Attachment C_R.B23636.001.02.SEMP_final_lowres

Noosa Spit SEMP Final Report                                           ii
Contents




Contents
Executive Summary                                                           i
1    Introduction                                                       1
2    Noosa Spit Shoreline Erosion                                       3
     2.1    Introduction                                                3
     2.2    Previous Assessments                                        3
     2.3    Recent Observations                                         4
     2.4    Current Shoreline Erosion Strategy                         13
            2.4.1     Recent Shoreline Recession                       16
            2.4.1.1   Movement of vegetated shoreline                  16
            2.4.1.2   Available Recreational Beach Width               19
            2.4.1.3   Boat Wake                                        20
     2.5    Potential Entrance Configurations for Further Assessment   21
3    Numerical Modelling of Entrance Configurations                    23
     3.1    Background                                                 23
     3.2    Waves (SWAN)                                               23
            3.2.1     Nested Model Domain & Bathymetry                 23
            3.2.2     Model Configuration                              23
            3.2.3     Boundary Conditions                              25
     3.3    Hydrodynamics (TUFLOW FV)                                  25
            3.3.1     Model Domain, Mesh & Bathymetry                  25
            3.3.2     Model Configuration                              25
            3.3.3     Boundary Conditions                              26
     3.4    Sediment Transport (TRANSPOR)                              29
     3.5    Numerical Model Calibration & Validation                   29
            3.5.1     Targeted Data Collection                         29
            3.5.2     Laguna Bay Waves                                 32
            3.5.3     Laguna Bay Water Level & Currents                34
            3.5.4     Noosa River Water Level                          34
            3.5.5     Noosa River Flow                                 38
     3.6    Entrance Configuration Assessment                          41
            3.6.1     Impact to Water Level                            47
            3.6.2     Impact to Current Magnitude at Dog Beach         52
            3.6.3     Assessment Summary                               61
4    Shoreline Erosion Mitigation Options                              62


G:\Admin\B23636.g.mpb.NoosaSpit_SEMP\R.B23636.001.02.SEMP_final.docx