Flood protection in The Netherlands dr. Sybe Schaap, Flood protection in The Netherlands dr. Sybe Schaap, President Association of Water Autorities Chairman Water Board Groot Salland
Netherlands: best protected delta region word wide
The Netherlands 26% below sea level When no dikes/dunes: 66% frequently under water
The Netherlands 26% below sea level When no dikes/dunes: 66% frequently under water
The Netherlands 26% below sea level When no dikes/dunes: 66% frequently under water
Threats - North Sea - Inner Lake: Ysselmeer - Main Rivers: Rhine, Meuse
Risks - level country: to 6 m below sea level - dense population: 12 mln below sea level - high level of investments - insurance/evacuation impossible Solution: high level of protection = prevention against floods
Protection - rings of levees - dams: fixed or flexible
Level of protection - 1/1.250 - 1/10.000 - level probably insufficient
Organization of water management - Central government. - legal system Organization of water management - Central government - legal system - strategic policy - main system - Regional Water Authorities
Water Authorities in The Netherlands: 26
Lessons from history - often to late: disasters - clever response = reactive attitude - 1953: flood from North Sea - 1995: flood from River Rhine - challenges for response
Response - Protection Ysselmeer (1932) - Delta plan North Sea (1959) - Delta plan main rivers(1995) - Room for Rivers (2004) - New Delta Commission (2007)
Protection Ysselmeer
Protection Ysselmeer
Delta plan North Sea
STORMVLOEDKERING OOSTERSCHELDE Barrier Oosterschelde
Maeslant barrier
Deltaplan Main Rivers
Inflatable barrier Ramspol
Inflatable barrier Ramspol
Inflatable barrier Ramspol
Kampen
Flood defence system Kampen (red line)
Room for Main Rivers
Bypass Kampen
Delta Commission - Pro active attitude - Vision until 2200 - Extraction of new measures - coast defense - threat from rivers - soil subsidence
Threat word wide - climate Threat word wide - climate? - sea level - soil subsidence in urbanized areas (delta’s/coasts) - density of population - New Orleans: wake up call
Protection. corporation of:. - public authorities Protection corporation of: - public authorities - private partners Challenge: creativity