Post on 01-Jan-2016
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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
Contents
• Public sector in a nutshell• 9 weak links in the coast• Delfland coast• Anticipation of climate change• Support base
Public sector structure
Central Government
12 Provincial authorities
458 Municipal authorities
27 Waterboards
Functional democracy
General democracy
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
Weak links inthe coast
• Between now and 20 years a safety problem
• Economical and ecological importance requires a for an integrated approach
Delfland coast
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
Organization of the plan development processNational 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)
35 ha dunes
Mainport Development Rotterdam:construction of a new harbour area Maasvlakte II
Compensation is needed for effects on existing dunes (among other effects)
Alternatives investigated
• Landward reinforcement of the sea defence
• Reinforcement at the same location– Heightened dunes
• Seaward reinforcement – Seaward
– More seaward
Preferred alternative: seaward
Southern part
Northern part
Ter Heijde
Kijkduin
Hoek van Holland
Scheveningen
Anticipation of climate change
• Designed for 50 years (sea level rise)anticipation of 200 years
• Solutions with sand are flexible
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