Erosion at Newry Island was excerbated by major flood events, boat wash and unmanaged livestock access. Active erosion was significantly reduced after the installation of rock revetment and rock-and-timber fillets. Six months after the installation, mangroves started to establish in the newly accreted fine sediment. Diversity of macroinvertebrates also increased at the rehabilitated area. The project was funded by a Environmental Restoration and Rehabilitation 2015-2016 grant from the NSW government.
Mangroves
Method: Hybrid
Mangrove species: Avicennia marina
Hybrid structure: Rock-and-timber fillets, Rock revetment
Hybrid structure height (m): ~0.5 m above high tide
Hybrid structure length (m): 320m (rock-timber fillets), 250m (rock revetment)
Approach
Mangroves
Geographic context
Estuary
Organisation responsible
Bellingen Shire Council/University of New England
Primary objective
Coastal protection
Coastal hazard
Erosion
Asset vulnerable
Natural, Agricultural
Length of coastline targeted (m)
570
Date of completion
Spring 2017
Cost ($AUD)
$100,000
Source of project funding
NSW Environmental Trust Project
Project approvals needed
State
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