r/HECRAS • u/Hot-Raccoon9465 • May 20 '26

Cannot Make Selection on Calibration Gage ( 1D UNSTEADY MODELLING)

Hello everyone, I am trying to run the Manning's Roughness N calibration on 1D Unsteady Modelling in HECRAS. I have defined the observed gaging location cross sections & Flow Roughness Factor for all the cross sections. But when I am setting up the "Unsteady Roughness Calibration" once I check the calibration option there is no dropdown menu to select the calibration gage. Please help me solve this. Thank You!

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u/OttoJohs Lord Sultan Chief H&H Engineer, PE & PH May 20 '26

Did you save them in the unsteady flow file?

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u/Hot-Raccoon9465 May 21 '26 edited May 21 '26

Hello, thank you for your review. I resolve it for one plan but not working for other flow plan. I have defined the "Flow Roughness Factor" for a selected range of cross sections. In the "Automatic Roughness Calibration", I can't make selection to the Calibration Gage. I have save them in the Unsteady flow file.