3.4 Non-hydrologic surface loads

TUFLOW CATCH supports simulation of the introduction of non-hydrologic (i.e. independent of rainfall) surface flows and loads to the catchment domain. This feature might be used, for example, to simulate the discharge of sewage treatment plants, groundwater exfiltration or other non-hydrologic processes. This simulation is spatially explicit: flows and pollutants are introduced where they actually occur on ground rather than be distributed across a lumped computational subcatchment. Simulation is affected through construction of point, line or region GIS features (using the standard TUFLOW 2d_sa_ empty GIS layer), and linking associated feature names with entries in the TUFLOW database csv file. These entries then point to flow and concentration timeseries data.

The relevant TUFLOW CATCH commands are described in Section 4.5.3.6.