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  5. 02-02-2020

ME_YGR023 Blackburn Lake at Heron Point opposite Naughton Gve Blackburn

2 February 2020

Overview Notes Phy Chem Tests Creatures Diary Photos 3
Site visit details

Overview

Catchment Yarra River
Site Blackburn Lake at Heron Point opposite Naughton Gve Blackburn ME_YGR023
Date and Time Sunday 2nd February 2020 10:40am
Approved Approved

Notes

Physical Chemical Tests

Ammon-Nit mg/L NH3-N N mg/L NH4+ D.O. % D.O mg/L EC µS/cm FrP mg/L P Nitrate-Nit mg/L N pH pH Units rP mg/L P Air ° C Water ° C Turb FTU Turb NTU
Sample 0 3.43 0.3 114 7 0.023 16 22 34
Weather sunny
Last rainfall During the last 24 hours 25.00
Flow estimate STAGNANT: No continuous flow in channel but channel continuous (in-stream habitats connected)
Water Appearance Muddy
Stream depth 1m - 2m
Stream width
Hazards
Litter/Pollutants bottles

Monitors: Tanveer Alvi, Elaine Boucher, Anne Payne, John Shortridge, Arhaan Alvi

Changes since last monitored: 

What stands out: Rocks more submerged. Seat not fixed but roped still.

Other Observations:

*The dissolved oxygen test was much like that at the 020 - The Landing - site:- When sulphuric acid added to sample to fix, the sample went pale in colour and the fragments formed were large and soft. On shaking the fragments did break a bit but were still larger than ever seen before. This reaction was less marked compared to site 020 but the reading is even lower.

 

Creatures Waterwatch method

Image Species Score Quantity
Caddis-fly Larvae (Trichoptera) Caddis-fly Larvae (Trichoptera) 7 1
Mayfly nymph (Ephemeroptera) Mayfly nymph (Ephemeroptera) 7 1
Damselfly Nymph (Odonata) Damselfly Nymph (Odonata) 6 2
Freshwater Shrimp/Prawn (Atyidae) Freshwater Shrimp/Prawn (Atyidae) 5 20
Yabbies/Marron/Gilgie Freshwater (Decapoda) Yabbies/Marron/Gilgie Freshwater (Decapoda) 5 3
True Bugs - Backswimmers, Water-boatmen, Water-striders (Hemiptera) True Bugs - Backswimmers, Water-boatmen, Water-striders (Hemiptera) 4 30
Total bug score
Total abundance 0 - 35 35+
0 - 200 Poor Good
200+ Fair Very good
Total abundance: 57 Total score: 34 Overall rating: Poor

Diary photos

Water level high following steady rainfall for last 3 days (25mm)

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