ECM_22343537_v1_Coastal Hazard Assessment · 132000.200173.1

                                                             Internal use only




              Table 7 Summary of Dune Scarp
                                        Design Event           Dune Scarp (m)            Dune Slumping (m)
                                        100-year ARI Event     2.5                       1.15
                                        Extreme Event          4.2                       2.1



              6.1.5       Summary of the Erosion Prone Area Reassessment
              The erosion prone area reassessment for this appeal has been undertaken in accordance with the
              Department of Environment and Heritage Protection (2013) requirements with a planning period of 100
              years to accommodate the asset lifespan of the proposed house. We have also considered the effect of
              shoreline recession due to 0.8 metres of sea level rise, short-term erosion associated with a 100-year ARI
              storm event and dune scarp recession.

              The site-specific erosion prone area calculated for the site is 90 metres measured from the seaward toe of
              the frontal dune. The components of the erosion prone area for 2 Arakoon Crescent, Sunshine Beach are
              presented in Table 8 and the spatial extents are shown in Figure 23.
              Table 8 Reassessed Erosion Prone Area for 2 Arakoon Crescent, Sunshine Beach
                                   Erosion Prone Area Component           100- year ARI Event    Extreme Event

                                   Long-term Erosion (m)                           0                  0

                                   Short-term Erosion (m)                         22                  47

                                   Recession due to 0.8m SLR (m)                  13                  13

                                   Safety Factor                                  1.4                 1.4

                                   Dune scarp slumping (m)                        1.15                2.1

                                   Erosion prone area Width (m)                   50                  90




              13 February 2023         2 ARAKOON CRESCENT, SUNSHINE BEACH                                    PA3303   31


Document Set ID: 22343537
Version: 1, Version Date: 16/03/2023