Swaines Creek

flood Study

The Swaines Creek Flood Study represents an in-depth technical investigation into flooding, defining flood levels, extent and velocity for storm events of various severities up to and including the Probable Maximum Flood. It constitutes a major technical foundation from which a floodplain risk management plan can be formulated.

The Swaines Creek Flood Study involved the following activities:

  • Community consultation
    Community newsletters/questionnaires were distributed by Council in May 2012, inviting residents to provide information on historic flooding patterns. Follow up resident interviews were subsequently organised to ground-truth the results of the hydraulic model.
  • Hydraulic model development and testing
    Hydrologic modelling software and two-dimensional hydraulic modelling software were used to derive the design flood hydrographs and flood envelopes.
  • Presentation of study results
    The study results are presented as water surface profiles and indicative levels, extents of inundation as a result of various intensity storm events and the categorisation of properties into provisional hazard zones at risk during a flood.
  • Sensitivity studies and analysis
    Sensitivity studies were also carried out to assess the effects on flooding as a result of partial pipe blockages and the effects of climate change on increased rainfall intensities and sea level rise.