1. Lonstrup Løkken and Hjørring in the Dutch Coast Petra Goessen

2. Safety standards of the Netherlands
Dune and beach responsibilities
Lonstrup Løkken and Hjørring, at the Dutch Coast…

3. 9 mil people
70 % of BNP

4. 70% below sea level

5. Agreements – introduction

7. Flood area after a breach
% left behind
Velocity of water

8. Note; But not cascading effects

11. Responsibilities at the coast since the 60’s
Rws;
Safety standards and software development
Sand nourishment (dunes itself are within the water boards)
(ca 200 km primary dykes, <500 km regional)
Regional water authorities (water boards)
All safety assessment, monitoring, inspections
(for HHNK ca 3100 km primary dykes and dunes, 1400 km regional dykes)
Maintenance of dunes for safety
Provinces
Safety standards and software development for regional dykes
Nature zones
Municipalities
Building restrictions
Clean beach

12. Adaptation strategy
Prevention at all times
Soft solutions as a rule
Hard solutions only when needed
Maintenance to follow sea level rise
Sand beneficial for use of coast
Learning by doing

13. Effects of nourishments
Slowly growing with sea level rise
Nourishments beats groins and hard constructions by far
Less erosion
Swimmers safety
Good trust and experience
Stormy / calm winters
Beach width does not change; natural balance
But; make place for sand! (beach huts and pavillions on the move)

18. Morphology/safety Regional water authority national water authority
nature conservation province
municipality

19. Spatial planning (coast pact)
Regional water authority national water authority
nature conservation province
municipality

20. Communities of best practices
Theme group water boards
National knowledge platform
Regional coast meetings; nourishments, long term issues
Provinces, nature managers, municipalities, national and regional water authorities, chamber of commerce
Community of beach managers; Municipalities of NH; beach management, short term issues
NCK days; research institutes
Kring of Coastal engineers; Are you interested in joining us?

22. Lonstrup strand concrete or brick building on asphalt

24. Lonstrup strand in Egmond

25. Lonstrup strand in Egmond
WB; not allowed
RWS;
Not allowed

26. pavillion of wood on the beach√
WB; allowed
Fall apart in 2,5x2,5
Or removed within 24 hrs
X meters from dune foot
Advise for minimum floor level
RWS
10 m from high water level

27. Lonstrup building behind dune

28. Lonstrup building behind dune√
Prov: allowed!
Rws+wb; no saying

29. Lonstrup building on top of dune

30. √ WB + prov; allowed Only in built areas
Stand still principle; no negative effects to safety level
Rws; no stakeholder

31. Hjørring building on top and dune foot enforcements

32. Hjørring building on top and dune foot enforcements
WB and RWS; not allowed. To build; not safe!
To maintain; no hard materials; for neighbouring effects; solidarity.

33. Løkken Strand beach hut winter

34. Løkken strand beach hut winter
WB; not allowed
RWS;
Not allowed

35. Løkken strand beach hut summer

36. Løkken strand beach hut summer√
WB; allowed
Fall apart in 2,5x2,5
Or removed within 24 hrs
X meters from dune foot
RWS; allowed
- 10 m from high water level

37. WB/municipality/rws; nope.
Good luck with that;), sand is not hard
Safety of swimmers

38. Hirtshals

39. New research for optimal;
design of huts and pavillions
distances for huts and pavillions
maintenance of beach, foreshore and dune

40. Smart phone technology for data collection

41. Egmond aan Zee