Probabilistic depth–damage curves for assessment of flood-induced building losses

Heather McGrath (), Ahmad Abo El Ezz and Miroslav Nastev
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Heather McGrath: Canada Centre for Mapping and Earth Observation, Natural Resources Canada
Ahmad Abo El Ezz: Geological Survey of Canada, Natural Resources Canada
Miroslav Nastev: Geological Survey of Canada, Natural Resources Canada

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2019, vol. 97, issue 1, No 1, 14 pages

Abstract: Abstract The most common and internationally accepted method of assessing building damage due to flooding is through the application of a depth–damage curve (DDC). A DDC relates the percent damage or estimated economic loss to a buildings’ structural integrity and/or contents directly to a given water level (depth). The DDC generally represents an average structure within a given building category, e.g. one-storey single-family residence. Given the great variability across any given structural category, the variation in building materials, construction quality across communities and the singular focus on depth for estimation of losses, it is important to communicate the uncertainty and potential variability of the expected losses in any assessment. In this paper, probabilistic depth–damage curves (PDDCs) are developed based on synthetically derived DDCs from communities in southern Ontario. The generated PDDCs are based on assumed loss thresholds for minor and major loss levels, as spent in Canadian dollars. The economic loss estimates obtained in this way and their likelihood of being exceeded at any given flood depth express more transparently the potential building losses. An applied example of this method is included for both aggregate and building-by-building loss estimation.

Keywords: Depth–damage curve; Flood losses; Flood damage; Building losses (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1007/s11069-019-03622-3

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