A New Approach To Calculate Extreme Storm
Surges: Analysing The Interaction Of Storm
Surge Components
Author(s)
G. Gönnert & K. Sossidi
Abstract
The North Sea coast is, as well as many coastal regions, a preferred residential
and industrial area. At the same time the North Sea coast is seriously threatened
by storm surges. Climate change and resulting consequences will have severe
effects on the safety in coastal areas. The Project XtremRisK – Extreme Storm
Surges at Open Coasts and Estuarine Areas, Risk Assessment and Mitigation
under Climate Change Aspects, will assist in facing this challenge. The \“Source-
Pathway-Receptor”-Concept will be used as a basis for risk analysis and
development of new management strategies.
Within the XtremRisK project, a method to assess extreme events will be
developed which takes the hydrodynamics of storm surges into account. With
this method, the components of a storm surge, tide, wind surge and external
surge, and their interaction will beanalysed. The study focuses on analysing
(i) the highest event of each component and (ii) the interaction between tide and
surge as well as the interaction between surge and external surge. This detailed
analysis is needed because the components do not interact linearly. With this
knowledge, an extreme event based on the observed extremes of the components
can be calculated. Non-linear addition leads to a lower water level than in case of
linear superposition. With this approach, an extreme event can be calculated in
accordance with natural law.Subsequently, extreme events will be assessed using
conditions which reflect the climate change scenarios.
Keywords: storm surges, North Sea, extreme events, non-linearity, coastal
protection, design level.
Keywords
storm surges, North Sea, extreme events, non-linearity, coastal
protection, design level
Related Book
Other papers in this volume
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