15. High tech engineering solutions
Maeslant closure
Port of Rotterdam
450 M€
Eastern Scheldt closure
Delta region
2500 M€
16. Room for the River 1995 – present
• > 800 km dike
improvement 400 M€
• 2200 M€
http://siti.feem.it/mulino/dissem/intcon/vanderm.pdf
17. Flood prevention principles for the future
1. Legally established flood safety standards
2. Water based physical planning and water proof building
3. Self reliance of the public and clear evacuation
procedures
– Awareness
– Avoidance
– Alleviation
– Assistance
17
19. Flood safety
standards
1:10000 yr
1:4000 yr
1:2000 yr
1:1250 yr
Investments & Operations:
National 550 M€ (2008)
Maintenance:
Regional 200 M€ (2008)
Source: Water in Beeld 2009
22. Regional water authorities - self governance
Independent government body:
• 800 years old system
• own legal power
• own tax system
• own elections
• budget € 2,6 bln/y
• 10.500 employees
Water management tasks:
• 16 million people
• 235.000 km water courses
• 17.500 km dikes, levees
• irrigation and drainage
• groundwater management
• surface water quality
• 390 urban wastewater treatment plants
22
23. Government institutions Netherlands
Central
Government
General Provinces Functional
Provincies
democracy (12) democracy
Municipalities Regional Water
(431) Authorities (26)
23
25. Association of Regional Water Authorities
• Established in 1927
• Umbrella organisation of the
26 Regional Water
Authorities in the
Netherlands.
• Offices in The Hague and
Brussels
• Promotion of regional water
governance.
25
27. Examples 1
Port of Rotterdam storm
surge barrier
Restoration of catchment
storage capacity
27
28. Examples 2
Flooding „s-Hertogenbosch 1995
Storage basin &
Nature conservation area
6 million m3 storage
Return period 1/25 year
28
29. Examples 3
Flood-proof building
in flood plains Dordrecht
Floating houses
Amsterdam
29
30. Conclusions
• Awareness, Alleviation, Avoidance & Assistance are key
factors in an ingrated flood prevention approach.
• Physical planning should be based on the scale of the river
(sub)catchments.
• Flood prevention and flood management depend on leadership
in government and a financially sustainable budget.
• The costs of flood prevention and flood management in the
Netherlands is appr. € 1,5 bln/y or 0,2% of GNP.
• Self governance and self financing of the regional water
authorities should be maintained.
30