Emulating pre-urban initial rainfall losses and restoring baseflow with rainwater harvesting

Paper


Taylor, B. A.. 2012. "Emulating pre-urban initial rainfall losses and restoring baseflow with rainwater harvesting." Wong, Tony and McCarthy, Dave (ed.) 7th International Conference on Water Sensitive Urban Design (WSUD 2012): Water Sensitive Urban Design: Building the Water Sensitive Community. Melbourne, Australia 21 - 23 Feb 2012 Canberra, Australia.
Paper/Presentation Title

Emulating pre-urban initial rainfall losses and restoring baseflow with rainwater harvesting

Presentation TypePaper
Authors
AuthorTaylor, B. A.
EditorsWong, Tony and McCarthy, Dave
Journal or Proceedings TitleProceedings of the 7th International Conference on Water Sensitive Urban Design (WSUD 2012)
ERA Conference ID43579
Number of Pages10
Year2012
Place of PublicationCanberra, Australia
ISBN9780858258952
Web Address (URL) of Paperhttp://www.waterforliveability.org.au/wsud/papers.php
Conference/Event7th International Conference on Water Sensitive Urban Design (WSUD 2012): Water Sensitive Urban Design: Building the Water Sensitive Community
International Conference on Water Sensitive Urban Design
Event Details
International Conference on Water Sensitive Urban Design
Rank
B
B
Event Details
7th International Conference on Water Sensitive Urban Design (WSUD 2012): Water Sensitive Urban Design: Building the Water Sensitive Community
Event Date
21 to end of 23 Feb 2012
Event Location
Melbourne, Australia
Abstract

The ability of rainwater systems to emulate pre-urban initial rainfall losses and restore catchment baseflow is investigated in Brisbane, Canberra and Melbourne, using low, medium and high rainwater demand scenarios, and adopting three 5 kL rainwater system configurations of: 1) Conventional; 2) Leaking - a fixed 1.25 kL leaking compartment; and 3) Adaptive rainwater diversion (ARD) - a variable leaking compartment responding to change in rainfall and rainwater demand. Baseflow is restored by leaking rainwater at the rate of 240 L/day. Storm initial loss is the sum of rainfall from the start of an event until the tank overflows. Results show the ARD system provides superior initial loss emulation, reduced mean annual overflow and increased baseflow, under the low demand scenario. Leaking and ARD systems provide similar results under the high demand scenario. However, the ARD system is recommended as rainwater demand can change with occupant water use habits. These stormwater management outcomes can potentially create an avenue for retrofitting WSUD in urban catchments and improving urban stream health, without duplicating or redesigning municipal services, and while maintaining an alternate water supply.

Keywordsrainwater diversion; WSUD retrofit; urban water security; urban stream health; urban hydrology
ANZSRC Field of Research 2020410406. Natural resource management
330105. Architectural science and technology
400513. Water resources engineering
Public Notes

© 2012 Engineers Australia. Accepted version deposited in accordance with the copyright policy of the publisher.

Byline AffiliationsAustralian Centre for Sustainable Catchments
Institution of OriginUniversity of Southern Queensland
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