and restoration of Port River and Barker Inlet Estuary Presentation - PowerPoint PPT Presentation

Living Shorelines and restoration of Port River and Barker Inlet Estuary Presentation to Port Adelaide U3A 29 th 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 19 th Century

Shaping our landscape

Nature of our landscape Northern LeFevre Peninsula sketch map B.C. Cotton 1954

Levee bank breached at Mutton Cove 9 th May 2016, anticipated 2.7m tide recorded at 3.9m at OH

Mutton Cove after the breach Photograph Sept 14 th 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 estuarycare@internode.on.net 0413 578086