Damage And Loss Prediction Model Considering
Inundation Level, Flow Velocity And Vulnerability
Of Building Types
Author(s)
H. Maiwald & J. Schwarz
Abstract
Reliable prognoses of building damage caused by flood impact require realistic
relationships between action and damage or loss describing parameters. Due to
the fact that commonly applied damage functions are related to the different
usage classes (i.e. private housing), the required differentiation according to the
parameters on the resistance side is still missing and further impact parameters
like flow velocity remain unconsidered. On the basis of the Earthquake Damage
Analysis Center (EDAC) flood database (including different datasets collected
after the 2002 flood in Saxony), a method to determine the structural damage and
the losses for any given flood scenario was developed. The key elements of the
developed method are the engineered evaluation and categorization of the
existing building stock, the definition of five damage grades with respect to the
observed damage patterns and the classification of building types into
vulnerability classes (and the consideration of the inherent scatter). Specific
Functions enabling the calculation of damage grades and the loss assessment in
separate steps of the same procedure. Specific Vulnerability Functions (SVF) are
related to the inundation level or additionally the flow velocity (action side), and
the predominant building types or the vulnerability classes (resistance side).
Specific Damage Functions (SDF) can calculate the expected losses directly
under consideration of the inundation level and the predominant building types
(SDF of Type 1a) or the assigned vulnerability classes (SDF of Type 1b). SDF of
Type 2 transfers the damage grades into loss statements. The developed tools are
applied to the reinterpretation of the August 2002 flood damage. Results are
presented for different study areas on a micro-scale level. In all cases,
remarkably good agreement between the predicted and the reported losses can be
Keywords
damage grades, flood damage, damage functions, flow velocity, loss estimation, specific energy height, vulnerability classes, vulnerability functions
Related Book
Other papers in this volume
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