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                                        27
 Findings




         nourishment/dune augmentation. Upgrading to extend the bridge, seawalls and road relocation were
         the lowest ranked options for this site.

         The Sunshine Beach SLSC, community parkland, beachfront residential properties and associated
         roads and utilities are at high to very high risk from erosion impacts along Sunrise and Sunshine
         Beaches. Continued maintenance of the dune system and manual creek mouth management both
         ranked highly for this area, followed by beach nourishment/dune augmentation and buy back of
         residential land parcels. Due to the intensity of existing development, avoid measures ranked poorly
         due to their limited effectiveness. Seawalls in general but especially those on private land to protect
         private residential assets also rated very poorly, largely due to the limited technical viability of the
         option (high dune heights and infrastructure close to seaward property boundaries).

3.5.2    Teewah
         Noosa North Shore Campground, the Teewah residential area and associated access are at high
         risk to erosion. The highest ranked options for this area were active management of the beach and
         dune (and complementary measures), community infrastructure management and design resilient
         public infrastructure (where present). Buy back and beach nourishment were ranked lower, largely
         due to their significant costs. Seawalls again rated poorly due to the high dune heights in the area
         and the technical infeasibility of that option.

3.5.3    Noosa Heads (Erosion)
         Noosa Heads is exposed to erosion from the open coast as well as inundation hazards via the Noosa
         River frontage.

         Noosa Main Beach is already exposed to very high erosion risks, existing risk treatments include a
         seawall to protect landward infrastructure and a permanent sand shifter system to rapidly reinstate
         the recreational beach following severe erosion. Further options have been considered to limit
         erosion of the recreational beach as well as provide additional protection to tourist, commercial and
         community infrastructure. Noosa Woods Beach lies north of Noosa Main Beach but is backed by a
         well-vegetated dune system containing limited public infrastructure, except for infrastructure to
         support operation of the sand shifter and access roads. Dog Beach, within the Noosa River, is subject
         to erosion hazards as a result of channel migration.

         For Noosa Main Beach, hazard resilient design for new or upgraded private infrastructure ranked
         highest on the options, while dune augmentation was highest for Noosa Woods Beach and Dog
         Beach. The density of development landward of Noosa Main Beach limits the implementation,
         economic viability and political acceptance of many options to reduce asset exposure. Improving the
         efficacy of the sand shifter rated higher than upgrading the existing seawall. Options to reduce the
         intensity of existing development and protective structures such as groynes and breakwaters all rated
         poorly, largely due to costs and social impacts.

3.5.4    Noosa Heads (Inundation)
         High and very high risks associated with inundation impact on the Noosa River frontage of Noosa
         Heads. For the highly developed tourist area around Noosa Parade to Noosa Drive where risks are
         associated with sea level rise hazards, hazard resilient design for infrastructure rated highly, along