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.

This report was commissioned by DCCEEW to collate information and assess the impacts of the February/March 2022 floods.

Report and figures

The report outlines the relative rarity of the February/ March 2022 floods at key locations across 62 NSW disaster declared LGAs, the scale of flood impacts on public infrastructure, and identifies some of the known flood risk management and community awareness measures that may assist in management. This report was developed as part of the Joint Commonwealth/New South Wales Flood Recovery and Resilience Program funded under the Commonwealth Emergency Response Fund (ERF). The ERF program is managed nationally by the National Emergency Management Agency (NEMA) and the NSW Reconstruction Authority in New South Wales. Delivery of the project was led by the NSW Department of Climate Change, Energy, the Environment and Water (NSW DCCEEW).

Report and figures

Post-event Flood Behaviour Analysis for the Richmond River - February 2022 Event URBS Hydrology Model

Post-event review of the flooding that occurred in the Richmond River following the event in February 2022.

The NSW coast experienced flooding in February/March 2022 due to significant rainfall events. The aim of this report is to provide a snapshot of the intensity of flooding experienced across the coast of NSW based on the river and rainfall data collected within the 61 disaster declared LGAs. This flood summary report will assist with decision making for prioritisation and future investment for flood risk management.

Post-event Flood Behaviour Analysis for the Richmond River - February 2022 Event Hydraulic Model

Data Supplied and Generated for the 2022 Brunswick Post Flood Event Report