Observation #11913 23-03-2018 | GMC: Gellibrand River Estuary Mouth Observation Site

Observation details

Overview

Estuary	Gellibrand River Estuary
Site	Gellibrand River Estuary Mouth Observation Site
Observation ID	#11913
Date and Time	Friday 23rd March 2018 13:30pm
Approved	Approved

Notes

Entrance barred but waves over during high tide, very large amount of fresh seaweed on beach beside front of estuary, down E side of channel & around onto sand at south side in front of dunes. Water in estuary being driven south towards berm by N wind (4-5) = waves down channel. Wind in many directions in other places but mainly around 2-3. Colour of water in estuary upstream to G2 is greenish brown indicating salt water going upstream. This was confirmed by depth profile taken at G2 & Lt1

SW swell impacting last 1/4 of beach (east end) with backwash taking out sand - visible out to sea, only very slight longshore drift from 2nd lessor impact at mid beach

Estuary only .20m above the berm, slight rise near ocean is 78.3m. from estuary front, then from that area to a dynamic variable swash line 7.3m. = total of 85.6m.

Very gentle slope down to ocean from estuary interrupted only by a small rise in front of estuary and an area close to ocean

Mouth Observation

Mouth state	Closed
Previous	C O 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 O O O O O O P C C C C C C C O O O O C C
Flow Present?	No
Previous	N N N N N Y Y Y Y Y N Y Y Y N Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y N N N N N N N N Y Y Y Y N N
Flow Direction	N/A
Previous	N N N N N O O O O O N O O O N O O O O O O O O O O O O O O O O O O O O O O O N N N N N N N N O I O O N N

	Above Sea	Above Estuary
Berm Height (m)		0.2m
Berm Length (m)	85.6m

Physical Condition

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

Water Levels and Tides

Water Level	Start	Finish
Height (m)	1.19m	1.19m
Time (hh:mm)	13:30	14:50
Tidal influence	No
Tidal Range	Time	Height
High	16:38	1.000
Low	09:35	0.220

Observation Documents

Link	Date	File name	Description
Download	25-03-2018 10:55	Gp1_20180323_1_212031.JPG	gp1_1
Download	25-03-2018 10:55	Gp1_20180323_2_252032.JPG	gp1_2
Download	25-03-2018 10:55	Gp1_20180323_3_292_033.JPG	gp1_3
Download	25-03-2018 10:55	Gp1_20180323_4_332_034.JPG	gp1_4
Download	25-03-2018 10:55	Gp1_20180323_5_372_035.JPG	gp1_5