Maryborough Flood Study

The Maryborough Flood Study aimed to assess and develop options to mitigate flood risks in the Maryborough township and Four Mile Creek catchment. This study utilised hydrologic and hydraulic models validated to historical flood events from January 2011 and December 1999. The study modelled a wide range of design flood events, including various storm durations and climate change scenarios, to ensure comprehensive flood mapping and risk analysis. Sensitivity tests were conducted for factors such as roughness changes, blockage, and downstream boundary conditions, ensuring the models accounted for variable flood behaviors.

Several flood mitigation options were explored, starting with preliminary assessments to gauge their potential effectiveness in reducing flood risks, followed by more detailed evaluations of feasibility, including cost analysis and benefit assessments. The study recommended that the council consider implementing one of the modeled strategies while emphasizing the importance of flood intelligence outputs and early warning systems for effective disaster management.

To support long-term flood resilience, draft planning layers were developed, with a recommendation for integration into the local planning scheme to ensure flood risk considerations are reflected in future development decisions.