Location: Victoria, Australia
Type of Project: Numerical Modelling
Client: GHD, Australia
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.
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.
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.« Download Project PDF