Floodplain Management plans, flood studies and animations

The NSW Flood Risk Management Process has four stages – data collection, flood study, flood risk management study and flood risk management plan.

Flood Studies 

Lower Clarence Flood Study Update 2022

In September 2023 Council adopted an updated flood study review. The review used a finer modelling grid that previous models, incorporated the second Grafton Bridge, Pacific Motorway and West Yamba filling into the model and was validated against the January 2013, March 2021 and March 2022 flood events. The model has considered climate change with 2123 flood levels incorporating predicted increased rainfall and sea level rise under two Shared Socioeconomic Pathways (SSP) - SSP2 and SSP5. Council has adopted the SSP2 flood levels. Prior to adoption the flood model was independently peer reviewed.

 

 

Glenreagh Flood Study

In September 2013 Council adopted the Glenreagh Flood Study.

 
Floodplain Risk Management Plans

Grafton and Lower Clarence Floodplain Risk Management Plan

Council adopted the Grafton and Lower Clarence Floodplain Risk Management Plan (FRMP) in 2007, with a review of flood mitigation measures and management for Brushgrove considered by Council in 2013. The Grafton and Lower Clarence FRMP was updated to identify the revised flood management actions for Brushgrove.

In June 2023 Council resolved that, following adoption of the Lower Clarence Flood Study Update 2022, a consolidated Lower Clarence FRMP incorporating all the existing FRMPs be developed.

Alipou Creek Floodplain Risk Management Plan

The Alipou Creek Floodplain Risk Management Plan (FRMP) was adopted by Council in 2007.

In June 2023 Council resolved that, following adoption of the Lower Clarence Flood Study Update 2022, a consolidated Lower Clarence FRMP incorporating all the existing FRMPs be developed.

Iluka Floodplain Risk Management Plan

The Iluka Floodplain Risk Management Plan (FRMP) was adopted by Council in 2007.

In June 2023 Council resolved that, following adoption of the Lower Clarence Flood Study Update 2022, a consolidated Lower Clarence FRMP incorporating all the existing FRMPs be developed.

Yamba Floodplain Risk Management Plan

The Yamba Floodplain Risk Management Plan (FRMP) was adopted by Council in 2009.

In June 2023 Council resolved that, following adoption of the Lower Clarence Flood Study Update 2022, a consolidated Lower Clarence FRMP incorporating all the existing FRMPs be developed.

Wooli River Floodplain Risk Management Plan

The Wooli Floodplain Risk Management Plan (FRMP) was adopted by Council in 1999.

In September 2023 a draft updated Floodplain Risk Management Study and FRMP was placed on public exhibition.

Glenreagh Floodplain Risk Management Plan

In 2014 Council adopted the Glenreagh Floodplain Risk Management Plan.

 

Floodplain Modelling Animations

The below animations have been produced by BMT WBM Australia. Clarence Valley Council gives no warranty, express or implied, as to the currency, accuracy and/or completeness of any information contained in the animations. It is not possible to accurately predict exact future flood levels for any location.

The design flood levels shown have been derived using the computer simulated model for 1%, 2%, 5%, 0.2% or Extreme ARI (Average Recurrence Interval) flood events. A qualified consultant and/or surveyor should be engaged to assess the potential impact of the relevant design flood level against the relevant ground or floor levels for any particular property before making any decision to purchase, sell or do anything on, at or to that property.

Whole Catchment Animations

1% Flood Event 

 

2% Flood Event 

 

5% Flood Event 


0.2% Flood Event


 

Extreme Flood Event

 

Grafton Area Animations

1% Flood Event


2% Flood Event


5% Flood Event


0.2% Flood Event


Extreme Flood Event 


Yamba Area Animations

1% Flood Event 



2% Flood Event 


5% Flood Event 


0.2% Flood Event 

 

Extreme Flood Event 



2022 Flood event

Whole catchment


Ulmarra 


Yamba


  

 

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