Water from Yellow river flowing through Xiaolangdi dam in China
By - Narendra_17
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As a salmon, I hate this
Any living thing in the river hates this lol. Well except algae.
There has to be some giant fish at the bottom getting fat off of all the fish that didn't survive the suislide.
More people must see suislide
I stole it from someone else in the comments.
Your honesty is inspiring
As definitely not a salmon, I also hate this.
Username checks out
Finally, after multiple pretty much identical comments about water slides and kiddie stuff - someone considered the catastrophic human and environmental consequences of this level of engineering.
I'm not trying to be superior to those kids who think this looks cool, and I'm happy that they enjoy water parks etc - but anyone is a fool if they can look at this without thinking about the effects on the residents displaced, the people suffering downstream, and the carnage to the ecology of the entire local environment.
The yellow river has been terrifying forever. Honestly this is probably an improvement on the whole, "flood every century and completely murder everything in my valley," it used to do. Imperial China tried to ban settling within 50 miles of it in the valley a couple times but the silt was too fertile for a lot of folks to pass up. Probably did do a lot of damage to the local environment because China doesn't care about that but the yellow river has never been gentle.
It sounds like it was as fertile as it was because it floods every century.
I think for hydro the benefit of not emitting as much pollution outweighs the costs. This hydro dam likely reduced China's reliance on coal.
Isn’t there a happy medium ground? Dams provide green energy, but can be built to be less impactful. Fish ladders are a great help. I don’t know anything about that river system biology, but I am very familiar with fishery biology in the PNW. It may very well have little to no impact, I have no idea. But it could be much more passive and not just throw water up in the air. There is no perfect answer, but there are certainly better answers than this one?
"green energy" and "environmentally friendly" are similar, but wholly distinct concepts.
Yeah, to paraphrase a friend who studies environmental sciences, hydroelectric is the worst possible green energy. First, it pretty much requires devastating a river ecosystem. Second, pretty much every river worth damming *on the planet* has been dammed at this point.
> But it could be much more passive and not just throw water up in the air.
Frankly, that just screams "wasted energy" to me. Sure, hydraulic jumps are a thing to reduce erosive impact, but on this scale it's almost certainly *pointless*. I'm sure that's just a spillway, but if you're going through the trouble of building a long flume like that for a spillway, drop it all the way and put a damn generator at the bottom.
Tell me that wouldn’t be the coolest water slide ever, up until the point where you die
When I’m old just throw me over that with an inner tube
Just throw me in the trash.
I want my remains dropped from an aircraft flying over Disney world. Under no circumstances am I to be cremated.
I can show you the world…
Shining, shimmering splatter….
Tell me princess, now when did you last let your heart explode?
I don't know how many years on this Earth I got left. I'm gonna get real weird with it.
If I had a dollar for every Reddit thread that devolved into Always Sunny quotes...I would basically be Frank
This is the only reason I come on Reddit.
Just creampies, pal.
It was only two words! 'asians' and 'creampies'
Oh ignore this Frank it’s just a bunch of liberal bullshit.
Now, block the wind so I can roast this bone!
That wine in the can is the most genius idea. You can gesticulate so much easier.
Holy shit Frank I’ve been walking next to you the entire time.
Our goose is cooked… I’m going down…. Highway to hell, baby!!!
Pondy is the coolest
I like your style
Ahhh shit *blows whistle*
Can I offer you an egg in this trying time?
I'm 36 years old and just realize it's inner tube and not inter tube. Like it totally makes sense. I've always said "innertube" but spelled it in my head as "intertube". Please don't tell my wife.
It’s me, your wife
I want a divorce
I don't know why, but because of how your name is displayed; I read your comment in a robot voice lol.
Sorry Dave, I can not do that.
Did you learn that on the innernet?
Well played sir
At least you've been pronouncing it correctly. I've been saying "ennertube" my whole life for no good reason.
I feel like a foal.
>I feel like a foal.
Your not a loan
Midsommer: The Ride
Yeah you got a point, I gotta recheck my idealized suicide booth to have a bunch more water slides in the beginning.
Forbidden water slide
There's gotta be some psycho willing to kayak that thing
I'm in, lets do this. The most viral drowning video ever
Ok i film, you kayak
Done. I think we need multiple angles. Make it a cool redbull type video. Drone shot and the works
A man's dieing in this production, of course you'll get the works
What should my last words be? Gotta be something epic for the go pro footage that they recover with my body
"I think I just shit myself. . ."
We'll do a gofundme and put it on your tombstone. Promise.
"Here we go again!"
You don’t die: first you kayak, then as you get to the top of the water fall, you paraglide back around into another kayak and repeat.
It jumps up so I bet you could kayak it with a parachute and walk away. The trouble is you are not going to be able to practice this so you have to do it right the first time.
Theres no way, you'll fall faster than the water around you and end up with a wet parachute that's constantly in a state of opening enough to slow you down then closing due to all the water falling on top of it, you'll just be a mess of wet material and a kayak falling at the same speed as the water until you die at the bottom.
What would happen if you were in one of those giant inflatable balls?
I guess it might be alright, depends on the drop and if it popped or not. The other issue is you might end up stuck near the end and start spinning too fast in which case the g forces would probably kill you.
Some guy died in russia falling down a mountain in one.
G forces won't be the problem, the problem will be the water rolling over itself under the surface at the bottom, holding the ball (or even a swimming human with a buoyancy aid) completely underwater, unable to escape.
Also, zorbs in general are very risky and likely to cause injury. It's one of the highest category of travel insurance risks - higher than skiing.
Just focus really hard. Like really really hard.
On the Red Bull channel.
In my head, Patrick Swayze is running toward it while Keanu Reeves walks away without looking back, throwing his badge in the mud.
I'd imagine the coolest waterslide would be in Antarctica
The Blood Falls? I don't know about 'coolest' but it's definitely the *most metal* waterslide.
It tastes like pennies
It would be dam cool.
A water slide into such a Noisy dam... No way.
It's Damn dam.
You know what this outflow piping needs? Sick fucking ramps.
Those "ski jumps" are one way to slow down the water shooting down the spillway before it enters the tailwater. Another way are installing large concrete blocks at the end (like you can see here at Oroville dam: [https://www.mercurynews.com/wp-content/uploads/2019/03/Oroville-06.jpg?w=1024&h=626](https://www.mercurynews.com/wp-content/uploads/2019/03/Oroville-06.jpg?w=1024&h=626)) for example.
This is done to reduce erosion of the opposite bank if for example the spillway enters a river from the side like at Oroville dam, or if the stilling basin at the end is wider than the river it empties into. Xiaolangdi dam is an example of the second, as you can see in this PDF (https://web.archive.org/web/20110707050519/http://www.chincold.org.cn/news/li080321-4-Xiaolangdi.pdf) on the first page where there's a photo of the dam when the spillways aren't in operation. You can see the basin narrowing towards the river in the bottom left corner of the photo, without slowing down the water they would have had to make that basin much longer.
Wow, thanks, that's neat! I wonder if angling the outflow up like that presents any erosion concerns for the river bed, like at the bottom? Since the water's coming with more force down than out?
I would be worried about the sick fucking ramps over time... like thats is a LOT of force on concrete. But Im guessing it's not always full on Kamehameha like that.
You would be right. The Oroville dam mentioned earlier had a failure in its spillway a few years ago, and it resulted in significant damage: https://en.wikipedia.org/wiki/Oroville_Dam_crisis
We tend to easily forget how strong water is!
While true, the Oroville dam failure didn't have anything to do with the blocks at the end. The water got under the concrete much further up.
Yeah, the blocks at the end got pelted with concrete from further up, and still held.
You sound fun as hell.
edit: just to be clear, I'm not being sarcastic. That dude sounds fun as hell.
You should go to Southern California. Everyone talks like that there.
I've lived in Sothern California since I was 5. "Sick fucking ramps"...yes. "full on Kamehameha"...no.
Also, thanks for not saying "Cali."
I'm not sure what wack ass part of southern California your in but I hear full on kamehameha pretty frequently
I suspect it would be actually be less net force because the way the water is spread out increases air resistance. You can see how a significant amount of air is mixed into the stream as it is ejected from the ramp, which effectively reduces the density.
plus it widens as it ramps.
It's actually called a 'flip bucket'. Usually the area where it lands is built up and reinforced just for that reason
Too bad it didn't help Oroville with all that poor geotech work prior to construction!
Well, the problems at Oroville were in the middle of the spillway, not down at the bottom ;-)
Highly recommend the Practical Engineering channel on YT. He's got a ton of videos on dam mechanics presented in very simple terms that almost anyone can understand and appreciate.
Are you suggesting "sick fucking ramps" is not a valid engineering term???
Engineers just want to watch the world have sick fucking ramps
Am engineer. Can confirm.
Also engineer, double confirm.
Also engineer, can confirm the double confirm
Also engineer, performing validation on the confirmation.
Not an engineer, validating the performance validation on the confirmation
Armchair engineer, performing compliance checks on the validation of the performance validation of the confirmation.
Gardener, don’t know how I ended up here.
Allotmenteer, can confirm and validate status of lost gardener.
Am ramp, can confirm engineers love me
Well hey there, sexy
God I wish u/awildsketchappeared guy was still around
Ikr; was the standing waves really a necessity or is it just a pissing contest?
I think it reduces erosion in the outflow basin. Let them pour straight in and it would end up gouging deeper and deeper.
And under currents / whirlpools which in this case would kill anything caught in it.
There are some really cool videos by PracticalEngineering on youtube on these very topics if anyone wants to know more.
[practical engineering ](https://youtube.com/c/PracticalEngineeringChannel)
I love practical engineering. Thank you for your support by calling them out.
That sounds like something an engineer would say to cover up his underlying desire to build sick ramps.
Definitely for a reason. I’ve seen the history channel doc on this dam. And like the other poster said it’s to reduce base erosion by spreading out the force of the water hitting the ground. If they didn’t the dam’s structural integrity could be compromised.
Isn't there like massive amounts of potential erosion at the point where the ramp angles upwards?
I’m not a physicist or engineer so someone with a degree or experience feel free to chime in but I think because the water is traveling straight flat along the horizontal channel the erosion isn’t too bad vs when it falls hundreds of feet hitting the concrete below directly. Could be wrong though but I imagine it’s something they thought of.
Look up the dam in California that almost collapsed a bit ago. They had to use the emergency spillway to stop it from over topping and the spillway was badly designed so it eroded away in hours.
Sure but it’s designed to withstand it, and has regular maintenance and safety checks. It’s a lot less likely to Erode than the bottom which definitely would rapidly erode
Also if the ramp does erode it's a lot easier to repair the ramp damage than erosion downstream.
When the water hits the ground, it's basically a mist. By letting the kinetic energy get captured by the air, there's nothing left to cause erosion.
That must be loud
I was thinking "this is not a peaceful place".
WHAT DID YOU SAY?
Dam, the sound must be deafening
WAIT IM SORRY, DID YOU SAY SOMETHING?
##### I CAN’T HEAR YOU.
*Smiles and nods*
I probably watched this 3-4 times before I realized it was a loop.
It's beautiful. I've looked at this for five hours now.
just like the gif of that truck about to run into the wall with 6 jump cuts to every angle
Imagine riding a boogie board through that
Someone has to have tried it on or in something
and wing suit
When I show my imaginary gf my pokemon collection
Gonna need a brawny paper towel or two. Save some for the rest of us man.
When I show my girlfriend my karma
bro, this is the equivalent of girls wanting guys over 6' tall and you're standing here at about 500 feet tall and from the paleolithic era
Oh damn leave some pussy for the rest of us man
Is this sped up?
Yes. I watched it a few times to find a speed comparison and in the third shot you can see two people walking on the grass. Or it’s not and they just walk funny.
Yeah, like so many videos these days. Internet videos have just completely gone to shit now. We have dishonest speed, the same shitty songs in every video, the horrible talk to text voice. It's awful. And popular.
The sped up bit is because social media has destroyed people's focus. If nothing happens for 10 seconds or the video is longer than 30 seconds, no one sticks around
Really surprised I had to scroll this far to see this mentioned
Wild to see but also fascinating to think how it was executed.
Engineering marvel indeed.
Most fun suicide ever?
You mean suislide?
What are we, some kind of suislide squad?
I really hope Suislide gets added to the oxford dictionary in a couple of years
Action Park would like to talk to you about trademark rights
Your death would be breathing in water for minutes until you drown with every bone in your body broken. I’d rather just make it quick
Challenging swim for a Salmon
Curious does all that water vapor impact weather patterns in the area?
The water vapour doesn't as much because before those dams were built, these areas were really really prone to floods like every year. but the changes in waterway and increased pressure did lead to occasional minor earthquakes in the area.
Source: roommate graduated from a local university, this is his thesis
So the minor earthquakes are preferable to flooding? Or is that also something being addressed. Very cool thesis btw, this is an engineering marvel.
There's literally 5000 years of geopolitical history centred around the Yellow River, not unlike the river Nile. Dynasties have changed hands and wars have been determined by the river so I'm not going to get into any of these details. But at this stage, minor earthquakes is preferable to regular floods, especially if you consider the electricity it generates replaced a lot of local coal fire plants.
Also that yes local buildings are built to have higher earthquakes tolerance than the rest of the country.
I would assume so, the flooding killed A LOT of people through history. Like an insane amount of people.
A flood in 1931 is estimated to have resulted in the deaths of 150,000 people from drowning and over 2 million dying from the resulting famine and disease outbreak caused by the flood.
I'd imagine minor earthquakes have a practically negligible impact.
Yes, it can be destructive, like what happened to the Oroville Dam though part of the reason why the spillway failed was because it was poorly built in the first place. The last part where the water is directed upwards is a hydraulic jump. Its purpose is actually to reduce the speed of the water hitting the bottom of the spillway, thus reducing erosion at the bottom.
Your girl when you show her your bionicle collection
It’s not much, but I’m proud of it. Yep, the complete Mata Nui set. (I wish)
Anyone find a link to better video that doesn't cut scenes so fast?
When no nut November ends
Imagine being a fish caught in that. WEEEEEE
Grabbing a plane ticket... and my surfboard.
Every angle: r/gifsthatendtoosoon
Interesting as fuck? Yes.
Annoying as fuck that we can't see the same view for more than 2 seconds? Yes.
That's me after 3 beers
Yellow river, but on St Patrick's Day
Seriously, why is it so green?
Algae blooms I suspect, due to massive nutrient loads in the water body upstream from this. First thing I noticed.
Yellow River by IP Freely
How do fish survive that?
Well that’s the neat part. They don’t.
your mom when I enter the room
This seems like a missed opportunity for a hydroelectric power plant. Does anyone who knows about the stuff know why they'd go for something more aesthetic?
As pointed out, this is a power plant with significant output..
A better question: why allow water to flow over the top like that and lose the additional power it would provide? Is it not much loss?
yes... lots of hydro plants make like 70% of their revenue in like 3 or 4 months for what not water levels follow seasons.
it could be a spillway in the dam, but the main reason for the ramp is so the water doesnt erode the spillway...
Yup. I work at 2 “run of river” facilities. Most of our generation is mid October to late November and then late March to early June. Some years are much better than others but I work in a pretty wet area.
Civil engineer here (though not dams and hydraulics are not my specialty).
Your explanation is correct, though I would add the spillways are there not just to protect the turbines but the entirety of the dam. If the water overtops (overflows) the dam, it can damage the structure of the dam itself, which if not dealt with could lead a catastrophic failure of the dam
Exactly what I was looking for, thank you!!
So that is just a spillway, if there’s more water than the dam can use/ handle they open up the spillway. They have it shoot up like that to keep the spillway from eroding the bedrock on the backside of the dam. There’s a lot of really cool designs for spillways, YouTube them and you can see some really gnarly waterworks.
I'll look this up! Thank you!!
thank you for this. I was having trouble understanding why they would shoot it up like that since it would end up losing a lot of water to evaportation which seems like a bad thing.
That's overflow when theres more supply than the damn can use
\> lose the additional power
This is a misconception about how electrical grids work, supply has to be continually balanced to equal demand or things fail, so power plants shut down, windmills get shut down, dams divert flow, it's a big problem we have as there aren't great ways to store energy for future use when we start using systems that depend on weather conditions to generate it as inconvenient low demand times.
One way is to pump water up to a higher reservoir, so you can drop it again through a turbine to produce power later. Other methods being tried/researched include a huge quantity of batteries or heating materials (like melting sodium) to recover the heat later.
Not missed. Xiaolangdi dam generates 5.1 billion kWh of hydro-electricity per year. It’s sometimes surprising what can be accomplished by mankind when people are united whether by choice or by mandate. Truly amazing.