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H4 Site four (Jubilee Park)

19 July 2026

Observation details

Overview

Estuary Hopkins River Estuary
Site Site four (Jubilee Park)
Observation ID #17657
Date and Time Sunday 19th July 2026 14:00pm
Approved Approved

Notes

rotten egg smell, very turbid and smelly.

Noted, thanks - most likely due to recent flow and turbulence which has mobilised upstream anoxic sediments that may have been sitting in the bottom of the upper estuary/river for some time.  Highlights the importance of annual rainfall and freshwater flushing!

Quite amazing that the salt layer remains this far up the system & at 1.5m depth!  It will be very interesting to see how the August results compare, now that we've had another 1 month of rainfall and streamflow.  

Thanks Jarred.

 

 

Depth Profiling

Depth m Temperature °C Salinity ppt D.O. mg/L D.O. % sat EC mS/cm Notes
0.1m 11.40 1.50 9.85 89.3 2.87
Previous 13.2 1.3 9.0 84.7 2.3
Median 17.5 5.30 9.70 103.00 9.6
0.5m 11.00 1.50 9.61 86.2 2.89
Previous 16.1 9.1 9.5 101.3 15.5
Median 17.8 5.70 9.72 103.10 10.0
1.0m 10.90 1.60 9.26 82.8 2.94
Previous 13.5 14.3 2.9 29.5 23.9
Median 17.3 15.00 7.89 89.50 24.6
1.5m 12.00 25.40 0.55 5.4 39.92
Previous 16.0 11.0 9.1 97.7 18.7
Median 17.7 15.60 7.98 90.80 25.6

Top-Bottom Sampling

Depth m Turbidity NTU pH
Top 0.1 22 8.0
Previous 0.1 11 7.6
Median 0.1 9 8.3
Bottom 1.8 39 7.5
Previous 2.0 9 7.5
Median 2.0 9 8.1

Other details

Max depth 1.90
Previous 2.10
Median 2.10
Flow estimate N/A

Observation Documents

Link Date File name Description
Download 19-07-2026 16:50 img20260719_16272206.pdf

Preceding Observations

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