Effects of changing rainfall patterns on WSUD in Australia

Simon Beecham, Rezaul Chowdhury

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Bioretention basins and permeable pavements are two widely implemented water sensitive urban design (WSUD) technologies. While their applications are extensive, their effectiveness as a result of changes in rainfall patterns is an emerging and important research question. This paper describes how these systems behave under varying rainfall conditions in Australian cities. To illustrate this, two design parameters, namely emptying times for permeable pavements and scour velocities for bioretention systems, were investigated. The study revealed that there are two groups of cities displaying almost similar peak flow characteristics - high (Darwin, Cairns, Brisbane, Townsville and Sydney) and low (Alice Springs, Hobart, Melbourne, Perth and Adelaide). It was shown that selection of an optimal storage size to ensure appropriate emptying times for permeable pavements requires a balance between managing dry periods, reuse demand and economic considerations. Increase of high flows increases the risk of scouring in bioretention basins, which is particularly significant for the first group of cities. Finally, the paper describes the importance of peak flow estimation method and appropriate selection of modelling time step for sustainable implementation of WSUD in Australia.

Original languageEnglish
Pages (from-to)285-298
Number of pages14
JournalProceedings of the Institution of Civil Engineers: Water Management
Volume165
Issue number5
DOIs
Publication statusPublished - May 2012

Keywords

  • Mathematical modelling
  • Pavement design
  • Weather

ASJC Scopus subject areas

  • Water Science and Technology

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