Observation details

Overview

Estuary Gellibrand River Estuary
Site Old Coach Road Bridge Princetown
Observation ID #11894
Date and Time Friday 16th March 2018 10:25am
Approved Approved

Notes

CCMA's YEOKEL meter used for monitoring

AHD G6 0.65 @ 08:00    0.71 @   14:46

AHD G2 0.71 @ 10:25     0.75 @   13:35

NTU's 70 @ 0.50 depth at halocline, rising at top of salt wedge then increasing with depth

Only intermittent waves overtopping berm over a high sand build up at recently opened entrance (20-03-18) . No exchange or out flow from estuary

Flats from G4 & Latrobe creek draining into river channel

 

Depth Profiling

Depth m Temperature °C Salinity ppt D.O. mg/L D.O. % sat EC mS/cm Notes
0.1m 18.50 0.40 5.36 58.3 2.70
Previous 20.6 1.6 4.3 48.2 3.1
Median 17.8 1.80 6.92 71.90 3.5
0.5m 17.80 0.50 6.82 54.0 2.80
Previous 17.8 1.3 3.1 33.1 2.7
Median 17.8 1.80 7.12 72.50 3.5
1.0m 18.80 3.30 1.19 13.2 6.26 NTU's 70 at halocline - verry erratic
Previous 18.8 1.9 3.2 34.3 3.6
Median 18.0 2.40 6.88 71.00 4.5
1.5m 18.20 12.90 3.73 41.9 21.75
Previous 17.7 13.3 4.2 47.2 21.9
Median 18.0 2.80 6.97 71.00 5.2
2.0m 18.20 21.00 4.36 58.2 33.31
Previous 17.6 24.6 4.5 54.9 39.0
Median 17.1 17.00 5.79 64.30 27.6
2.5m 18.00 25.60 3.94 48.7 40.10
Previous 17.4 25.8 6.0 72.4 40.1
Median 17.1 17.00 5.92 65.60 27.6
3.0m 18.00 27.30 3.46 43.0 42.57
Previous 17.6 27.4 3.1 39.0 42.5
Median 17.6 29.60 3.38 41.50 45.6
3.5m 18.10 28.30 2.05 26.1 43.91 NTU's 43.2 erratic (40-50)
Previous 17.6 27.6 4.2 51.3 42.9
Median 17.2 29.60 3.38 41.50 45.6
4.0m 18.00 28.60 0.99 12.6 44.39
Previous 17.7 27.8 2.1 26.2 43.1
Median 18.0 31.80 1.05 11.60 48.5
4.1m 18.00 28.80 0.44 5.5 44.59 NTU's 49.1
Previous 18.3 31.8 0.0 0.3 48.5
Median 18.0 31.80 0.64 8.40 48.5

Top-Bottom Sampling

Depth m Turbidity NTU pH
Top 0.1 12 6.8
Previous 0.1 9 6.6
Median 0.1 9 6.8
Bottom 4.1 43 6.9
Previous 4.1 10 6.9
Median 4.2 14 7.2

Other details

Max depth 4.18
Previous 4.21
Median 4.30
Flow estimate Pool

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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