WA COASTAL COMPARTMENTS A Geological Framework for Marine and Coastal Management Presentation to...
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Transcript of WA COASTAL COMPARTMENTS A Geological Framework for Marine and Coastal Management Presentation to...
WA COASTAL COMPARTMENTSWA COASTAL COMPARTMENTSA Geological Framework for Marine and Coastal ManagementA Geological Framework for Marine and Coastal Management
Presentation to Marine Group Workshop at the WALIS Forum 2009
Ian Eliot & Christopher Nutt
November 2009
A project initiated by the Department of Environment & Conservation, the Geological Survey of Western Australia and now undertaken jointly with the Departments of Planning and Transport
Project AimsProject Aims
The aims of the project are to:The aims of the project are to:• Identify a hierarchy of planning units based Identify a hierarchy of planning units based
on natural coastal systems similar to the on natural coastal systems similar to the approach used to identify river catchments.approach used to identify river catchments.
• The marine and coastal planning units The marine and coastal planning units should approximately accord with mapping should approximately accord with mapping scales commonly used for the preparation of scales commonly used for the preparation of statutory plans.statutory plans.
BASIC CONCEPTS
1. The hierarchy of planning units is based on the geologic framework of the coast.
2. At the broadest planning levels the planning units comprise a set of discrete coastal compartments determined by geologic boundaries, structures, landforms and aspect of the shore together with the landforms they contain.
3. At the most detailed planning levels the planning units are identified as sediment cells in which sediments sources, transport pathways and sinks can be clearly defined.
4. Together, coastal compartments and sediment cells provide a framework for a variety of applications including:
(a) planning and management of natural resources within the nearshore marine and coastal environment; and
(b) assessment of vulnerability to coastal hazards, climate change and rise in sea level.
Priority Feature Examples
1 Changes in bedrock geology Metamorphic to sedimentary rocks; lithified to unconsolidated sediments
2 Rock structures (topography) Rocky capes, peninsulas, termination of extensive cliffs
3 Geomorphic features (morphology)
Large cuspate forelands and tombolos; extensive sandy beaches
4 Change in aspect of the shore Bald Head at the entrance to King George Sound; changes in aspect along Eighty Mile Beach
COMPARTMENT BOUNDARIES
HierarchicalLevel
Location, climate, geology, landscape, biological province
Nominal Scale
1: 1 000 000
1: 250 000
1: 50 000
1: 10 000
Location, climate, large landforms, bathymetry, hydrology, primary biotopes
Location, geology, geomorphology, physico-chemical and biological features, jurisdictional areas, secondary biotopes
Location, geology, geomorphology, coastal dynamics, physico-chemical and biological features (ecological character), habitats, biological facies, jurisdictional areas, land tenure, land use, management issues, environmental hazard and risk
Level 2Regional strategies
Level 1Policy
Level 3Regional and local plans
Basic information (core data) requirements
Level 4Local and site plans
Mapping Scale Planning Hierarchy
REGIONS & PRIMARY COMPARTMENTS
Compartments have been identified for three levels.
These correspond with the lower three tiers in the planning hierarchy.
Landforms contained in the primary and secondary compartments have been identified.
Potentially these broad descriptions are applicable as planning units at regional strategic planning levels
HIERARCHY OF COASTAL COMPARTMENTS
THE LOCAL SCALE: SEDIMENT CELLS & SEDIMENT BUDGETS
From Stul et al (2007)
POTENTIAL APPLICATIONS
COMPARTMENTS
Landforms (Framework) & Processes (Drivers)
PLANNING PURPOSES
Marine & coastal
planning
Habitat description
Marine & coastal risk assessment
Marine conservation
EBFM
SCALE SECTION OF INTEREST AGENCIES APPROACH
STRATEGIC1:250 000 to1:1 000 000
Primary and Secondary Coastal Compartments around WA
DECDoPDoT
Habitat mapping; conservation planningPlanning & policy; Hazard & risk assessment
REGIONAL1:50 000 to1:250 000
South Coast: Cape Leeuwin to SA Border
DEC Habitat mapping; regional marine planning
Pilbara: Entrance Point to Cape Jaubert
DEC DoPDoT
Habitat mapping; regional marine planningCoastal vulnerability & climate change
Kimberley: Cape Jaubert to NT Border
DEC Habitat mapping; regional marine planning
SUB-REGIONAL1:10 000 to1: 50 000
NAR: Guilderton to Kalbarri
DoPDoTGPACGG
Coastal planning & management Hazard & risk assessmentPort maintenance & coastal stabilityCoastal vulnerability & climate change
Mandurah LGA MCCDoP & DoT
Coastal planning & management Coastal vulnerability & climate change
LOCAL> 1:10 000
Binningup to Dawesville
DoP & DoT Hazard & risk assessmentCoastal vulnerability & climate change
Lancelin Townsite GSCDoT
Hazard & risk assessmentCoastal vulnerability & climate change
SOME PROJECTS IN PROGRESS: INCLUDING CASE STUDIES
WHERE TO NEXT?
Primary and secondary planning units (compartments & the landforms each contains) have been completed for the State.
Tertiary compartments have been identified but the landforms each compartment contains remain to be determined
There is a need to agree on appropriate descriptors of the landforms at each level to avoid duplication of jargon.
Examples of the potential planning applications at each scale are being compiled, particularly potential use in the Coastal Planning Policy (SPP 2.6).
Custodianship of the data needs to be determined, although GSWA is recommended as the potential custodian.
The framework will be made available for use by interested agencies and organisations and it is up to whoever is interested to further develop the applications.
Thanks for your attention