What is the Probable Maximum Flood (PMF)?
The PMF is the largest flood that could conceivably occur. It is typically estimated from probable maximum precipitation coupled with the worst flood producing catchment conditions. While it is a rare and improbable occurrence, every property potentially affected by a PMF is considered to be on a floodplain and has some element of flood risk. Under the State Government's Floodplain Development Manual (2005), councils must consider the full range of risk when managing floodplains.