RORBwin is a free and open-source interactive runoff and streamflow routing platform used to calculate catchment losses and flood hydrographs from rainfall and other channel inputs.

RORB has been widely used by Australian hydrologists for many years (the first version was released in 1975). The core runoff-routing concepts in RORB have withstood the test of time but recent versions are thoroughly modern and can implement the procedures from Australian Rainfall and Runoff 2019 including the use of pre-burst rainfall and Monte Carlo sampling of temporal patterns and initial loss.

This webinar introduces RORB, describes its capabilities, input data requirements, and options for conducting simple runs, ensemble runs with multiple rainfall temporal patterns, and Monte Carlo sampling of a range of inputs.


Tony Ladson


Tony Ladson has 35 years' experience in hydrology and river management and has worked on projects throughout Australia and in the US, Taiwan and PNG. He has a PhD from the University of Melbourne and ... Read more

Matt Scorah


Matt has over five years of experience in hydrology and water resources modelling. Since graduating from the University of Melbourne in 2013, Matt has been heavily involved in the ongoing development ... Read more

Krey Price

International Water Training Institute

Educated at the University of California at Berkeley, Krey is a civil engineer and project manager with international experience in water resources. He is engaged in computational modelling, engineeri... Read more

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