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                                         21
 Findings




         was used to formalise Noosa Woods and assist in protecting Noosa Sound from direct wave impacts.
         A rock groyne was constructed in 1983 midway along the beach and sand nourishment occurs
         episodically, mainly using sand ‘recycled’ from the western end of Main Beach (Noosa Woods) via
         the permanent sand shifter, which was commissioned around 2012.

         Despite these measures, the risk level for Noosa Main Beach (and the existing seawall) is already
         assessed as High, and the frequency and magnitude of erosion events will likely increase over time
         with sea level rise. There is also a High risk posed to the sand shifter in its current position by 2040,
         which is considered critical infrastructure for Council to maintain sand on Main Beach. Whilst the
         main building is structurally expected to withstand such an event, it is likely to be inoperable for up
         to six months depending on level of damage to ancillary components and any accessibility
         constraints.

         Similarly, the risk level to properties in Hastings Street from erosion (most properties on the foreshore
         side of Hasting Street) is already Very High and will remain so without the application of further
         mitigation measures.

         Permanent sea level rise is estimated to pose a High risk to Noosa Drive (the sole vehicular access
         to Hastings Street and the main visitor gateway to Noosa National Park) by 2100. This risk is high
         largely because of the potential loss of access to Hastings Street and the high likelihood of the impact
         occurring. Permanent sea level rise also poses a Very High risk to the southern section of the Noosa
         Spit Recreational Reserve (also known as Dog Beach); this is ranked highly because of the increased
         potential for breakthrough to Noosa Sound. Erosion may also have a High impact on infrastructure
         within the southern end of the reserve such as dune vegetation, car park areas and public amenities.

3.4.3    Noosaville
         Noosaville offers a mix of tourist accommodation and residential properties, with a high use retail
         centre along Gympie Terrace. The foreshore parklands bordering the Noosa River are popular with
         both tourists and locals and offers a range of recreational facilities including walking/running, biking,
         playgrounds, tennis courts etc. A large number of jetties and pontoons (including the Noosa Yacht
         Club) have been built along the River to moor vessels, as well as offer water sports, and these are a
         fundamental contributor to the lifestyle offered by this area. The waterways in and around Noosaville
         also contain a number of Conservation Parks (i.e. Keyser Island, Weyba Creek Conservation Parks)
         which have high environmental value.

         The primary hazards for Noosaville are permanent tidal inundation and storm tide inundation, as
         there are varying forms of riverwalls along the Noosa River that provide some protection from
         streambank erosion. The Noosa Shire Planning Scheme also sets floor levels for buildings that are
         within the flood hazard area, providing a level of protection to properties from storm tide inundation
         or permanent sea level rise. Therefore, immediate impacts are largely limited to risks associated with
         inundation of critical underground infrastructure and the road and pedestrian network – that is,
         service provision and accessibility. Longer term risks may stem from impacts associated with a
         gradual decline in the amenity and liveability (real or perceived) of some neighbourhoods and public
         areas (e.g. foreshore parks).

         Storm tide inundation is expected to become a High or Very High risk at a number of locations or
         assets by 2070 or 2100. These locations include: