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GMC Gellibrand River Estuary Mouth Observation Site

11 March 2019

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
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 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
13-03-2019 09:00 Gp1_20190311_1_212_017.JPG gp1_1
13-03-2019 09:00 Gp1_20190311_2_252_018.JPG gp1_2
13-03-2019 09:00 Gp1_20190311_3_292_019.JPG gp1_3
13-03-2019 09:00 Gp1_20190311_4_332_020.JPG gp1_4
13-03-2019 09:00 Gp1_20190311_5_372_021.JPG gp1_5
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