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Bass Strait Hydro

Location: Bass Strait, Victoria, Australia

Type of Project: Hydrodynamic Model

Client: GHD, Australia

ASR Projects- Bass Strait Hydro

The SEA model domain showing currents through Bass Strait generated by low-frequency oscillations and wind.

Project Overview:

In order to accurately simulate low-frequency oscillations associated with shelf and coastal trapped waves in upper Bass Strait, ASR Ltd developed the South-East Australia (SEA) model.

Project Outcomes:

The SEA model incorporates tidal and non-tidal sea level oscillations from tidal constituents and measured residual sea level oscillations at Portland, Victoria to describe tidal and low-frequency sea level variations across Bass Strait. Because the model is aided by QuikSCAT satellite sensed wind data, it is also is useful for determining wind-driven currents. The model is intended to be used to generate boundary conditions for use in finer-resolution nested hydrodynamic models of Victorian coastal locations. The SEA model was calibrated and validated over the years 2004, 2005 and 2008. Coastal-trapped wave signals observed at Portland are accurately propagated through Bass Strait and validated to measurements at Lorne and Stony Point. To date, the SEA model has been used to examine volume fluxes, flushing, and larval transport through Bass Strait. The SEA model is an excellent source for determining hydrodynamic boundary conditions necessary for future investigations at any open ocean locations in Victoria or Tasmania.

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