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Ba1 Jetty near mouth

Active Physico-Chemical 09-10-2013 - 10-05-2023

Balcombe Creek Estuary

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68 results found (Displaying 31 - 40)
ID Date Status Details
#12674 27 Jan 2019 Approved Notes:

Turbidity measured with turbidity tube <10 at top and bottom
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.0 6.3 21.30 26.80 4.45 58.1 41.69
0.4m 10.0 6.1 21.60 33.80 4.94 68.7 51.40
#12415 23 Sep 2018 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 15.0 7.9 21.30 26.80 4.45 58.1 41.69
0.4m 15.0 7.9 21.60 33.80 4.94 68.7 51.40
#12392 26 Aug 2018 Approved Notes:

Drone image attached - Jetty Test Site 120 m August 2018

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.0 6.0 9.60 3.50 0.00 0.0 6.46
0.2m 10.0 6.0 11.10 30.20 0.00 0.0 46.42
#12388 22 Jul 2018 Approved Notes:

Depth was not measured, water over jetty (see image). Greater than 1m. Jan and Andrew Jones.

Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.0 7.7 9.60 3.50 0.00 0.0 6.46
0.2m 10.0 11.10 30.20 0.00 0.0 46.42
#12222 27 Jun 2018 Approved Notes:

I have had another look at the dissolved oxygen DO results for 27/6 as we were concerned about the very high readings. I went back to Augusta Street bridge the next day and took another reading which was considerably lower. Unfortunately I did not retest the other sites. I now believe that the meter was incorrectly calibrated so I think we should include a note to that effect on the data sheets. On re-reading the calibration data I did not allow enough time for the DO reading to stabilise.
I will allow more time for future calibrations. Jan Jones
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.0 6.6 9.60 3.50 0.00 0.0 6.46
0.2m 10.0 6.6 11.10 30.20 0.00 0.0 46.42
#12164 27 May 2018 Approved Notes:

No depth for 2 readings
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 40.0 6.2 9.60 3.50 0.00 0.0 6.46
0.2m 40.0 6.2 11.10 30.20 0.00 0.0 46.42
#12010 22 Apr 2018 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.0 7.7 15.00 18.70 9.66 108.8 30.00
1.0m 10.0 7.0 19.10 26.50 4.77 56.3 41.05
#12171 24 Mar 2018 Approved Notes:

Time approximate - not recorded on field data sheet
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.0 8.3 19.30 37.80 3.52 57.2 56.80
0.5m 10.0 8.1 19.20 38.10 2.67 36.1 57.10
#12176 25 Feb 2018 Approved Notes:

No stratification (sea water). Lack of stratification possibly due to the creek being very low (not flowing) for 2 months due to lack of rain. High tides and very strong westerlies (sometimes gale force) have probably pushed the seawater back up the estuary. The estuary flowing in reverse with resultant seawater.

All samples of nearly pure sea water.

Lower than usual pH samples. pH meter checked against standard afterwards.

Met with Peter O'Brien on Monday 19th at Augusta bridge site tot discuss last months data. He as going to investigate storm water drains, including current citation oval damage to explain high B.O.D. and EColi count.
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 15.0 6.0 20.30 34.60 2.37 38.7 52.40
0.6m 15.0 6.1 20.10 34.80 2.81 38.1 52.70
#11954 28 Jan 2018 Approved
Depth Turb NTU pH Temp ° C Salin ppt D.O. mg/L D.O. % sat EC mS/cm
0.1m 10.0 7.3 27.00 17.00 2.62 39.2 27.70
0.5m 10.0 6.9 27.00 17.10 3.25 45.8 27.96
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