Improving surf breaks through sand placement

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alakaboo
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Improving surf breaks through sand placement

Post by alakaboo » Fri Jul 08, 2011 10:42 am

Shire surfers, you could be getting some better banks soon...
"Surfing conditions will soon change at North Cronulla, after the green light was given to build an underwater sandbank, or ‘‘sea slug’’, to improve wave formation off the Prince Street seawall."

Full story here
Sand slug at Nth Cronulla

Will be fascinating to see if/how it works and how long it lasts.
Could be a landmark study influencing the design and placement of sand in nourishment and dredging projects around the country.

Any reports from regular surfers on the waves and impacts on crowding along the beach would be appreciated

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steve shearer
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Re: Improving surf breaks through sand placement

Post by steve shearer » Fri Jul 08, 2011 10:47 am

I saw a sea slug the other day.
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Re: Improving surf breaks through sand placement

Post by alakaboo » Fri Jul 08, 2011 10:49 am

Nudibranch, please Steve.
Their union will get upset.

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Re: Improving surf breaks through sand placement

Post by alakaboo » Fri Jul 08, 2011 10:51 am

While you're around, the EDO is running a free coastal law seminar at Lennox on the 16th.
PM me if you want the details.
Edit. It's not really a secret, and others may be interested.
http://australiancoastalsociety.org/fre ... ennox-head
Last edited by alakaboo on Fri Jul 08, 2011 10:55 am, edited 1 time in total.

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Re: Improving surf breaks through sand placement

Post by steve shearer » Fri Jul 08, 2011 10:54 am

Extremely under-rated animals if you ask me.

Love my sea-hares.

And the Spanish Dancer is a most beautiful creature.

The whirling red parapodia make a marvellous and poetic sight.
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Re: Improving surf breaks through sand placement

Post by alakaboo » Fri Jul 08, 2011 10:57 am

If you ever get the chance to dive at Bunaken Island off nth Sulawesi you'll probably lose your mind for good.

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Re: Improving surf breaks through sand placement

Post by marcus » Sat Jul 09, 2011 8:39 pm

i used to have quite a nudibranch collection in my aquarium
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Re: Improving surf breaks through sand placement

Post by alakaboo » Sat Jul 09, 2011 9:51 pm

that's an aquarium in bloody good nick. What happened?

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Re: Improving surf breaks through sand placement

Post by marcus » Sun Jul 10, 2011 12:26 pm

They laid their noodle like egg masses and then died soon after.
I was told by Bill Rudman from the sea slug forum ( http://www.seaslugforum.net/ )
that they would die soon after laying eggs, and he was right.
I also get baby sea slugs sometimes appearing in the tank.
I assume after i have fed my pet drummer some green weed from the rocks that the babies have hitch-hiked back to my tank.

Anyway back on topic, i think there are many long and boring beaches that could be improved for surfing by placing artificial reefs, such as 7 mile beach the shoalhaven, cronulla between the wall and the reefs, stockton and blacksmiths.

these beaches are usually featureless in surfing terms anyway

(edit: my aquarium has never been well looked after, more a haphazard occasional addition from the rock ledges, and top up of salt water now and then.
Its much better these days, however i have learnt not to add starfish, sea urchins and other slow moving creatures to the tank, as you don't know they are dead until you can smell it.)
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Re: Improving surf breaks through sand placement

Post by Kunji » Sun Jul 10, 2011 6:23 pm

They need to do something to that beach, it has the worst waves in sydney.
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Re: Improving surf breaks through sand placement

Post by alakaboo » Mon Jul 11, 2011 10:33 am

marcus wrote:I also get baby sea slugs sometimes appearing in the tank.
I assume after i have fed my pet drummer some green weed from the rocks that the babies have hitch-hiked back to my tank.
(edit: my aquarium has never been well looked after, more a haphazard occasional addition from the rock ledges, and top up of salt water now and then.
Its much better these days, however i have learnt not to add starfish, sea urchins and other slow moving creatures to the tank, as you don't know they are dead until you can smell it.)
You could also just be getting larval or juvenile nudibranchs in the water.

Don't add stinging anemones either. We had one that would detach and 'swim' around the tank at night, it ended up eating a lot of the really cool stuff, like a snowflake moray eel.

When I get a house with a concrete slab and don't travel so much I'll be putting in a big saltwater tank again.

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Re: Improving surf breaks through sand placement

Post by alakaboo » Mon Jul 11, 2011 10:34 am

[email protected] wrote:They need to do something to that beach, it has the worst waves in sydney.
Not on the "Best beaches in NSW" list for you, Coops?

They've also got a reliable source of sand from Port Hacking, so it could turn out to be a seasonal thing, I expect.

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Re: Improving surf breaks through sand placement

Post by Topher » Mon Jul 11, 2011 11:09 am

alakaboo wrote:
[email protected] wrote:They need to do something to that beach, it has the worst waves in sydney.
Not on the "Best beaches in NSW" list for you, Coops?

They've also got a reliable source of sand from Port Hacking, so it could turn out to be a seasonal thing, I expect.
The beach is rooted - the walls been generally crap for a while, anything above 4ft is a closeout.

Also you guys should see the long hole the sandminers are raping out right up towards boat harbour, When I look with good binoculars from one of the high buildings at north cronulla I reckon it looks below sea level and they are going 24/7. It's pretty close to the water. Thats where the sand will need to go. A really big swell combined with a big tide and I reckon that end of the beach is doomed.

Anyone got any idea what the miners are supposed to be doing up there?

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Re: Improving surf breaks through sand placement

Post by alakaboo » Mon Jul 11, 2011 11:35 am

Topher, they deliberately dig below the water table because it's much cheaper and easier to move it as a slurry a
That's what it looks like on the aerial photos, there's a couple of dredges floating in the ponds.
I heard that the price of building sand has gone up a lot recently, I assume they're making hay while the sun shines.

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Re: Improving surf breaks through sand placement

Post by No Pants Lance » Mon Jul 11, 2011 1:04 pm

[email protected] wrote:They need to do something to that beach, it has the worst waves in sydney.
nah. Surely Bondi holds that honour.

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Re: Improving surf breaks through sand placement

Post by batoes » Mon Jul 11, 2011 1:14 pm

I was a Nulla local once and remember the days when the alley used to pump. Most of the old boys will tell you that the sand mining and dredging has screwed the banks. Cronulla still has its days though, as all beachies do with the right swell, winds, tides etc - but it would be good to get the alley cranking again with a solid bank.
Topher - you are spot on - you can see all the way to the radio tower at bloody Bondi through the dunes now....Now if they could sort out the crowds, then it may make it even more appealing!
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Re: Improving surf breaks through sand placement

Post by mustkillmulloway » Tue Jul 12, 2011 8:06 pm

i still love greeno's idea......sew some hessen bags together....fill with sand...presto

bing.....a shorey peak :idea:
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Re: Improving surf breaks through sand placement

Post by marcus » Sat Jul 16, 2011 1:01 pm

alakaboo wrote:
marcus wrote:I also get baby sea slugs sometimes appearing in the tank.
I assume after i have fed my pet drummer some green weed from the rocks that the babies have hitch-hiked back to my tank.
(edit: my aquarium has never been well looked after, more a haphazard occasional addition from the rock ledges, and top up of salt water now and then.
Its much better these days, however i have learnt not to add starfish, sea urchins and other slow moving creatures to the tank, as you don't know they are dead until you can smell it.)
You could also just be getting larval or juvenile nudibranchs in the water.

Don't add stinging anemones either. We had one that would detach and 'swim' around the tank at night, it ended up eating a lot of the really cool stuff, like a snowflake moray eel.

When I get a house with a concrete slab and don't travel so much I'll be putting in a big saltwater tank again.
Hey Alakaboo, maybe you could put light on this for me.
NC once said on these forums that nudibranches eat bluebottles.
i just cant see how that would happen.
is he pulling our legropes?
Oscar Wilde - "I am not young enough to know everything"

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