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

Noosa Spit SEMP Final Report                                                                                       100
Proposed Implementation Pathway




                       Table 5-1    Key Stages and Triggers for Proposed Management Actions

 Stage 1                    Period of Acceptable Risk
 Resilience building        Implement and/or continue ‘no regrets’ actions, namely:
 actions                    • Review/update erosion studies; investigate funding sources for works; community
                            education and consultation; dune and habitat management; beach access management.
 Shoreline monitoring to    Continue monitoring program through upper beach surveys, hydrographic surveys, aerial
 define current condition   imagery analysis and modelling.
 and understand trends
 Develop a response         Develop a response plan including:
 plan (i.e. the SEMP)       • Evaluate risk reduction options
                            • Concept planning for preferred option(s)
                            • Seek agency support
 Define triggers for        Commence planning for next stages of risk management:
 enhanced                   • Trigger 1: limited recreational beach width and loss of vegetation, progress to Stage 2
 management action          management
                            • Trigger 2: the width of vegetated land above HAT has narrowed to 20 m (or less),
                            progress to Stage 3 management.
 Stage 2                    Risk Approaching Unacceptability
 Trigger 1 is reached       The first trigger for enhanced management action is realised, namely:
                            • Limited recreational beach width at Dog Beach and loss of vegetation
 Risk reduction             Develop and implement risk reduction measure:
 management action:         • Beach nourishment/sand plug concept design and approvals
 beach
 nourishment/sand plug      • Detailed design and construction of beach nourishment/sand plugs
 construction               • Monitor shoreline and repeat works when Trigger 1 is reached (estimated every 5 years)

 Shoreline monitoring to    Continue monitoring program to quantify the benefit of Stage 2 management actions.
 define current condition
 and understand trends
 Ongoing resilience         Continue ‘no regrets’ actions, namely:
 building actions           • Review/update erosion studies; investigate funding sources for works; community
                            education and consultation; dune and habitat management; beach access management.
 Review/update              Review response plan and consider the need for an enhanced or alternative management
 response plan              approach.
 Stage 3                    Unacceptable Risk
 Trigger 2 is reached       The second trigger for enhanced management action is realised, namely:
                            • The frequency of beach nourishment/sand plug renewal is unsustainable; and/or
                            • The width of vegetated land above HAT has narrowed to 20 m (or less)
 Risk reduction             Consider the development and implementation of the following risk reduction measures:
 management action:         • Seawall concept design and approvals
 seawall
                            • Seawall detailed design and construction
 Shoreline and seawall      Continue monitoring program through upper beach surveys; inspect condition of seawall.
 monitoring
 Ongoing resilience         Continue ‘no regrets’ and permitted activities, namely:
 building actions           • Community education and consultation; habitat management; beach access
                            management; beach nourishment (if considered viable).




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