Coastal flood hazard maps

​​​​​Coastal flood modelling

Coastal flood modelling predicts the likelihood of floods on coasts, using probabilities and the movement of water in specific areas. 

Coastal flooding occurs when dry land is flooded with seawater due to overtopping, extreme high tides, breaching of coastal defences and wave processes. 

With sea level rise instances of coastal flooding will increase in frequency.

Saltwater is more corrosive than freshwater and is much more damaging to properties and critical infrastructure.​

Areas that could be affected by coastal flooding include:

• people (in terms of reduced resilience to coastal flood events, mental health impacts and even loss of life) 
  
• property including historic buildings and structures 
• transport routes 
• critical infrastructure assets 
  
• environment​
  

We have completed coastal flood modelling as part of our Shoreline Management Plan (SMP) which assesses the flood and erosion risk for our coast and sets out how this risk will be managed.

Coastal flood hazard maps​

We've created coastal flood hazard maps that cover c​oastal flooding between 2020 and 2120 for various type of coastal flood events.

​You can see our coastal flood hazard maps in the Jersey Strategic Flood Risk Assessment report​. 

These flood hazard maps have been produced for coastal flooding between 2020 and 2120, including different severity of events.

These maps have considered the effects of climate change on coastal flooding due to rising sea levels, increased height of waves and more extreme weather events.​

The maps will be updated periodically as our coastal model are updated. ​​