What is a floodplain

The term floodplain refers to low lying land bordering a creek, river, lake, sea coast or artificial channel. In Victoria, floods are usually caused by heavy prolonged rainfall.

This produces surface runoff which flows overland into rivers and streams. When there is a large amount of runoff, water overflows the river banks onto the adjacent floodplain, causing land to flood.

Built up urban land can be affected by floods that occur during severe storms, when drainage systems reach capacity.

For planning purposes, a one per cent probability or one-in-100-year flood is used to identify land which is liable to flooding. This is determined from data obtained from previous floods and from flood studies.

CMA Blog

For all the current news from around the region. Sign up to the blog with your email so you don't miss a thing!

Click here for more

Get Involved

Become a volunteer with a Corangamite CMA community group

Click here for more

Works on Waterways

For further information works on waterways permits

Click here for more

Flood Advice

Need flood advice for a property in the Corangamite Region?

Click here for more

Barwon River Zonings 2018-19

Click here for the current list of 2018-19 zonings for the Barwon River

Click here for more

Corangamite Waterway Strategy

A new eight-year plan for healthy rivers, estuaries and wetlands.

Click here for more

Public Notices

Click here for more

Knowledge Base

The Corangamite CMA Knowledge Base is an extensive collection of publications and technical reports on all aspects of the catchment.

Click here for more

Connect with us


Follow us on Facebook, Twitter and YouTube

Flood Information

Click here for flood and weather information in the region.

Click here for more