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Observation details

Overview

Estuary Merri River Estuary
Site Fonterra Floating Pontoon
Observation ID #15836
Date and Time Saturday 11th November 2023 09:40am
Approved Approved

Notes

Possible dissolved oxygen issue with YSI meter.  Please check

Thanks guys - D.O. readings are high, but quite likely correct due to algae presence producing excess oxygen.  This is quite typical at this time of year due to extended sunlight and warming summer conditons.  Thanks for noticing the high level though - Jarred.

Depth Profiling

Depth m Temperature °C Salinity ppt D.O. mg/L D.O. % sat EC mS/cm Notes
0.1m 20.50 1.30 14.44 155.6 2.44
Previous 16.3 1.4 14.1 145.3 2.7
Median 16.3 1.20 8.94 86.10 2.4
0.5m 20.40 1.30 15.08 160.7 2.44
Previous 11.7 1.3 12.4 113.6 2.6
Median 15.6 1.20 8.48 81.40 2.3
1.0m 20.30 1.30 15.14 169.1 2.45
Previous 16.3 1.4 13.7 141.2 2.7
Median 16.3 1.20 8.28 79.80 2.4
1.5m 20.20 1.30 13.98 151.8 2.45
Previous 11.6 1.3 12.0 109.1 2.6
Median 15.1 1.20 8.18 76.20 2.3

Top-Bottom Sampling

Depth m Turbidity NTU pH
Top 0.1 12 8.3
Previous 0.1 12 8.4
Median 0.1 13 8.2
Bottom 1.5 17 8.2
Previous 1.5 12 8.5
Median 1.6 13 8.1

Other details

Max depth 1.60
Previous 1.70
Median 1.75
Flow estimate Slow

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