Probable maximum flood is the new black

Probable Maximum Flood squared is the new black

Watch out for council requirements that stack improbable events on top of each other…

…other flood events, fires, heart attacks, meteorite strikes

We are seeing this more and more, in Land & Environment Court, and even SSDAs

(well, not meteorites)

If you get a whiff of this, you can push back.

Councils’ own guidance prevents this. You design to a flood event with a probability. Usually 1-100 year.

(Flood Risk Management Manual 2023)

Not a list of rare events piled on each other.