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                                             29
 Findings




           and sea level rise inundation, followed by reducing the intensity of future development. While some
           of the properties already have river walls, crest heights are low. Raising crest levels is ranked higher
           than levees and land buy back, all of which mitigate risks to the road network from sea level rise,
           with the exception of road impacts around the Noosa North Shore end of the Noosa River Ferry
           landing. Tidal gates at the mouth of the Noosa River is the lowest ranked option to mitigate against
           inundation risks in this area.

3.5.8      Lake Cootharaba
           Assets at high or very high risk from storm tide and/or sea level rise inundation in this locality are the
           Boreen Point Campground and areas of National Park / conservation importance fringing the Lake.

           As there is uncertainty on the extent of built assets within conservation areas, design of hazard
           resilient infrastructure was the highest ranked option for managing sea level rise, closely followed by
           habitat migration. Major built infrastructure to reduce risks to conservation areas all rated poorly,
           including levees and tidal gates.

           At Boreen Point Campground, the option ratings for storm tide were similar, although opportunities
           to relocate important infrastructure landward ranked higher than implementation of measures such
           as seawall, levees and tidal gates.

3.5.9      Summary
           Coastal hazard adaptation options that rated favourably (albeit, many requiring further investigation)
           in the MCA process at localities within Noosa Shire are summarised in Table 3-2.

                                Table 3-2      Summary of Preferred Adaptation Options

        Locality                Potential Adaptation Options (in order of                Adaptation Hierarchy
                                preference)                                              Approach
        Peregian to Sunshine    Active dune and habitat management                       Accommodate (short term)
        Beaches                 Manual creek mouth management                            Planned transition (long term)
                                Community infrastructure management
                                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
                                Beach nourishment
                                Dune augmentation
        Noosaville              Design of hazard resilient infrastructure                Accommodate
                                Tide flaps and valves on stormwater pipe network
                                Raising road levels
                                Levees