A Flood Study constitutes the first stage of the NSW floodplain risk management process. WMAwater completed a Flood Study for the areas including and adjacent to Marrickville (including parts of or all of the suburbs of Petersham, Stanmore, Enmore, Newtown, St Peters, Tempe, Marrickville and Dulwich Hill). The study was prepared for Marrickville Council under the guidance of NSW Government staff and Council’s Floodplain Risk Management Committee (FMC). The study involves the development of models and the quantification of the existing flood risk, and provides the basis for the future management of flood liable lands within the study area.
The goals of the study were:
- Define design flood behavior for a range of events from 2Y ARI to the PMF; and
- Produce a modeling system that will be suitable for analysing floodplain management measures in subsequent stages of the Floodplain Risk Management Program.
The work concluded that there is an extensive flood liability throughout the lower areas of the study area as a result of extensive development in conjunction with the transformation of pervious surfaces to impervious (paved) surfaces. Based on our review of available rainfall and flood records Marrickville has not experienced a major flood event for a long period of time, probably since the mid 1970’s. The largest event in the last 50 years appears to have occurred in 1966. Future events will alert the population of Marrickville to their flood liability, particularly those residents in some of the most flood liable land near Sydenham Road, Malakoff Street and those businesses within the Marrickville Industrial Area.