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Salinity
in an Urban Landscape
This
fieldtrip is designed to give students of
Humanities - Geography (5,6), Civics and Citizenship (5,6), Science (5,6) and VCE Geography
the opportunity to experience salinity first
hand and to provide teachers with ideas
for class fieldwork and activities in the
Greater Melbourne area. Teachers may also adapt sections of this resource to address VCE Biology, VCE Environmental Science and VCE Outdoor and Environmental Studies outcomes.
The
journey looks at the causes, impacts and
management of salinity in an urban environment.
The
themes for the fieldwork are:
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Where
have we come from? |
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What
is being done? |
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What
does it mean? |
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Location
Braeside Park covers 312 hectares in Melbourne’s south eastern suburb of Braeside. Managed by Parks Victoria, it is a large recreation and conservation site that features picnic facilities amongst heathlands, wetlands and red gum woodlands. Braeside Park is the largest remnant of Grassy Woodland vegetation in south east Melbourne.
Local
Information
The Braeside area is in a rain shadow and receives just under 600 mm/year of rainfall.
The Friends of Braeside Park group is working together with Parks Victoria staff to implement a management plan for the Park.
What
you will see
Located in the southern area of the Park, thirty
hectares of red gum woodland has been affected
by salinity. Parts of this site have been fenced
off and revegetated as part of the management
plan for the Park. The
site was once covered with a Red Gum Grassy Woodland.
With increased urban development in the area,
a sewerage treatment plant was constructed on
the site in 1939. The area was also irrigated
with wastewater and extensively grazed by cattle.
The
treatment plant was decommissioned in 1978 when
an underground trunk sewer line was dug to a depth
of 6 metres (in the area adjacent to the dead
trees). This has changed the hydrology of the
site and has contributed to the salinity that
you see here today.
Part of the remnant vegetation in the Park is
under stress from disturbance, fragmentation and
salinity, which is leading to dieback of Red Gums.
Other issues affecting the vegetation in the Park
are:
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a
large possum population, |
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insect
attack on plants, |
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high
winds, |
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a
large ibis population, |
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drought
and low rainfall, |
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soil
compaction. |
Issues
The Red Gums in the area have been progressively
dying off.
The
water table appears to have risen further affecting the vegetation
in areas of the Park.
Action
Revegetation in the Park has been ongoing for
20 years. Recently, the very active 'Friends of
Braeside Park' (www.braesideparkfriends.org.au)
applied for funding through Parks Victoria
Grants to revegetate the salinity-affected area.
Much of the revegetation you see in this area
has been undertaken since 1999. A grazing regime
for the area is currently in place as a management
tool, however grazing is being progressively reduced
throughout the Park.
Parks Victoria has sunk six bores on the site
for the Friends group to monitor water tables
and salinity levels. Bores 1, 2 and 4 can be tested
by school groups with prior organisation with
Park staff.
Interesting
facts
The Park used to be a racetrack. Phar Lap was
stabled here. The stables burnt down in 1984. There
is a growing echidna population in the Park.
Access
to site
Download the maps of Braeside Park from ParkWeb at www.parkweb.vic.gov.au and follow the links to Braeside Park. See also the Location of fieldwork sites at Braeside Park map on this CD.
Parks Victoria is more than happy for you and your students to visit Braeside Park. If you would like to organise a visit you will need to do so in writing at least one month in advance by e-mailing the Chief Ranger at the Park on dlucas@parks.vic.gov.au. You can arrange to borrow the LandLearn fieldwork tub containing testing equipment (refundable deposit of $20 required) and a Ranger may be available on site to give a 10 minute introductory talk on the salinity issues in the Park – please request this in your e-mail.
The Park staff is very interested in your results and would appreciate you sharing your results with them. If students are testing surface and ground water quality, doing surveys, developing management plans for the area, the Park staff would be interested in their findings and recommendations.
Email your students’ work to the Park c/- the e-mail address above or post them to Braeside Park PO Box 608 Braeside Vic 3195. Your results will contribute to the management of the Park’s salinity problems.
Site Information
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The
site is in the south eastern suburb of Braeside. |
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There is bus access to a car park close to
the site - the best entrance is from Governor
Rd. Melways Reference 93 F2. This entrance
will lead you to the Red Gum picnic area and
car park (see Parks Victoria map www.parkweb.vic.gov.au). |
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There
are toilets on site - close to
the information shelter. |
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There
are picnic shelters adjacent to the car park
in case of inclement weather. |
Activities
to undertake at Braeside Park
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Combine
your visit with a wetland walk |
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There
have been 150 species of birds recorded on
the site - do a bird survey from the bird
hide at the northern end of the wetland where
there are bird identification pictures to
help you |
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Explore
the Heathland trail with its abundance of
plants - there is a very good Self Guided
Heathland Trail for Braeside Park on the Parks
Victoria website www.parkweb.vic.gov.au
and search under Braeside (access to the Heathland area must be arranged prior to your visit with Parks Victoria staff). |
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Do
some analysis of the ground water and rainfall
trends using the background information available.
Remember the Park staff is interested in your
results. |
Suggestions for
use of this resource
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The
fieldwork questions are divided into Levels
5 & 6 Humanities - Geography and VCE Geography. There are fieldtrip
questions and classroom questions in each
section. Teachers can select the questions
and activities best suited to their students,
the particular focus of the study and time
available. |
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It is suggested that some classwork or student
research on salinity is undertaken prior to
the fieldtrip to provide background to help
students better understand the issue. |
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If
possible, teach how to use the equipment for
monitoring prior to the fieldtrip (if you have equipment at your school). |
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Teachers' notes to accompany the student worksheets are included on the CD. |
Resource
To obtain a copy of 'Salinity in an Urban Landscape - Fieldwork in Braeside Park', complete the LandLearn order form [PDF 104KB]. This CD is available at a cost of $15.00.
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