Reference Document - Coastal Hazard Assessment - MCU24 0094 · MCU24/0094

                                33 Ross Crescent, Sunshine Beach – Coastal Hazzard Assessment | 33 Ross Crescent Family Trust



toe of the frontal dune (refer Section 2.3) to the base of the erosion scarp predicted by Vellinga (1983). As
discussed above in Section 2.3 the current toe of frontal dune is 2.3m AHD which is higher than the design
water levels assessed.

The average of the short-term erosion values for ETA596, site and ETA602 profiles provides a
representative short-term erosion value for this compartment spanning 2.5km of Sunshine Beach.

Table 6-3 presents the predicted short-term erosion associated with the 100-year ARI design storm event
for the three profiles. This shows an average storm erosion cut of 20m is predicted to occur for this section
of Sunshine Beach. The storm erosion profiles associated with a 1.19m AHD storm tide for, ETA 596, 33
Ross Crescent, and ETA 602, is shown in Figure 6-2, Figure 6-3 and Figure 6-4 respectively.

TABLE 6.3: PREDICTED SHORT-TERM EROSION - SUNSHINE BEACH
 Profile                                      Short-term Erosion (m)
                                 RHDHV (2024)                        M&N (2025)
 ETA 596                          15 (nominal)                      15 (nominal)
 33 Ross Crescent                        20                                21
 ETA 602                                 20                                22
 Average (rounded up)                    19                                20




Figure 6-2 storm profile (Vellinga, 1983) at ETA596 for a 1.79m AHD storm tide level




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