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Tytuł pozycji:

Establishment of detailed loss functions for the urban flood risk assessment in Chao Phraya River basin, Thailand.

Tytuł :
Establishment of detailed loss functions for the urban flood risk assessment in Chao Phraya River basin, Thailand.
Autorzy :
Komolafe, Akinola Adesuji
Herath, Srikantha
Avtar, Ram
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Temat :
FLOOD risk
RISK assessment
FLOOD damage
REGRESSION analysis
DISASTERS
Źródło :
Geomatics, Natural Hazards & Risk; Dec2019, Vol. 10 Issue 1, p633-650, 18p, 6 Charts, 5 Graphs, 2 Maps
Czasopismo naukowe
The continuous increase in damages to flood disasters globally has informed the need to assess vulnerability of built-up exposures for future flood risk reduction. The aim of this paper is to understand the contributions of some important variables in flood damage processes and develop loss functions for global building types, for the estimation of flood economic damages in Chao Phraya river basin, Thailand. We obtained empirical damage data (118 samples) through questionnaire survey in the study area for analysis. Using multiple linear regressions analysis, we generated loss functions for the aggregated residential building incorporating multiple damage factors. Further, disaggregated vulnerability curves (as a function of water depth) were established using logarithm function for three global building types in the study area. Results showed that, under flood condition in the study area, water depths and building age are very important damage factors, other variables are also emphasized. The loss models show maximum predicted vulnerability indices of 0.36, 0.30 and 0.10 for wooden, concrete frame and unreinforced masonry, and reinforced concrete moment frame, respectively. These functions can be used for modeling flood damage, for future disaster risk reduction and for risk comparison across countries. [ABSTRACT FROM AUTHOR]
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