2019-12-16 GC Agenda - Item 5 - Attachment 1 - Noosa Spit Shoreline Erosion Management Plan-Part 1

 Noosa Spit SEMP Final Report                                                                v
 Contents




Figure 4-1      Example of a Trigger-Based Coastal Management Strategy (Barnes et al.
                2017)                                                                        64
Figure 4-2      Option 1a: sand plug at either end of Dog Beach                              76
Figure 4-3      Peak Flood Currents, Option 1a: sand plug at either end of Dog Beach         77
Figure 4-4      Peak Ebb Currents, Option 1a: sand plug at either end of Dog Beach           78
Figure 4-5      Option 1b: sand plug at southern end of Dog Beach                            80
Figure 4-6      Peak Flood Currents, Option 1b: sand plug at southern end of Dog Beach       81
Figure 4-7      Peak Ebb Currents, Option 1b: sand plug at southern end of Dog Beach         82
Figure 4-8      Option 2: extension of the existing training wall at Dog Beach               84
Figure 4-9      Peak Flood Currents, Option 2: extension of existing groyne                  85
Figure 4-10     Peak Ebb Currents, Option 2: extension of existing groyne                    86
Figure 4-11     Option 3: extension of submerged breakwater and two new groynes              88
Figure 4-12     Peak Flood Currents, Option 3: extension of existing submerged breakwater
                and two new groynes                                                          89
Figure 4-13     Peak Ebb Currents, Option 3: extension of existing submerged breakwater
                and two new groynes                                                          90
Figure 4-14     Option 4: three new groynes                                                  92
Figure 4-15     Peak Flood Currents, Option 4: three new groynes                             93
Figure 4-16     Peak Ebb Currents, Option 4: three new groynes                               94
Figure 4-17     Option 5: shore parallel seawall                                             96
Figure 5-1      Actions along the Risk Continuum (adapted from Fisk & Kay 2010)              98
Figure 5-2      Trigger Zones for Dog Beach Shoreline Management                            101



List of Tables
Table 2-1       Summary of Noosa River Mouth Channel Position                                 7
Table 2-2       Noosa Spit Width Measurements                                                18
Table 4-1       Summary of Management Options and Option Type                                64
Table 4-2       Rapid Assessment Criteria                                                    66
Table 4-3       Rapid Assessment of Options Results                                          67
Table 4-4       MCA Categories, Weightings and Scoring Descriptors Developed with the
                PCG                                                                          73
Table 4-5       Summary of MCA Results Developed with the PCG                                74
Table 5-1       Key Stages and Triggers for Proposed Management Actions                     100
Table 5-2       Approval Considerations for Shoreline Erosion Management Actions            102




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