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GMC Gellibrand River Estuary Mouth Observation Site

19 April 2018

Observation details

Overview

Estuary Gellibrand River Estuary
Site Gellibrand River Estuary Mouth Observation Site
Observation ID #12001
Date and Time Thursday 19th April 2018 07:25am
Approved Approved

Notes

Artificial opening occurred @ 09:10. No flow before opening but waves had been over the berm reaching the estuary at last hi tide. Tidal range both very high & low 1.17 - 0.27

Beach formation had changed into 2 separate small bays divided by a sand projection at mid beach. East end of beach was being strongly impacted by SW swell reducing the sand 'cliffs' formed earlier.. Area west of sand spit only slightly impacted

Slight pale discharge only around the mouth & travelling west just after opening. Large amount of sand visible in water. About 10:30 waves started going up 1st part of channel  - backwash carrying out sand. Slight longshore drift across mouth

GOR -water 3/4 way across right lane. OOR Water over large area near flood markers (very large no. Ibis in flooded areas.

Mouth Observation

Mouth state Open
Previous
Flow Present? Yes
Previous
Flow Direction Out
Previous
Above Sea Above Estuary
Berm Height (m)
Berm Length (m)

Physical Condition

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

Water Levels and Tides

Water Level Start Finish
Height (m) 1.69m 1.70m
Time (hh:mm) 07:25 11:25
Tidal influence No
Tidal Range Time Height
High 14:24 1.170
Low 07:23 0.270

Observation Documents

Link Date File name Description
28-04-2018 11:00 Gp1_20180419_1_212_0185.JPG gp1_1
28-04-2018 11:00 Gp1_20180419_2_252_0186.JPG gp1_2
28-04-2018 11:00 Gp1_20180419_3_292_0187.JPG gp1_3
28-04-2018 11:00 Gp1_20180419_4_332_0188.JPG gp1_4
28-04-2018 11:00 Gp1_20180419_5_372_0189.JPG gp1_5
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