Observation #11662 15-12-2017 | GMC: Gellibrand River Estuary Mouth Observation Site

Observation details

Overview

Estuary	Gellibrand River Estuary
Site	Gellibrand River Estuary Mouth Observation Site
Observation ID	#11662
Date and Time	Friday 15th December 2017 11:07am
Approved	Approved

Notes

Very slight pale discharge going out to sea just east of entrance. Reducing flow despite observations being taken close to hi tide Only very narrow shallow channel flowing between last rock & cliff. Waves however are entering over wider area & going across from east side of rocks to cliff. Beach very flat with sand build up extending nearly across the entrance. Recent swash lines indicate waves going far up on beach. Backwash areas at mid beach are being scoured out into shallow N/S depressions. A lot of sand visible in breakers in that area & also directly out from mouth. Only part of sand bar visible

Algae in shallow water beside low track. Some in various stages of decomposition. Large no. small bubbles in one area. Moths wings also in these areas. In the shallow water along side low track there are large no. small very active fish. 6 White headed Herons actively feeding in these areas

Red silt/algae over dark black slimy deposit noted in shallow water of estuary at start of low track

Mouth Observation

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

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

Physical Condition

	Current	Mode
Wind Direction	South-West
Beaufort Scale	Gentle breeze
Sea State	Rough

Water Levels and Tides

Water Level	Start	Finish
Height (m)	0.62m	0.65m
Time (hh:mm)	11:07	13:05
Tidal influence	Yes
Tidal Range	Time	Height
High	12:44	0.880
Low	17:11	0.350

Observation Documents

Link	Date	File name	Description
Download	16-12-2017 15:15	Gp1_20171215_1_212_9780.JPG	gp1_1
Download	16-12-2017 15:15	Gp1_20171215_2_252_9781.JPG	gp1_2
Download	16-12-2017 15:15	Gp1_20171215_3_292_9782.JPG	gp1_3
Download	16-12-2017 15:15	Gp1_20171215_4_332_9783.JPG	gp1_4
Download	16-12-2017 15:15	Gp1_20171215_5_372_9784.JPG	gp1_5