The 18-year-old scored a near-perfect 9.50 in the Final, held at Seaside Reef in Encinitas, California. The sheer number of cables there suggests to me that an offshore reef proposal would be unsuccesful. That is why this option was selected for Palm Beach Qld, and I think should be considered for all the other coastal erosion hotspots along the NSW coast as well. Adjacent a second wall constructed just to the north, the half finished revetment was torn to rubble with dangerous rebar, boulders and cement being washed into the surf zone. For those who object to it, there is something hostile about Collaroy's multi-million-dollar sea wall. Well now we know who is responsible for this debacle. Sorry Peter but we can't just take you on your word for it. Or are they just doing it like politicians and getting consultants to advise them and simply ignoring it and doing what they want as they are not bound by law to take that advice. The seven metres protruding above sea level is vertical, even going beyond vertical for the final metre to prevent wave overtopping. For some it. The track became a road. Anyone who has been to Chiba in Kanto will have seen the Tetrapod formed surf breaks there. Building up during periods of low swell energy, while being transported into the surf zoneduring periods of high swell energy, acting as a buffer to the incoming surf. And as I said in my first comment that is because of the road. Wherever there's a seawall the sand/beach washes away and makes it virtually impossible to enter or exit the water, not to mention the impact on the birdlife, fish and crustaceans that depend on the seasonal sand flow that comes with a healthy beach. They needed see this, but still probably wouldnt t have believed it. Section 2.4 Item 4 - classic stuff. The role of the council in all this might come out if people push hard enough. The erosion at Collaroy/Narrabeen Beach is not particularly significant, unusual or surprising. I've written about it before but the real reason here is money- it is massive pork-barreling on an unprecedented scale. And it was created many years ago when coastal property was much lower in value and the bang for buck was much higher. Should this critical lens be applied to other topics such as the Coolum wavepool? It has to be worth a look. More to come once the other residents agree to pay their contribution. This would reduce the lateral movement of sand along this stretch of beach, reducing the natural erosion while creating some great banks. She had reigned as Queen for 70 years. That's assuming the properties are still worth something to the market. It's an interesting point whether you just blame the owners for buying a house in such a risky area and hoping taxpayers will bail them out, versus the fact that the council must have approved people building houses there in the first place (although possibly a very long time ago), "Professor Short said the council bought properties along the beachfront and turned them into parklands in the 1970s and attempted to put a moratorium on redevelopment in the 1980s, but lost its case in court.". Theyre only a couple of hundred years away from When a hard structure is introduced to the equation we see an increase in reflective energy andturbulence, slowing the accretion of sandwhile also acceleratingerosion in storm conditions. Step 3: Calculate the number of pilings that will be required. Its brutalist engineering, says Gordon frankly. A seven-metre high wall erected to protect beachside mansions from being washed away has sparked debate among locals in a wealthy Sydney suburb. We all know there is significant increases in sea level rise..are we setting a precedent that if your coastal property succumbs to coastal erosion, you should be financially compensated? First it was a track. https://files.northernbeaches.nsw.gov.au/sites/default/files/collaroy-na https://nationalprecast.com.au/wp-content/uploads/2015/06/Collaroy-Beach https://www.9news.com.au/national/weather-nsw-sydney-collaroy-surfer-pul https://lighthouse.mq.edu.au/article/september-2021/Living-Seawalls-in-g https://www.odt.co.nz/news/dunedin/tarzans-stormy-st-clair-skinny-dip. Engineered to Australian Standards. It didn't last long and within 12 hours the sand that was built up against the near finished first wall was 2/3rds washed away. Sure if youve bought the last 5 years ignorance cant be an excuse, but theres nothing wrong with wanting to live on the beach. More than likely entombed in one of those tetrapod molds you mentioned above. It would be fantastic to see an interview with someone from Many Hydrolics as they did all the Scientific modeling and have been very open in sharing their data. Not even the dude came up with half an ear! Cyclonic activity isnt forecast to increase at all - I think the jury actually out on that at the moment, east coast of Australia in a 500 year dip too on cyclonic activity. In 2002, protestors form a "line in the sand" from Collaroy to Narrabeen opposing seawalls (Photo: Surfrider). The recently constructed Collaroy seawall yesterday failed - or passed - its first real test, depending on which side of it you stand. This clearly did not happen at Collaroy. If the council are desperate to get a liability off their books then they have totally screwed it. Will try and find out. Japan may be a perfect case study. Joint Venture adopts new name, Te Puna Aonui. The very thing we live for one the beaches is full of concrete and man made fuck ups. The reason is the appearance of a concrete seawall along a stretch of beach between Wetherill Street and Stuart Street, which both run off busy Pittwater Road. I am thinking that sad as it may be, we will never be able to turn back the clock and have a natural passive coastline of Sandhills and trees. Nobody there is in a position to offer 2-3 times market value. A horizontal reef is also a "Hard Structure" yet it acts in a very different way to a Vertical Sea Wall such as the Collaroy one. I wrote to Many Hydraulics Laboratory to ask for the details regarding the sea wall assessment they produced. These are the taxpayer funded grants that LGAs will apply for, to repair the wall. I definitely disagree with a buy back. The only feasible way forward without wasting any more council and tax payers money to protect the properties in question is to acquire the properties at any cost and return them to a naturalised stated. The software built for Kelly's wave pool was also a big leap forward to modeling actual breaking waves and I really hope they share that knowledge with the rest of the scientific community to help forward our understanding. I liken it to a form of gambling. If you look at the photo of the wall there appears to be a set of stairs built into the concrete for each property. development, carparks & roads behind the hind dunes leading to biketracks, walkways, supporting the community including There have been high profile storms on the NSW East Coast since the mid-70s. I imagine the ocean will eventually claw away under and around and over the structure. And please take a look at all the other ridicules things Coastal engineers are doing around this country so you can see the pattern of incompetence I am referring to. I also presume the view of the houses will be enhanced by the no trespassing signs in large red writing. I am safely 140m above sea-level now so that should be safefor a while hahaha. @dawnperiscope 2)How much did the Collaroy Carpark Coastal Protection works cost? Death of Her Majesty Queen Elizabeth II. I like the cut of your pedantic job, there Lilas. Shop unique custom made Canvas Prints, Framed Prints, Posters, Tapestries, and more. My working assumption is that they have behaved unethically on this matter. From the last set of minutes from the Wamberal Seawall advisory Taskforce Nov 18 2021. If the houses go, the road goes shortly after. On top of this they have places sand band grounds out perpendicular to the sandunes. Maybe start a thread in the Forumsand you must have a few Wild sea tales to tell with 560 Lord Howe trips under your belt. However the short period easterly swells go straight into all parts of the surfcoast digging it up and turn almost every beach with low swell energy into an ugly mess. Amongst other things, it is illegal to "establish, maintain or use a spoil ground or other ocean disposal point (including dumping materials at sea)". As good as a house on the beach would be imagine how much more beautiful the East Coast would be with a 1km + building buffer from the coast depending on the terrain. Thanks BB. Installing the Pilings is the fourth step. I do however feel there needs to be more separation regarding fact and opinion in your article. From their perspective building the wall before further erosion took place and moved closer to the road was another advantage as was disregarding the impact on the beach for a potentially more permanent solution. Five years ago, residents along Collaroy Beach watched helplessly as enormous waves smashed into their backyards, collapsing pools and patios of their multimillion-dollar waterfront properties. They have access to and use a large suit of software modeling tools, but unfortinately a lot of them don't have outputs that non-scientists can get their head around [just numbers which are meaningless on the surface unless you understand what they represent.] To add a bit of controversy, I've often wondered: Is Carties borderline just a novelty wave? They might be looking for a new 'environmental' consultant after the next major swell. The council will be the lone 'interest'. Whether the NSW state government / local council want to backflip with a pike on their current failing seawall master plan is another thing. Any chance of a dedicated ErosionCam, Swellnet? Insurance companies know this. Thats tens of thousands of homes). Was it some random guy off the street? What sort of idiots approved this shit? the Senior Environmental Officer" Northern Beaches NSW govt!! They've had a very very blessed life compared to anyone else in this country and that in return they would do such harm to a public place to save their private property is a bit sad. I first noticed them when I went to Nijjima island in the early 90's and asked what were they reply was to protect the land from erosion.they actually had the moulds for the TP's there and just kept making them when needed.. Seems from my research, we have actually made a lot of progress towards physics-based numerical modeling of near-shore/beach environments in the last 20 years or so. (As we all know, unfortunately, money/wealth/property seems to be many people's priority, and corrupt opportunists step in to "help" with that). Wetsuits may never be the same again. Spot on. OK this is the real one. This forms a foredune and a backdude. I guess that the levees will give me a 100% guarantee that it'll never happen in my lifetime". In the Doc below, They advised to do more Numerical modeling [Physics simulations] to be sure of the walls effect. "When a hard structure is introduced to the equation we see an increase in reflective energy and turbulence, slowing the accretion of sand while also accelerating erosion in storm conditions." https://www.9news.com.au/national/weather-nsw-sydney-collaroy-surfer-pul Sydney 'Living' Seawalls There is currently an online petition to stop it extending to the Marquees. The politicians and land owners actions are an entirely separate discussion and I'm not entering into that minefield! Rather than a natural ebb and flow of wave energy, a hard structure increases reflective energy and turbulence, making it difficult for sand to settle and accrete. It certainly doesn't make it the best decision though. That ABC article is spot on when it comes to waterfront properties. Hence, they are of no market value to me. As a result, if the sea erodes the shoreline (and the tidal level moves inland) it encroaches upon land once part of someone's private land title. Has any one ever suggested an off shore reef, seems like a win-win or is the sea floor unsuitable? That means that the Feds have all the money, the States some and the councils bugger all. Premium ad-free surfcams, dawn surf reports, and more https://www.sydneycoastalcouncils.com.au/sites/default/files/JRCorkill_A https://www.surfline.com/surf-news/theyve-kerbed-guttered-narrabeen-beac https://www.scs.nsw.gov.au/soil-conservation-services-projects/collaroy- https://files.northernbeaches.nsw.gov.au/sites/default/files/documents/g https://files.northernbeaches.nsw.gov.au/sites/default/files/collaroy-na https://www.northernbeaches.nsw.gov.au/council/news/whats-happening-coll https://www.linkedin.com/mwlite/in/peter-horton-coastal-engineer, https://www.facebook.com/watch/?v=144437777895204. The Northern Beaches took a massive hit by big surf and a king tide . Get access to long-range forecasts, hourly graphs and ad-free webcams. For me, the value of these properties is in the negatives and at the very least, its a big fat round calamari. Unfortunately, what we see in Collaroy might become a norm to protect this lifestyle. @yeti. Great stuff. A sneaky second application, for the vertical wall was seen by very few. The lessons, it would seem, are still being learnt. Needs to be more separation regarding fact and opinion in your article or passed - its first real,. 2-3 times market value to me that an offshore reef proposal would be unsuccesful surf breaks...., depending on which side of it you stand have behaved unethically on matter! Pedantic job, there is currently an online petition to stop it extending the! Custom made Canvas Prints, Posters, Tapestries, and more your article their books then have... 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