Coastal Hazard Assessment · MCU25/0087

                                                                   17 The Esplanade, Sunshine Beach                                                       Report


Table of Contents
1   INTRODUCTION............................................................................................................................................ 1
2   Site description............................................................................................................................................... 2
    2.1 Development Proposal .......................................................................................................................... 2
    2.2 Site Inspection ....................................................................................................................................... 2
    2.3 Survey ................................................................................................................................................... 9
    2.3.1       Dune Toe .......................................................................................................................................... 9
    2.4 Geotechnical Investigation .................................................................................................................... 9
3   Historical aerial photography assessment.................................................................................................... 11
    3.1 Satellite Imagery .................................................................................................................................. 15
4   Coastal Processes ....................................................................................................................................... 18
    4.1 Tides and Storm Tide .......................................................................................................................... 18
    4.1.1       Astronomical Tides .......................................................................................................................... 18
    4.1.2       Sea Level Rise ................................................................................................................................ 18
    4.1.3       Storm Tide....................................................................................................................................... 18
    4.2 Wave Climate ...................................................................................................................................... 19
    4.3 Sediment Transport ............................................................................................................................. 20
5   Erosion Prone Area ...................................................................................................................................... 21
    5.1 Erosion Prone Area Assumptions ........................................................................................................ 21
    5.2 Erosion Prone Area Reassessment..................................................................................................... 22
    5.2.1       Long-term Erosion (N x R) .............................................................................................................. 22
    5.2.2       Short-term Erosion (C) .................................................................................................................... 23
    5.2.3       Recession due to Sea Level Rise (S) .............................................................................................. 27
    5.2.4       Dune Slumping (D).......................................................................................................................... 28
    5.2.5       Summary of the Erosion Prone Area Reassessment ...................................................................... 29
    5.3 Comparison to BMT (2018) Assessment ............................................................................................. 31
    5.3.1       Beach Profile ................................................................................................................................... 31
    5.3.2       Depth of Closure ............................................................................................................................. 32
    5.3.3       Dune of Toe .................................................................................................................................... 32
    5.3.4       Active beach width and height......................................................................................................... 32
    5.3.5       Dune height ..................................................................................................................................... 32
    5.3.6       Sediment size.................................................................................................................................. 33
    5.3.7       Storm Tide....................................................................................................................................... 33
    5.3.8       Wave Height .................................................................................................................................... 34
    5.3.9       Long-term erosion ........................................................................................................................... 34
    5.3.10          Short-term erosion ...................................................................................................................... 34



                                                                                               252662-MN-RP-CO-0001B | 10 November 2025 | Page ii