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G2 Old Coach Road Bridge Princetown

20 June 2025

Observation details

Overview

Estuary Gellibrand River Estuary
Site Old Coach Road Bridge Princetown
Observation ID #17023
Date and Time Friday 20th June 2025 11:15am
Approved Approved

Notes

Debra Ferrari - sampler

The bottom of the water bottle broke off before we were able to perform the bottom sampling - turbidity & pH so unable to captur

Depth Profiling

Depth m Temperature °C Salinity ppt D.O. mg/L D.O. % sat EC mS/cm Notes
0.1m 9.60 5.00 11.03 102.7 6.29
Previous 14.8 6.2 4.8 50.8 8.8
Median 14.9 2.10 8.26 85.30 3.5
0.5m 9.40 5.40 10.96 101.8 6.70
Previous 17.7 3.0 8.3 92.4 4.4
Median 17.2 2.10 8.27 85.70 3.5
1.0m 9.50 7.50 10.31 99.9 9.20 Estimate - average - unstable
Previous 16.1 18.2 4.4 47.5 26.0
Median 16.4 3.60 8.27 87.70 5.5
1.5m 11.60 29.50 10.54 102.3 34.00 ”unstable reading”
Previous 17.7 3.0 8.2 91.0 4.4
Median 17.1 3.00 8.31 88.60 5.5
2.0m 13.50 40.80 8.72 89.4 47.50
Previous 16.8 28.2 8.6 94.2 40.3
Median 16.5 28.90 8.02 84.60 42.2
2.5m 13.80 35.10 9.15 94.2 50.20
Previous 18.3 23.9 2.7 30.9 34.2
Median 16.5 28.90 8.02 84.60 43.2
3.0m 14.00 35.60 8.74 90.3 50.80
Previous 18.0 33.5 2.0 22.5 47.8
Median 16.5 33.50 6.73 70.30 47.5
3.5m 14.10 35.80 7.99 82.8 51.20
Previous 19.9 32.9 0.2 2.0 47.0
Median 16.4 34.40 6.73 70.30 47.2
3.8m 14.10 35.80 7.82 81.1 51.20
Previous 20.2 33.5 1.5 18.1 47.8
Median 16.4 34.40 7.00 78.70 47.5

Top-Bottom Sampling

Depth m Turbidity NTU pH
Top 0.1 9 7.4
Previous 0.1 9 7.3
Median 0.1 10 7.1
Bottom 3.8
Previous 4.8 17 7.0
Median 3.9 19 7.2

Other details

Max depth 3.90
Previous 4.88
Median 4.00
Flow estimate Slow

Observation Documents

Link Date File name Description

Download 		22-06-2025 16:29 image_9.jpg

Download 		22-06-2025 16:29 IMG_7092.jpeg gp1_2

Preceding Observations

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