Section 3 Process descriptions

Previous chapters have presented an overview of the architecture and capabilities of TUFLOW CATCH. This chapter presents the details of the processes that TUFLOW CATCH executes. It does not present the processes executed by either TUFLOW HPC or TUFLOW FV: these are detailed in the respective model user and science manuals, and relevant release notes here:

• TUFLOW HPC
• TUFLOW FV

TUFLOW CATCH provides these primary functions:

• Coordination of the execution of TUFLOW HPC and TUFLOW FV across a whole-of-catchment domain (Hydrology and Integrated configurations)
• Automatic geolocation and writing of flow and concentration boundary conditions for TUFLOW FV (as the receiving water model), generated from TUFLOW HPC predictions (as the catchment model) (Hydrology and Integrated configurations)
• Pollutant export and transport calculations within a catchment (Pollutant Export and Integrated configurations)

The first of these is its core architectural capability and so is described in Section 2.3.1. The latter are technical componentry of this architecture and so are detailed here in Sections 3.1, 3.2 and 3.3, respectively.

3 Process descriptions

  3.1 Geolocation

  3.2 Pollutant export

    3.2.1 Constant

    3.2.2 Timeseries

    3.2.3 Material based export

      3.2.3.1 Accumulation and washoff

        3.2.3.1.1 Accumulation

        3.2.3.1.2 Washoff

      3.2.3.2 Shear stress

        3.2.3.2.1 Erosion

        3.2.3.2.2 Deposition

  3.3 Interventions

    3.3.1 Mass removal

      3.3.1.1 Equation

        3.3.1.1.1 Constant

        3.3.1.1.2 Other

      3.3.1.2 Table

  3.4 Non-hydrologic surface loads