[gregmcal]

I've noticed that the beaches between the Central Coast and Port Stephens (north of Sydney) have become quite badly eroded over winter. When I first noticed this happening I thought it might have been a seasonal thing, however, there doesn't seem to be any sign of recovery.

Is this erosion seasonal?
Why does it occur?
Where does the sand go?
Will it recover naturally?
If so what is the mechanism that causes the sand to build back up?

Thanks

Brad

[voksveta]

Good questions, but we have skeptics here so 'u may need prove that they do not come from a homework assignment, or justify why other contributors should help provide answers to a homework assignment.

[moopogyOvenny]

Any reason why only the beaches between the Central Coast and Port Stephens (north of Sydney)?

[bunkalapa]

This was discussed on ABC radio (Victoria) last night, I think I heard it. It would have been in the mid evening, or maybe it was on Tuesday early evening. I was only half listening, but I think they mentioned about a 20 or 30 year cycle and some suggestion that this cycle may be changing. I can't really remember more than that.

[KojlinMakolvin]

Any reason why only the beaches between the Central Coast and Port Stephens (north of Sydney)?

It's not just up there, big seas down here this year wiped heaps of beaches out.

[moopogyOvenny]

This was discussed on ABC radio (Victoria) last night, I think I heard it. It would have been in the mid evening, or maybe it was on Tuesday early evening. I was only half listening, but I think they mentioned about a 20 or 30 year cycle and some suggestion that this cycle may be changing. I can't really remember more than that.

There is a cycle and yes if the cycle we know of keeps going then we may have reason to be worried.


I clearly remember the buildings on the north shore of Sydney being undercut and in threat of falling into the sea not a lot more than 40 years ago.

Yes and it is not just the north shore.

[bunkalapa]

This is not what I was thinking of, but it might be somewhere to start researching from:

http://www.abc.net.au/radionational/...-sands/3640702

[KojlinMakolvin]

This is not what I was thinking of, but it might be somewhere to start researching from:

http://www.abc.net.au/radionational/...-sands/3640702

Another good link

http://www.coastalwatch.com/news/art...in%20Australia

[KojlinMakolvin]

South of Sydney back in June

http://www.illawarramercury.com.au/n...g/2582760.aspx

[gregmcal]

Not an assignment, I walk my dogs on the beach most days and have been watching the sand disappear for about a year. Stockton beach (where i like ti go camping) has been closed to 4wd's for about 6 months. I ask about that area because that is the area I know and all beaches I have looked at are effected it probably extends much further than then.

I'll check out the links and see if the session is podcast.

Thanks.

Brad

[bunkalapa]

Warning.....enormous, learned pdf.....but it might well have the information you are looking for in there somewhere:

http://www.adelaide.edu.au/press/tit...stal-eBook.pdf