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Reinforcement of the Delfland coast

Reinforcement of the Delfland coast. Edith van Dam Directorate-General of Public Works and Water Management.

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Reinforcement of the Delfland coast

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  1. Reinforcement of theDelfland coast Edith van DamDirectorate-General of Public Works and Water Management Projectmanager: Rob Ammerlaan (Delfland Waterboard)Pieter Beeldman, Arie van Blanken, Edith van Dam, Ytje Feddes,Jasper Filselier, Jerry Haket, Joost ter Hoeven, Roland Hoyinck, Arjan van de Lindeloof, Jeroen Rietdijk, Marjolein Rours, Lisette Veeken, Jack Vessies

  2. Contents • Public sector in a nutshell • 9 weak links in the coast • Delfland coast • Anticipation of climate change • Support base

  3. Public sector structure Generaldemocracy Central Government 12 Provincial authorities 458 Municipal authorities 27 Waterboards Functional democracy

  4. Competences in coastal management: • National administration: lawmaking, safety standards • Ministry of Transport, Public Works and Water Management: coastline preservation, beach nourishments • Waterboards: flooddefence • Municipalities: spatial planning • Provinces: regional planning, supervision of waterboards and municipalities, approval of reinforcement plans

  5. Weak links inthe coast • Between now and 20 years a safety problem • Economical and ecological importance requires a for an integrated approach Delfland coast

  6. Water safety Water safety is established by law: • Protection levels • Five-yearly assesment Protection level South-Holland:resist a storm surge occuring once in 10.000 years on average

  7. The Netherlands without dykes

  8. Organization of the plan development process National government commissioned provinces to develop plans for coastal reinforcement and improvement of the quality of the environment Delfland coast: • Delfland waterboard (projectmanager) • Province Zuid-Holland (directing function) • Municipalities (The Hague, Westland, Rotterdam), • National authority (funding safety solutions)

  9. Scheveningen Characteristics of the Delfland coast Kijkduin Ter Heijde Hoek van Holland

  10. Hoek van Holland

  11. Characteristics of the Delfland coast Ter Heijde

  12. Characteristics of the Delfland coast Kijkduin

  13. Characteristics of the Delfland coast Scheveningen

  14. 35 ha dunes Mainport Development Rotterdam:construction of a new harbour area Maasvlakte IICompensation is needed for effects on existing dunes (among other effects)

  15. Alternatives investigated • Landward reinforcement of the sea defence • Reinforcement at the same location • Heightened dunes • Seaward reinforcement • Seaward • More seaward

  16. Preferred alternative: seaward Southern part Hoek van Holland Ter Heijde Northern part Scheveningen Kijkduin

  17. Anticipation of climate change • Designed for 50 years (sea level rise)anticipation of 200 years • Solutions with sand are flexible

  18. Anticipation of climate change (2) Straight coastline & broad beach:Dunes can grow in a natural way by coastal nourishment and cope with future safety standards

  19. Support base • Different government levels working together • Understanding of stakeholders is crucial • Seaward: (almost) no resistance • Tailor made solution for Kijkduin

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