2021-01-18 GC - Item 3 - Attachment 1 - Coastal Hazards Adaptation Plan for Community Consultation

Risks – 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 8 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 2). 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 Risk 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 8 - 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 (community consultation version)               Page 45