2019-09-10 Services & Organisation Committee Agenda

SERVICES & ORGANISATION COMMITTEE MEETING AGENDA                                     10 SEPTEMBER 2019


REPORTS FOR NOTING BY THE COMMITTEE

3                        NOOSA SPIT SHORELINE EROSION UPDATE - SEPTEMBER 2019
DOCUMENT INFORM AT ION




Author                             Project Coordinator – Flooding, Coastal and Foreshore, Daniel Wishaw
                                   Infrastructure Services Department

Index                              ECM/ Project / Noosa Dog Beach SEMP Coastal Monitoring – CAP. 100723
                                   ECM / Subject / Erosion

Attachments                        Nil



EXECUTIVE SUMMARY
Not applicable

RECOMMENDATION
That Council note the report by the Project Coordinator – Flooding, Coastal and Foreshore to the
Services & Organisation Committee Meeting dated 10 September 2019 providing an update on
the development of a Shoreline Erosion Management Plan (SEMP) for Noosa Spit.


REPORT

1.                       Background

Council, at its Ordinary Meeting dated 15 November 2018, supported the development of a
Shoreline Erosion Management Plan (SEMP) for Noosa Spit and the provision of a quarterly
update.

2.                       Project Update

The Noosa Spit SEMP project is currently on track, with the first four of eight phases of the
project now complete (see Table 1 for all phases). Since the June 2019 quarterly update, our
consultants, BMT, have completed the model set-up, conceptual river mouth modelling and have
initiated the coastal strategy development.

As part of the Noosa Spit SEMP project, BMT were tasked with comparing the existing river
mouth configuration with other historically relevant river mouth configurations, as well as,
investigating the impacts of a ‘breakthrough’ event of the Noosa Spit. These were completed
using a process called ‘conceptual modelling’ where the actual configuration of the river mouth is
replicated, within a computer simulated model, to simulate alternative configurations. The
impacts, measured as water levels and water velocities over a typical tidal cycle, were recorded
at 115 points along the Noosa River, for five separate river mouth configurations.




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