Coastal Inundation Modelling (Bath-tub Approach)

In 2008, Grace GIS contributed to the Cooperative Research Centre for Spatial Information (CRCSI) by undertaking high-resolution coastal inundation modelling for Sydney’s Botany Bay. Using a detailed LiDAR-derived elevation model, we simulated sea-level rise scenarios through the bath-tub approach, generating inundation extents at 10-centimetre increments to visualise potential impacts under varying water levels.

These finely stepped inundation layers revealed vulnerable coastal zones, low-lying infrastructure, and potential pathways for tidal intrusion. The outputs provided CRCSI and its partners with a clear, data-driven basis for understanding coastal hazard exposure, supporting early climate adaptation studies, strategic planning, and risk mitigation across one of Australia’s most significant urban coastal environments.