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


Hi Benson,

Thank you for your explanation.

As per the ARR2016 loss chapter, the most urban runoff comes from the DCIA; therefore, all runoff after the loss should be treated as surface runoff and go directly to the runoff at each node. Generally, the runoff from the indirectly connected area (after loss) is added to the pervious area before losses are taken out. Hence, what is the best way to assign losses to these three areas in RORB when obtaining a best-calculated hydrograph for an urban catchment?