Floodway (road)
A floodway is a flood plain crossing for a road, built at or close to the natural ground level.[1]
A floodway on a gravel road
They are designed to be submerged under water, but withstand such conditions. Typically floodways are used when the flood frequency or time span is minimal, traffic volumes are low, and the cost of a bridge is uneconomic[2][3] – in most cases, in rural areas.
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Floodway on Great Northern Highway, Western Australia
Floodway and signs, eastern side of Southern Cross, Western Australia
Floodway (road goes across the photo) in Baja California, Mexico. Note bridge behind it.
Notes
- Edmonds, Leigh (1997). The Vital Link: A History of Main Roads Western Australia 1926–1996. Nedlands, Western Australia: University of Western Australia Press. p. 184. ISBN 1-875560-87-4.
- MRWA Waterways Section; BG&E Pty Ltd (24 April 2006). "Floodway Design Guide" (PDF). Main Roads Western Australia. p. 4. Archived from the original (PDF) on 15 April 2015. Retrieved 15 April 2015. Additional archives: 15 April 2015.
- Austroads; Flavell, David; Audora, Henry (1994), Waterway design : a guide to the hydraulic design of bridges, culverts and floodways, Austroads, ISBN 978-0-85588-440-6
- Department of Transport and Main Roads (March 2010). "Chapter 10 Floodway Design" (PDF). Road Drainage Manual. Queensland Government.
- Lokuge, Weena; Setunge, Sujeeva; Karunasena, Warna (2014). Investigating the performance of floodway in an extreme flood event (PDF). 1st International Conference on Infrastructure Failures and Consequences (ICFC 2014) 16–20 July 2014. Melbourne, Australia.
gollark: Why? Causality is irritating. I want a time machine.
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gollark: In the UK, there are better consumer protections on credit cards for what I am sure are horrific historical reasons.
gollark: Brevity good, actually.
gollark: "Correlated" doesn't mean "one causes all change in the other even in extreme circumstances".
See also
- Flood control channel
- Glossary of road transport terms
- Low water crossing
External links
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