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G2 Old Coach Road Bridge Princetown

Active Physico-Chemical 20-04-2007 - 21-07-2023

Gellibrand River Estuary

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628 results found (Displaying 61 - 70)
ID Date Status Details
#13003 21 Dec 2018 Approved Notes:

IEC site Mouth Open

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.3 7.0 18.10 0.90 7.69 81.8 1.83
3.6m 10.3 7.2 16.40 33.60 2.22 27.6 51.16
#12576 8 Dec 2018 Approved Notes:

AHD G2 0.56 @ 09:50     G6  0.98 @ 09:40

SE Wind bringing waves to G2 making flow estimate very difficult

After a short duration closure the mouth opened naturally on 06-12-18,             40C. heat on 07-12-18.

Low water level in estuary with sand bar partially exposed & drying algae draped over veg. at E side of estuary. Waves entering shallow over wide area / dense sea mist & air temp about 18C.
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 20.50 2.60 6.89 77.1 4.79
3.9m 16.10 31.10 6.35 77.7 47.79
#13002 23 Nov 2018 Approved Notes:

IEC Site. Mouth Open.

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 8.9 7.6 15.40 1.70 9.02 91.5 3.20
4.2m 8.9 8.3 15.50 33.60 8.25 101.4 51.21
#12538 16 Nov 2018 Approved Notes:

AHD 0.58

Large amount of silt settling rapidly  in turbidity / pH  sample
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 13.0 7.1 17.10 3.80 7.28 77.7 6.89
3.8m 13.0 7.8 15.90 33.30 6.81 87.7 50.60
#12528 13 Nov 2018 Approved Notes:

AHD G2 0.34  @ 13:00     G6 1.01 @ 11:17 AHD boards partially obscured with silt
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 17.50 1.00 7.40 77.9 2.03
3.6m 15.80 28.60 6.82 82.0 44.28
#12526 11 Nov 2018 Approved Notes:

AHD G6 1.64 @ 10:54  G2  1.54 @ 10;03

Mouth was actually open during monitoring. Fishermen reported estuary water trickling out at night on 10-11-18 & open am. on 11-11-18.                                  Mouth was perched on 04-11-18, closed on 05-11-18  & opened again on 11-11-18
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 9.0 6.6 16.50 1.00 6.33 65.3 2.02
4.9m 9.0 7.0 14.50 28.80 1.23 14.3 44.53
#12452 19 Oct 2018 Approved Notes:

No weights were used as flow was not as strong as upstream
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 21.0 6.2 15.80 0.80 7.06 71.8 1.58
3.8m 21.0 7.0 13.20 13.20 2.18 24.5 41.06
#12405 21 Sep 2018 Approved Notes:

AHD   G2  0.49 @ 10:23    G6 1.95 @  08:15

Bearer under bridge fractured 31-08-2018 (bridge closed) repair completed to 15 T load limit on 20-09-18
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 12.0 6.9 10.80 0.40 9.27 84.1 0.73
3.8m 12.0 7.0 11.60 15.20 5.71 63.0 24.91
#12340 17 Aug 2018 Approved Notes:

AHD G6 over AHD board  @  07:48      G2 0.65  @ 09:35

Turbidity G6  34 NTUs pH 6.8

Very cold North wind 5

Monitoring difficult because of  very fast flow. Probe attached to rope with 4 weights. The use of weights raised the height of the probe above 10 cm  from the bottom both at G2 & Lt1

The turbidity water sampler was possibly dragged about 5m.downstream in the  very fast flow so bottom readings may not be accurate
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 27.0 7.4 10.00 0.20 7.34 65.1 0.32
3.9m 27.0 6.6 10.10 0.20 6.91 61.3 0.35
#12283 21 Jul 2018 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 Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 17.0 7.4 8.60 0.90 8.42 72.5 1.79
3.3m 17.0 7.1 8.40 1.80 7.43 64.2 3.12
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