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Reservoir Initial Condition

Overview

HYDRO requires 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.

Tables

Example

# Description:
# Initial Condition of Clifton Court Forebay
RESERVOIR_IC
RES_NAME STAGE
clifton_court 5.000
END

The RESERVOIR_IC table specifies initial water surface elevations for reservoirs.

Field Descriptions

  • RES_NAME: Name of the reservoir where the initial condition is to be applied.
  • STAGE: Initial water surface elevation.

Table Info

  • Identifier: NAME
  • Include Block: INITIAL_CONDITION

Default initial values are replaced if a restart file is used. 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. Unless carefully balanced, the initial time step may have a mass imbalance. To avoid this, set the reservoir stage equal to surrounding channels and make the initial flow zero.