Flow loss time series

Supply connections 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. 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’, click on the but­ton and click Browse... to include an existing flow loss time series or click Create a new file… to open the ‘Create a new file’ dialogue.

The user-specified water demand D of the connected user is automatically adjusted to take the loss into account. The adjusted water demand D* is cal­culated as follows:

This means that the Water user demands will still be fulfilled if sufficient water is available in the Reservoir. This also applies if the flow loss is given as a flux.

If groundwater is defined in the Catchment where the Reservoir is located the seepage loss from the connection is added to this groundwater.

Note that if the Reservoir is located on a Catchment node, seepage loss is added to the next downstream Catchment if a groundwater model is included for that Catchment.

Note that for Water users, flow loss time series in supply connections may also be specified in the dialoguedialog.