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

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Table of Contents
Document Verification ..................................................................................................................................................................... i
Table of Contents............................................................................................................................................................................ ii
List of Figures ................................................................................................................................................................................ iv
List of Tables ................................................................................................................................................................................... v
Disclaimer ....................................................................................................................................................................................... vi
1.      Introduction......................................................................................................................................................................... 1
2.      Site Description .................................................................................................................................................................. 2
2.1. Development Proposal ......................................................................................................................................................... 2
2.2. Site Inspection ...................................................................................................................................................................... 2
2.3. Survey .................................................................................................................................................................................. 3
2.4. Dune Toe .............................................................................................................................................................................. 3
2.5. Geotechnical Investigations.................................................................................................................................................. 3
3.      Historical Aerial Photograph Analysis ............................................................................................................................. 4
3.1. Satellite Imagery ................................................................................................................................................................... 8
4.      Planning Framework ........................................................................................................................................................ 11
4.1. Planning Act 2016 .............................................................................................................................................................. 11
4.1.1. Coastal Management Mapping........................................................................................................................................... 11
4.2. Noosa Plan 2020 ................................................................................................................................................................ 12
4.2.1. Further Advice .................................................................................................................................................................... 13
5.      Coastal Processes............................................................................................................................................................ 14
5.1. Tides and Storm Tide ......................................................................................................................................................... 14
5.1.1. Astronomical Tide ............................................................................................................................................................... 14
5.1.2. Sea Level Rise ................................................................................................................................................................... 14
5.1.3. Storm Tide .......................................................................................................................................................................... 14
5.2. Wave Climate ..................................................................................................................................................................... 15
5.3. Sediment Transport ............................................................................................................................................................ 17
6.      Erosion Prone Area .......................................................................................................................................................... 18
6.1. Erosion Prone Area Assumptions....................................................................................................................................... 18
6.2. Erosion Prone Area Reassessment ................................................................................................................................... 19
6.2.1. Long-term Erosion (N x R).................................................................................................................................................. 19
6.3. Short-term Erosion (C) ....................................................................................................................................................... 20
6.3.1. Recession due to Sea Level Rise (S) ................................................................................................................................. 23
6.3.2. Recession due to Sea Level Rise (S) ................................................................................................................................. 25
6.3.3. Dune Height ....................................................................................................................................................................... 25
6.3.4. Summary of the Erosion Prone Area Reassessment ......................................................................................................... 26
6.4. Comparison to BMT (2018) Assessment............................................................................................................................ 28
6.4.1. Beach Profile ...................................................................................................................................................................... 29
6.4.2. Depth of closure ................................................................................................................................................................. 30
6.4.3. Dune Toe ............................................................................................................................................................................ 30
6.4.4. Active beach width ............................................................................................................................................................. 30
6.4.5. Dune height ........................................................................................................................................................................ 30
6.4.6. Sediment size ..................................................................................................................................................................... 31




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