From the last set of minutes from the Wamberal Seawall advisory Taskforce Nov 18 2021. A bit like asking journos writing about climate change to include references scientific papers talking about how CO2 is a greenhouse gas. Any system that affects the coast from a different angle upsets the balance of that orientation and the system then takes considerably more time to re-adjust. A new wavepool development for the Sunshine Coast points to the future of pools in Australia. the council up here is anti sea walls, but there is a thread that runs through them very much of "stuff the beachfront guys - they are rich". Compare their prediction of how it would look with the reality shown above.. https://www.eventbrite.com.au/e/climate-change-and-coastal-erosion-the-g GOR coastal erosion webinar link for today at 3pm for those interested. Protesters linking arms on the beach in 2002. 1. This process must require wind over thousands of years but people and waves stomping over dunes seems like any dune system near a popular town once destroyed wont come back? You'd think that would then open it up for more legal action (aka why did ABC get first dibs and XYZ missed out?). The exception of course is if youre a donor to the LNP then a $3M block of land can be sold for $30M!!! I am looking at it but there is probably someone better qualified out there. Men sand-bag properties on Collaroy Beach Arlington Building and a run of houses to the north circa 1922. 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. gsco, I'd have thought that the first hurdle for any enhancement - besides the environmental impacts - would be the issue of access and whether the investment creates something with the most benefit for the most people. https://static01.nyt.com/images/2017/01/28/world/28israel6/28israel6-sup Sea-change hostage negotiations at Hellhole of the Pacific Between these three, you can protect any shore from water erosion. Thanks heaps for the update Craig. 47 votes, 47 comments. The Surfrider Foundation Australia organised a protest against the seawall that is being erected between Narrabeen and Collaroy. They can be excused as they thought theyd be informed before any such works took place, as per the 2016 Coastal Management Act. Anyone who has been to Chiba in Kanto will have seen the Tetrapod formed surf breaks there. The coastline in SW Vic has evolved to respond to a dominant SW swell and storm pattern - that's why the beaches face the way they do. If he is an expert and this is what he designed, then I shudder to even imagine what the non-expert coastal engineers would design. All they are protecting are some pretty sparse land and some rice fields a couple of hundred metres inland. Here's also the appendices and figures etc: https://files.northernbeaches.nsw.gov.au/sites/default/files/collaroy-na Yeah, cheers I've been through them as well. Yep. That's appalling if it's the case, BB. lilas Manly Hydraulics did the work which was used for the initial design but I am not so sure about their input on what was finally constructed. "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." [happy to stand corrected on any of this] Be interesting to know whether the assumptions for the modelling included any information on the value of the beach to be lost, belly. However, the work then continued skyward with a seven metre vertical concrete wall on top of the foundations. EDIT: Just to be clear, the issue of erosion has nothing to do with sea level rise, climate change, or buying the latest board. 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. They are frequently used in locations where further shore erosion will result in excessive damage, e.g. But there will also be a range of other social and environmental grants on offer that the LGA will use to leverage off for on-going maintenance. San Sebastian surfers are fighting a wavepool in their hometown, which is also the hometown of Wavegarden's founder. With expected sea level rises obviosly making those matters worse - however there is some irony in the fact Gina Reinheart whose carbon footprint is horrendous, just bought the most exposed land in sunshine beach to these very issues - but im also stressed people like her etc will want to build sea walls down the track. Joint Venture adopts new name, Te Puna Aonui. The engineers would have likely argued against this for the reasons given above (and then some). Granted the Reality series and Aero are ludicrously expensive at the $2,000 barrier, but they're promising to push a more immersive, satisfying VR experience that delivers on incredible fidelity. Hey guys I need to write an informative paper based on remedial measures used to protect infrastructure against erosion. Of the people that Swellnet spoke to, the opinions of how we got to this point swung from nefarious (It was rushed through during COVID because they knew people were occupied) to inept (It was signed off by a mid-level planner with no knowledge of coastal processes). "I really like living here deep in the bush, close to nature. July 28, 2021 - 7:04AM. It's corrupt to the eyeballs and the only winners are the crooked pollies and the dodgy construction companies while the once beautiful Japanese coastline is lost forever. I get informed about a proposed bike lane two suburbs away, questions an aghast Donohoe, but I hear nothing about construction abutting a nearby public beach?, Gordon was equally puzzled: I guess people become frustrated with the bureaucratic process and find ways of not involving the public. Operates out of the same premises. @Tango Photograph: Lewis Isaacs/The Guardian Beachfront residents back. Great stuff. They needed see this, but still probably wouldnt t have believed it. "We have the Tools and imagination" If so, I presume it may slow around the reef, but then continue north on a more normal migration speed. @Craig - Seem us humans have been doing dumb shit for quite a while now. We all have valuable opinions, but they need to be separated from facts at all times, especially when it comes to Journalism. The obvious one is disaster relief which will be a given in the medium to long term for the repair of the wall and its impacts to adjacent beaches. How about dredging narrabeen lagoon?? exports the same quantity of energy in green electricity and hydrogen as it exports in thermal coal and liquefied natural gas. Locate courts, tribunals and offices. A number of properties along the oceanfront from Narrabeen to Collaroy were seriously endangered by erosion during a large storm swell in 2016. That ABC article is spot on when it comes to waterfront properties. Its no wonder the climate brigade aren't on board telling us all there garbage but erosion been around a tad longer than the 80s. Though still in its early days, the reef - which cost $18 million - has maintained beach width since it was completed in 2019. If they approached the landowners then the most they would be offered is market value. The houses up the dune with no apparent erosion would be an apple compared to these lemons (for now). One thing about mankind. Nature fights back. I go to look at the big mistake after a big easterly storm. In a story on Northern Beaches Review, Bob Orth, who lives in one of the houses behind the seawall, said the seawall should inspire others to do likewise. Offshore reefs would be expensive , but we are already spending 100's of millions on bad solutions that actually cause more problems than they solve so money cannot be used as an excuse. The Act was introduced by Rob Stokes, the NSW Minister for Planning and member for Pittwater. Seawalls form a defining line between sea and land. Anybody heard of rising ocean levels & retreat by wealthy landholders who where allowed to build in the dune systems which nature designed to replenish the beaches? A sneaky second application, for the vertical wall was seen by very few. Shit.That looks like they are preparing for an invasion. They have destroyed every built form on the beaches. There's only a loss to be made for the purchases. This is associated with above-average wave heights related to Tropical Cyclone Seth and also elevated ocean water levels associated with very high tides, Mr Horton said. That this kind of construction was approved with the obvious impacts on the public domain (the beach) simply beggars belief, and the real focus should be on the process to consider the design options and then issue the approval. Point being that the experiment is a gimmick as it would be quite easily modelled in a software program given all geometric surfaces and the regular wave pattern. The properties were bought in good faith, said one local who wished to remain anonymous, and the owners must feel an obligation for the authorities to protect them, but a seawall is last century thinking.. Instead, sand nourishment is the popular solution to maintaining beach width, though both Donohoe and Gordon are feeling once bitten and skeptical of any council promises. PW road and any associated public infrastructure was used as a eligibility factor for public funding to protect the private properties. While celebrating his record for coastal protection with a park on the Collaroy-Narrabeen stretch, Northern Beaches council was also processing a Development Application thatd threaten the very same beach. The council will buy me out at any price if things get too hot". Yep need to see front on pic Hopefully there's someone with deep pockets able to go after the truth of the matter. There have been high profile storms on the NSW East Coast since the mid-70s. Instead they provide a caveat for bulldozing sand from low on the beach to higher on the beach in times of heightened storm activity - which only lowers the beachs natural defence system. Though not failsafe in extreme events, isnt it amazing how reefs and well-place gabions somehow protect small atolls in middle of the ocean for most of the time? The group aims to raise awareness of the impact that the building sector can have while pointing out that more drastic measures need to be taken, as most countries do not include full building. Surfers, sun bathers and swimmers. The contractor is required to remove this temporary working platform and bund at the completion of the works, sieve the sand and remove all debris, and return the beach to its former state.. Take the houses away eventually they would be building a wall to protect that road that you whinging moles drive around on for 20min checking it. It is possible that this is part of the Silverback's Seachange pork barrel rollout. Im worried they will put one of these in at a beachie around here as the carpark and rd are imminent to be taken by the ocean and Im sure that will dramatically change the profile of that beach. The owners of those properties must have the most amazing collection of dirt on the political class. Caveat emptor..buyer beware. There's been significant coastal erosion (acute) along the GOR in recent years, though only a handful of places have experienced coastal recession (chronic). This widely publicized protest was an attempt to promote a pro-democracy, civil liberty, social justice message, and to protest against corporate greed and economic inequality. I think they would be very happy with an ugly seawall. I watched a 4 corners or foreign correspondent thing last year on the Japan sea walls. They're not effective at all mate. https://www.9news.com.au/national/weather-nsw-sydney-collaroy-surfer-pul Sydney 'Living' Seawalls Given that it seems to fly in the face of best practice, has anyone asked what the NSW Coastal Council has to say about it? Both Donohoe and Gorden were correct, up to a point: The construction began with concrete piles sunk six metres below sea level, protected by a rock toe. Google "End-wall effect erosion" and you'll find many papers/studies on this. 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. Looking at that DA via Stu's link, it must have taken a considerable, possibly illegal, effort to keep that out of the hands of those community members with a long record of interest in the matter. My understanding is that the hard seawall was constructed with the specific intention to protect the private property behind the wall. BB has there been any attempt to take the process to the Land and Environment Court? the Senior Environmental Officer" Northern Beaches NSW govt!! As I understand it, governments have been reluctant to purchase vulnerable properties because there will be so many of them and the public purse could never afford it. I recently moved house [Northern-Rivers nsw] and seal-level rise was a very serious consideration of mine. I've written about it before but the real reason here is money- it is massive pork-barreling on an unprecedented scale. the above-average wave heights and elevated water levels are to blame. Bullshit. the whole sea level/erosion issue is here now ..hmm any idea's solutions you have come across? As hostile native rescue party moves in for the killOh the Humanityreads Humilityreads Kook! Or boarding a jumbo jet to go for a surf and buy the latest board all things responsible for the needing of the wall in the first place. The second DA is now here. When deciding to spend rate payer dollars, on what metric do they use without using the big IF ? So they all get their own private beach access. Your browser has JavaScript disabled. The Collaroy wall is not subtle. " 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.] We have summarised some key facts about the first of the Collaroy owners' seawalls. My working assumption is that they have behaved unethically on this matter. Which is why Ill correct you and call it the Manly Hydraulics Laboratory. info a new build now paid by the public purse. Could be some good entertainment next time some serious swell hits. During periods of low swell energy, sand accumulates on the beach, widening the profile and forming a natural barrier for when storms and large waves erode the coastline. Man, that'd get old real quick, happy to pass. >>How can you say there is no evidence unless you have the facts to prove it? The majority of these companies are legitimate businesses set up by Yakuza. Lake that has been going on for the last 20 years. oh yeah and someone call security. I've looked at the general location plan of the cables and it seems there is a good say 500m- 1000m distance between groups of them along the beach, and they are buried for the first 500m out from the shore, so I would say there is a good chance of working within those areas in consultation with the cable authorities. Like I said at the start, IF he is an "expert coastal engineer" then we are in a much deeper hole than I imagined. That's the only thing stopping all the sand at the base of the wall getting washed away. Probably not council's fault then, happy to blame the owners! It is a difficult and wicked problem. Are the exposed quarried rocks part of the construction/ foundation or are they from pre existing efforts. More than a year after severe storms damaged property in Collaroy, construction of a long-awaited sea wall is underway. South Narrabeen beach is now useless to anyone. 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