How do I determine the size of a Netting TrashTrap® unit which will be required for a particular outfall?
A. The sizing of any of these versions requires knowledge of the peak flow volume (Q) anticipated, peak velocity (V) impacting the Netting TrashTrap® structure, and the concentration of trash and floatables in the CSO discharge. In most cases, for the peak Q and V, basic conveyance capacity of the pipes can be used for sizing without the need for modeling and monitoring. Trash and floatables content of the CSO can be estimated based on the monitoring data from systems we have already installed and from inspection of the drainage basin of the outfall. In all of the cases we have examined to date, the trash and floatables content of the CSO has not been the dominant sizing parameter.
