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Julian O'Grady - Mapping Australia's Coastal Defences Structures: Understanding the Gaps and the Need for a National Dataset
This dataset and accompanying RMarkdown notebook document the analysis and efforts to consolidate spatial data on coastal protection structures, such as sea walls, groynes, and wharfs, across Australia's coastline. The project addresses the urgent need for a national-level dataset by sourcing data from various state governments and identifying gaps in coverage. The dataset integrates contributions from OpenStreetMap (OSM), Smartline, and state-based government databases, resulting in a research-quality geospatial file. Key attributes include the location and type of coastal structures, with data standardised for consistency across regions. Limitations are noted, such as the absence of government-supplied data for certain regions and potential accuracy issues with OSM-sourced information. The dataset is intended for research purposes, supporting efforts to assess coastal risks and guide future protection measures. Ongoing updates to datasets will extend to not only consider engineered hard structures but also include datasets of nature-based coastal protection (e.g., restored reefs and coastal vegetation).
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Living Shorelines Australia database: a national inventory of nature-based coastal protection projects (NESP MaC 1.10)
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Climate change and population growth are accelerating the need for diverse solutions to coastal protection. Traditionally, shorelines are armoured with conventional "hard" or "grey" engineering structures such as seawalls which are non-adaptive and come with significant economic, environmental and social costs. While hard structures have a place in coastal protection, alternative 'living shorelines' methods harness natural ecosystems to reduce coastal erosion and flooding and provide co-benefits such as carbon sequestration. They may consist of dunes, wetlands and biogenic reefs: either alone (‘soft approach’) or in combination with hard structures (‘hybrid approach’). The Living Shorelines Australia project (https://livingshorelines.com.au) compiled a database of nature-based ("soft" or "hybrid") coastal protection projects from across Australia. This database acts as a tool to help coastal managers make informed decisions by providing as many examples as possible of where these solutions have been used, how they were used, and how effective they are in different contexts. The information in this database was collected through direct engagement with coastal managers and stakeholders, a literature search, and informal internet searching. Under the NESP Marine and Coastal Hub Project 1.10, this database was established and populated with 138 projects identified through the process described above. Since then (2022), the database has continued to be updated by The University of Melbourne and now contains 200 nature-based coastal protection projects.
Coastal Protection Structures Line
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A dataset depicting coastal protective structures captured by the Department of Primary Industries for the Future Coasts Program in 2011 using aerial photography available in the DSE image repository, known as the Coordination Image Program (CIP). This dataset was further reviewed as part of the Future Coasts SECAP project (2011/2012). Information on the condition of a number of protection structures is available as a separate (restricted) database that links to this spatial dataset. The data was reviewed in 2017, adding asset IDs to enable linking to asset management data.
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