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GMC Gellibrand River Estuary Mouth Observation Site

24 March 2019

Observation details

Overview

Estuary Gellibrand River Estuary
Site Gellibrand River Estuary Mouth Observation Site
Observation ID #12831
Date and Time Sunday 24th March 2019 09:14am
Approved Approved

Notes

AHD G2 1.57 @ 09:14 but between 1.57 & 1.58 @ 12:35  AHD G6 1.52 @ 08:40

Observations made at low tide.

Mouth opened at low tide between rocks at base of cliff not through the berm sand build up which remained intact. Flow from estuary was coming down through a channel about 3-4 m across widening to 7m where it sharply curved west towards cliff - height of channel east side in that area 1m.  Depth about .10-.20m . Waves had been overtopping the berm at last hi tide & running down west along the beach towards cliff along the sand behind the berm travelling down a previously formed depression. The beach rises & falls creating wide N-S depressions. High wave sets impacting on sandbar & going high up on beach = backwash & longshore drift.

Very large no. small fish in shallow water around estuary & in water at edge of roads. Peregrine falcon at entrance

Mouth Observation

Mouth state Open
Previous
Flow Present? Yes
Previous
Flow Direction In
Previous
Above Sea Above Estuary
Berm Height (m) 1.1m 0.1m
Berm Length (m) 0.0m

Physical Condition

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

Water Levels and Tides

Water Level Start Finish
Height (m) 1.57m 1.57m
Time (hh:mm) 09:14 12:35
Tidal influence No
Tidal Range Time Height
High 14:31 1.040
Low 08:20 0.270

Observation Documents

Link Date File name Description
08-04-2019 07:25 Gp1_20190324_1_212_030.JPG gp1_1
08-04-2019 07:25 Gp1_20190324_2_252_031.JPG gp1_2
08-04-2019 07:25 Gp1_20190324_3_292_032.JPG gp1_3
08-04-2019 07:25 Gp1_20190324_4_332_033.JPG gp1_4
08-04-2019 07:25 Gp1_20190324_5_372_034.JPG gp1_5
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