IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 34th Congress - Brisbane (2011) : THEME 4: Responding to Shifting Water Resources : Managing urban regrowth with an ‘at capacity’ stormwater infrastructure
Managing urban regrowth with an ‘at capacity’ stormwater infrastructure
Author : A Tennakoon1, J R Argue2
The stormwater infrastructure of the City of Gosnells, WA, is ‘at capacity’. The cost of conventional upgrade ahead of further urbanisation has been estimated as $120 million. An alternative, cost-effective approach has been adopted based on WSUD ‘source control’ principles. There are two soil domains: sand and sandy-clay, and, medium to heavy clay. The adopted criterion for stormwater control is set at ARI, Y = 100-years, determined for the (site) worst case resulting from application of storm durations 6 mins to 72 hours. Three design scenarios result: (1) large lots in sand or sandy-clay soil require full retention/disposal on site with no outflow to street drainage; (2) Small lots (A < 350 m2) in sand or sandy-clay require retention/disposal on site with permissible outflow equivalent to pre-development ARI, Y = 5-years; (3) All lots in medium to heavy clay soil require full detention on site with permissible outflow equivalent to pre-development ARI, Y = 5-years. A design spreadsheet has been prepared: this provides details of ‘soakwell’ and detention installations and provision for outflow.
File Size : 761,842 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 34th Congress - Brisbane (2011)
Article : THEME 4: Responding to Shifting Water Resources
Date Published : 01/07/2011
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