Attachment 4 - Option 1 Hydraulic Advice · RAL20/0005

Mitti St, Noosa Heads                                                                SLR Ref: SLR Memo 23 09 19.docx
Hydraulic Investigation                                                                      Date: 23 September 2019
Channel Widening Option




Figure 3     Peak Flood Hazard – 1% AEP Flood Event




The results of the analysis, as shown in the Figures above, are as follows:
     •     The peak flood depths beyond the channel are less than 500 mm.
     •     The impacts of the proposed works are less than 20 mm external to the subject site.
     •     The peak flood hazard beyond the channel; is less than 0.4 m²/s.




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