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Catchments
Yarra River Catchment
ME_YMR190
Site visits
20-12-2012
Merri Creek @ O'Hearns Rd, Somerton
Melbourne
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ME_YMR190 Yarra River Catchment
Thursday 20th December 2012 10:45am
Approved
Notes
Physical Chemical Tests
Ammonium
0
mg/L NH4+
Dissolved Oxygen % Saturation
110
%
Dissolved Oxygen mg/L
10.2
mg/L
Electrical Conductivity
1766
µS/cm
pH
8.24
pH Units
Reactive Phosphate (mg/L)
0.08
mg/L P
Temperature - AIR
20.6
° C
Temperature - WATER
19.8
° C
Turbidity - NTU
9
NTU
Water Conditions
Weather
Sunny
Last rainfall
During the last 24 hours
3
Flow estimate
Water Appearance
Clear
Stream depth
51cm - 99cm
Stream width
2m - 5m
Hazards
Litter/Pollutants
Water Bugs
Agreed Level Taxonomy Method
Image
Species
Score
Quantity
a. Family Hydropsychidae (net spinning caddis)
6
1
c. Family Veliidae/ Family Mesoveliidae/ Family Hebridae (water treaders)
3
6
e. Family Chironomidae, several genera (blood worms)
1
10
e. Family Hydrobiidae - Potamopyrgus antipodarum (species - snail)
1
4
e. Family Lestidae and Family Coenagrionidae (Damselfly nymph)
2
12
f. Corduliid / libellulid like dragonflies - various families (spider mud eye)
5
5
f. Order Amphipoda (scuds, sideswimmers)
3
40
g. Family Chironomidae (chironomids - True Fly larvae)
3
20
g. Family Physidae, Species Physa acuta (snail)
1
6
h. Family Dytiscidae, (taper-tailed tigers)
2
1
i. Family Aeshnidae (Dragonfly nymph - Couta mud eye)
5
10
i. Family Notonectidae , Genus Anisops (slender backswimmers)
1
8
l. Family Dytiscidae, various genera (stealth diving beetles)
1
1
m. Family Corixidae , Genus Micronecta (little brindle boatman)
2
200
p. Family Leptoceridae Unidentified, various genera (Caddis fly larvae)
6
50
t. Family Leptoceridae, Genus Notalina (Headbanger caddis)
6
5
ALT
Signal Score
3.25
Weighted
ALT
Signal Score
3.28
Diary photos
No diary entries recorded for this visit
Physical Chemical Trends
Loading chart
Test 1
Ammonia-Nitrogen
Ammonium
Dissolved Oxygen mg/L
Filterable Reactive Phosphorus
Nitrate - Nitrogen
Temperature - WATER
Temperature - AIR
pH
Electrical Conductivity
Reactive Phosphate (mg/L)
Dissolved Oxygen % Saturation
Turbidity - NTU
Test 2
Ammonia-Nitrogen
Ammonium
Dissolved Oxygen mg/L
Filterable Reactive Phosphorus
Nitrate - Nitrogen
Temperature - WATER
Temperature - AIR
pH
Electrical Conductivity
Reactive Phosphate (mg/L)
Dissolved Oxygen % Saturation
Turbidity - NTU
Mininum standard
Any level
Level 1
Level 2
Level 3
Level 4
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First data:
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