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

Noosa Shire Council Coastal Hazard Mapping                                        II
Contents




Contents
Executive Summary                                                                 i
1     Background                                                                 1
      1.1    Noosa Shire Climate Change Adaptation Plan                           1
      1.2    QCoast2100 Program                                                   1
      1.3    Coastal Hazard Adaptation Plan Scoping Study                         2
2     Storm Tide Hazard Assessment                                               4
      2.1    Background                                                           4
      2.2    Open Coast & Lower Noosa River Storm Tide Inundation                 5
             2.2.1     Open Coast Storm Tide Assessment                           6
             2.2.2     Lower Noosa River Storm Tide Assessment                    7
      2.3    Coincident Catchment Flooding & Storm Tide                           8
3     Erosion Prone Area Assessment                                              9
      3.1    Background                                                           9
             3.1.1     Erosion Prone Area Definition & Mapping                    9
      3.2    Calculated Erosion Distance Assessment                              10
             3.2.1     Open Coast Calculated Erosion Distance Formula            10
             3.2.1.1   Application of the Calculated Erosion Distance Formula    13
      3.3    Planning Period (N)                                                 14
      3.4    Rate of Long Term Erosion (R)                                       14
      3.5    Storm Erosion (C)                                                   17
             3.5.1     Design Event Erosion Assessment                           17
             3.5.1.1   Background Information and Datasets                       17
             3.5.1.2   Design Erosion Events Modelling Results                   18
             3.5.1.3   Wave Runup & Overtopping Potential                        21
      3.6    Shoreline Response to Sea Level Rise (S)                            23
             3.6.1     Background Information                                    23
             3.6.2     Equilibrium Profile (Bruun Rule) Concept                  23
             3.6.3     Shoreline Response to Sea Level Rise Assessment Results   25
      3.7    Factor of Safety (F)                                                28
      3.8    Dune Slumping (D)                                                   28
      3.9    Assessment Results                                                  31
4     Permanent Inundation due to Sea Level Rise                                 33
      4.1    Hazard Assessment Approach                                          33



G:\Admin\B22613.g.mpb.Noosa_CHAS\R.B22613.002.04.NSC_CHAP_Mapping.docx