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Home Forums RORB – general use Apply direct and indirect impervious fractions

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    Hi everyone,

    I have a RORB model which contain “direct and indirect impervious fractions’ by turning on the functionality inside the GUI.

    I want to run this RORB model using Storminjectore. My question is how can I be sure that the correct loss values will be used for DCIA, ICIA and PA? Does the loss calculation in Storminjector consider adjustment of IL and CL as a result of “indirect impervious fraction”?



    Benson Liu


    This question was answered privately but I will post the answer here for other people to see.

    Storm Injector is not part of RORB and is created and maintained by others. Therefore, I can’t say for sure how Storm injector handles the loss calculations when dealing with indirect impervious fractions. My understanding is that Storm Injector uses the command line version of RORB. The command line version of RORB by itself is unable to handle the direct and indirect impervious fractions functionality that is available in normal RORB.

    Kind regards,


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