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#4456
Benson Liu
Moderator

Hi Ella,

By default, when using IFDs RORB will apply areal reduction factors (ARF) that will reduce the rainfall. This is done as per ARR guidelines (Book 2 Chapter 4). If you don’t want RORB to apply ARFs, you will need to check the box “Replace total catchment area with value of” and put in 0. This checkbox is towards the bottom of the ARR2016 window.

Kind regards,

Benson