Gold Coast Seaway SmartRelease Decision Support System: Optimising recycled water release in a sub tropical estuarine environment

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Title Gold Coast Seaway SmartRelease Decision Support System: Optimising recycled water release in a sub tropical estuarine environment
Author Stuart, Gregory; Hollingsworth, A.; Thomsen, F.; Szylkarski, S.; Khan, S.; Tomlinson, Rodger Benson; Kirkpatrick, Sally; Catterall, K.; Capati, B.
Journal Name Water Science and Technology
Year Published 2009
Place of publication United Kingdom
Publisher IWA Publishing
Abstract Gold Coast Water is responsible for the management of the water, recycled water and wastewater assets of the City of the Gold Coast on Australia's east coast. Excess treated recycled water is released at the Gold Coast Seaway, a man-made channel connecting the Broadwater Estuary with the Pacific Ocean, on an outgoing tide in order for the recycled water to be dispersed before the tide changes and re-enters the Broadwater estuary. Rapid population growth has placed increasing demands on the city's recycled water release system and an investigation of the capacity of the Broadwater to assimilate a greater volume of recycled water over a longer release period was undertaken in 2007. As an outcome, Gold Coast Water was granted an extension of the existing release licence from 10.5 hours per day to 13.3 hours per day from the Coombabah wastewater treatment plant (WWTP). The Seaway SmartRelease Project has been designed to optimise the release of the recycled water from the Coombabah WWTP in order to minimise the impact to the receiving estuarine water quality and maximise the cost efficiency of pumping. In order achieve this; an optimisation study that involves intensive hydrodynamic and water quality monitoring, numerical modelling and a web-based decision support system is underway. An intensive monitoring campaign provided information on water levels, currents, winds, waves, nutrients and bacterial levels within the Broadwater. This data was then used to calibrate and verify numerical models using the MIKE by DHI suite of software. The Decision Support System will then collect continually measured data such as water levels, interact with the WWTP SCADA system, run the numerical models and provide the optimal time window to release the required amount of recycled water from the WWTP within the licence specifications.
Peer Reviewed Yes
Published Yes
Publisher URI
Alternative URI
Volume 60
Issue Number 8
Page from 2077
Page to 2084
ISSN 0273-1223
Date Accessioned 2010-03-17
Language en_AU
Research Centre Griffith Centre for Coastal Management
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Environmental Monitoring
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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