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In 2000 the Trust engaged Associate Professor George
Kuczera of the University of Newcastle, his colleague Peter Coombes
and Parramatta-based consulting engineer Dr Geoff O'Loughlin to
determine how much of the volume of a rainwater tank, whose water
is used for non-potable purposes, can be included in the site's
OSD storage, without compromising the OSD system's flood mitigation
performance.
The investigation involved generating a 1000-year
rainfall record at six-minute intervals for the upper Parramatta
River catchment. The record has been applied to a computer model
of water usage on individual properties to simulate the performance
over 1000 years of different combinations of OSD-only, rainwater
tank only and combined systems.
Impact
of Rainwater Tank and On-site Detention Options on Stormwater Management
in the Upper Parramatta River Catchment (August 2001):
(2.16 MB) Authors Peter Coombes, Andrew Frost and George Kuczera.
The principal objective of this study is to determine by how much
do rainwater tanks reduce the amount of on-site stormwater detention
(OSD) storage required to satisfy Upper Parramatta River Catchment
Trust's (UPRCT) policy.
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