Recently, HARC have been working with Spatial Vision and Melbourne Water to produce a RORB plug-in for ArcGIS called ArcRORB.  The software allows ArcGIS users to draw a RORB catchment file and export it in the correct format within a GIS environment.  Similar to the MapInfo plug-in MiRORB, it is anticipated that this will improve efficiency and reduce errors when using GIS data to develop RORB models.  To try it out, you will need ArcGIS version 10.3 or later.  Just login to the Software page on our website  and download ArcRORB: it’s free!  Installation instructions and sample files are provided within the download package.