The water quality fluxes currently modelled in Source are the exchanges of water quality constituents between river reaches (i.e. links) and groundwater. The modelling approach allows for exchanges from the river to groundwater or from groundwater to the river. Details of the approach is available via Groundwater Analytical Tool - SRG.
For modelling storages the water mass balance equation includes a term for loss (seepage) to, or gain from, groundwater (see Storage node - SRG). When modelling water quality constituents, the constituent mass balance equation contains an equivalent term.
Within Source a number of different methods can be used to model the fluxes along a river reach. These can occur on a link - adding flows (Adding Flows SRG) or water demands (Water Demands SRG) - or be modelled by a node such as a Loss Node (Loss node - SRG).
This section describes the Fluxes along routing links. How these fluxes are modelled is described further in the chapter Link storage routing - SRG. Available methods include:
- Loss/Gains, which is described in the General purpose function section of the Link storage routing - SRG
- Timeseries Flux, which is described in the General purpose time series section of Link storage routing - SRG, and
- Groundwater, which is described in the Groundwater sections of Link storage routing - SRG and the Groundwater - SRG
Where constituents are modelled, parameters can be set for:
- Additional Inflow load,
- Groundwater, and
- Timeseries Flux
How constituents are routed through a link is described in Constituent Routing - SRG.