Development Application - Part 2 of 2 - Report & Plans · OPW11/0116

EXECUTIVE SUMMARY

With the exception of those areas already protected by rock works, Noosa River Spit is currently experiencing erosion along
its full length, including the southern end of the Noosa River Spit. Various options have been fully investigated using
numerical modeling, including:

    A.   Do Nothing.
    B.   Establish erosion limit control lines [present strategy].
    C.   Stabilise present channel location and beach:
             C.1 Wall with embayed beach.
             C.2 Groyne field.
    D.   Relocate main channel away from the beach:
             D.1 Submerged upstream closure.
              D.2 Submerged upstream & downstream closure.
            D.3 Training Wall with submerged upstream & downstream closure.
    E.   Combination.

The preferred option includes [as per Figure El below]:
     •    Submerged curved 'closure' [sand-filled geotextile mega-containers) designed to create an enclosed, stable
          beach and lagoon area
     •    Dredging and associated foreshore nourishment
     •    Training wall [sand-filled geotextile mega-containers] to provide a control point for the southern channel
     •    Wall [sand-filled geotextile mega containers] to prevent erosion along southern end of the Noosa River Spit
     •    Two groynes [2.5m3 sand-filled geotextile containers] to stabilize the upstream beach




Figure E1: Proposed Strategy