2021-11-15 GC Agenda - Item 7 - Attachment 2 - Coastal Hazards Adaptation Plan with tracked changes

Adaptation outcomes and associated actions for Tewantin

The assessment of inundation risks to Tewantin show the level of risk across all asset types in
areas adjacent to the Noosa River will very likely become intolerable within 50 years.

Analysis of socio-economic, environmental, and governance considerations, as well as community
input received throughout the CHAP’s development, indicate the most appropriate adaptation
pathway for responding to inundation risks in this locality is one that supports existing recreational
and visual amenity values, as well as accessibility and infrastructure services. Therefore, the
preferred adaptation outcomes for this locality are:

   -   Implement measures that protect important recreational areas, stormwater network, road
       and footpath assets from periodic tidal inundation
   -   Where possible, re-locate major recreational and infrastructure assets (e.g. amenities
       blocks, the Tewantin water park) outside the projected high-risk foreshore areas by 2070
   -   Where important recreational assets cannot be feasibly re-located, seek to accommodate
       the risks by adapting the design of these assets (e.g. adaptive landscape design) to be
       more resilient
   -   Re-design important road and buried service infrastructure networks to be more resilient to
       inundation hazards.


Figure 20 shows the expected progression of these preferred outcomes between 2020 and 2100.
Table 21.22 provides a breakdown of actions in support of these outcomes, to be pursued within
the five -year life of this plan.




 Pathways Map Legend
 Star = trigger points (points in time for when a decision needs to be made)
 Circle = commencement or future commencement of adaptation option
 Green solid line = active action on this adaptation pathway
 Green dotted line = effectiveness of this option may be reduced and require
 reassessment




Noosa Council – Coastal Hazards Adaptation Plan                                               Page 76