2021-01-18 GC - Item 3 - Attachment 2 - Phase 7 Project Summary Coastal Hazards Adaptation Plan

Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary                                        32
Conclusions and Recommendations




4       Conclusions and Recommendations
        Noosa faces impacts from a range of coastal hazards, particularly towards the latter half of the
        century. In some locations hazards are being experienced in such a way as to already represent a
        material risk. A risk assessment identified that without mitigation, increased coastal erosion is likely
        for the open coast region, having a high impact particularly on privately-owned assets, as well as
        Council coastal infrastructure (e.g. roads and recreational areas) and the beaches themselves. Areas
        along the Noosa River (Noosa Heads, Tewantin, and in particular Noosaville and Noosa North Shore)
        will be increasingly at risk due to inundation associated with rising sea levels. In this instance, the
        greatest level of exposure and impacts are expected to be felt by Council infrastructure (e.g.
        stormwater networks, open space, roads), some private property, as well as indirect consequences
        for adjacent retail and commercial operations.

        A summary of the potential coastal hazard mitigation measures for consideration and further
        investigation prior to inclusion in the Coastal Hazards Adaptation Plan is provided below. The
        majority of these options were then analysed further through a Cost-Benefit Analysis. It’s important
        to note there are a range of factors Council must consider beyond the findings of a CBA (i.e. as
        expressed in financial terms) when determining which hazard mitigation measures to include in the
        plan.

         Locality               Recommended Adaptation Options                     Recommended Adaptation
                                                                                   Hierarchy Approach
         Peregian to Sunshine   Active dune and habitat management                 Accommodate (short term)
         Beaches                Manual creek mouth management                      Planned transition (long
                                Community infrastructure management                term)
                                Land buy back
                                Relocate important infrastructure
                                Beach nourishment
                                Dune augmentation
         Noosa Heads            Design of hazard resilient infrastructure          Accommodate
                                Tide flaps and valves on stormwater pipe network
                                Active dune and habitat management
                                Dune augmentation
                                Improve sand shifter efficiency
         Teewah                 Active dune and habitat management                 Accommodate
                                Acquisition of properties affected by coastal
                                erosion in 2070, and conversion of affected
                                properties to public open spaces
                                Beach nourishment
                                Dune augmentation
         Noosaville             Design of hazard resilient infrastructure          Accommodate
                                Tide flaps and valves on stormwater pipe network
                                Raising road levels
                                Levees
         Tewantin               Design of hazard resilient infrastructure          Prepare/Accommodate
                                Tide flaps and valves on stormwater pipe network