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                                      19
 Findings




3.2.2    Permanent Sea Level Rise
         The projected extent of inundation due to SLR is considered moderate across the Noosa region,
         primarily exposing land adjacent to the lower Noosa River. Based on current forecasts, and in the
         absence of an adaptation response, material impacts would be realised by 2070 and significantly
         escalate by 2100.

3.3      Phase 4: Asset Prioritisation
         A range of private and public assets within identified hazard areas were assessed according to the
         prioritisation criteria. Those prioritised for further assessment include:

         • Beaches

         • Foreshore parklands and associated infrastructure

         • Stormwater, wastewater, energy and water supply assets

         • Emergency services assets e.g. rural fire brigade, ambulance, coastguard depots

         • Transport infrastructure e.g. roads, bikeways etc.

         • Marinas, boat ramps, jetties etc.

         • Tourism facilities e.g. surf life-saving clubs, accommodation facilities

         • Environmental assets (e.g. national parks, environmental reserves)

         • Commercial properties/businesses

         • Residential properties      (multi-residential and     detached    dwellings), aggregated to   the
           neighbourhood level.

3.4      Phase 5: Risk Assessment
         A risk assessment was performed on the priority assets identified in the Phase 4 report within each
         Noosa locality. The risks described below (and summarised in Table 3-1) assume that there are no
         risk mitigation measures applied (beyond those already in place e.g. sand nourishment at Main
         Beach).

3.4.1    Open Coast
         The primary coastal hazard faced by Noosa’s open coast zone is erosion risk; based on a single
         occurrence of the modelled design storm event (100 ARI). This event has been given a likelihood
         rating of ‘unlikely’. A 100 ARI storm event would be expected to occur, on average, once every 100
         years, but could occur more or less frequently than once every 100 years and could occur during any
         given year.

         The open coast includes Peregian, Marcus, Castaways, Sunrise, Sunshine and Teewah Beaches
         which provide a mix of multi-residential tourism and residential properties as well as local service
         centres. These beaches are a drawcard for both visitors and locals for recreational purposes. The
         open coast is relatively natural in appearance, with few coastal protection measures at present.
         Existing erosion controls include maintaining vegetated dunes and the application of building coastal