Section 9 Advection Dispersion

The TUFLOW AD Module is an add-on Module and extension of the TUFLOW hydrodynamic engines. By including passive transport fields for tracers, the advection, dispersion and fate of water quality constituents may be simulated. Examples of constituents include salinity, sediment and/or catchment inflow pollutant concentrations. Both dissolved and particulate constituents can be simulated. TUFLOW AD takes depth and velocity fields computed by the TUFLOW Classic or HPC solver and uses this information, together with initial and boundary conditions, to simulate the transport of the specified constituents. In particular, the effects of both longitudinal dispersion and transverse turbulent diffusion are included. TUFLOW AD is specifically oriented towards analyses of systems including coastal waters, estuaries, rivers, floodplains and urban areas. Up to twenty individual constituents can be simulated within TUFLOW AD. For models with linked 1D-2D domains, transport through 1D elements linked by SX connections is supported, but transport through 1D elements linked by HX connections are not.