The Post 2022 Event Flood Behaviour Analysis - Brunswick River aims to understand the areas impacted by the recent 2022 flood event and determin the current approved flood model's ability to replicate the 2022 event.

The study area includes the townships of Mullumbimby, Brunswick Heads, Ocean Shores, and villages of New Brighton, South Golden Beach and Billinudgel. The study area covers an area of approximately 230 square kilometres, and includes diverse environments, generally comprising of dense vegetation in the hinterlands and coastal villages to the east of the catchment.

The Post 2022 Event Flood Behaviour Analysis of the Brunswick River involved a review of the hydrological and hydraulic models, and IFD estimates. Flood Frequency Analysis and Regional Flood Frequency Estimation methods were undertaken to assess the model perfomance.

A damage assessment was undertaken to determine the cost of damage and the degree of disruption to the community caused duing flooding event.