Study models storms and sea rise

Computer modelling undertaken as part of the Woy Woy Peninsula Flood Study will include both design flood events and sea level rise.

DHI project engineer Ms Cath Acworth said that design flood events would include 1-in-10 year flood events, 1-in-20 year, 1-in-100 year and 1-in-200 year as well as the "probable maximum event".

Asked if the modelling would include intense storm events such as was recently experienced in Newcastle, Ms Acworth said that the Newcastle floods were due to a number of complicated factors, though the flooding was estimated to be a 1-in-200 year event.

Ms Acworth said that, in reference to climate change, increased water elevations in Brisbane Water due to sea level rise would also be incorporated into the computer modelling.

Lyle Stone, 23 Oct 2007