Vulnerability of floodways under extreme flood events

Wahalathantri, Buddhi Lankananda and Lokuge, Weena and Karunasena, Warna and Setunge, Sujeeva (2015) Vulnerability of floodways under extreme flood events. Natural Hazards Review, 17 (1). ISSN 1527-6988

Abstract

Floodways are commonly used in rural road networks due to the economic and environmental benefits offered as a low-cost and practical road crossing in flood-prone areas. They are designed with provision for submergence so that water flows over with minimum impediment to flow, at a probability given design flood. The floodway design process is traditionally governed by hydraulic aspects rather than structural aspects. Hydrological condition, availability of material, and familiarity of construction techniques are significant when selecting the floodway type. Nevertheless, extreme conditions can cause significant damage to floodways, as was evident from the 2011 and 2013 Queensland flood events, during which 58% of floodways in the Lockyer Valley Regional Council (LVRC) area in Queensland, Australia, which is the case study area of this paper, were damaged, causing huge economic lost at council and national level. This created a new track in research and development activities to assess vulnerability and to find methods for improving the resilience of floodways during extreme flood events. In line with this, the present study evaluates local design guidelines and damaged floodways to assess failure modes and severity of damage using a damage index (DI) method.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 22 Apr 2016 02:32
Last Modified: 06 Sep 2016 02:30
Uncontrolled Keywords: floodway; flood; damage index; damage severity; design guidelines; vulnerability
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090505 Infrastructure Engineering and Asset Management
Funding Details:
Identification Number or DOI: 10.1061/(ASCE)NH.1527-6996.0000194
URI: http://eprints.usq.edu.au/id/eprint/28229

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