Cascading Flood Compartments With
Adaptive Response
Author(s)
E. Pasche, G. Ujeyl, D. Goltermann, J. Meng,
E. Nehlsen & M. Wilke
Abstract
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.
Keywords: climate change, flood risk management, cascading flood
compartments, flood response strategy, amphibious cities.
Keywords
climate change, flood risk management, cascading floodcompartments, flood response strategy, amphibious cities.
Related Book
Other papers in this volume
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