r/Satisfyingasfuck • u/GinaWhite_tt • 2d ago
Visualization of how tetrapods dissipate ocean waves
[removed] — view removed post
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u/69hornedscorpio 2d ago
Visuals are the best way to educate
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u/Spitfire354 2d ago
That's what I said! But the principal wasn't happy about me taking LSD in school anyway
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u/TattvaVaada 1d ago
That's what I told my teacher in school about sex ed as well, asked for some practicals.
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u/Gutokoro 2d ago
Now try with mangroves and coral reefs, they will do it better
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u/VirtualNaut 2d ago
But can they survive the trash of man? );
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u/SleepyMarijuanaut92 2d ago
Nope. Ocean acidification is tight! /s
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u/static_func 2d ago edited 2d ago
You know, these high schoolers and future engineers probably aren’t the ones to blame for that
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u/cheesenotyours 2d ago
Aren't they limited to certain climates and regions? This video is in Japan.
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u/Gutokoro 2d ago
Yes, not all climate can have these, but Japan has one of the most beautiful mangroves park and one of the most beautiful coral reef in the world. It is in the southern islands, more tropical climate
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u/cheesenotyours 2d ago
I've been to Amami, and it def was beautiful. I wonder if Kyushu is south enough. These are probably used in the eastern and northern coasts.
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u/no_manches_guey 2d ago
Neat visualization! Dolosse have been around for a good while and help with coastal erosion
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u/ronnie_reagans_ghost 2d ago
Is there anything triangles can't do?
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u/hbgoddard 2d ago
Tetra means 4
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u/ronnie_reagans_ghost 2d ago
Indeed it does, but a tetrahedron, the shape that you'd (roughly) get if you filled in the empty space between the points of a tetrapod, has 4 triangular faces, hence why a tetrahedron is also called a triangular pyramid. It is a 3-dimensional arrangement of triangles.
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u/hbgoddard 2d ago
These tetrapods aren't triangular at all, though. Did you watch the video?
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u/jumzish94 2d ago
They said to fill in the empty spots between the points, though. Did you read their comment?
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u/randomNumBear 2d ago
A South African invention! Very cool
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u/Celastii 16h ago
well, the first tetrapod was a French invention in 1950 and after that different types were invented, which include the dolos. The dolos was invented in 1963 in South africa. these systems uses two layers and nowadays we can create an one layered system (for example the Xblocks)
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u/Valid-Nite 2d ago
Doesn’t the bin with the tetrapods have less room to build up force to make the wave though, or does it not matter?
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u/Independent_Tie_4984 2d ago
My thought too
Seems like they'd have to extend the bin the same length of the tetrapods.
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u/KanaHemmo 1d ago
Nope, there's the same amount of room in both bins. You can see those sort of pins on the sides which stop the "wavemaker"
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u/Responsible-Hold8587 1d ago
There are pegs on the side that stop it at the same place for both bins.
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u/Ruri_Miyasaka 2d ago
Wouldn't they be able to stop the waves even more effectively by restraining the person who is pushing the thingy?
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u/JoeyPsych 2d ago
Or you can just hire the Dutch, we are waterbenders
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u/digitalgoodtime 2d ago
Tetrapods are my favorite dinosaurs!
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u/Top-Idea-1786 1d ago
that means every single dinosaur is your favorite lmao
Every land vertebrate in fact
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u/gentlecuddler 2d ago
Is some of that difference not just through being able to push farther? Since the second example can go all the way, whereas the first example stops earlier.
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u/Peepeeweeweman 2d ago
I think the main issue is they are being pushed manually. So they could push faster or slower. Even if they stop at the same spot, if one is pushed faster it will have more force.
It’s a good cheap demonstration, but for more accurate results the wave creating mechanism needs to be more controlled.
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u/cheesenotyours 2d ago
There's a stopper on the sides of the containers that look like they're equal distance from the starting point.
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u/brother_of_menelaus 2d ago
They clearly still dampen it but I agree, the runway for the waves should be the same length to show the actual difference against similar force/volume.
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u/djayci 2d ago
Shame they look like shit. They’re all over, of course very useful but really ruin the coastline
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u/NaibStilgar7 1d ago
Hot take, I love the look of a tetrapod. The geometry is very appealing to the lizard brain
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u/Environmental-Law768 2d ago
This is a flawed demo. Wave maker does not have equal space to generate wave. The tub needs to be longer.
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u/DullExamination1957 2d ago
If you put a second wall where the tetrapods start you would have the same effect, no?
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u/Cambrian__Implosion 2d ago
I saw the words ‘water’ and ‘tetrapods’ and clicked it half expecting a model of not-quite-fish hauling themselves up on ancient Devonian shores or something. In retrospect, that makes no sense in this context, but my brain was on autopilot doomscrolling mode and only processing the bare minimum of what I was reading.
I’ll admit I was a little disappointed that this ended up not being the case. Not because this isn’t very cool (it definitely is), but because I love nerding out over paleontology and I didn’t get to do that. Kind of like when your mind is occupied elsewhere and you take a sip of a drink that you expected to be seltzer, but it’s actually juice. Juice is awesome, but my brain was expecting those crisp carbonation bubbles instead.
More on topic: This is the kind of demonstration that I absolutely loved to do with my students when I was a science teacher. Unfortunately, the time and resources required meant that we didn’t get to make many and they were often super simple, but I had some more complex ones that were made outside of class time and they were easily some of the most effective teaching tools I had. It’s 100x better when the kids make them themselves, but you gotta make the most of what you have resources for.
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u/PLANTEandGrow 2d ago
I love seeing this, I was raised in Rota, Spain and these tetrapods bring back memories!
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u/wolverineczech 2d ago
It almost works like a gun suppressor, gradually dissipating the energy, instead of delivering it all at once.
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u/Educational-War-5107 2d ago
I have seen those on Google Maps. I did not know what they were for until I saw this video :P
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u/Significant-Royal-37 2d ago
is there anything special about the shape or could a similar effect be achieved with literally anything else in the way
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u/Pragmatic_decision 2d ago
From Wikipedia ("Dolos"): They work by dissipating, rather than blocking, the energy of waves. Their design deflects most wave action energy to the side, making them more difficult to dislodge than objects of a similar weight presenting a flat surface.
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u/Accomplished1992 2d ago
This is how stealth technology works to reduce radar signatures of military aircraft
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u/franslebin 2d ago
I thought tetrapods would be some sort of cool sea life, but they're just those breakwater things. What a disappointment
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u/poundmyassbro 1d ago
I'm not saying these don't work, but this representation was shitty. Obviously, the one with more room to make a wave will make a bigger wave. They pushed the water a couple inches in the first tub, but double the amount of water being pushed in the 2nd tub.
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u/CurrentDay969 1d ago
They have these up in Duluth Superior area to break Lake Superior Waves. They works super well and many people climb all over. Fascinating to see the stark differences
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u/MiSsiLeR81 1d ago
But the first tub has less water in it? So the lesser the chance of it reach over the wall?
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u/Capable_Fox_00 1d ago
I would want to see other objects ability to block the waves, to see if it is due to the tetrapods themselves or just from having a large object blocking the wall
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u/serpentechnoir 1d ago
Sand is billions of years of dead animals that cushion the erosion of the coast
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u/Zealousideal_Yak7815 1d ago
Ummm...maybe one tiny mistake is that the piston should move the same distance as the other one? Otherwise the momentum is reduced?
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u/_felagund 2d ago
I have a secret fear of falling between those tetrapods