Happisburgh Coastal Erosion (Managed Realignment)
Happisburgh, Norfolk, UK · Ongoing (policy of managed realignment applied; emergency works in 2002 and 2007; rock armour re-aligned in 2015) · £15 million (estimated cost to close the gap in sea defences and protect Happisburgh, but unlikely to be spent on hard engineering).
The judgement call
Account-gated at launchHappisburgh is a key location for exploring coastal adaptation to climate change and erosion. - The policy of managed realignment means that central government funding for long-term hard engineering is unlikely. - Emergency works and rock armour placement have been used as short-term responses to protect properties. - The project highlights the difficult decisions faced by communities and authorities in areas of rapid coastal erosion, particularly when the cost-benefit analysis does not support traditional hard defences. - The formation of local action groups (e.g., Coastal Concern Action Group) demonstrates community involvement in coastal management.
Key engineering challenges
Managing rapid coastal erosion along a highly active stretch of the Norfolk coast, with soft cliffs susceptible to mass movement. - Implementing a policy of "managed realignment" (managed retreat) which allows the coastline to erode naturally, while providing some temporary protection and support for communities to adapt. - Dealing with the social and economic impacts of property loss and community displacement due to erosion. - Balancing the need for coastal protection with the high cost of hard engineering solutions and the natural processes of the coastline.
Project facts
- Client / owner
- North Norfolk District Council (NNDC); Environment Agency; Coastal Concern Action Group (CCAG)
- Lead contractor
- —
- Lead designers
- —
- Project type
- managed realignment | emergency works
- Scale
- Over 250m of land lost between 1600 and 1850; cliffs range from 6 to 10m in height; 4,000 tonnes of rock armour placed in 2002, 1,000 tonnes in 2007, 9,000 tonnes re-aligned in 2015.
- Disciplines
- coastal engineering; environmental; geotechnical
- Standards & frameworks
- Shoreline Management Plan; relevant UK coastal erosion policies.
Sources: "Coastal Adaptation at Happisburgh", North Norfolk District Council, https://www.north-norfolk.gov.uk/media/3078/happisburgh-case-study.pdf - "Happisburgh Case Study", Internet Geography, https://www.internetgeography.net/geotopics/happisburgh-case-study/ - "Happisburgh's Coastal Management: The Current Situation", Facebook (Happisburgh.Haisbro.CEC), https://www.facebook.com/groups/happisburgh.haisbro.cec/posts/1501152041329244/ - "Coastal erosion at Happisburgh, Norfolk", British Geological Survey, https://www.bgs.ac.uk/case-studies/coastal-erosion-at-happisburgh-norfolk-landslide-case-study/