Attachment C_R.B23636.001.02.SEMP_final_lowres

Noosa Spit SEMP Final Report                                                                                                                                                                                                                                                                                                                                                                                                70
Shoreline Erosion Mitigation Options




                                                                                                           Treats Oceanic Inundation


                                                                                                                                       Maintains Beach Amenity




                                                                                                                                                                                                                                                  Community Acceptability
                                                                Planning & Consultation




                                                                                                                                                                                                                        Environmental or Social




                                                                                                                                                                                                                                                                                                                                                                             Score (Go = 1, Slow = 0,
                                                                                                                                                                                                                                                                                                     Effectiveness over time
                                                                                                                                                                                                                                                                            Reversible / Adaptable




                                                                                                                                                                                                                                                                                                                               Legal / Approval Risk
                                                                                                                                                                 Maintains Foreshore
                                                                                                                                                                                                                                                                                                                                                                                                        Recommended




                                                                                                                                                                                                                                                                                                                                                       Technical Viability
                                                                                                                                                                                                      Recurrent Costs
Option                Option Type                                                                                                                                                                                                                                                                                                                                                                       Asset Type &/or




                                                                                          Treats Erosion
                                                                                                                                                                                                                                                                                                                                                                                                        Other Comments




                                                                                                                                                                                       Capital Cost




                                                                                                                                                                                                                                                                                                                                                                             Stop = -1)
                                                                                                                                                                 Habitat




                                                                                                                                                                                                                        Impact
Protect - Local Management Options

                                                                                                                                                                                                                                                                                                                                                                                                        High certainty of
                                                                                                                                                                                         S               S                 S                          S                          S                                                 S                                                                    protection of land. Likely
                      Extend rock revetment seawall
Seawall Along                                                                                                                                                                            t               l                 l                          l                          t                       G                         l                       G                                            loss of social and
                      protection to protect land from                                     ✓                1/2                         1/2                                                                                                                                                                                                                                       2
Dog Beach             erosion.
                                                                                                                                                                                         o               o                 o                          o                          o                       o                         o                       o                                            recreational values
                                                                                                                                                                                         p               w                 w                          w                          p                                                 w                                                                    associated with Dog
                                                                                                                                                                                                                                                                                                                                                                                                        Beach.

                                                                                                                                                                                         S                                                                                                                                                                                                              Potential challenges
                                                                                                                                                                                                         S                 S                          S                         S                                                  S                       S
                      Construct field of short groynes                                                                                                                                   t                                                                                                                                                                                                              associated with scour at
Groyne Field                                                                                                                                                                                             l                 l                          l                         l                        G                         l                       l
                      along Dog Beach to deflect currents                                  ✓               1/2                            ✓                        ✓                     o                                                                                                                                                                                       0                      the head of the
Along Dog Beach       and stabilise the shoreline.                                                                                                                                       p
                                                                                                                                                                                                         o                 o                          o                         o                        o                         o                       o
                                                                                                                                                                                                                                                                                                                                                                                                        relatively small
                                                                                                                                                                                                         w                 w                          w                         w                                                  w                       w
                                                                                                                                                                                                                                                                                                                                                                                                        structures.

                      Extension of training wall to the                                                                                                                                  S               S                 S                          S                         S                                                  S
Extension of                                                                                                                                                                             t                                                                                                                                                                                                              Potential impact to
                      south of Dog Beach and/or rock                                                                                                                                                     l                 l                          l                         l                        G                         l                       G
Existing Control      revetment to the north of Dog Beach
                                                                                           ✓               1/2                            ✓                        ✓                     o               o                 o                          o                         o                        o                         o                       o                     1                      navigation will need to
Structures                                                                                                                                                                               p                                                                                                                                                                                                              be managed.
                      to divert channel flow.                                                                                                                                                            w                 w                          w                         w                                                  w

                      Nourishment of shoreline and/or
                      infilling of channels to offset erosion                                                                                                                                                                                                                                                                                                                                           Ongoing commitment
Beach                 and maintain/improve beach                                                                                                                                         S               S                 S                                                                             S                         S                       S                                            required.
Nourishment /         amenity.                                                                                                                                                           l               l                 l                          G                         G                        l                         l                       l
                                                                                           ✓                                              ✓                        ✓                                                                                                                                                                                                             2                      Potential impact to
Sand Relocation                                                                                                                                                                          o               o                 o                          o                         o                        o                         o                       o
                                                                                                                                                                                                                                                                                                                                                                                                        navigation will need to
                      Sand potentially accessed from spit                                                                                                                                w               w                 w                                                                             w                         w                       w
Program               to the north of Dog Beach or shoals                                                                                                                                                                                                                                                                                                                                               be managed.
                      to the west of Dog Beach.




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