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

TEWANTIN
Setting
Tewantin is a small riverside town strongly influenced by its heritage and riverside setting and
framed by national park. It is an important gateway to the Noosa River, hinterland areas and Noosa
North Shore. Tewantin town centre provides a wide range of commercial, retail, civic and
community activities, local employment, parks and sporting facilities.

The areas of Tewantin that are exposed to inundation include parks and natural areas on low-lying
land adjacent to the Noosa River and Lake Doonella, as well as Sheep, Goat, and Makepeace
Islands.

Risks to Tewantin
The topography of Tewantin rises enough in many areas to put public and private assets beyond
the projected tidal inundated area. However, there are risks to low-lying recreational parks such as
the Tewantin water park and skate park, the Noosa Marina and associated vehicle parking areas,
the boat ramp, and low lying areas surrounding and approaching the Noosa North Shore Ferry
crossing.

Appendix 34 shows the change in risk profile across various parts of Tewantin as the area exposed
to the effects of periodic tidal inundation increases over time. Table 20 provides a summary of the
changing risk profile for six broad asset types within the locality that are projected to be exposed to
the effects of periodic tidal inundation between present day and 2100.

Frequent tidal inundation is very likely to present risks to sections of the stormwater network and
road network, including Moorindil Street leading up to the ferry, and the eastern approach to
Doonella Bridge. The tourism and commercial businesses associated with Noosa Marina, as well
as the accommodation on Makepeace Island, are also expected to be at risk without intervention.
Some existing vegetation communities along natural foreshore locations and Sheep and Goat
Island are at risk, however, it is likely that these will naturally transition to more saltwater tolerant
species.

          Asset Type                              Inundation risk by year
                              Present Day             2040                 2070                   2100
          Tourism                 Low                Medium                          High
          Business                 Low               Medium                          High
          Residential                        Low                                     High
          Infrastructure           Low               Medium                High             Very High
          Recreational             Low               Medium                High             Very High
          Natural                  Low               Medium                          High
                     Table 20 - Change in Tewantin asset risk profiles across planning horizons


The existing methods for mitigating inundation risks in Noosaville Tewantin are:

    -   Planning and land use regulations are in place including minimum floor heights for new
        buildings
    -   A small number of revetment walls along the Noosa River shoreline, primarily in and
        adjacent to Noosa Marina.




Noosa Council – Coastal Hazards Adaptation Plan 2020 - 2030                                              Page 64