Long-term estuarine processes along with coastal and tidal inundation were causing erosion on a section of foreshore in front of Lion's Park, Burrill Lake. This was exposing a recreational reserve and Council roads to storm damage. Shoalhaven City Council undertook beach scraping using sand from the adjacent tidal flat, in combination with revegetation, formalisation of accessways and installation of sand fencing/jute mesh to encourage faster stabilisation of the new dune sands. The dune/bank stabilisation measures have been monitored and maintained by Council on an ongoing basis, since implementation.
Beach renourishment
Method: Scraped
Sand source: Same sediment compartment
Sand volume (m2): 2000
Sand placement: Dune area, Visible beach
Frequency of renourishment: Once (two stages)
Date of first renourishment: 2021
Date of last renourishment: 2021
Dune replanting or construction
Method: Revegetation, Rehabilitation, Sand fencing
Rehabilitation - method: Restrict pedestrian access, Educational signage
Revegetation - species: Carpobrotus glaucescens, Casuarina glauca, Rhagodia candolleana , Lomandra longifolia, Banksia integrifolia, Tetragonia tetragonioides
Sand fence material: Hessian Cloth, Galvinised wire, and timber stakes. Also approximately 500m2 of jute mesh installed directly on sand.
Sand fence configuration: Alongshore
Sand fence height (m): 600 mm
Sand fence length (m): 45
Approach
Beach renourishment, Dune replanting or construction
Geographic context
Estuary
Organisation responsible
Shoalhaven City Council, NSW Department of Planning and Environment.
Primary objective
Coastal protection
Coastal hazard
Erosion, Flooding
Asset vulnerable
Recreational, Built
Length of coastline targeted (m)
300
Date of completion
2022
Cost ($AUD)
$60,000
Source of project funding
Local government, State government
Project approvals needed
local, State, Native title