1. Eastern Solent Coastal Partnership
‘Working with our neighbours to protect Hayling Island’
Samantha Cope
- Last phase of 5 year BMP
- Currently writing technical report and OBC for next 5 year phase
- Talk focusing on use of monitoring data to establish volume requirements, identify alternative sources of material and negotiate with landowners

2. Coastal processes and alternative sources of material
Background
Coastal processes and alternative sources of material
Gunner Point (2013) © Samantha Cope

3. Coastal processes and alternative sources of material
Background
Coastal processes and alternative sources of material
Gunner Point (2013) © Samantha Cope

4. Eastoke Nourished Frontage Eastoke Point Coastal Defence Scheme
Background
Eastoke Nourished Frontage
Eastoke Point Coastal Defence Scheme
South Hayling BMP

5. Eastoke Peninsula – Coastal Risks Problem
Flood Zone 2 1 in 1000 yr
Flood Zone 3 1 in 200 yr
Flood Zone 3 1 in 200 yr
Flood Zone 2 1 in 1000 yr
Flood Zone 2 1 in 1000 yr
Flood Zone 3 1 in 200 yr
Flood Zone 2 1 in 1000 yr
Flood Zone 3 1 in 200 yr
Green / blue
Approximately 1750 properties at risk of flooding over next 100 years
Over 200 properties at risk of erosion (over 100 years)

6. - Next 5 year phase will extend
Eastoke Peninsula – Historic Flooding (2005)
Beach Management Activities
Following 1985 beach recharge scheme, the 1 in 200 year design profile maintained through:
periodic import and Chichester bar dredge with annual recycling
- Current planning boundaries
- Next 5 year phase will extend

7. Environmental conditions
Next 5 year phase
With revised economics and efficiency targets, alternative and local sediment sources will assist the business case
Dependent on:
Landownership
Environmental conditions
Valentines storm 2014 7

8. Coastal processes and alternative sources of material
Background
Coastal processes and alternative sources of material
Gunner Point (2013) © Samantha Cope

9. Coastal processes
SCOPAC Sediment Transport Study (2004)

10. Coastal processes Summer baseline surveys Below design volume
HR Wallingford © Clare Wilkinson 10

11. Coastal processes
The winter of 2013/2014 was the stormiest on record since the Hayling wave buoy was deployed.  
During the winter of 2015/16, CCO note, ‘eight storms exceeded the 2.9m threshold from midwinter to early spring.
December 2015 saw highest number of bi-modal wave events recorded since 2003 for Hayling wave buoy (38% as opposed to 11% average)
The storm on 28 March 2016 was the largest recorded at the site and was distinctly bi-modal with waves of around 17 seconds, while the rest were relatively unexceptional’
CCO Hayling BMP wave report (2016)
Given the Eastoke Point scheme was built by November 2013, the severity of flooding via Bosmere Road to Eastoke was less for the winter of 2013/14 and minimal for 2015/16 compared with the 3rd November 2005.
HR Wallingford © Clare Wilkinson 11

12. Where from? Nourished frontage
Past 10 years, average of 51,000 m3 moving out of nourished frontage aswell as being brought back in
Previous PAR costed 36,500 m3 per annum
OBC requesting additional 14,500 m3 per annum
Given the Eastoke Point scheme was built by November 2013, the severity of flooding via Bosmere Road to Eastoke was less for the winter of 2013/14 and minimal for 2015/16 compared with the 3rd November 2005.
Where from?
Gunner Point (2016) 12

13. Alternative sources Gunner Point BUT - Privately owned
- SSSI with vegetated shingle and Annex I annual vegetation of drift lines
Gunner Point
Ongoing negotiations over many years
2013/14 storms and monitoring data assisted negotations
- Monitoring data and tracer studies provided evidence base for negotiations with landowner and Natural England

14. Alternative sources

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25. Alternative sources
Annual accretion Gunner Point = 15,000 – 25,000m3 last 12 years

26. Alternative sources

27. Alternative sources: Gunner Point
- Recent negotiations with landowner have given approval in principle to work together for future 5 year Hayling BMP
- NE have also given approval in principle with environmental restrictions, following pre-planning advice
Gunner Point (2013) © Samantha Cope 27

28. Proposal
Initial campaign: back to 2016 annual vegetation of drift lines alignment
Thereafter extract material seaward of annual vegetated drift lines
Accretion volumes to be monitored every year
Vegetated shingle survey at end of survey season (August) every year
Ecological pre-works survey to identify nesting birds 28

29. Summary Existing BMP funding expires March 2017
Identified alternative and locally sourced material for future 5 year BMP to support business case
Monitoring data assisted with
Review of quantity of material required for nourished frontage
negotiations with landowners
Approval in principle from landowners and Natural England to extract from Gunner Point
Looking west towards Gunner Point (2016) 29

31. Future tests of design profile
- These alternative sources of material will become even more important in the future if the design profile volumes increases
- Tests will be undertaken over next 5 years to establish whether we should be increasing the design profile. We now have a new tool (SHINGLE-B) to assess bi-modal waves.
- Early experiments suggest the design profile will increase.
CCO Hayling BMP wave report (2016)
HR Wallingford © Clare Wilkinson 31