C.4 Net mass
Net mass data fields are created and reported only for pollutants that are set to use the Shear1 pollutant export model. They have the following properties:
- Content:
- Reports the temporally and spatially varying net mass of a pollutant. It is initialised to zero at simulation commencement. A negative/positive number at a given location reflects net erosion/deposition, respectively
- Name:
- “
Net Mass <pollutant_name> ”, e.g. “Net Mass WQ_SED_FINES ”
- “
- Units:
These fields are reported at all TUFLOW HPC cells for all simulated constituents that are listed within pollutant export material blocks and use the Shear1 pollutant export model. Constant and timeseries pollutants are not reported because they are assigned only during boundary condition writing, rather than being simulated in the catchment domain. Dividing each pollutant’s Net Mass outputs by a user defined bulk density, and then again dividing by 10000 (i.e. m\(^2\)/ha) will compute the erosion or deposition depth of each pollutant as a function of space and time.