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2021-11-15 GC Agenda - Item 7 - Attachment 1 - Coastal Hazards Adaptation Plan
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Log in to see the plans as drawn Noosa Coastal Hazards Adaptation Plan
MARCUS BEACH AND CASTAWAYS BEACH
Setting Risks to Marcus Beach and
Marcus Beach and Castaways Beach are Castaways Beach
localities set in undulating coastal dunes and The beachfront in this area has historically
vegetation. They are located midway along experienced short-term erosion along the beach
what is locally known as the ‘Eastern Beaches’. and frontal dunes after large swells and tropical
Both localities each have beachfront totalling cyclones, with recovery occurring through natural
MARCUS
approximately BEACH AND
two kilometres CASTAWAYS BEACH
in length. coastal processes gradually over time. Appendix
Protected by vegetated dune buffers, both 4 shows the projected change in the erosion
Setting
localitiesMarcus
predominately provide housing for
Beach and Castaways Beach are localitiesprone set in undulating
area due to coastal dunes
sea level and
rise vegetation.
across various
permanent They residents,
are locatedwith some along
midway short-term
what isvisitor
locally known
partsas the ‘Eastern Beach
of Marcus Beaches’.andBoth localities Beach
Castaways
each haveand
accommodation, beachfront totalling
commercial or approximately
retail uses. two kilometres in length. Protected by vegetated
during a severe storm event. Table 6 provides a
dune buffers, both localities predominately provide housing for permanent residents, with some
Two coastal creeks, Marcus Creek, Castaways
short-term visitor accommodation, and commercialsummary of the
or retail uses. Two changing risk profile
coastal creeks, Marcus for six broad
Creek, and Burgess Creek flow through the
Creek, Castaways Creek, and Burgess Creek flow asset through the coastal
types dunes
within the to thethat
locality beachareand out
projected
coastal dunes
to sea.to the beach
David Low Way and out to sea.
represents the primary meansto be of exposed
entering and exiting
to the theseoflocalities
effects coastalfrom erosion
David Low theWaySouth and the North.
represents For muchmeans
the primary of this area, David Low Way is situated between residential
between present day and 2100.
areas and the dune zone and beachfront.
of entering and exiting these localities from the
South and the North. For Beach
much of this area, David Due to the ongoing presence of wide vegetated
Risks to Marcus and Castaways Beach
Low WayThe is situated between residential areas experienceddune systems in this locality, much of the risk
beachfront in this area has historically short-term erosion along the beach and
frontalzone
dunes after large swells and tropical cyclones, from erosion
with recovery is only likelythrough
occurring to affect natural assets,
natural
and the dune and beachfront.
coastal processes gradually over time. Appendix 4 with shows the projected
some potentialchange
for risksintotheDavid
erosionLow Way
prone area due to sea level rise across various parts of Marcus Beach and Castaways
and the parking area at Castaways Beach toward Beach
during a severe storm event. Table 6 provides a summary of the changing risk profile for six broad
the end of the century. Damage to David Low
asset types within the locality that are projected to be exposed to the effects of coastal erosion
between present day and 2100. Way in this locality could present an accessibility
hazard to the community in Castaways Beach, as
Due to the ongoing presence of wide vegetated dune thissystems in this locality,
road provides the onlymuch of thetorisk
access from
this suburb
erosion is only likely to affect natural assets, with some potential for risks to David Low Way and
from the north and south. Costs associated with
the parking area at Castaways Beach toward the end of the century. Damage to David Low Way in
this locality could present an accessibility hazard torepairing
the communitythis damage wouldBeach,
in Castaways be significant
as this and
road provides the only access to this suburb from the involve
northlengthy
and south. construction times. with
Costs associated
repairing this damage would be significant and involve lengthy construction times.
Asset Type Erosion Risks by Year
Present Day 2040 2070 2100
Tourism Low
Business Low
Residential Low
Infrastructure30 Low Medium High Very High
Recreational Low Medium
Natural Low Medium
Table 6 - Change in Marcus Beach and Castaways Beach asset risk profiles across planning horizons
Table 6 - Change in Marcus Beach and Castaways Beach asset risk profiles across planning horizons
At present, the only methods for mitigating coastal erosion risks in Marcus Beach and Castaways
Beach are:
- Maintaining and enhancing vegetated dune areas, which act as a natural buffer to erosion
by dispersing wave energy during storm events
30
Some buried- infrastructure
Planning controls
is at risk,on coastalthe
however development that prevent
primary infrastructure encroachment
of concern into the
in this locality vegetated
is David Low Way
dune areas, thereby preserving natural coastal processes of erosion and accretion.
Page 47
Adaptation outcomes and associated actions for Marcus Beach and Castaways Beach
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