A flood risk curve development for inundation disaster considering spatio-temporal rainfall distribution
To manage flood disaster with an exceeding designed level, flood risk control based on appropriate risk assessment is essential. To make an integrated economic risk assessment by flood disaster, a flood risk curve, which is a relation between flood inundation damage and its exceedance probabilit...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-06-01
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| Series: | Proceedings of the International Association of Hydrological Sciences |
| Online Access: | https://www.proc-iahs.net/370/57/2015/piahs-370-57-2015.pdf |
| Summary: | To manage flood disaster with an exceeding designed level, flood risk
control based on appropriate risk assessment is essential. To make an
integrated economic risk assessment by flood disaster, a flood risk curve,
which is a relation between flood inundation damage and its exceedance
probability, plays an important role. This research purposes a method to
develop a flood risk curve by utilizing a probability distribution function
of annual maximum rainfall through rainfall-runoff and inundation
simulations so that risk assessment can consider climate and socio-economic
changes. Among a variety of uncertainties, the method proposed in this study
considered spatio-temporal rainfall distributions that have high uncertainty
for damage estimation. The method was applied to the Yura-gawa river basin
(1882 km<sup>2</sup>) in Japan; and the annual economic benefit of an existing dam
in the basin was successfully quantified by comparing flood risk curves
with/without the dam. |
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| ISSN: | 2199-8981 2199-899X |