1% AEP modelling

1% Annual Exceedance Probability (AEP) means there is a 1% chance of a flood occurring, or being exceeded, in any one year. The 1% AEP is the Victorian Government standard to regulate and protect new developments through state planning and building systems.

Below you can see how the 1% AEP was developed for the Harcourt Flood Study in accordance with historical information such as newspaper accounts and recorded peak flood levels, physical conditions such as ground contour information and aerial photography, computer modelling and local knowledge gathered through extensive community consultation.