River Branches may lose water due to seepage and /or evaporation. If these processes are considered to be of importance they may be included in the model as a time series that specifies the losses. Flow loss is applied to the flow leaving the river node. To model flow loss through an entire river Branch, flow loss must be specified for all River nodes in that Branch. Both seepage and evaporation can be specified as a fraction of the actual flow (dimensionless), or as flux (volume per time).
To add a flow loss time series, enable ‘has flow loss’ and click on the
button and click on Browse... to select an existing flow loss time series or click on Create a new file… to open the Create a new dfs0 file dialogue.
If groundwater is defined in the Catchment where the River node is located, seepage loss is added to this groundwater storage. Seepage loss from a Catchment node, however, is added to the immediate downstream Catchment, if present. Otherwise, seepage flow is lost.
