tbh just listening I thought they delayed the rescue too long.
They should've scrambled on the first high tide before the weather turned foul.
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tbh just listening I thought they delayed the rescue too long.
That is correct.
Are you perfectly sure about that?carvin marvin wrote: ↑Sun Jun 18, 2017 6:09 pm.
A swell that has travelled over a sand slug gets transformed into a tapered swell.
No shit, granules of sand are highly mobile.steve shearer wrote: ↑Tue Jun 20, 2017 9:59 amthats the thing with sand. It's highly mobile.
the amount of sand that has been shifted here in the last week and a bit has been incredible.
Trev wrote:I have always had a lot of time for Dick
smnmntll wrote:Got one in the mouth once, that was pretty memorable
Umm fcuk isn't that what happens at pretty much every training wall in NSW? Sand slug is pushed out by the rivermouth's re-direction ... swells come across that slug and are broken up into peaks and wedges ... happy days.steve shearer wrote: ↑Tue Jun 20, 2017 8:46 amAre you perfectly sure about that?carvin marvin wrote: ↑Sun Jun 18, 2017 6:09 pm.
A swell that has travelled over a sand slug gets transformed into a tapered swell.
Could you explain how?
The effect is right but the mechanism isn't.steve shearer wrote: ↑Tue Jun 20, 2017 8:46 amAre you perfectly sure about that?carvin marvin wrote: ↑Sun Jun 18, 2017 6:09 pm.
A swell that has travelled over a sand slug gets transformed into a tapered swell.
Could you explain how?
They didn't do any proper monitoring of the Cronulla slug, and it was an order of magnitude too small to persist.steve shearer wrote: ↑Tue Jun 20, 2017 2:12 pmthats the mechanism Boo, I guess what I'm asking is how effective these sand slugs are at activating it?
How effective, for instance, was the Cronulla sand slug?
There's lot of data now from the Gold Coast where sand replenishment has a long history. Everything I've seen points to sand outlets on the beach ala South Straddy and D-bah (ocassionally) producing the best surf with sand placed beyond the surf zone being ineffective at best and decreasing surf quality at worst.
There's a lot more going on at most rivermouth breakwall spots than just refraction on river bars, including phase enhancement leading to amplitude increase, wedginess from rebounding waves and increased deep water refraction on longer period swells due to canyons carved in the shelf and slope from ice age river flows. Pretty complex wave zone, that almost always leads to good surf.
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