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Add Supplemental Wells

Wells that provide a supplemental supply do not need to be represented by a specific structure on the river network, rather they can be tied to a co-mingled direct diversion structure using appropriate flags in the input files.

  1. Open the response (*.rsp) file in a text editor and include the files specific for well operations.
    • Well_Station (*.wes)
    • Well_Right (*.wer)
    • Well_Demand_Monthly (*.wem)
  2. Open the control (*.ctl) file in a text editor and set the iwell parameter to 1 to indicate that wells will be included in the scenario and set the icondem parameter to 1 to designate the historical demand approach.
  3. Open the network (*.net) in StateDMI, right click on the structure(s) to receive supplemental ground water supplies, and revise the structure type from D for diversion only structure to DW diversion. This indicates to the model which co-mingled structures will be provided well information.
  4. Create a well station (*.wes) file using the StateDMI commands:
    • Read in DW structures from the network diagram.
    • Set the total well capacity in CFS.
    • Set the well system efficiency (annual or monthly efficiency values).
    • Set the demand and use types (see Section 4 for more discussion).
    • Set the idvcow2 parameter to be the co-mingled structure ID; StateMod considers it to be a ground water only structure if this parameter is left as N/A.
    • Set the depletion and return flow locations and patterns; must reference the delay patterns provided in the delay file (*.dly or *.urm).
    • Depletion and accretion locations and patterns are typically the same, unless a portion of non-consumed water returns more quickly via overland flow.
  5. Create a well right (*.wer) file using the StateDMI commands:
    • Use HydroBase to pull well rights for each well or set each well water right; in both situations, tie each water right to the co-mingled structure ID.
    • Set the water right priority (administration number) and amount in CFS.
    • Review options to determine if a “turn-on” date is appropriate; note that a “turn-off” date has not been implemented and once a well is turned on, it is available to pump for the remainder of the model period.
  6. Create the well demand file (*.wem) using the TSTool commands.
    • The well demand (*.wem) file reflects the co-mingled supplemental supply, and is indicated in this file under the co-mingled structure ID.
    • Set the monthly demand or read in an external StateMod formatted file (*.stm) with the demand.
    • The well demand file only reflects the demand on ground water supplies, and when using the historical pumping approach, cannot be met from surface water.
    • For irrigation structures, the well demand (*.wem) file generally reflects estimated pumping output from StateCU for each co-mingled structure. These pumping estimates are generally used for the historical well pumping (*.weh) file for baseflow calculations as well as simulation scenarios.
  7. Simulate the model.
  8. Review the direct diversion summary output file (*.xdd) , structure summary output file (*.xss), and the well summary (*.xwe) file for output information on the well structures.