcome to try it.

However, travel times are so short in a sewer system and the flow is relatively well aerated, so that first-order decay of unlinked quality parameters (available in the Runoff and Transport Blocks) is probably sufficient.

Wayne Huber
wayne.huber@ORST.EDU