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  5. 11-02-2023

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M1 Stanley Street

11 February 2023

Observation details

Overview

Estuary Merri River Estuary
Site Stanley Street
Observation ID #15278
Date and Time Saturday 11th February 2023 10:15am
Approved Approved

Notes

We returned to Edwards Bridge for this session.

Pacific black duck, Chestnut teal.

 

Jarred - thanks everyone for your monitoring.  Results are very interesting, particularly the low D.O, but I believe your values are true and have picked up on an algal bloom.  This is quite common in this part of the estuary, and i've since seen some very high and very low readings over each diurnal (daily) cycle as the algal produces oxygen during sunlight, and then consumes it during darkness!  

Depth Profiling

Depth m Temperature °C Salinity ppt D.O. mg/L D.O. % sat EC mS/cm Notes
0.1m 20.30 5.10 3.65 42.0 9.01
Previous 21.6 2.6 4.0 41.5 5.2
Median 15.4 1.80 7.36 71.20 3.8
0.5m 20.50 6.50 1.55 17.1 11.38
Previous 17.7 1.1 4.4 43.8 2.0
Median 15.2 1.80 7.36 71.20 3.5
1.0m 19.20 32.50 4.50 60.0 49.57
Previous 19.3 30.6 5.5 63.8 47.1
Median 15.6 25.60 5.71 65.80 40.0
1.5m 18.80 33.90 4.54 59.0 33.90
Previous 16.7 25.6 4.4 43.7 40.0
Median 15.4 23.20 5.71 65.80 36.6
1.9m 18.70 33.90 3.85 56.0 51.50
Previous 14.3 1.2 5.7 55.2 2.4
Median 15.4 23.20 5.75 68.10 36.6

Top-Bottom Sampling

Depth m Turbidity NTU pH
Top 0.1 9 6.8
Previous 0.1 9 7.1
Median 0.1 9 7.6
Bottom 2.0 9 7.0
Previous 1.4 9 7.4
Median 1.7 9 7.7

Other details

Max depth 2.10
Previous 1.50
Median 1.70
Flow estimate N/A

Observation Documents

Link Date File name Description

Preceding Observations

C Estuary is closed to the sea. O Estuary is open to the sea. P Perched
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