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Cascading flood compartments with adaptive response

Publikationstyp
Journal Article
Date Issued
2008
Sprache
English
Author(s)
Pasche, Erik  
Ujeyl, Gehad  
Goltermann, Dagmar  
Meng, J.  
Nehlsen, Edgar  orcid-logo
Wilke, Markus  
Institut
Wasserbau B-10  
TORE-URI
http://hdl.handle.net/11420/5210
Journal
WIT transactions on ecology and the environment  
First published in
WIT transactions on ecology and the environment
Number in series
118
Start Page
303
End Page
312
Citation
WIT Transactions on Ecology and the Environment (118): 303-312 (2008)
Contribution to Conference
1st International Conference on Flood Recovery, Innovation and Response, FRIAR, London, 2008  
Publisher DOI
10.2495/FRIAR080291
Scopus ID
2-s2.0-58849135832
Publisher
WIT Press
In consequence of the climate change, a sea level rise within the coming decades is highly probable and the intensity of storm surges will probably increase at least in the North Sea region. In this changing environment, great uncertainty exists about the need to adapt conventional coastal flood protection structures. This calls for response strategies to improve the flood resilience behind the dikes, in the Hinterland. Within this paper, the concept of cascading flood compartments is presented as an appropriate strategy to deal with the residual risk in the Hinterland. The key element of this approach is that an overtopping of the main dike line is accepted requiring their enforcement to resist erosion from hydrodynamic loads. Inner dikes are arranged in a multi-layer cascade of compartments creating a redundant system of flood containment. The necessary adaptations and restrictions to the built environment vary from simple resistance measures of dry- and wet-proofing to the development of amphibious settlements with floating homes and houses on piles. The whole concept is illustrated on the island of Wilhelmsburg in Hamburg, where urban areas are protected against storm surges through a ring dike. The necessary storage capacity of the flood compartment system is determined for the climate change scenarios of 2030 and 2085. A realistic arrangement of flood compartments can be found, proving the effectiveness and efficiency of this response strategy. 3d graphics illustrate the transfer from a water-abandoned city to an amphibious city, backing the statement that this flood response strategy opens new opportunities for cities. © 2008 WIT Press.
Subjects
Amphibious cities
Cascading flood compartments
Climate change
Flood response strategy
Flood risk management
DDC Class
710: Landschaftsgestaltung, Raumplanung
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