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Coastal Erosion Challenges on the Dungeness Coastline: A Comprehensive Analysis

This report delves into the critical issues facing the Dungeness coastline, the largest shingle beach in the UK, spanning 38 km in Kent and East Sussex. Key problems include significant erosion at 2 meters per year and the resulting threats to infrastructure, particularly near nuclear power stations. It outlines the geological background, current challenges, and assesses possible solutions, including the construction of new groynes and the continuation of existing practices. The conclusion highlights the urgent need for effective management strategies to protect this vital coastal environment.

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Coastal Erosion Challenges on the Dungeness Coastline: A Comprehensive Analysis

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  1. DUNGENESS COASTLINE By Tim McMahon Richard Smith

  2. Agenda • Site Description • Geology and Current Problem • Possible Options • Chosen Solution • Conclusion

  3. Site Description Map / Location Largest example of shingle beaches in UK. 38 km stretch of coastline in Kent and East Sussex.

  4. Site Description Geographical features 8 sq.miles of exposed shingle – ‘cuspate’ foreland Habitat for much wildlife and vegetation Townships in Walland Marsh MoD firing ranges Power Stations Observatory Agriculture Aggregate

  5. Geology and Problem Formation of Geology Geomorphologic Process over 4,000 years Longshore Drift – carries material from West to East Extreme western flank is eroding at 2m per year: 200,000 tonnes of shingle per yr Three chronological stages: 1) >10,000BC, 2) 1200 – 1800AD, 3) 1700 - present Composition: 98% flint

  6. Geology and Problem Current Problem Deficit of material immediately in front of the nuclear power stations If ‘do nothing’, over the next 50 yrs £250,000,000 damage. Damage to property Loss of MoD Training Facilities Loss of power stations, and the complete loss of whole towns.

  7. Possible Options • Required Standards -Nuclear Power Plant -Surrounding Areas -Environment -Economy -Engineering • Do Nothing • Continuation of Current Practices • Construction of New Groynes • Removal of Rye Harbour Terminal Groyne • Sea Wall

  8. Chosen Solution • Continuation of Present Practices • How it Works • Advantages • Disadvantages • Improvements

  9. Conclusion • Geology and its Consequences • The Problem - Long-shore Drift - Nuclear Power Plant - The three E’s • The Solution • The Future

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