Local water quality settings.
User can set local water quality parameters and local initial condition of Water Quality in ICM rather than globally.
Local WQ parameter should at least contain decay rate, DO process coefficient etc..
As for the local initial condition, DO concentration and other pollutants concentration could be set for each river reach.
For example, for one node or one link it could have a local “decay” in itself. And for the initial condition every node or link can have different intial pollution concentrations.
A. Weisgerber commented
This functionnality would be useful for a WQ model containing different processes in different part of the network, for example river + estuary, where the upstream and downstream reaches behave quite differently.
One suggestion would be to create WQ zones, with each zone WQ settings overridding the default generic model-wide WQ settings.
Note: this is an issue for sediments as well, where sediment parameter for the upstream reaches might not be the same as those for lower/flatter/estuary reaches.