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Victoria Numerical

Location: Victoria, Australia

Type of Project: Numerical Modelling

Client: GHD, Australia

ASR Projects- Victoria Numerical

Clockwise from lower left: South-East Australia (SEA) Model grid; the Bass & Bays nested model grid; and the local area model grid. (Lower right) Output from the fine-resolution3-dimensional fully stratified simulation including freshwater river discharge in the vicinity of the Desalination Plant.

Project Overview:

ASR Ltd were chosen to undertake a series of numerical modelling studies associated with the Victorian Desalination Project. For this project, ASR developed a series of models using sequential nests to accurately simulate both large scale dynamics and fine scale features at the project study site.

Project Outcomes:

To simulate the region around Bass Strait and Tasmania, the South-East Australia (SEA) model used a 1-minute (~1 -2 km) cellsize model grid to generate tidal and non-tidal currents and sea level variations for subsequent nesting into the more detailed Bass and Bays nested model. The Bass and Bays model used an 800 m grid spacing and described the dynamics of northern Bass Strait, Port Phillip Bay and Western Port with a fully-stratified 3-dimensional model which included atmospheric heat-exchange and was also coupled to a dynamic catchment model that provided flow and loading information for 52 rivers and drains in the region. Finally, for detailed simulations at the study area, a local area grid was used. This grid was developed from high-resolution bathymetry and topography data. The local area model had the capability to resolve the fully-stratified 3-dimensional dynamics under a variety of hypothetical scenarios including brine discharge, larval and sediment transport, extreme water levels and other critical areas of concern for the desalination plant planned operation.

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