Development Application - Part 2 of 2 - Report & Plans · OPW11/0116

Figure 17: Potential channel alignment in the event of breaching of Noosa Spit to the ocean




                         P0.1      7"
Figure 18: Potential wave penetration into the estuary

The potential impacts of the "do nothing" option include:
               •    Eroded beach
                          •    Reduced opportunities for beach recreation and safe swimming
                          •    Safety issues [unstable banks in such a popular area]
                          •    Loss of Council pathways and established vegetation
                          •    Adverse public perception
               •    Increased wave penetration into the estuary, particularly at Munna Point [increased erosion]
               •    Breach of the Noosa River Spit through to Noosa Sound
                          •    Potential for substantial changes to the entrance dynamics
                          •    Possible wave penetration into Noosa Sound
                          •    Undermining of Noosa Sound retaining walls
                          •    Loss of Noosa Sound as an anchorage
                          •    Possible detrimental impact on navigation within the entrance
                          •    Complete loss of Noosa River Spit [including mangrove communities]
               •    Breaching of the Noosa Spit to beach
                          •    Loss of Council road, paths. infrastructure, facilities etc
                          •    Isolation and possible undermining of Noosa River entrance training wall
                          •    Complete loss of Noosa Spit and beach from training wall back to Hastings St
                          •    Possible impact on Noosa Main Beach
               •    Possible detrimental impacts on Fish Habitat Area

Given the significant impacts associated with the "do nothing" option, it is not considered to be desirable and is not
recommended as a long-term strategy.