The end of 2021 saw higher than average rainfall across the Northern Murray-Darling Basin which produced the largest flows through the Darling River since 2012, with a peak of 73,000 ML/day at the Bourke gauge. Usually, the Warrego River flows into the Darling just south of Bourke. However, during this event water levels in the Darling got so high that water flowed over the banks of the Darling to the floodplains and riparian areas and also backed up into the Warrego channel!