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GMC Gellibrand River Estuary Mouth Observation Site

25 March 2019

Observation details

Overview

Estuary Gellibrand River Estuary
Site Gellibrand River Estuary Mouth Observation Site
Observation ID #12830
Date and Time Monday 25th March 2019 10:05am
Approved Approved

Notes

AHD G6  1.56  @  09:37     1.59    @   16:10

Mouth perched, flow both in & out. High seas & WSW swell (8-15 secs.) = waves over 6m. impacting beach sending waves all along up to the dunes & completely across the entrance  & down the channel. Hi tide about 15:00 combined with strong longshore drift sent waves into the estuary - green water was visible at start of channel from estuary. Incoming waves were going over top of water returning across a wide front. A whirlpool occurred at start of estuary. Near gale force winds from many directions around estuary, channel & beach

Increasing water cover at edge of roads,& on flats DS G4. Small area of water starting to cross OOR at flood markers. Fishing platform structure completely under water by 15:55

Mouth Observation

Mouth state Perched
Previous
Flow Present? No
Previous
Flow Direction N/A
Previous
Above Sea Above Estuary
Berm Height (m)
Berm Length (m)

Physical Condition

Current Mode
Wind Direction North
Beaufort Scale High wind, moderate gale, near gale
Sea State High

Water Levels and Tides

Water Level Start Finish
Height (m) 1.58m 1.60m
Time (hh:mm) 10:05 15:55
Tidal influence Yes
Tidal Range Time Height
High 15:05 1.090
Low 08:44 0.180

Observation Documents

Link Date File name Description
07-04-2019 15:25 Gp1_wave_along_beach_entering_channel__copy_2.jpg
07-04-2019 15:25 Gp1_20190325_storm_surge_down_channel_.jpg
07-04-2019 15:25 Ge_20190325_waves_amp_outflow_both_over_wide_area_033_copy.jpg
07-04-2019 15:25 Ge_20190325_wave_entering_estuary_088.JPG
07-04-2019 15:25 Ge_20190325_water_crossing_OOR_2_092.JPG
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