Observation #12831 24-03-2019 | GMC: Gellibrand River Estuary Mouth Observation Site

Observation details

Overview

Estuary	Gellibrand River Estuary
Site	Gellibrand River Estuary Mouth Observation Site
Observation ID	#12831
Date and Time	Sunday 24th March 2019 09:14am
Approved	Approved

Notes

AHD G2 1.57 @ 09:14 but between 1.57 & 1.58 @ 12:35 AHD G6 1.52 @ 08:40

Observations made at low tide.

Mouth opened at low tide between rocks at base of cliff not through the berm sand build up which remained intact. Flow from estuary was coming down through a channel about 3-4 m across widening to 7m where it sharply curved west towards cliff - height of channel east side in that area 1m. Depth about .10-.20m . Waves had been overtopping the berm at last hi tide & running down west along the beach towards cliff along the sand behind the berm travelling down a previously formed depression. The beach rises & falls creating wide N-S depressions. High wave sets impacting on sandbar & going high up on beach = backwash & longshore drift.

Very large no. small fish in shallow water around estuary & in water at edge of roads. Peregrine falcon at entrance

Mouth Observation

Mouth state	Open
Previous	C C C C C C O O O O O C O O O O O O O O O O O O O O O O O O O O O C O O O O C O O O O O O C C C C C C C C O O O C C C C C
Flow Present?	Yes
Previous	N N N N N N Y Y Y Y Y N Y Y Y Y Y Y Y Y Y Y Y N Y Y Y Y Y Y Y Y Y N Y Y Y Y N Y Y Y Y Y Y N N N N N N N N Y Y Y N N N N N
Flow Direction	In
Previous	N N N N N N O O O O O N O I O O O I O O I O O N O I O O O O O O O N O O O O N O O O O O I N N N N N N N N O O O N N N N N

	Above Sea	Above Estuary
Berm Height (m)	1.1m	0.1m
Berm Length (m)	0.0m

Physical Condition

	Current	Mode
Wind Direction	North
Beaufort Scale	Light Breeze
Sea State	Moderate

Water Levels and Tides

Water Level	Start	Finish
Height (m)	1.57m	1.57m
Time (hh:mm)	09:14	12:35
Tidal influence	No
Tidal Range	Time	Height
High	14:31	1.040
Low	08:20	0.270

Observation Documents

Link	Date	File name	Description
Download	08-04-2019 07:25	Gp1_20190324_1_212_030.JPG	gp1_1
Download	08-04-2019 07:25	Gp1_20190324_2_252_031.JPG	gp1_2
Download	08-04-2019 07:25	Gp1_20190324_3_292_032.JPG	gp1_3
Download	08-04-2019 07:25	Gp1_20190324_4_332_033.JPG	gp1_4
Download	08-04-2019 07:25	Gp1_20190324_5_372_034.JPG	gp1_5