Observation #12762 11-03-2019 | GMC: Gellibrand River Estuary Mouth Observation Site

Observation details

Overview

Estuary	Gellibrand River Estuary
Site	Gellibrand River Estuary Mouth Observation Site
Observation ID	#12762
Date and Time	Monday 11th March 2019 11:00am
Approved	Approved

Notes

AHD G6 1.48 @ 10:25 -remaining same @ 14:53

Dark discharge out to east along side of shoreline.

Width of channel from estuary about 12 m. reducing to about 6m where it curves around rocks then increasing to about 15m wide as it flows out shallow over sand build up. The flow drops down to lower level as it passes rocks. Longshore drift across mouth travelling over incoming SW swell & outflow which is carrying a large amount of sand scoured out from start of & continuation of channel. Deeper areas occur in path of more rapid flow. Height of eastside of channel .10m at start from estuary rising to 1m. around rocks, sides continually collapsing into flow. Beach front now is in almost continuous straight line.

12:40 area of high sand removed from between 1st & 2nd rock resulting in faster flow with much scouring. 13:08 sea becoming more rough with waves entering over exposed rocks & travelling up into estuary

Mouth Observation

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

	Above Sea	Above Estuary
Berm Height (m)
Berm Length (m)

Physical Condition

	Current	Mode
Wind Direction	North-East
Beaufort Scale	Gentle breeze
Sea State	Rough

Water Levels and Tides

Water Level	Start	Finish
Height (m)	1.51m	1.50m
Time (hh:mm)	11:00	14:00
Tidal influence	Yes
Tidal Range	Time	Height
High	15:50	0.950
Low	09:34	0.300

Observation Documents

Link	Date	File name	Description
Download	13-03-2019 09:00	Gp1_20190311_1_212_017.JPG	gp1_1
Download	13-03-2019 09:00	Gp1_20190311_2_252_018.JPG	gp1_2
Download	13-03-2019 09:00	Gp1_20190311_3_292_019.JPG	gp1_3
Download	13-03-2019 09:00	Gp1_20190311_4_332_020.JPG	gp1_4
Download	13-03-2019 09:00	Gp1_20190311_5_372_021.JPG	gp1_5