Cell Descriptions - South East Natural Resources Management Board

SE11 – Guichen Bay
Climate change
element/ scenario
decadal scale.
Intensity of large
storms increases.
Impacts and implications
(for this cell)
Dawson Swamp at a 2.7 metre
inundation.
2070: Flooding will affect both
large lakes swamps and
adjacent low lying areas.
Frequent storm damage to
foredunes.
(Impacts uncertain. Existing
terrestrial vegetation is found
in warmer conditions
elsewhere)
Protect and manage
habitat threats
the adaptive
management of
estuarine environment
and lakes.
Address landscape
issues: fire,
connectivity,
refuges, hydrology
Active management of
dune blowouts.
Warmer average
conditions:
2030:+0.3 to.6 0 C
2070:+1.5 to 2 0 C
Drier average
conditions:
2030: -2% to 5%
2070: - 10% to 20%
Maintain
connectivity of
vegetation within
the region.
Dune vegetation adapts to
drier conditions, but recovers
more slowly from fire and
storm damage allowing weed
colonisation, notably exotic
grasses: dune mobilization
becomes more likely.
Reduced runoff and increased
evaporation threatens the lakes
and lakeshore habitats.
Active weed control
within dunes.
Ensure vegetated
dune areas are on
region fire plan.
Monitor seasonal
water levels and
salinity in lakes.
Adaptive management
of ecological assets.
Maintain watching
brief on sedimentation
of lakes.
‘Flashy’ run off:
Drier creeks, but
larger rare floods
Drains and creeks may
increase sediment load to
coastal swamps and lakes (this
depends on land management
practices).
Groundwater lowering a threat
to Lakes Eliza and Robe:
lowering freshwater pressure
and increasing saline water
pressure.
Groundwater
lowering; saline
incursion:
Monitor seasonal
water levels and
salinity in both lakes.
Adaptive management
of ecological assets.
Lakes represent any
obvious changes in
regional
groundwater levels.
Lowering of
regional water table
(and perched water
tables in dunes) a
threat to all habitats.
Nearshore sea
changes -
temperature;
acidity; wave
climate:
2030: +0.3 0 C to +
0.6 0 C
Changes are unlikely to affect
swell wave climate, apart from
increase in mean wave period.
(Changes in upwelling timing
and frequency has been
discussed, but not projected).
2070: +1.0 0 C to +
1.50C
Limestone Coast and Coorong Coastal Action Plan 405