Inundation Mapping

Sea level rise and other potential changes to the climate will substantially exacerbate existing problems of oceanic inundation during extreme storms events and introduce new inundation problems at some places presently not affected.

Large tracts of developed land along the cost will become vulnerable to inundation will be exposed to additional damage by wave run-up and overtopping of the coastal dunes.

Prediction of those vulnerable areas requires both good data on the levels of the land and where the development does or may potentially exist and a proper technical evaluation of the storm tide and wave penetration to those areas.  BMT WBM undertakes comprehensive modelling of the processes involved and combines that with GIS evaluation of land levels and vulnerability.

Recent Relevant Projects

Cardwell Inundation Study (Queensland)

BMT WBM undertook a combined flooding and storm surge inundation study for Cardwell, funded by the council and state and federal governments.  The scope included modelling and mapping of inundation caused by freshwater flooding and storm surge, examination and mapping of community vulnerability and risk associated with inundation events and examination of mitigation strategies to reduce these risks.  It involved storm surge modelling of theWestern Coral Seato simulate the effect of cyclonic winds and pressure on sea levels and currents as well as wave generation and propagation modelling.  This formed the basis of a comprehensive storm surge risk assessment for Cardwell Shire.

National Coastal Vulnerability Assessment – Kakadu National Park (NT)

BMT WBM was selected by the Australian Government Department of Climate Change (DCC) to undertake a climate change coastal vulnerability assessment for Kakadu National Park. The study identified critical climate change impacts on the low-lying coastal wetlands of national and world heritage significance. The study involved application of state-of-the-art hydrodynamic modelling and catchment modelling of the South Alligator River system to test the scale of impacts associated with the risk of flood discharge, salt water inundation, tidal surges and extreme climate events such as cyclones. Based on the results of the modelling, a desktop assessment of potential impacts and risks of predicted climate change scenarios on wetland ecosystems was then conducted in order to determine risks to ecological, cultural and socio-economic values of the South Alligator River system.