How our coast is defended
The coastline between Brighton Marina and the River Adur in Shoreham features one of the country’s most iconic tourist beaches.
Our coastline is currently defended by:
- Brighton & Hove’s beaches, which are the primary form of protection from coastal flooding and erosion
- chalk cliffs, such as the Undercliff Walk
- sea walls
- timber groynes
Shingle recycling and renourishment
Wave movement shifts sand and shingle east from Shoreham Port towards Brighton Marina. This is a process known as ‘longshore drift’.
Each year, we move an average of 16,000 metres cubed of shingle back from around the Marina to beaches further west and at Shoreham Port.
Challenges facing our coastline
The impact of Climate Change and rising sea levels
Due to a combination of long-term climate change predictions and rises in sea levels, the beaches, together with residential and commercial properties along the coastline, are at risk of flooding and erosion.
What we are doing about it
Brighton & Hove City Council and Adur & Worthing District Councils have created a strategy to manage this risk in order to ensure that the coastline remains a vibrant and vital focus for the area’s economy. The strategy is known as the Brighton Marina to River Adur Flood and Coastal Erosion Risk Management Scheme and covers the area highlighted in the map below.
The aim and benefits of the scheme
The aim of the Brighton Marina to River Adur Flood and Coastal Erosion Risk Management Scheme is to improve our coastal defences and reduce the risk of long term (1 in 200 year) flood and erosion risk.
The scheme will have significant local benefits including avoidance of the loss or residential and commercial properties, including Shoreham Sewage Pumping Station and Shoreham Power Station.
How the scheme is being funded
The scheme is being paid for from a series of centrally funded packages set out by the Government, to construct new flood and coastal defences.
You can find out more on this Defra blog.
What’s been done so far
The following have been completed:
- a series of investigations to improve our understanding of the area.
- a survey of the flood and coastal erosion risk management structures to determine their condition
- a review of up to date information on waves, water levels and beach surveys to assess how the coastline behaves and to predict how it may evolve.
- a Strategic Environmental Assessment to collate baseline information on the natural and built environment
The improvements being made
We're still working with our consultants and engineers to confirm the exact technical plans but in essence we will be:
- repairing and strengthening floods walls and defences where necessary
- replacing existing flood walls and defences that cannot be repaired or provide insufficient protection
- installing new timber Groynes along Kings Esplanade
What’s happening next
Works needed to be undertaken as part of the scheme will be phased as follows:
- Spring 2022: Site surveys and ground investigations
- Spring 2022: Technical design planning
- Spring 2023:Construction activities phase 1
- 2024: Construction activities phase 2
- 2029: Construction activities phase 3