Observation #12820 04-04-2019 | GMC: Gellibrand River Estuary Mouth Observation Site

Observation details

Overview

Estuary	Gellibrand River Estuary
Site	Gellibrand River Estuary Mouth Observation Site
Observation ID	#12820
Date and Time	Thursday 4th April 2019 12:55pm
Approved	Approved

Notes

Estimated height @ G6 0.68 - board unreadable because of silt build up

Dark discharge from reducing outflow around the mouth & to west, pale discharge continuing along foreshore to east. Entrance about 50m wide with sheer sides to channel from 1-2 m. high. Sand has built up on east side of channel -also directly downstream of rock. Longshore drift across mouth over sw swell with backwash return & some waves entering up the channel into the estuary. Waves are going high up on the beach at east end of beach which rises & falls creating some deep areas. Height of beach drops as it reaches the mouth

All tracks & roads are without water including low track where an extremely large number of small (1-3 cm) fish were actively swimming. Small fish were observed in all areas of estuary

D.O. levels @ G2 have greatly improved with flow going upstream while monitoring

Mouth Observation

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

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

Physical Condition

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

Water Levels and Tides

Water Level	Start	Finish
Height (m)	0.50m	0.50m
Time (hh:mm)	12:55	14:20
Tidal influence	Yes
Tidal Range	Time	Height
High	08:01	0.450
Low	13:42	0.790

Observation Documents

Link	Date	File name	Description
Download	05-04-2019 14:20	Gp1_20190404_1_212_025.JPG	gp1_1
Download	05-04-2019 14:20	Gp1_20190404_2_252_026.JPG	gp1_2
Download	05-04-2019 14:20	Gp1_20190404_3_292_027.JPG	gp1_3
Download	05-04-2019 14:20	Gp1_20190404_4_332_028.JPG	gp1_4
Download	05-04-2019 14:20	Gp1_20190404_5_372_029.JPG	gp1_5