HYDRO requres a water surface initial condition at reservoirs. The Reservoir
IC view allows the user to specify default initial conditions. The default initial
condition is required, but will be overridden if a restart file is used.
The table pairs reservoir location with default initial values. Water
surface (stage) is currently the only valid variable that can be
initialized for a reservoir.
Name of reservoir where initial condition is to be
STAGEInitial water surface elevation.
- Include Block:
- Default initial values are replaced if a restart file is used.
- Currently, QUAL cannot take a spatially distributed default initial condition for
constituent concentrations. It has only a single scalar.
- Consistency should be maintained between initial reservoir-channel stage differences and flows at nodes.
If the reservoir is assigned a different initial stage than surrounding channels, the head difference implies
a flow described by the reservoir equations (see Reservoir View).
Unless you are very careful to balance the implied flow with other channel flows, the initial time step will have a mass imbalance.
If what you want is an easy initial condition, try making stage in the reservoir equal to the stage in all the surrounding channels and
making the initial flow zero. Alternatively, you can put up with the imbalance -- just run HYDRO for an hour or so extra before the start of any QUAL run you want do.