How has flow regime changed in Snowy River (Vic)?
Change in Flow Regimes: The hydrology of the Snowy River is significantly changed due to its regulation in the upper reaches of the NSW portion of the catchment. Most of the Snowy Rivers yield is derived from the upper catchment and it has been estimated that 85% of the natural flow in the Snowy is generated above Key Gauge 222209, which is located near the State border downstream of the confluence of the the Suggan Buggan River and the Deddick River. It is estimated that the mean annual flow at this site has been reduced by 55% since the commencement of the Snowy Mountain Scheme. The streams in the Snowy SWMA are perennial, although a distinct seasonal flow pattern is apparent. Approximately 40% of the annual flow is generated in the spring as the snow melts high in the plains. The highest flow period extends from June to October, with 56% of the flow occurring during this time. February is the lowest flow month, with total flows representing approximately 3% of the average annual flo
