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  6. 21-04-2011

Merri Creek @ O'Hearns Rd, Somerton

Melbourne

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ME_YMR190 Yarra River Catchment

Thursday 21st April 2011 14:30pm Approved
Notes

Physical Chemical Tests

Ammonium
0.02mg/L NH4+
Dissolved Oxygen % Saturation
86.52%
Dissolved Oxygen mg/L
8mg/L
Electrical Conductivity
420µS/cm
pH
8.2pH Units
Reactive Phosphate (mg/L)
0.1mg/L P
Temperature - AIR
23.1° C
Temperature - WATER
19.1° C
Turbidity - NTU
6NTU

Water Conditions

Weather
Sunny
Last rainfall
During the last 24 hours
Flow estimate
 
Water Appearance
Other
Stream depth
 
Stream width
 
Hazards
 
Litter/Pollutants
 

Water Bugs WaterWatch method

Image Species Score Quantity
Image
Caddis-fly Larvae (Trichoptera) 7 4
Image
Mayfly nymph (Ephemeroptera) 7 1
Image
Damselfly Nymph (Odonata) 6 6
Image
Freshwater Shrimp/Prawn (Atyidae) 5 1
Image
Freshwater Snails (Gastropoda) 3 25
Image
Side Swimmer/Scud (Amphipoda) 4 10
Image
True Bugs - Backswimmers, Water-boatmen, Water-striders (Hemiptera) 4 30
Image
Biting Midge Larvae (Diptera) 2 15
Total bug score
Total abundance 0 - 35 35+
0 - 200 Poor Good
200+ Fair Very good
Total abundance: 92 Total score: 38 Overall rating: Good

Diary photos

Physical Chemical Trends

Last data:
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