Living Shorelines and restoration of Port River and Barker Inlet Estuary
Presentation to Port Adelaide U3A 29th August 2017 Catherine McMahon, Estuary Care Foundation Port River and Barker Inlet Estuary
Aerial view photo 2008 by Gary Sauer-Thompson Ecosystem services Nature-based solutions
• Nature based solutions can lessen the impact of sea level rise and be used instead of or in conjunction with hard structures • Pollution into the Port River has lessened, making nature based solutions more viable • Restoration of the Estuary is the focus of the Estuary Care Foundation SA, formed in 2016 US model of restoration
www.cbf.org July 2016 Nature-based solutions Key priorities of the Foundation • Living Shorelines • Shellfish Restoration • Seagrass Restoration • Community education and engagement What the future holds
AdaptWest, regional climate adaptation plan What the future holds Living Shorelines
• Eco-engineering • Environmentally friendly sea walls (NSW) • Coastal Resilience (USA) USA – Coastal Resilience
http://coastalresilience.org hosted by The Nature Conservancy (TNC) Living Shorelines
• shoreline protection options • offer erosion control benefits • natural coastal processes remain • strategically place plants, stone, sand fill and other materials USA experience How cost effective is natural infrastructure?
The Nature Conservancy
13 Examples of Living Shorelines
This living shoreline replaced a failing bulkhead at a state boat ramp on the Chowan River, North Carolina (Source: Coastal Review Online) Examples of Living Shorelines
Avon River Environment Association (Canada) building a Living Shoreline 2010 Example of Living Shoreline, NSW
Carss bush park seawall with rockpools, extended slope, crevices, endangered saltmarsh, Kogarah Council 2016 Living Shoreline – Port River
Drawings: Peri Coleman 2015 Mangroves protect our shoreline Mangroves protect our shoreline Mangroves protect our shoreline Protecting the mangroves
Info by Peri Coleman Shaping our landscape
Port waterfront in early 19th Century Shaping our landscape Nature of our landscape
Northern LeFevre Peninsula sketch map B.C. Cotton 1954 Levee bank breached at Mutton Cove
9th May 2016, anticipated 2.7m tide recorded at 3.9m at OH Mutton Cove after the breach
Photograph Sept 14th 2016, approx 2.2m tide 2016 flooding with high tide
Portside Messenger: Flooding near Birkenhead Bridge, May 2016 Further development
Areas for Port redevelopment Inadequate shoreline protection
Raised buildings and eroding seawall, NewPort Quays Shoreline protection needed Trialling Living Shorelines
• Desirably in Inner Harbour • National Disaster Resilience Program application by Foundation • State Government funding to support urban renewal Seagrass Restoration
https://www.youtube.com/watch?v=JaJG-xQJrvY Seagrass in Port River
Zostera in Port River; photo by Kym Murphy Little Ravens walking on Zostera, northern end of Mutton Cove, low tide, 27 October 2015; photo by Kym Murphy SARDI 2014
Zostera near Quarantine Station, Torrens Island, Feb 2017; photo by Peter Carter Seagrass around remains of Dorothy H Sterling; photo by Steve Duncan Community Education Community Education Estuary Care Foundation Inc http://lefevre.noticeboard.net.au/?page_id=901
Catherine McMahon
0413 578086