Site visit details

Overview

Catchment Dandenong
Site Tirhatuan Wetlands, off Dandenong Creek, Rowville ME_DTW100
Date and Time Sunday 30th September 2018 10:00am
Approved Approved

Notes

Physical Chemical Tests

N mg/L NH4+ D.O. % D.O mg/L EC µS/cm pH pH Units rP mg/L P Air ° C Water ° C Turb FTU
Sample 0 108.94 11 270 9.1 0.03 17.9 14.9 30
Weather cloudy
Last rainfall During the last 24 hours
Flow estimate PERMANENT: wetlands and lakes
Water Appearance Clear
Stream depth
Stream width
Hazards
Litter/Pollutants

Depth about 0.4m

The first pH test (PR) gave a bright pink result (see pictures). The second, with TB, gave 9.1 then a repeat TB gave 9.3. DO was also abnormally high. This is similar to two events we have had previously, on 2 Feb 2014 in the Dandenong Creek when the pH and DO were both out of range, and on 22 Oct 2014 in the Dandenong Wetlands when the pH was overrange and DO was high on one test and out of range on another. 

Creatures Waterwatch method

Image Species Score Quantity
Damselfly Nymph (Odonata) Damselfly Nymph (Odonata) 6 3
Water mites (Acarina) Water mites (Acarina) 5 2
Aquatic Beetles - Diving Beetles, Whirligig Beetles (Coleoptera) Aquatic Beetles - Diving Beetles, Whirligig Beetles (Coleoptera) 3 9
Beetle larvae (Coleoptera) Beetle larvae (Coleoptera) 4 1
Mosquito Larvae (Diptera) Mosquito Larvae (Diptera) 2 10
Non Biting Midge Larvae - Bloodworms (Diptera) Non Biting Midge Larvae - Bloodworms (Diptera) 1 3
Segmented Worm (Oligochaeta) Segmented Worm (Oligochaeta) 1 2
Total bug score
Total abundance 0 - 35 35+
0 - 200 Poor Good
200+ Fair Very good
Total abundance: 30 Total score: 22 Overall rating: Poor

Diary photos

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