Transcript Slide 1

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
WA COASTAL COMPARTMENTS
A Geological Framework for Marine and Coastal Management
Presentation to Marine Group Workshop
at the WALIS Forum 2009
Ian Eliot & Christopher Nutt
November 2009
Project Aims
The aims of the project are to:
• Identify a hierarchy of planning units based
on natural coastal systems similar to the
approach used to identify river catchments.
• The marine and coastal planning units
should approximately accord with mapping
scales commonly used for the preparation of
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
Mapping Scale
1: 1 000 000
1: 250 000
1: 50 000
1: 10 000
Nominal
Scale
Hierarchical
Level
Location, climate,
geology, landscape,
biological province
Planning Hierarchy
Level 1
Policy
Location, climate, large
landforms, bathymetry,
hydrology, primary biotopes
Location, geology, geomorphology, physicochemical and biological features, jurisdictional
areas, secondary biotopes
Location, geology, geomorphology, coastal dynamics, physicochemical and biological features (ecological character), habitats,
biological facies, jurisdictional areas, land tenure, land use,
management issues, environmental hazard and risk
Basic information (core data) requirements
Level 2
Regional strategies
Level 3
Regional and local
plans
Level 4
Local and site plans
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
From Stul et al (2007)
THE LOCAL SCALE: SEDIMENT CELLS & SEDIMENT BUDGETS
POTENTIAL APPLICATIONS
COMPARTMENTS
Landforms (Framework) & Processes (Drivers)
PLANNING PURPOSES
Marine &
coastal
planning
Marine &
coastal risk
assessment
Habitat
description
Marine
conservation
EBFM
SOME PROJECTS IN PROGRESS: INCLUDING CASE STUDIES
SCALE
SECTION OF INTEREST
AGENCIES
APPROACH
STRATEGIC
1:250 000 to
1:1 000 000
Primary and Secondary Coastal
Compartments around WA
DEC
DoP
DoT
Habitat mapping; conservation planning
Planning & policy; Hazard & risk assessment
REGIONAL
1:50 000 to
1:250 000
South Coast: Cape Leeuwin
to SA Border
DEC
Habitat mapping; regional marine planning
Pilbara: Entrance Point
to Cape Jaubert
DEC
DoP
DoT
Habitat mapping; regional marine planning
Coastal vulnerability & climate change
Kimberley: Cape Jaubert
to NT Border
DEC
Habitat mapping; regional marine planning
NAR: Guilderton
to Kalbarri
DoP
DoT
GPA
CGG
Coastal planning & management
Hazard & risk assessment
Port maintenance & coastal stability
Coastal vulnerability & climate change
Mandurah LGA
MCC
DoP & DoT
Coastal planning & management
Coastal vulnerability & climate change
Binningup
to Dawesville
DoP & DoT
Hazard & risk assessment
Coastal vulnerability & climate change
Lancelin Townsite
GSC
DoT
Hazard & risk assessment
Coastal vulnerability & climate change
SUBREGIONAL
1:10 000 to
1: 50 000
LOCAL
> 1:10 000
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