A decision support system for water management in Thomson Reservoir, Victoria

R. Mills, Clelia Marti, Peter Yeates, S. Haydon, Jorg Imberger

Research output: Chapter in Book/Conference paperConference paperpeer-review

3 Citations (Scopus)

Abstract

The Aquatic Real-time Management System (ARMS), which incorporates data acquisition, data visualization and, 3D hydrodynamic modelling was used to optimise field sampling and run scenario forecasting as part of a comprehensive limnological study of Thomson Reservoir, the largest storage in the Melbourne Water supply system (Victoria, Australia). The 3D Estuary, Lake and Coastal Ocean Model (ELCOM) was coupled with ARMS to support operational and planning decisions over short and long timescales. The system can address, in particular, key issues related to: • Melbourne Water's drought management policy • Environmental flows • Management of the overall supply system Part of the drought management policy requires allowing the Thomson Reservoir to re-fill over a projected period of 8 to 10 years by lowering abstraction from the reservoir as a metropolitan desalination plant comes online. Construction of the desalination plant is due to begin in mid-2009 and finish at the end of 2011 and will yield an estimated 150 GL per year. The constant addition of a large volume of desalination water into the current supply network will significantly alter the way the supply network is utilised, having impacts on individual reservoirs. ARMS allows the end-user to view reservoir data in real-time, and investigate management strategies through scenario forecasting of alternative operating regimes under changing reservoir conditions during drought. Building the ARMS for Thomson Reservoir included ELCOM calibration and validation against Lake Diagnostic System (LDS) data and profiles obtained during an intensive 4-day field sampling campaign. ELCOM can be dynamically coupled with the Computational Aquatic Ecosystem Dynamics Model (CAEDYM), a process-based ecological model that simulated the key biogeochemical processes influencing water quality. CAEDYM was not used in this study. ELCOM has previously been configured for Cardinia, Sugarloaf, Silvan and Upper Yarra reservoirs in the Melbourne supply system, and ELCOM-CAEDYM modelling is proposed for Greenvale Reservoir this year. Once these reservoirs are integrated into ARMS the system could be applied as a system-scale monitoring and management tool that has the capacity to balance key stakeholder, environmental and economic interests through better real-time knowledge and management scenario forecasting. © MODSIM 2009.All rights reserved.
Original languageEnglish
Title of host publication18th IMACS World Congress - MODSIM09 International Congress on Modelling and Simulation
EditorsR.S. Anderssen, R.D. Braddock, L.T.H. Newham
Place of PublicationAustralia
PublisherModelling and Simulation Society of Australia and New Zealand Inc.
Pages3259-3265
Volume1
EditionCairns, Australia
ISBN (Print)9780975840078
Publication statusPublished - 2009
Event18th World IMACS Congress and International Congress on Modelling and Simulation: Interfacing Modelling and Simulation with Mathematical and Computational Sciences, MODSIM 2009 - Cairns, Australia
Duration: 13 Jul 200917 Jul 2009

Conference

Conference18th World IMACS Congress and International Congress on Modelling and Simulation: Interfacing Modelling and Simulation with Mathematical and Computational Sciences, MODSIM 2009
Country/TerritoryAustralia
CityCairns
Period13/07/0917/07/09

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