Appendix F - Flood Study

                                                                                                     Flood Study
                                                                                           Noosa Care - Carramar



Based on the proposed layout the minimum floor levels for each building (refer Figure 5-2) are provided in
Table 5-5.
As indicated on the Flood Information Certificate (Appendix A), a higher minimum floor level may be applicable
for Aged Residential Care Facilities, and Noosa Council will need to provide further advice as to what minimum
floor levels are required. At the time of report writing, no confirmation of required freeboard levels had been
provided. Residential buildings typically require 300mm of freeboard.

Table 5-5      Minimum Floor Levels Required

  Building Number     Minimum Floor Level (mAHD)

           1                 8.3 + freeboard
           2                 8.3 + freeboard
           3                 8.3 + freeboard
           4                 8.3 + freeboard
           5                 8.5 + freeboard
           6                 8.5 + freeboard
           7                 8.5 + freeboard


5.6            Local Road Immunity
In both the 1% and 10% AEP climate change flood events, Cooroy-Noosa Road is not inundated. Therefore,
sufficient access to the site is provided. Carramar Street has 10% AEP climate change flood immunity.

5.7            Proposed Development
As shown in Figures 6-1 to 6-8, the sites of buildings 3, 4 and 5 are inundated in the 1 and 10% AEP flood
events. The design of the buildings will therefore need to ensure that flood free access to each building is
provided, that any car parking has sufficient flood immunity and that the proposed development does not result
in a loss of flood storage. The results of the local flood modelling showed that relatively low peak velocities
are observed where buildings are proposed, due to the backwater effects of the dam. The peak 1% AEP
velocity is 0.4 m/s. If earthworks are necessary, then additional modelling to demonstrate that the development
does not cause flood level impacts for surrounding areas may be required. This analysis is beyond the scope
of the current study.




24 July 2017                                        Cardno                                                   15