2019-07-09 P&E Agenda - Item 10 - Attachment 1 - Coastal Hazards Risk, Vulnerability and Adaptation Assessment

Noosa Shire Council Coastal Hazard Mapping                                                              29
Erosion Prone Area Assessment




            Figure 3-5 Schematic Beach/Dune Cross Section Showing Pre and Post Erosion Dune
                Face and Dune Stability Profiles (from DECCW, 2010; after Nielsen et al., 1992)


         For the current assessment, the dune slumping component provides for the horizontal distance
         between the vertical erosion scarp and zone of reduced bearing capacity. A typical angle of repose
         of 34 degrees for dune sands, and scour level of -1m AHD, was applied to the Nielsen et al (1992)
         schema, in addition to the dune crest heights measured from the available 2016 LiDAR topography
         for each beach profile. The results of the assessment are summarised below in Table 3-5).




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