Nullaki (Wilson Inlet) Sandbar Opening 2023

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On Thursday 29 June 2023, Nullaki (Wilson Inlet) was opened. Wilson Inlet is located near the town of Denmark, on the south coast of Western Australia. The water level was approximately 1.27 mAHD at the time of opening. The channel was cut approximately 100 m from the western cliffs’ reference point.

By Friday 30 June, the outgoing flow had scoured the bar to a width of about 100 m. About 27 GL of water was discharged into the ocean in the first 24 hours after opening.

Imagery of the opening was captured by Department of Water and Environmental Regulation staff members, Cassie Paxman and Alex Burgoyne.

#DWERatWork #HealthyEstuariesWA #Estuaries #WAestuaries #WesternAustralia #DenmarkWA #OceanBeach #Inlet #sandbar #river #riverbreak #mouthopening

Department of Water and Environmental Regulation

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The drone footage was amazing! *I have the deepest respect for the power of water.* Thank you for the video.

linedanzer

Rough measurements show the Wilson Inlet at 19 square miles (12, 510 acres) . If the Water Level was 6 feet above mean high tide level that would amount to 75, 000 acre feet of water or 24.4 billion gallons of water draining out into the ocean. That would be an amazing thing to see in person. Great Video

OSDEstimates

I love these. I wonder what effect releasing all that tannin from the " tea " water does to coastal sea life.

alanmacification

Wondering if there's a reason why the angle has the lake water running into the coastline, vs angling out away from the coastline. I assume impact studies have determined this. But, just curious. Thanks.

wdilks

What is the purpose/reasoning for this? Benefits, impacts, etc?
Essentially, Why?
Is it necessary for what reason?
Thank you.

tempestgrav

I've seen many videos on You Tube showing the opening of this sand bar practically every year. What I wonder, is why the waste of time, effort, and energy to dig a channel 100 yards into the estuary? If you just dig out the sand bar from the estuary to the ocean, the flow will erode a natural channel. As it is, the outgoing flow basically ignores the channel that has been dug and erodes away the rest of the sand bar and the channels that were dug. Lot of extra effort put in that nature does for free.

Woody