Appendix F - Flood Study

                                                                                                   Flood Study
                                                                                         Noosa Care - Carramar




Figure 3-2 Catchment Area



A kc value of 1.97 for the 10% AEP and 1.84 for the 1% AEP gave the best match to the Rational Method
discharges without underestimating flow at the outlet. A non-linearity factor ‘m’ of 0.8 was adopted.
Table 3-2 compares the peak flow values from RORB to the results of the Rational Method. The values indicate
that the hydrologic model is generating consistent peak flows compared to the Rational Method.

Table 3-2       Hydrology Validation
                                               1% AEP Peak Flow
               AEP
                                                    (m3/s)
               (%)
                                 Rational Method                  RORB
               10                      68.8                       68.8
                1                      122.9                      122.6




24 July 2017                                        Cardno                                                  7