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Flow Calibration in BASINS

Preliminary NPSM Parameter Settings Continued...

    Input Data Editor:
  • It is suggested that the first run of the NPSM include the parameter settings from the "Starter.def" file. Make sure that the project runs successfully, save the work, and then search HSPFParm database for a more representative project and its associated parameter values, if necessary.
  • The only set of parameters to look at initially can be found under "PWAT-PARM1" in the PWATER module of PERLND (see figure). Keep everything constant except "Interception Storage Capacity" and "Lower Zone ET", which should be expected to exhibit monthly changes (see figure).
  • Initially adjust only PERLND parameters.
    Output Manager:
  • Select RO under "Reaches" and "Hydr" (see figure). This parameter represents surface flow, similar to that measured by the USGS gages.
  • Plot "Steady State Variables" (see figure)to make sure you have reached dynamic equilibrium by the year in question (PERS, CEPS, SURS, UZS, IFWS, LZS, and AGWS).
  • Initially adjust only PERLND parameters.
    Run NPSM:
  • Don't forget to save the project if the model runs correctly. A sequence number in your project filename may help in keeping track of the number of runs with output for comparison in the output module.
  • Click Yes to view the output or No to return to the NPSM interface.
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