2019-12-16 GC Agenda - Item 5 - Attachment 1 - Noosa Spit Shoreline Erosion Management Plan-Part 2

1.0 Introduction
Acoustic Imaging Pty Ltd (AI) was contracted by the Noosa Council (NC) to carry out a
bathymetry and land survey of the Noosa River extending from the Noosa River Ferry
crossing to 500m offshore of the Noosa River entrance. Both surveys will contribute to a
Shoreline Erosion Management Plan being developed for the Noosa Spit region by coastal
engineering consultants (Figure 1).
The specific survey services requested by NC included:
    •   A hydrographic survey of the Noosa River and river mouth, and;
    •   A land-based survey of shoreline positions and sand shoals to overlap the
        hydrographic survey points.




                       Figure 1: Regional overview of Noosa River survey.



Three primary surveys were conducted as part of this project.
    •   An initial multiphase echo sounder (MPES) survey was conducted using the Marine &
        Earth Sciences (MES) vessel SURVEY1 between March 14-20, 2019. Survey
        coverage over this period essentially mapped all areas deeper than the 0.5m contour
        on the prevailing tide.
    •   A secondary single beam echo sounder (SBES) survey conducted on April 09, 2019
        to augment depth information across the sand shoal region of the Noosa River
        Entrance.
    •   A selective land survey conducted on April 09 and further infill on May 02, 2019 to
        capture beach transects, exposed sand shoals in the Entrance region, and foreshore
        regions around Dog Beach and along Gympie Terrace.




4                             Noosa Council - Noosa River Survey                    20.06.2019