EstuaryWatch Observations

Hopkins River Estuary

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161 results found (Displaying 11 - 20)

Date

Status

Details

#15582

17 Jun 2023

Approved

Notes:

Distinct top outward flowing layer, and inward flowing bottom layer, with changeover at approx 2 metres depth.

strong NE wind

img20230617_15422773.pdf

Depth	Turb NTU	pH	Temp ° C	Salin ppt	D.O. mg/L	D.O. % sat	EC mS/cm
0.1m	12.5	7.6	11.50	6.30	9.48	91.2
4.3m	12.5	7.6	13.90	32.90	5.81	69.6	50.10

#15543

20 May 2023

Approved

img20230520_16524661.pdf

Depth	Turb NTU	pH	Temp ° C	Salin ppt	D.O. mg/L	D.O. % sat	EC mS/cm
0.1m	9.0	8.0	14.90	27.20	8.05	94.8	43.10
3.5m	9.0	7.9	15.40	37.70	7.84	98.5	56.70

#15461

15 Apr 2023

Approved

Notes:

Van Dorn sampler forgotten so pH and turbidity levels not available

- No worries, easy done! Based on the EC readings it looks like we've got a WQ profile almost entirely of seawater anyway!! Thanks Jarred.

img20230415_15450534.pdf

Depth	Turb NTU	pH	Temp ° C	Salin ppt	D.O. mg/L	D.O. % sat	EC mS/cm
0.1m			17.10	30.60	7.60	96.4	46.77
3.5m			17.00	37.10	5.79	76.1	55.80

#15352

17 Mar 2023

Approved

Notes:

Assisted by Sandro

img20230318_15120838.pdf

Depth	Turb NTU	pH	Temp ° C	Salin ppt	D.O. mg/L	D.O. % sat	EC mS/cm
0.1m	9.0	7.8	20.40	36.80	7.10	97.2	55.40
3.2m	9.0	8.0	18.30	38.00	6.23	82.4	57.00

#15298

17 Feb 2023

Approved

Notes:

Assisted by Steve Selman.

Great results everyone - amazing salty after an exceptional 8m swell earlier in the month!

img20230220_10055218.pdf

Depth	Turb NTU	pH	Temp ° C	Salin ppt	D.O. mg/L	D.O. % sat	EC mS/cm
0.1m	9.0	8.0	21.00	32.20	7.16	96.4	49.10
3.0m	9.0	8.0	20.20	33.50	5.54	74.2	51.00

#15250

20 Jan 2023

Approved

img20230121_17465508.pdf

Depth	Turb NTU	pH	Temp ° C	Salin ppt	D.O. mg/L	D.O. % sat	EC mS/cm
0.1m	13.0	8.3	20.10	18.60	9.11	112.0	30.04
3.2m	13.0	8.2	17.00	33.40	7.36	92.2	50.80

#15173

14 Dec 2022

Approved

Notes:

Jarred - thanks everyone, great results which indicate a changing season!! Great to see the return of the salt wedge, and although still very seasonally high the turbidity readings are on the way down!

img20221215_11490568.pdf

Depth	Turb NTU	pH	Temp ° C	Salin ppt	D.O. mg/L	D.O. % sat	EC mS/cm
0.1m	35.0	7.8	17.70	2.50	9.29	98.5	4.61
3.5m	35.0	7.8	15.90	32.50	7.03	86.1	49.80

#15141

18 Nov 2022

Approved

Notes:

Probe and Van Doorn horizontal in water because of rapid flow, so lower depths not tested or sampled.

Thanks Brad & Dina, and yes no worries regarding the flow and challenges sampling at depth. Very well mixed profile so this alleviates any issues. Very high turbidity remains! Thanks Jarred.

img20221119_17532899.pdf

Depth	Turb NTU	pH	Temp ° C	Salin ppt	D.O. mg/L	D.O. % sat	EC mS/cm
0.1m	57.0	7.6	17.30	0.60	9.34	98.2	1.21
3.0m	57.0		17.20	0.60	9.35	98.2	1.21

#15072

14 Oct 2022

Approved

Notes:

River flowing very quickly; all samples taken with ropes at significant angulation due to flow.

High level floods upstream

High tide 20.00

Great work everyone & appreciate you making the correct call to not sampling H2 due to flooding risks. Perfect timing regarding the flood peak on the Hopkins estuary (3am the following morning at 1.82m AHD), with a highly turbid, fresh and well mixed profile. Amazing mouth scouring/widening too!!

img20221015_12253361.pdf

Depth	Turb NTU	pH	Temp ° C	Salin ppt	D.O. mg/L	D.O. % sat	EC mS/cm
0.1m	65.0	8.5	14.70	0.80	8.86	87.6	1.60
5.0m	65.0	8.5	14.80	1.90	8.37	83.7	3.14

#15018

17 Sep 2022

Approved

Notes:

Bottom pH is <9. Med- Fast flowing out to sea.

Mouth photos attached here.

Thanks Brad. Very interesting to see quite a lot of tidal/ocean influence still pushing up the estuary, however this may disappear soon! Great D.O. profile throughout.