2021-10-08 SM - Item 1 - Attachment 2 - Draft Coastal Hazards Adaptation Plan - tracked changes

Inundation Rrisks to Noosa North Shore– Inundation

The main coastal hazard risk of concern for Noosa North Shore is periodic tidal inundation, both
from low frequency-high magnitude (i.e. depth and extent) storm tide events, and high frequency-
low magnitude. Table 13 shows those asset types within this locality that are projected to be
exposed to the effects of tidal inundation between present day and 2100 (map versions available in
Appendix 3). Whilst there has been very limited and low intensity development to date, a significant
proportion of the development is private dwellings located along the shores of the Noosa River.
This area is prone to flooding and inundation events today, and these hazards are projected to
increase in severity and frequency over the life of this plan. There are limited publicly-owned
assets in this locality, consisting primarily of unsealed road network, with little expansion of
development areas anticipated.

         Asset Type                        Tidal Inundation Risks by Year
                             Present Day              2040               2070                2100
         Tourism                                                Low
         Business                                               Low
         Residential              Low                 High                      Very High
         Infrastructure           Low                 High                      Very High
         Recreational                                           Low
         Natural                  Low               Medium                         High
          Table 13 - Change in Noosa North Shore asset inundation risk profiles across planning horizons


At present, the only methods for mitigating the erosion and inundation risks in Lower Noosa North
Shore are:

   -   Existing vegetated dune areas, which act as a natural buffer to erosion by dispersing wave
       energy during storm events
   -   Planning and land use regulations are in place to control further land subdivision, and
       building floor heights for new buildings
   -   Major portion of Noosa North is designated for conservation.




Noosa Council – Coastal Hazards Adaptation Plan 2020 - 2030                                                Page 51