Coastal erosion

9 years ago
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touch107fm
touch107fm
WA
78 posts
WA, 78 posts
26 Nov 2016 6:50am
Hi all

Have a question regarding coastal erosion.
I am a blow in and have only been here in Perth say 5 years, my local beach were I usually do a sneaky session from is literately half the size that it was last session.
Now I know some beaches lose allot of sand during the winter months and appear during the summer months. But keen to understand why hasn't my local beach returned to the awesome beach site it was last year????

cauncy
cauncy
WA
8407 posts
WA, 8407 posts
26 Nov 2016 9:01am
Councils have extended set backs
Up at drummonds cove a large among of beach houses are being demolished ( imho a bit premature, here in Dongara we've had lots of issues around surf beach, this has mainly imo been through crap infrastructure planning, trapping swell and alas causing erosion
DJMWA
DJMWA
WA
345 posts
WA, 345 posts
26 Nov 2016 9:30am
cauncy said...
Councils have extended set backs
Up at drummonds cove a large among of beach houses are being demolished ( imho a bit premature, here in Dongara we've had lots of issues around surf beach, this has mainly imo been through crap infrastructure planning, trapping swell and alas causing erosion



The houses in drummonds are (mainly) being demolished due to the fact that they were built on leased land (not freehold). A deal was struck with the home owners and council years ago regarding the leases not being extended. The owners were given the opportunity to purchase new blocks of land at a (small) discounted rate on the condition that the houses were demolished by the homeowners by the end of this year. Not to be a know it all but the substantial erosion events happened quite a few years after this deal was struck.

DJMWA
DJMWA
WA
345 posts
WA, 345 posts
26 Nov 2016 9:54am
touch107fm said...
Hi all

Have a question regarding coastal erosion.
I am a blow in and have only been here in Perth say 5 years, my local beach were I usually do a sneaky session from is literately half the size that it was last session.
Now I know some beaches lose allot of sand during the winter months and appear during the summer months. But keen to understand why hasn't my local beach returned to the awesome beach site it was last year????




As for your beach, it could be a combination of factors for the lack of sand atm. For example, the south side of Yanchep lagoon (Fishermans hollow) get washed out through winter to form a shallow lagoon between the dunes edge and outer reef and completely fills with sand in the summer to form one long beach (to the reefs edge.). We had a reasonable winter this year with a few Late Spring storms which washed the sand out that had started to build,so it is taking a little longer for the SSW wind to fill the lagoon in with sand. Trigg point gets a huge rip in summer with the seabreeze which drags all the sand from the beach (which gets blown up by the wind also) out over all the reef ledges/platforms which is why you get the extended beach and bank in summer.
THE PIN PULLER
THE PIN PULLER
WA
472 posts
WA, 472 posts
26 Nov 2016 12:17pm
When Lancelin gets that spit how good is the flat water behind it yeowwwwww
cauncy
cauncy
WA
8407 posts
WA, 8407 posts
26 Nov 2016 9:29pm
DJMWA said...
cauncy said...
Councils have extended set backs
Up at drummonds cove a large among of beach houses are being demolished ( imho a bit premature, here in Dongara we've had lots of issues around surf beach, this has mainly imo been through crap infrastructure planning, trapping swell and alas causing erosion



The houses in drummonds are (mainly) being demolished due to the fact that they were built on leased land (not freehold). A deal was struck with the home owners and council years ago regarding the leases not being extended. The owners were given the opportunity to purchase new blocks of land at a (small) discounted rate on the condition that the houses were demolished by the homeowners by the end of this year. Not to be a know it all but the substantial erosion events happened quite a few years after this deal was struck.




I'd hardly call it a deal
I'd say they've been f......d over
Land at discounted rate, a fair few I know couldn't afford anything than the shacks they lived in
Then with the money they made on the land division to the tunes of millions was all lost on the markets,
Why would you remove a load of rent payers contributing to the shires coffers to return it to natural vegetation
The shire was having back room meetings and f......g people over that'd lived and brought up their kids in an iconic west Australian spot
Any other country would strive to keep history ,
Australia has f all history because we keep levelling it
DJMWA
DJMWA
WA
345 posts
WA, 345 posts
26 Nov 2016 11:09pm
cauncy said...
DJMWA said...
cauncy said...
Councils have extended set backs
Up at drummonds cove a large among of beach houses are being demolished ( imho a bit premature, here in Dongara we've had lots of issues around surf beach, this has mainly imo been through crap infrastructure planning, trapping swell and alas causing erosion



The houses in drummonds are (mainly) being demolished due to the fact that they were built on leased land (not freehold). A deal was struck with the home owners and council years ago regarding the leases not being extended. The owners were given the opportunity to purchase new blocks of land at a (small) discounted rate on the condition that the houses were demolished by the homeowners by the end of this year. Not to be a know it all but the substantial erosion events happened quite a few years after this deal was struck.




I'd hardly call it a deal
I'd say they've been f......d over
Land at discounted rate, a fair few I know couldn't afford anything than the shacks they lived in
Then with the money they made on the land division to the tunes of millions was all lost on the markets,
Why would you remove a load of rent payers contributing to the shires coffers to return it to natural vegetation
The shire was having back room meetings and f......g people over that'd lived and brought up their kids in an iconic west Australian spot
Any other country would strive to keep history ,
Australia has f all history because we keep levelling it


Well I was one of the kids that grew up in those houses mate so you can get off your soapbox now. Unfortunately it was LEASEHOLD land and as far as I'm aware everyone took the deal (not that it's anyone's business whether they could afford it or not) which means your argument about ratepayers is also moot. I'm no fan of the council mind you, I just wanted to clarify that the houses were not getting demolished due to the erosion, although this winter only left 2m of lawn between our front wall and beach so another decent winter and you'd probably find that my mums lounge room would be more of a salt water jacuzzi.
RayQ
RayQ
WA
638 posts
WA, 638 posts
28 Nov 2016 9:08am
Lots of beaches along our West Coast are loosing sand. Lano, the grassed area is in retreat for as long as I can remember, used to be able to park 3 rows of cars on that stretch. Yanchep, that southern Lagoon area only started to wash out some years back, now takes.longer each year to fill in again. Pinaroo used to be wider, do a down winder from Lano to Wedge and see the massive dunes being eaten into. There are some maps the insurance companies work with ( possible future payouts ) which show which areas they expect to loose around Perth
DJMWA
DJMWA
WA
345 posts
WA, 345 posts
28 Nov 2016 1:47pm
I did read an article regarding the south to north sand flow for the southern half of WA somewhere which was pretty interesting. They did elude to the fact that is was very difficult to say how much was just a natural movement and how much was being impacted by all the Marina's and break walls. Geraldton in general has a lot to answer for the port position/break walls/dredging imo. The big dredge they did in the port 20(ish) years ago buried a reef ledge (that used to have an amazing A-frame off it) just south of drummonds that never broke again. Also interesting that not long after they put that mini breakwater that runs parallel with chapman rd that drummonds started to get crazy erosion (could be drawing a long bow here but it is an interesting co-incidence). I can definitely say that I have never seen so much sand on the beach at glennies in the winter time and yet just around the corner the bloody road and tamarisk trees are getting claimed by the ocean.
As for Fishermans hollow in yanchep I couldn't really say as I've only lived there for 6 years and it has had a pretty similar pattern (give or take a month or two) for that time.
cauncy
cauncy
WA
8407 posts
WA, 8407 posts
28 Nov 2016 7:24pm
DJMWA said...
cauncy said...
DJMWA said...
cauncy said...
Councils have extended set backs
Up at drummonds cove a large among of beach houses are being demolished ( imho a bit premature, here in Dongara we've had lots of issues around surf beach, this has mainly imo been through crap infrastructure planning, trapping swell and alas causing erosion



The houses in drummonds are (mainly) being demolished due to the fact that they were built on leased land (not freehold). A deal was struck with the home owners and council years ago regarding the leases not being extended. The owners were given the opportunity to purchase new blocks of land at a (small) discounted rate on the condition that the houses were demolished by the homeowners by the end of this year. Not to be a know it all but the substantial erosion events happened quite a few years after this deal was struck.




I'd hardly call it a deal
I'd say they've been f......d over
Land at discounted rate, a fair few I know couldn't afford anything than the shacks they lived in
Then with the money they made on the land division to the tunes of millions was all lost on the markets,
Why would you remove a load of rent payers contributing to the shires coffers to return it to natural vegetation
The shire was having back room meetings and f......g people over that'd lived and brought up their kids in an iconic west Australian spot
Any other country would strive to keep history ,
Australia has f all history because we keep levelling it


Well I was one of the kids that grew up in those houses mate so you can get off your soapbox now. Unfortunately it was LEASEHOLD land and as far as I'm aware everyone took the deal (not that it's anyone's business whether they could afford it or not) which means your argument about ratepayers is also moot. I'm no fan of the council mind you, I just wanted to clarify that the houses were not getting demolished due to the erosion, although this winter only left 2m of lawn between our front wall and beach so another decent winter and you'd probably find that my mums lounge room would be more of a salt water jacuzzi.


Not saying I'm correct but after your response I checked with s couple of unfortunate ones who have been forced to move
The shire was citing erosion as s major factor in their decision
Also I find it bizarre that private dwelling arnt protected in a way that businesses are
The big 4 caravan park at dongara has seen major works done to protect it
A similar project could of been done at Drummond's
I find it hard that your so accepting ,especially if it was where you spent your childhood
I've lived in 7 different countries and there's not many spots around like those at Drummond's
In any other country they'd be pulling out the stops to save it
Why should I give s f**k anyhow , I just do
mazdon
mazdon
1199 posts
1199 posts
29 Nov 2016 11:15pm
touch107fm said...
Hi all

Have a question regarding coastal erosion.
I am a blow in and have only been here in Perth say 5 years, my local beach were I usually do a sneaky session from is literately half the size that it was last session.
Now I know some beaches lose allot of sand during the winter months and appear during the summer months. But keen to understand why hasn't my local beach returned to the awesome beach site it was last year????




Which beach are you referring to touchy?
PM if preferred


DJMWA
DJMWA
WA
345 posts
WA, 345 posts
12 Dec 2016 9:22am
earthengine.google.com/timelapse/
Elroy Jetson
Elroy Jetson
WA
706 posts
WA, 706 posts
12 Dec 2016 10:47am
Great link! Cheers for posting.

Just checked out Hillarys Boat Harbour.

The beach to the south is gaining sand over time while Pinnaroo point to the north is becoming narrower.
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