Overtopping failure of a large-scale artificial dam in Taiwan (Feng and Chen, 2012)

Overtopping failure of a large-scale artificial dam in Taiwan (Feng and Chen, 2012) - Part 2 Surge

Рет қаралды 657,140

11 жыл бұрын

The height of the man-made test dam is 4 meters. The dam was built in the Huisun experimental forest of National Chung Hsing University (NCHU), Taiwan. The water overflowed the dam at 8 min 25 sec (08:25) of this video. The video was recorded by Prof. Zheng-yi Feng of NCHU on April 10, 2012 around 9:30 am. Prof. Su-chin Chen of NCHU established the dam for a group research on landslide dam failure mechanism supported by Taiwan National Science Council. The copyright of the video file is owned by Prof. Zheng-yi Feng and Prof. Su-chin Chen of NCHU, Taiwan.
Observation of this dam failure:
1. Due to the shooting angle from the downstream and steep sloping of the creek bed, we cannot see the water rising during impounding at the upstream side.
2. The inflow from an upstream canal was about 1~2 CMS.
3. Water is seeping out from the bottom of the dam since 00:10.
4. The seepage water gradually increases with increasing water level.
5. At 08:25, start of overflow.
6. A small "alluvial fan" was formed till 10:35 by the eroded dam materials.
7. The dam breached at about 10:45 and the surge wave front traveled downstream.
8. There is a peak flooding discharge/stage can be observed.
9. The dam was eroded horizontally and lowered gradually.
10. The flash flood due to the breach lasted about 1 min 15 sec.
11. and others.
By Prof. Zheng-yi Feng on May 12, 2012, e-mail: tonyfeng@nchu.edu.tw

Пікірлер: 218

@robertharrison4967 5 жыл бұрын

That dam was designed to fail for the camera, it was never meant to hold back water.

@thomaspyefinch7394 5 жыл бұрын

good job

@AirCrash1 4 жыл бұрын

This comment was designed to fail for KZfaq, it was never meant to read the description.

@denmann364 4 жыл бұрын

I see that their engineers are as good as our North American ones

@garywheeler7039 4 жыл бұрын

It is not a "large scale artificial dam". It is a large scale model of a dam.

@andrewgraves3529 3 жыл бұрын

It says that in the description

@paulablair395 4 жыл бұрын

I had trouble seeing the height of the water overflowing the dam - - - glad it was a test dam.

@cageordie 5 жыл бұрын

With so much flowing under I'm a bit surprised any made it over. Good demonstration of the failure though. Oroville had a go at doing that on a major scale.

@mimismom17 4 жыл бұрын

Yes but Oroville did it on purpose to let the water gradually flow instead of one big rush to prevent damage down the line. There’s a documentary on here I just watched last night.

@kjbuchanan63 3 жыл бұрын

True.

@stevenwilson879 2 жыл бұрын

Back in the day, before the housing developments, we had drainage ditches and cow pastures. I loved building little dams to see if I could (obviously temporarily) divert the water. I promise that no salmon were harmed in the process.

@grabitz 3 жыл бұрын

I don't know why I enjoy dams breaking. It's like watching a fire you can't take your eyes off.

@locouk 9 жыл бұрын

The Perspective is all screwed up on this, they could have picked a better angle to film from.

@tippyc2 6 жыл бұрын

From an engineering perspective, all thew interesting stuff usually happens on the downstream face of the dam.

@mastermasonjoewillis3904 5 жыл бұрын

I thought the same thing!

@bigwheelsturning 5 жыл бұрын

@@mastermasonjoewillis3904 I kept waiting for the water level "upstream" to rise too.

@spikespa5208 5 жыл бұрын

Tilted to the left, guess their camera bubble was busted.

@sigisoltau6073 4 жыл бұрын

From this angle the dam looks empty.

@jeanbarque9918 3 жыл бұрын

I dont understand how the water overflows when its much lower in the background (i did read the description still dont understand how, just searching for explanation).

@nydted1 3 жыл бұрын

From what I can tell the angle of the camera makes it appear as though that is a smaller slope than it actually is. I wondered the same thing and started to look much closer at the background. The bridge in the background does not look quite right so I suspect the angle of the video is misleading a little bit.

@rogerdudra178 5 жыл бұрын

A very good learning tool.

@blackwaterhousecork5182 5 жыл бұрын

Awesome Camera Angle as it captures all of the Key Features of the Failure and Collapse

@greenmanofkent Жыл бұрын

I wonder if those people on the opposite bank were aware of the quite severe danger they were in, due to the rapid erosion. Why didn't the others on this (camera) side try to warn them?

@kjbuchanan63 3 жыл бұрын

That was fascinating to watch how it failed.

@willgaukler8979 3 жыл бұрын

...exciting...yet interesting veido ...thank you...

@patriciaguenzler9150 3 жыл бұрын

Thanks for the video

@koreanature Жыл бұрын

My best friend, You Great Good... !!! I wish you every day of your development. Best Relaxing +thumb up3!

@inyobill 8 жыл бұрын

It's amazing what the trolls find to post their comments about. Apparently folks don't read descriptions when they don't understand. I did.

@daneclark3161 6 жыл бұрын

Read? You expect people to read???

@spikespa5208 5 жыл бұрын

@@daneclark3161 Expect? Not any more, actually. But we can always hope.

@User0000000000000004 3 жыл бұрын

Your mom read the description.

@judgetk8327 5 жыл бұрын

I don't think that the dam was meant to hold back anything. There was a steady supply of water coming down so do you think a pile of gravel is going to hold the water back any longer than enough time to build up for just what you have seen?

@MrTonyfeng88 4 жыл бұрын

Dear friends: We did many dam breach tests in the past years since May 12, 2012. Recently, we have published a SCI original paper in Landslides journal with two time-lapse movies for the dam breach and slope erosion test performed on November 1, 2018. The paper is: Zheng-Yi Feng, Hao-Yang Huang and Su-Chin Chen* (2020) "Analysis of the Characteristics of Seismic and Acoustic Signals Produced by a Dam Failure and Slope Erosion Test" , Landslides, published online on March 19, 2020. It can be accessed at rdcu.be/b3kv6 or doi.org/10.1007/s10346-020-01390-x or contact me. Best wishes, −− Zheng-yi (Tony) Feng, Ph.D., P.E. Professor Department of Soil and Water Conservation National Chung Hsing University 145, Xingda RD Taichung, 402 Taiwan web.nchu.edu.tw/pweb/users/feng/ e-mail: tonyfeng@nchu.edu.tw

@hotroddaddy-et4xg 3 жыл бұрын

here's 15,000 years of experience of being allowed to exist.. YOU WILL NEVER CONTROL GRANDMOTHER EARTH!! your study of water and nature consists of a few hundred years experience...our elders can teach you more than all your teachers and science combined..your soil and water conservation is a joke.. you people can't live in the bush of the land for a month..you've just put a new spin on how to destroy what ensures our existence ..

@erithacustexas3907 6 жыл бұрын

Nice!

@bradleychristensen9866 4 жыл бұрын

"Chen! Get the shovel!"

@veltamartisone1329 3 жыл бұрын

......super video......👍💓👍💓👍 👍💓👍💓👍thank you............

@MrTonyfeng88 9 жыл бұрын

It can not be fake. It is just because the video was shooting from downstream toward upstream. The slope of the stream bed is steep and can not see the water while it was impounding. We do many tests and have taped many other videos.

@barryfoster8535 8 жыл бұрын

+Tony Feng It *IS* fake - i.e. photoshopped. The water behind the dam never rises even close to the top. There is a clear line where the water appears out of nowhere. And, if the stream is as steep as you claim, why are the people standing on the adjacent road not standing at an angle? They are standing almost 90 degrees to the road and the road is perpendicular to the stream. Thumbed down for being fake.

@timhansen4556 8 жыл бұрын

+Barry Foster I believe that the failure of the earthen dam in this engineering experiment is similar to the failure of your powers of observation and analysis: first there are some leaks through the "grey matter", and then it is simply overwhelmed.Read up on earthen dam failures- this is exactly how they happen, and how they look.

@RangieNZ 8 жыл бұрын

+Barry Foster If you look up a valley from below, the people will appear upright. As the camera is to one side (not directly below them) the people have a slight lean (which they do).

@KiritoZero2 8 жыл бұрын

I agree this ist no fake you can See the Watermark when the dam collapse

@hiscifi2986 5 жыл бұрын

Look Guys, The Prof did not have a 30 foot Camera Tripod.

@markpearson8210 5 жыл бұрын

The height of the water coming over is lower to what you see in the background where the bridge is at so how does it overflow, water cannot flow upwards

@woowooNeedsFaith 5 жыл бұрын

Learn to read video descriptions.

@markpearson8210 5 жыл бұрын

@@woowooNeedsFaith ooh pardon me for breathing don't get cocky

@woowooNeedsFaith 5 жыл бұрын

@Mark Pearson who's talking

@scottstewart9584 4 жыл бұрын

Tens of gallons of water falling on the unsuspecting daffodils at the bottom of this very non-steep hill was traumatic. Oh my heck!

@TheFarmanimalfriend 8 жыл бұрын

Why spillways exist.

@FiferSkipper 3 жыл бұрын

Human: spends hours building a dam River: spends 4 minutes going back to normal

@utej.k.bemsel3199 7 жыл бұрын

we are testing artificial dams too, but only at a very little scale and for fun! every time we eat mashed potatoes with sauce the members of our whole family builds on each dish a potato-dam and fills it with sauce. then the eating begins, wich dams lasts the longest is the winner! ;)

@fishpest2039 4 жыл бұрын

WELL GOLLLY, we does that SAme thin here, But we youse the Reel stufff, GRAVOX, now some like it theck, an some like it hot, but me l like mine theck an hot an lotsa of it, they best bits are the choco sprinkles in the mash, so we alla looking for youres and ours at the same time..

@1BillT 5 жыл бұрын

No spillway? Let’s stand closer and get the rest of our town to join us.

@Tindometari 3 жыл бұрын

Belly laugh at all the people who don't realize this was an engineering research experiment studying the dynamics of dam failure. Which, by the way, is a very hot topic in Taiwan.

@formulah113 3 жыл бұрын

there is no way this dam overtops. 8:25 i stand corrected.

@vijeeshtvarghese7357 5 жыл бұрын

How can it overflow if there is no water behind it at that level. Plus the sound of water flowing is clear water while in video it is muddy

@woowooNeedsFaith 5 жыл бұрын

Perspective.

@SteveF1967 3 жыл бұрын

“The sound of water flowing is clear water...”. whatever....

@Tindometari 3 жыл бұрын

The camera is slightly below the water level (poor camera placement, if you ask me, but then they were interested in capturing phenomena at the top and face of the dam). The whole setting is on more of a slope than it appears at first -- note how the people are leaning.

@xpoint70 8 жыл бұрын

I believe it's real. I've done a bit of nature photography and pictures/video never look as steep as reality whey you shoot up slope like that. I feel the camera is well below the level of the lake. The way the people are walking looks like they are on a slope. The view of bridge, car(?) and what I assume is the road off to the right all seem consistent with viewing from a low angle. I will say, at first viewing something seemed very wrong...'where does the water come from?' I thought. It made sense when I placed myself below the dam looking up slope.

@genogeno1234 5 жыл бұрын

Great video. Thanks for posting

@TheDodgeboi 9 жыл бұрын

This couldn't be a structure intended for permanent water retention. It must be a "failure experiment".

@J.Cameron.Stuart.Adams. 6 жыл бұрын

TheDodgeboi Yes. It was a scaled study for dam failure done by University class.

@chuanist 7 жыл бұрын

The embankment next to the people eroded so much that it posed a potential danger of collapsing and throwing them into the water.

@lurchie 5 жыл бұрын

Things get interesting at 8:23.

@mattcook7881 3 жыл бұрын

They got some kinda special anti-grav water over there in Taiwan?

@hornetobiker 6 жыл бұрын

starts at 8.30

@gabos7892 4 жыл бұрын

water is relentless

@CrossStario 2 жыл бұрын

Am I the only one thinking that the water looks lower behind the dam right before it over tops?

@snorman1911 8 жыл бұрын

people saying this is fake have no idea what they are watching.

@welshpete12 6 жыл бұрын

yes , it is always a surprise how stupid some people are !

@lovemenot82 3 жыл бұрын

Halloween 2020 comming up and it looks like it was the bugs in silent hill coming out of the dam ⏬👍

@wifighostcruiser9665 3 жыл бұрын

I'm not sure about your title, I think a dam, by definition, is artificial. Unless you're comparing it to one of those natural dams that grow across rivers???

@hiang-wahpeh8388 5 жыл бұрын

Need to mention "test" in the summary/heading. I think the students/professor need to think harder BEFORE even carrying out this test. I am not even half an engineering student but I thought it would not work just by looking at the "material" used to construct the dam and that at this chosen test site LOL the dam is already seeping water at the start of the video.

@jarvisfamily3837 Жыл бұрын

Undermining of this rockpile started as soon as water reached it.

@paulcarter2907 5 жыл бұрын

Starts at 8.20

@hardpunch8483 8 жыл бұрын

08:25 start of overflow.. ur welcome

@constructioneerful 6 жыл бұрын

hard punch don’t worry about the criticism..it was still funny.

@weltonvillegal6258 6 жыл бұрын

And I do thank you!

@bret9741 3 жыл бұрын

Not sure why that was there to begin with. That wasn’t a damn it was a pile of gravel and rock. It didn’t really even serve to hold water as it was porous.

@rey_nemaattori 3 жыл бұрын

I'm not an expert, but the water is already flowing underneath the dam, if that's not a sign nothing really is....

@lnr12241 2 жыл бұрын

Start at 8:30

@slapdashdumper 5 жыл бұрын

the water is trying to find the path of least resistance within the dam which in this case is going to be UP through the earthen parts of the dam ....the force of the water exceding that of gravity . Why did they ever bother with this ?

@evangiles4403 13 күн бұрын

They do this so civil engineering students can see theory being put into practice

@josephastier7421 5 жыл бұрын

10:40 Major failure occurs

@Syrnian 7 жыл бұрын

Looks very odd.

@1Ocqueoc 9 жыл бұрын

Not sure what the purpose was, but it is evident that the dam was not going to be a permanent structure. As soon as the seepage started at the 00:10 mark, the dam's fate was sealed

@FoxtrotCharlie2 8 жыл бұрын

+Randy She.... not so much true BUT dirty water seepage VERY bad

@genogeno1234 5 жыл бұрын

this was an experiment. Read the description. The seepage was not the cause of the failure. Overtopping and supercritical flow on the downstream side of the dam caused the failure

@Chaosfury50 4 жыл бұрын

Video begins when you click on another video. Thank me over there.

@AmericanIdiot7659 6 жыл бұрын

Why would they put rocks instead of like concrete!?!? Edit: (to make it more understandable) They could of added concrete there. EDIT ONCE AGAIN: Oh, they were experimenting it. I should of read the desc.

@jacquesblaque7728 5 жыл бұрын

Yes, you should HAVE done all that, instead of wasting time/bandwidth.

@cricketcricket9749 4 жыл бұрын

Breach at 8:25

@joseph-mariopelerin7028 4 жыл бұрын

and what the difference between ''' a dam failure'' and ''a over-topping dam failure'' ???

@jasonmuller7074 3 жыл бұрын

The same as the difference between '" a comment" and "a KZfaq comment"

@evangiles4403 13 күн бұрын

The dam fell apart even faster after the water reached the top thus proving the basic theory of all dams the force against the wall will keep it in place but once the top is breached you get the two forces compression and expansion at the same time They use concrete for dams and concave walls because the concrete will push against the side walls keeping it in place thus the dam expands slightly as the weight of the water pushes against the wall but once the water tops you get water compressing the dam for which it was not designed for A dam must never breach the top henceforth why most dams start releasing at 95% of the capacity but that is a slow release the amount of water there after can be controlled

@evangiles4403 13 күн бұрын

The difference between a minor oil leak and an oil filter blowing out from too much oil

@garyloger9416 3 жыл бұрын

The water looks like it's appearing out of nowhere.

@iangoldsworthy2056 4 жыл бұрын

I find it very surprising the embankment kept eroding after the river was flowing at level. When building dams you need to build into the embankment not on top of it or against it this is the result.

@Runehorn 9 жыл бұрын

mmmm gravel dam, great idea!

@Stubbee 8 жыл бұрын

+Runehorn They were studying landslide dam failures.

@fernandopo6399 5 жыл бұрын

Skip ahead to 10.30 to see the big whoosh...

@landtechnik4k 3 жыл бұрын

Dam ordered on Banggood.. no Refund

@MrTonyfeng88 10 жыл бұрын

It is overtopping, not overturning.

@lookinforthelightful 9 жыл бұрын

+Quinn ik Who cares

@deanelydiard1846 8 жыл бұрын

+Quinn ik or as we say in N.Z. Australia & England over flowing !

@deanelydiard1846 8 жыл бұрын

My MY aren't we a bit sensitive !!! Countries always start with a capital letter ...

@andrewgraves3529 3 жыл бұрын

I was sleeping and this came on. I thought it was someone frying bacon

@irenedavo3768 Жыл бұрын

Watching April 2023

@tonyduncan9852 6 жыл бұрын

Very demonstrative. Also a stupidity test for trolls, apparently.

@thomaspyefinch7394 5 жыл бұрын

read

@fishpest2039 4 жыл бұрын

Glad to see you back here again tony, still looking for "trolls" ?

@tee.m7216 4 жыл бұрын

Roses are red, violets are blue, I didn't search for this, and neither did you.

@quantumcat7673 5 жыл бұрын

Large scale?!? Our beavers make larger dam than this small thing.

@MagnetOnlyMotors 5 жыл бұрын

Réal Morrissette I was gonna say just that!

@banguscclii2963 3 жыл бұрын

Not even a high dam judging from the height of the guys standing there and the erosion mark on the side.

@Strange-Viking 6 жыл бұрын

damn

@craigbomberger2210 8 жыл бұрын

If that is a "Large Scale" Dam i wonder what a smaller scale dam looks like, probably big enough to barely deal with the water run off from rain going downhill in a street gutter.

@evangiles4403 13 күн бұрын

A small dam is called a weir the difference is a weir is only meant to slow the flow not hold back the water Where I live the Old Oak creek weir is 50 ft so it is a large weir but has little to know water in it for most of the year

@crashnreset6987 Жыл бұрын

Stones don't hold back rivers ;p

@EdStyer 4 жыл бұрын

That's NO Dam! That's a pile of dirt in a wash!

@robinwier 8 жыл бұрын

Tiger Woods would call that construction material "loose impediments".

@weltonvillegal6258 6 жыл бұрын

Hey! A dam is about to break and we’re all standing on dirt! Let’s take out our cameras and film! It’s amazing how long the human race has survived..............

@spikespa5208 5 жыл бұрын

Have to wonder if the guy on the left at 12:17 has a clue of what's happening right below him.

@wileydowler7822 3 жыл бұрын

It would’ve taken you and the three troglodytes who voted your mind numbingly stupid comment two seconds to read the caption, but I guess reading is tough.

@johnmartin1844 Жыл бұрын

This is not a large dam. Geez, a few trucks full of dirt and rock and a bulldozer could make that in a couple of hours. It was not a permanent dam for sure. Looks like someone just made if for fun before the rains hit an obvious river.

@robertg.oberlandersr.2942 4 жыл бұрын

Can't all you "experts" at least get the technology right! It is not being "filmed." Nothing is "filmed" any more. This is being "recorded" electronically!

@gilzor9376 Жыл бұрын

I figure one could say all dams are artificial. I have yet to see one that was not made by man or animal, which makes them artificial. If it were made by nature is would surely overtop and wash away.

@waynetaylor5227 3 жыл бұрын

rock available cheap downstream

@gardnersmith3580 5 жыл бұрын

Four meters is not "large-scale." Looks fake to me.

@josephgood1835 3 жыл бұрын

Darn I guess that don't work out now did it lol

@greenriver520 5 жыл бұрын

It seems like an engineering student study. How to not build a dam.

@thomaspyefinch7394 5 жыл бұрын

read

@greenriver520 5 жыл бұрын

My post was an answer to the others prior, who appear to think this was some sort of hoax etc.

@thomaspyefinch7394 5 жыл бұрын

@@greenriver520 srry :) have nice day. that was a lot of work for a school project. think also the ok permit to do by the city/foresters.

@greenriver520 5 жыл бұрын

Cheers @@thomaspyefinch7394, I think they did well. The only way to learn is to get out there and do it. The theory then makes sense.

@thomaspyefinch7394 5 жыл бұрын

@@greenriver520 i use to build plastic model ships when i was 13-16yrs old. had a small creek, 2' wide, in woods behind house where i would play with the models. broke the aircraft carrier into parts, but kept flight deck in Farley good shape. the 4 planes could take off still. made a dam using dead branches moss and muck. i had fun.

@rpp9961 7 жыл бұрын

large??!!

@ljprep6250 6 жыл бұрын

13.2' isn't anything to snarl at r p/p. That was a lot of water behind it.

@l0chis1 10 жыл бұрын

I'm really not sure what is happening here but this is DEFINITELY not overturning failure....

@iamcarbonandotherbits.8039 4 жыл бұрын

If you wanna get it right ask a Beaver.

@elixtido1448 4 жыл бұрын

there's plenty of that over there if you have the dough

@iamcarbonandotherbits.8039 4 жыл бұрын

A gentleman never expects to pay.

@amandahudson431 4 жыл бұрын

I want my 25 minutes back.......

@johndemeen5575 2 жыл бұрын

Why are people just standing there for. Do something! Fix it.

@ghjklz7587 4 жыл бұрын

I think this video is a Fake The water level on the upstream side of the dam never reaches the Dam Height - In fact in never changes

@iamjonosborne 4 жыл бұрын

I SOOOOO agree with you.

@freespirit8791 4 жыл бұрын

I was expecting more damage but it was childish

@alfr1 5 жыл бұрын

Gravel dams never work. Old concrete driver.

@tedburg6042 3 жыл бұрын

You can tell that to every city and town between Fort Peck Montana and the gulf of mexico someday.

@dogwedl1167 3 жыл бұрын

@eckhardschwarm5133 6 жыл бұрын

in the Film is not enough water behind the Damm to break him

@grampabadger 3 жыл бұрын

Well, that obviously didn't work.

@MrNonch1 8 жыл бұрын

What's the Chinese for " Dam Useless? " Lol.

@calvingreene90 6 жыл бұрын

This was a demonstration of how dams fail it was intended to fail from the start to dissect the results for teaching engineering students to avoid building bad dams.

@sheba9679 6 жыл бұрын

Hihihihihihi funny 😂

@manslayer1972 4 жыл бұрын

8:32 you’re welcome!

@bearpump 7 жыл бұрын

Immmmnnnnjn

@Superduper666 2 жыл бұрын

To me, the results were easily predetermined. Of course the water will dissolve the dirt and take away smaller rocks at the top until enough has been removed that the water flow increases enough to take away bigger chunks thereby continuing to enlarge the hole and allowing more water through. I don't understand the purpose of this for something so obvious. If you are funded for this it seems a waste of money that could be used elsewhere.