Cell Descriptions - South East Natural Resources Management Board

SE8 – Rivoli Bay
Climate change
element/ scenario
Combined climate
changes and sea
level rise
throughout this
cell
Sea level rise:
2030 : +c.20cm
2070: +c.80cm
Storms:
Frequency continues
to show great
variation on a
decadal scale.
Intensity of large
storms increases.
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%
‘Flashy’ run off:
Drier creeks, but
larger rare floods
Groundwater
lowering; saline
incursion:
Impacts and implications Protect and manage Address landscape
(for this cell) habitat threats issues: fire,
connectivity,
refuges, hydrology
This cell presents a complex
pattern of habitats sensitive
to change.
Increase in storm foredune
damage and beach recession.
Acceleration of erosional
processes at Southend and
Beachport.
Foredune damage leads to
dune de-stabilisation, and
transport of sand into and
across the dune ridges.
2030: Occasional storm tide
flooding above highest
known tides.
2070: Flooding will affect all
swamps and adjacent low
lying areas.
Frequent storm damage to
foredunes.
(Impacts uncertain. Existing
terrestrial vegetation is
found in warmer conditions
elsewhere)
Dune vegetation adapts to
drier conditions, but
recovers more slowly from
fire and storm damage: dune
mobilization becomes more
likely.
Drains and creeks may
increase sediment load to
coastal swamps and lakes
(this depends on land
management practices).
Groundwater lowering a
threat to Mullins Swamp,
and dune ridge vegetation.
Create a baseline for
shoreline, dune and lake
change by establishing a
rectified aerial
photographic record at
an appropriate
resolution.
Maintain an aerial
photographic record of
shoreline change within
Rivoli Bay.
Use profiles to monitor
these changes.
Review sand budget
within the whole bay.
Active management of
dune blowouts, where
conservation values are
threatened, as at Mullins
Swamp.
Manage valve on tidal
inlet to adjust to higher
marine storm elevations
as part of the adaptive
management of Lake
Frome drain, and
Mullins Swamp.
Active management of
dune blowouts.
Active weed control
within dunes.
Maintain watching brief
on sedimentation of
Mullins Swamp.
Monitor seasonal water
levels and salinity in
Mullins Swamp.
Adaptive management
Maintain
connectivity of
vegetation within
the region.
Limestone Coast and Coorong Coastal Action Plan 335