Coastal Hazard Assessment · MCU25/0087

SandMap – Report of Survey for Sunshine Beach Profiles



                  Dynamic calibration
           Pre and post survey system checks were undertaken at predetermined marks. As the same
           GNSS system was being used for survey control checks, these checks were able to prove the
           accuracy of the navigation data input.

                  Bar check
           A bar check was carried out on this project. This was carried out in the Noosa River however,
           with likely different sound velocity to the ocean area of the survey site. As the bar check is
           generally used to adjust SVP values within the SBES to correct the depth/time relationship, in
           this case the sound velocity values would be significantly different on site and it was thought
           better to conduct SVP dips at the site and adjust values within the SBES controller from those
           real time results. This was carried out and the check results against the land based survey
           prove the adequacy of this method.

                  Water column sound velocity profile calibrations
           Sound Velocity Profile dips were taken using a SWiFTSVP instrument at the start of the survey
           and incorporated into the CEE ECHO SBES prior to the commencement of survey.




           Figure 6: Valeport SWiFT SVP

           Sounding reduction and data presentation
                  Methods to reduce raw data to sounding datum
           BeamworX software was used to reduce soundings from ellipsoid height to datum by use of
           AUSGeoid2020 during acquisition.

                  Principle and method used in sounding selection
           Soundings were mean values. Plans were created for this project from the thinned data.




Rev. no.    Doc No.                                        Version Date          Doc Approver
  1         P0100-20251020                                 20/10/2025            Rod Tansley                        Page 12 of 20

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