Client: Parks Victoria
Commercial and recreational boating in the lower Yarra River is constrained by siltation of navigational channels. Dredging operations to remove the siltation material are also challenged by restricted access and few dredge material management options.
Assessment of a proposed dredging and material management strategy included 3-dimensional (3D) hydrodynamic and sediment transport modelling of the lower Yarra River, a stratified ‘salt-wedge’ estuarine system. The modelling represented the density gradients through the water column and the influence this has on the advection-dispersion of dredge plumes and resuspension of the bed sediments. The assessments demonstrated that lower Yarra River water quality objectives could be met during the proposal operations.
Outcomes and Benefits
This project assisted Parks Victoria with a potential strategy to address siltation issues in the lower Yarra River. The outcomes may be used to support an approvals application to undertake the proposed works.
Services and Expertise Provided:
The Brisbane River Catchment Flood Study is the most detailed and comprehensive flood study ever undertaken in Australia. The hydraulic models that were developed underwent rigorous calibration. A sophisticated Monte Carlo approach was used to hydraulically model 11,340 flooding scenarios. The result was a robust and defendable set of design events. The study was fully peer reviewed by a panel of independent experts.
Recognising rapid urban growth in the Local Government Area, Moreton Bay Regional Council has identified the need to augment the Brendale Wastewater Treatment Plant (WWTP) to account for this future growth.
A comprehensive study of the flood behaviour and flood risk of the Swan and Helena Rivers and preparation of a floodplain development strategy.
The coastal zone of Byron Shire has a history of erosion and inundation related to ocean storm tides and wave attack.