Wagga Wagga Major Overland Flow Floodplain Risk Management Study and Plan
Once complete, the Wagga Wagga Major Overland Flow Floodplain Risk Management Study & Plan will contain flood mitigation options for overland flooding in Wagga Wagga.
Council will seek to implement the recommendations in the study and plan by applying for funding through the NSW Government’s Flood Risk Management Program.
What is overland flow flooding?
Overland flow flooding is caused by excess rainfall that leads to local runoff. It is different to riverine flooding, such as that from the Murrumbidgee River. However, elevated levels in the Murrumbidgee River can exacerbate overland flooding if the flood gates are shut at the same time as a significant localised rainfall event. This scenario occurred in December 2010 when water levels raised dramatically in the CBD after the flood gates were shut.
Where does overland flooding occur in Wagga Wagga?
Overland flooding due to local rainfall runoff occurs in several locations throughout the Wagga Wagga Local Government Area. The Wagga Wagga Major Overland Flow Floodplain Risk Management Study & Plan looks at overland catchments in East Wagga, North Wagga, Wagga Wagga City and Lake Albert (see map below). Overland flooding in villages will be subject to a separate study and plan.
Potential overland flow flood mitigation options are explained here.
You can help Council identify problem areas and solutions by completing the questionnaire below before Friday 20 July 2018.