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GMC Gellibrand River Estuary Mouth Observation Site

23 March 2018

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
Flow Present? No
Previous
Flow Direction N/A
Previous
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
25-03-2018 10:55 Gp1_20180323_1_212031.JPG gp1_1
25-03-2018 10:55 Gp1_20180323_2_252032.JPG gp1_2
25-03-2018 10:55 Gp1_20180323_3_292_033.JPG gp1_3
25-03-2018 10:55 Gp1_20180323_4_332_034.JPG gp1_4
25-03-2018 10:55 Gp1_20180323_5_372_035.JPG gp1_5
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