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  4. 21-07-2018

G2 Old Coach Road Bridge Princetown

21 July 2018

Overview Notes Depth Profile Top-Bottom Documents 1 Chart
Observation details

Overview

Estuary Gellibrand River Estuary
Site Old Coach Road Bridge Princetown
Observation ID #12283
Date and Time Saturday 21st July 2018 09:33am
Approved Approved

Notes

AHD 0.95 @ 09:23  ( G2 was 1.36 @ 15:00 on 20-07-18)                                   G6  3.03 @ 08:47

Strong tidal influence over night

Bottom turbidity sample contained many small particles

Flats have drained downstream of G4 but not upstream where deep water cover exists across the flood plain

Depth Profiling

Depth m Temperature °C Salinity ppt D.O. mg/L D.O. % sat EC mS/cm Notes
0.1m 8.60 0.90 8.42 72.5 1.79 E.C. slightly erratic
Previous 8.4 0.2 9.3 79.3 0.4
Median 18.0 1.80 7.12 71.40 3.5
0.5m 8.60 1.00 7.94 68.8 1.40 " "
Previous 8.5 0.2 7.4 63.4 0.3
Median 18.0 1.80 6.85 71.30 3.5
1.0m 8.60 1.00 8.26 71.2 2.01
Previous 8.3 0.2 9.2 78.1 0.4
Median 18.2 3.60 6.72 71.00 6.6
1.5m 8.60 1.10 8.01 69.1 2.02
Previous 8.5 0.2 7.4 63.7 0.4
Median 18.2 3.60 6.55 70.80 6.6
2.0m 8.50 1.20 7.95 68.7 2.37
Previous 8.3 0.2 9.2 78.3 0.4
Median 17.6 23.10 6.17 69.00 36.4
2.5m 8.50 1.20 7.78 66.9 2.45
Previous 8.5 0.2 7.4 63.7 0.4
Median 17.6 23.10 5.95 69.00 36.4
3.0m 8.50 1.40 7.67 66.3 2.65 E.C. erratic
Previous 8.3 0.2 9.0 76.7 0.4
Median 17.9 30.70 3.58 47.00 47.1
3.3m 8.40 1.80 7.43 64.2 3.12
Previous 8.6 0.2 7.4 63.5 0.4
Median 17.9 31.10 3.58 47.00 47.7

Top-Bottom Sampling

Depth m Turbidity NTU pH
Top 0.1 17 7.4
Previous 0.1 20 6.1
Median 0.1 11 6.9
Bottom 3.3 30 7.1
Previous 4.2 9 7.9
Median 4.2 12 7.2

Other details

Max depth 3.43
Previous 4.35
Median 4.30
Flow estimate Fast

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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