The Quick Clay Landslide at Rissa - 1978 (English commentary)
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- เผยแพร่เมื่อ 21 มี.ค. 2011
- On the 29th of April 1978, a quick clay landslide devastated large areas of the rural district of Rissa I mid-Norway. One person died whilst 13 farms; 2 homes; a cabin and a community centre were taken by the clay masses.
Five to six million cubic metres of clay collapsed from an area of 330,000 m2 leaving a 1.5 kilometre slide face. The landslide caused great material damage to the community of Leira when a resulting three-metre high floodwave breached the opposite bank of lake Botnen shortly after the main slide.
The Rissa landslide was caught on 8 mm cinefilm by two film amateurs. This is still used actively in avalanche preventative and educational work.
All rights belong to NGI. All or any part of the material on this movie can neither be copied nor re-edited in any way. All commercial rights are reserved NGI. - วิทยาศาสตร์และเทคโนโลยี
I like those old documentaries. They are long enough to watch and understand something.
In a modern docu there would be an endless repeating of the three most spectacular scenes, some catchy music and a really dramatic narration voice. There may even be an action story of a mother and her two children, played by some actors who have never been there at all. The whole thing would last five minutes as not to overstress the average attention span.
Thank you for posting this!
5 minutes, they'd drag it out to 55 minutes more like. lol
The Discovery Channel ruined an entire genre of television programming in this way.
I totally agree with you. All the drama music, paucity of facts and tear jerk sad stories only appeals to today's low information drama queens.
Exactly!
Paul Randig no you dont
Now this is what you call a documentary.
Fascinating indeed. Give me anything having to do with science, technology or natural phenomena and I’m a happy fellow ... assuming it’s presented intelligently.
@@chasbodaniels1744 It's old, 1980 vintage, but there is a REALLY good documentary called Anatomy of a Volcano. It deals with the Mount St Helens eruption from the first rumblings to the the main eruption on 18 May 1980, and the aftermath as well as the lessons learnt. You hear from geoscientists trying to make sense of what was happening, people who witnessed it first hand. It ends with the volcanologists successfully predicting a smaller eruption in August of that year.
But, yeah. This is what I call a documentary too.
I know exactly what you mean. Last good one I saw was on sky in about 96 on the problems caused by drverting rivers. Fascinating.
@Dan Downing yes when people were smart🙂
Right on
This was fascinating. The lab test with pressure and salt was the coolest thing I've seen in a long time. At 45 years old, I had no idea quick clay existed.
SURPRISE Matt, it’s been another hard year for us all. I noticed you replied over a year ago and must be doing the rounds again lol…… But I just wanted to say I agree with you. It’s was the first time I had seen about the clay and salt and realised some of our coastal problems are the same. I just wished they threw a tonne of salt if they happened to have clay in the new building. Here in Aussie we have heaps of clay but a tonne of salt on the coast as well. Greedy salt miners haven’t gotten any salt from our beach areas….. please fix my generation mistakes made. We had nothing when we were young and played outside until the street lights come on then it was home Time. Shower, dinner, homework and a bit of tv then off to bed. We didn’t disrespect our parents and never swore ( not that we knew any, only ones Like . “ you’re a bum - You farted” we couldn’t say that. Get ur kids to respect again. Buy them gifts at their birthday, Christmas. Not when they said “ pleasssee mum pleaasseee”. Ok but don’t tell ur dad lol. Give ur kids lots of love & listen to them. Don’t ever hit them. Ban them from a party, that hurts wayyyy more. Anyways I’m going on like a old lady, who has no one to talk to. Be blessed! See ya next year mate 🙏🏻🫶🏻🇦🇺🇦🇺🙏🏻
I was today years old as well when I learned this. 49 am I. Amazing how much there is out there to learn.
@@janegilmore102you're sweet, I hope mine turn out ok. This doc was fascinating, I'll have to watch it again in a bit. Poor families though. Never did hear about how many didn't survive. Guess I could google... Or leave it a mystery
Don't feel bad Matt, I am 53 and had never heard about quick clay. Must be nerve wracking living on top of it.
I did not know _”quick clay”_ was a thing... added to list of things to fear. Great documentary !!
"time to dig a hole" "uh, the hillside moved from where I dug that hole......shit. Legs, do not fail me now!"
In the UK we call it London clay, it was discovered here while building the London underground in the 1800s, it stretches just north of the river Thames under the whole south downs to just the other side of the Channel and west to the Isles of Wight (white). Now that is scary well over 1 million people live on top of this, good thing it is safe, that is till it desides to come out where it breaks the surface.
@@Melian_Dialogue You can not make bricks out of London Clay, to unstable, just a little bit of vibration and it turns to water, a drop more water and it like a liquid, as they found out while tunneling London underground during the Victorian era.
Oxshott heath did not make bricks, it supplied sand from the sand pit, also London Clay is green/blueish in colour.
It is used in other ways, like for course pottery and London stock bricks, but it have to be burned/ heated up to dry, then refined to remove most of the sand, but then its no longer London clay, it turns to a brownish yellow/ burned yellow and is added to another type clay to make London stock
Be afraid: be very afraid. This is a dangerous planet.
@@Melian_Dialogue you are bloody joking I hope, tunelling though London clay killed a whole digging crew, collapse in other places. A whole new technic had to be developed in tunnelling because of London clay, a technic that was used when doing the channel tunnel, you could not dig and shore up and then shaping, it had to be shape, shored and sealed at the same time, vibration turns London clay to water, a lesson releard here in Southampton when they built the the first Marchwood power station, a piling company went bankrupt, because it was driving piles into the London clay and the vibration turn it to water and the piles was lost, the second pile company bored holes down into the London clay and pump tonns of waterprof concrete mix into the London clay, same way they had to do the tunneling in the underground north of the Thames.
I work on the digging out of the new route on the jubilee line, which is built in London Clay, the ground was frozen before any mole tunneling started.
For brick use the sand and clay had to be seperated refined, but then it is no longer London clay
At 73, I am still learning. This was interesting and informative.
Only four days ago there was a new massive quick clay landslide in Ask, Norway, some 300 meters wide and 700 meters of length. This is the second major landslide of this type in Norway in 2020. Only last June, at Kråkneset in Finnmark, an area 650 meters wide slid out in the Alta fjord. Luckily no humans lost their life then, but the one happening now on December 30, has since resulted in 5 human casualties, and still there are another 5 people missing. In 1978 the quick clay slide in Rissa, described in this film, happened. It is without comparison the biggest in the 20th century. In Norway there are currently about 110.000 people living on quick clay ground, and many are worried after what just happened in Ask. There was little media attention around the incident last June, but with several casualties and around 1000 people evacuated, the focus is much stronger now. However, the official agency for watercourses and energy, NVE, tries to reassure anxious people by claiming that there hasn't been a large quick clay slide in Norway since 1893, most remarkable. It's as if the slides last June and in 1978 didn't occure. In 1893 there was an enormous slide in Verdal, considerably bigger than the other three mentioned put together. Then an area of about 3 square kilometers vanished and took away 105 farms, 116 people and thousands of farm animals.
Terrifying
Fascinating, informative, not a hint of dumbing down, they don't make 'em like they used to...;)
@Spartacus Mills Well, his perspective was from 7 years ago.
@@e3IZrZ Well, this video has seemed to pop up into peoples watch list from nowhere.
@@EamonBreaks So glad it did. That was properly good!
@@EamonBreaks Well, that is true, but doesn't change the fact in 7 years people can completely change perspectives on life.
Absolutely not. Speaking of glaciation, isostatic land uplift and the like; such a pleasure to hear a documentary that doesn't presume everyone has the attention span and intellect level of 2nd graders and needs everything broken down and spoon fed to them. I can easily visualize one of my teachers in school pausing the video tape (or even film projector) and explaining what "isostatic land uplift" was and suggesting we write it down because it will show up on a quiz or extra credit question or something :)
Fantastic documentary. To the point, informative and no hint of dumbing it down, no unnecessary drama, no unnecessary repetition or filling.
Hmm... a documentary about clay, ehhm. 21 minutes later: that was very interesting.
I didn't like the oatmeal runders much. But we have a granule box to deal with, let's go.
21 minutes later: "Damn! It's already over?" :)
Congratulations, you are now officially a Nerd. Welcome to our club.
It sounds like they needed to dump salt all over the place.
@@ParallaxView111 Trouble with that is the crops would not survive... would be ok if the area was uninhabited for a temporary measure.. Nature in time would just let it all slide into the lake until just bedrock left..
Excellent. That's how a documentary should be. No flashy graphics, no endless repetition, no dramatic staging -- no dumbing-down, in other words. The Discovery Channel has a lot to answer for.
Well look at who made this! The D. Channel's top priority is selling deodorant, beer, and cars, same as any other for-profit media outlet.
That was refreshing. Thank You !
A REAL documentary that covered the required who, what, when, where, how and why
that is supposed to be the template of education and guiding mandate of journalism.
Can't believe I watched a whole documentary on clay. But glad I did.
We are the clay folk and we know the clays sneaky slippy secret!
This documentary was a joy to watch. Liquefaction when the salt is removed and solidifies again when added....fascinating stuff.
Could so easily have turned this in to a blockbuster movie but they resisted.....thank you for that.
Claynado 2: The Saltpocalypse.
And this was known in the 19th century. It's in the brittania encyclopedia...
Watched it in my geotechnical engineering class 20 some odd years ago and I was fascinated!
Joy my ass, the world will end in 70 years.
@@carolewilson1803 'Joy' in the sense that it was presented without being sensationalised. Apart from that, the event was a catastrophe.
That "quick clay + salt" was very interesting.
It *WAS*!
I read that it’s because of the electronegativity of the clay, causing it to slowly repel neighboring clay particles and overall weaken.
Salt contains electropositive sodium, which associates itself (bind, if you will) with the electronegative clay particles, nullifying the repelling forces and facilitating compression.
How sad as well, though... the documentary is from Norway, my home country and the same country the latest quick clay landslide happened, just one/two days before the new year. Already confirmed casualties as of 3rd of January, and thousands of people evacuated. This video proves the severity (and I believe the unpredictability) of quick clay landslides, and the recent landslide just reinforces them.
If anyone intending to build homes ever read this: *Never build on quick clay!*
pretty realistic result right before you eyes
I learned a lot from watching this. It was well structured to show the underlying causes of the weakness in the land. The footage of the disaster was spectacular. The recovery method and process was interesting. It is sad that a person died, and remarkable that others who lived on this land were able to leave in time to save themselves.
Thanks to all who made this possible.
Someone linked this video from a reddit post regarding the new landslide that happened in northern Norway.
Such an old documentary but it's very informative and well made.
I just wanted to see the landslide, but I ended up watching the entire video. That's how you know you've made a really good documentary.
Years ago I learned about geologic slump from a documentary, but this is a totally different animal. most people are used to geologic forces moving too slow to notice with the naked eye, so when an event like this happens we are in awe.
Just imagine: Your house goes down with the mud. In it are your childhood photos, the letter of your first love, the recipe of your grandma's favorite cake and the bike you have been renovating in every spare minute during the last two years...
Those were some well built houses as they looked like they were floating in one piece.
@@u4riahsc Houses have to be built like that in nordic countries. Cheapo and flimsy US-type housing would be cold as hell in the winter and most likely would not stand the snowload on the roofs. The amount of concrete as the base and all the two-by-fours in the walls every two feet really makes the difference. Yes, there are sturdy building types in US and Alaska but they are few and far between, most are built as fast and cheaply as possible.
I would bet Canadian houses would have acted the same, they have to be built to endure same kind enviroments as in the nordic countries.
Fortunately I don't need to worry about cold weather living at the beach in San Clemente - tsunamis maybe...
@@u4riahsc In Florida the ground is just as likely to swallow you though.
@@alaric_ A 2x4 every 2 ft. would be considered the weaker houses in the US
I liked the creepy, foreboding synthesizer music that accompanies the active disintegration part.
hebneh no you dont
Delia Derbyshire's work perhaps?
reminded me of watching the old Faces of Death films from the late 70's and early 80's.
@@Elon_Trump That may be but they used this music all over, even childrens programs at the time used this type of music at the time.
I love that stuff. Reminds me of older horror movies
Poor guy was simply adding on to his barn and the next day was the brand new owner of lake front property!
Irony the people indirectly responsible for the start of the slide were the only ones whose farms didnt vanish
@@edwardbakadingo4261 if you check on the map that farm is no longer there
@@OprichnikStyle Ruin the buzz! :(
Not sure if you could actually call (or hold) them responsible cause even without them the whole thing would eventually come down on its own, possibly with much more disastrous results
@Malin Storvand Well the problem is that salt does gradually get flushed out by rain and other natural processes, at least in that particular area. And the longer it goes the more unstable clay gets, and the less disturbance it takes to trigger the collapse, and the faster it will spread. So maybe their neighbours should thank them instead for setting off the disaster while the clay was still stable enough to give them time to escape to safety, or their children could one day experience the whole area being flushed down into the lake like a toilet bowl all at once from something relatively minor like a passing heavy truck or something.
Having actual footage = IMMEDIATE WIN.
17:34 Smoke ring!
Oh yes, not often seen with blasting I bet!
Looked a lot like the cloud when the sound barrier is broken.
Nice, good catch.
Smoke ring - not enough stemming material, if any. Good idea to stand faaaaar away! Not that a field of clay that can 'magically' turn into thin goop isn't cause enough to stay the heck away!
You beat me to it. Came into the comment section just to post a link to the smoke ring! 😂
"I'm sexy and I know it"
-That drill operator
Hugely informative documentary... I suggest the residents of Lemieux, Ontario, Canada were spared disaster in 1993 because of this type of exacting work. Much thanks to the uploader.
If you know there is clay around your house, and you want to do some digging in the ground(upgrading). There is a method of avoiding disaster. Use a long hollow Spear, penetrate the surface down to two meter, and inject saltwater into the ground(clay). This way the clay would stay solidified long enough to do the work and not worry about Quick clay disaster
It’s 2019 and TH-cam recommended this. Well done, very informative documentary.
th-cam.com/video/Nomlo8X58PY/w-d-xo.html
T’was also recommended in 2020. Now C-19 is a world wide catastrophe.
Wow didn't expect this to be interesting. Thought I was watching netflix or something. Thanks YT algorithm, you win this round.
New landslide in Alta, Norway, from June 3rd 2020 can be seen on TH-cam.
60 years and I'm just now learning about quickclay. Great video. Thanks for recommending an 8 yr old video YT.
Watching this after the slide in Gjerdrum. My heart goes out to missing people.
This hits home, literally. 😞
Quick Clay landslide sounded odd to me and I had to see that this was. Could not stop watching such good information! Thanks for posting.
Excellent documentary, I loved the models, quite nostalgic how things were done before the digital era. Hope this kind of geological assessments take more importance and are conducted to prevent disasters such as the one in Gjerdrum, yesterday.
do you know what modelling software they used?
“This house moved with a velocity of the order of thirty kilometres per hour” 9:13
That’s proper old school English language right there.
OK boomer
*a velocity
@@sdh643fn weak. So very weak. Ignorant millennial strikes again.
What Me Worry ... Even worse.... it might have been a centennial... 😩
Wow! A documentary I learned things from--I MISS those! That is just...insane. I had no clue this kind of thing happened.
31. desember 2020, Norway, this documentary is really helpful. Ask, Gjerdrum had a massive slide yesterday 10 people still missing right now.
I only learned it from my parents on New Year’s Eve. Five causalties have already been confirmed as of 3rd of January...
This is the worst way to start the new year! 😫
@@Operational117 2020 had its final blow before coming to an end... 😥
This driller without shirt on is classic !!!
@CSXRockford Yeah Wouldent happen now ! I loved living in these old time as a kid ! Miss those days
@0ff topic guy Go on....
Yeah... sportin' his Daisy Duke's ! Funny shit right there.
@@mattywho8485 I couldn't quite believe my elderly eyes when I saw Sven the clay gatherer shirtless and in the Daisy Duke's. Didn't quite go with the rest of the documentary and the narrator with the English accent.
Didn't know "The village People" had construction type jobs!
Liquification is scary! My whole town is built on clay, I feel like running outside and killing my whole garden with bags of salt right now!
I live in Quebec on a hill. my neighbors showed me they have geothermal installed. And one of them told me his house is sitting on grey clay! Lol I am not going to install geothermal now!
@@mujkocka Clay that has already been through the collapsing process after losing its salt is OK. The dangerous stuff is clay that hasn't yet: clay that has settled in salt -- which glues the microflakes of clay into a house of cards, standing on edge at random angles with lots of water in between -- and then has lost the salt, so it's still a house of cards but with no glue any more. Bump THAT and it turns to soup. See th-cam.com/video/NYqfI5195Ig/w-d-xo.html
Once the soup settles to COMPACT clay with the excess water drained out, it's stable and won't turn to soup and slide. So you might want to have some geologist drill out a core sample and tell you which kind you're sitting on.
Math, facts and clarity, why aren't current day documentaries like this?
pixelsdontmove because we are generation of smartphones and not so smart people
Media is purposely dumb down the masses.
Because documentaries have become little more, for the most part, than reality TV disguised as a "documentary." Dramatic music, zooming in and out of faces and locations, DRAMATIC COMMENTARY BY THE ANNOUNCER.....you get the point. I'll take older documentaries, factually done and well presented, any day. More sad is when you see a current documentary (such as one I watched on Hurricane Camille, done by the Anything But Weather Channel) that still repeats old myths that have long since been debunked.
Let’s just say the IQ of the US and U.K. today is nothing like the IQ of British or Norwegian public in 1980.
Masses were always stupid cattle, but those who were interested in documentaries had higher standards. The average person didn't care then, either. This documentary is not for them.
It was seeing documentaries of this quality which inspired me to study geography and geology at university.
Omg the soundtrack is phenomenal! Reminds me of Throbbing Gristle or of any of the band members' separate projects. Bless you for listing details about this well made documentary. The death of anyone is always a tragedy and losing property like that was terrible so it was good to see the recovery process documented as well. Reflects our unbreakable resilience in pushing forward, sometimes harder than forces which push us back.
Guy who started the whole spiel: "Lemme just say, from the bottom of my heart,...my bad."
Yeah: hindsight is a wonderful thing, eh?
We'll just let that one slide. ♡ T.E.N.
@@tracynation239 and HIS house and barn are still there; while his neighbours for generations got a pile of muck. probably pretty tense down at the Legion on Sunday.
Tracy Nation ... Aaahhh... I see what you did there... Clever...
I bet his heart sank. And some farms.
Thank you for posting this. Old style documentaries make my heart happy.
The background music is more terrifying than the slide.
Scary stuff. We use terms like 'solid ground' in exchange with a sense of security. When the very ground beneath you or around you gives way I imagine every sense of security goes right along with it.
I don't think it was 'solid ground' since they were built on a previous slide.
It was a clay bluff the glaciers made that sprang up 200 meters when 3000 meters of ice melted. The liquefaction was triggered by overloading the shoreline. Who would have thought? The Earth can kill you in an instant and will not even feel sorry. Wild fires in CA today.
PUT A YELLOW HELMET ON YOUL BE SADE
So well done - fast-paced and no extraneous information. Well worth the time.
2:30 to 3:35 one minute and five seconds of the best explanation of quick clay ever!
Thank you for uploading this well made documentary, of course thanks to the unique footage of the local amature filmers. Thanks to their effort and immediate actions we can enjoy this very educational movie.
And now, yet again, another one of these disasters in Norway, in Dec. 2020. There have been two in 2020.
Actually it was just waiting to happen... The weight of that dump triggered it...
Had he not triggered it, maybe the next dig would have, or even the rains.... What if it happened at night...??
Thank him for doing it in broad daylight on a sunny day.
He probably saved lot of lives .
The country is full of similar topography and that specific area had been farmed for centuries without such a slip occurring.
@@benedictearlson9044 Doesn't mean it would not happen, land slides happen often in Norway.
naked + helmet = safety
I am glad to be sitting comfortably while reading this comment. Would have had to grab the nearest chair for support otherwise. Too funny!
A man from the local gay bar, and fan of the village people, was mistaken for a construction worker and pressed into service drilling test holes.
@@BrettonFerguson PRESSED INTO DRILLING HOLES YOU SAY?
That's funny
You seem to be under the impression that normal everyday shirts provide some sort of "safety protection" for drilling operators. That's humorous.
An intelligently made and presented documentary. Extremely interesting and very educational.
Best doco I have seen on UT for many years.It never fails to amaze me how nature recovers albeit with a bit of a hand from explosives heavy machinery and re stabilising
They should play that music in dentist's waiting rooms
Alan , you are a hilariously disturbed man.
sadist
😂
So I saw one of those click bait videos on Facebook about "nature disasters" or some similar post. There was a little video of a quick clay slide in Norway. "What's this quick clay all about" I ask myself. A little hunt around the internet leads me here. Now I'm a quick clay expert!
Very informative!
fantastic video which always reminds me of my university professor who put his heart into supervising my dissertation.
This was really well done. I'd never heard of this, how fascinating! Sad that someone died 😞
But nice that the farmland and their beautiful farms were able to be restored
Old school documentary. Straight to the point with no fluff.
Nothing replaces real-time footage. This was a gift.
Thanks for posting this. Extremely educational work.
Yeah whoever was told to "move the dirt" needed a raise. They sure did an effective job haha
12:56 How he said "Leira" is pretty much perfectly spot on. Well done, narrator!!
Excellent and thank you. I'm familiar with an area in Eastern Ontario, Canada where there is a similar deposit and a liquification of the clay basically "wiped out" a small village about a century ago. I've explored the area and read about the process but did not know about the role of salt ( the area is about 230 feet above current sea level ) or the speed at which liquification occurs. The documentary was well produced and fascinating.
Thanks again.
The creepy eerie music during the sloughing is spot on. The moral of this story: always move surplus soil to your neighbor's land.
I cant help but feel tremendous pity for the family that caused this.
As far as I can recall, this is the most fascinating thing I've ever watched.
I think the 'apparently' kid should review this. 🤔
Excellent documentary that is relevant to the May-June 2020 quick clay landslides at Alta, Norway.
“Hope you like your new barn, Sven!”
I always thought the area could do with a makeover. Careful what you wish for, I guess.
Watching this because it's my Geology Homework.
Very interesting. Normally we think salt in the soil is bad. But here it helps to stabilise the clay soil.
This film really takes you back to high school science class, doesn't it? What a fascinating video, though. I knew of the properties of glacial marine clay/quick clay before this, but to actually see it liquefy in real time is chilling.
Sorry, I mean glacio-marine clay.
This is what probably happened yesterday in Norway, the sliding land and houses moved in the same way.
Was brought here by a link someone posted about the latest slide. This really helped explain how such things happen and apparently regularly in some places.
"Feet, don't fail me now!"
Reminds me of the old Bill Cosby routine about how people used to always laugh at black actors in movies because the monster came in and the guy said something like "FEET, DO YOUR DUTY!" and ran. While everyone was laughing at him, Bill Cosby ended by saying "You've never seen him get killed!"
Same thing here. Sometimes, "Feet, don't fail me now!" is the best choice! :)
Sgt Bilko movie
I like the fact that all the comments are favourable. In uk in the 70's we used to have a weekly science related programme which was made in a similar style to this. The facts from the main remained with me for years. This one about quick clay is something I had never heard of I spite of working my whole life in construction and civil engineering. Brilliantly informative with no gimmicks or celebrity presenter.
I miss old school documentaries! Thanks!
Love the shirtless drilling. If you're going to set up a drill rig that close to the shear zone, lack of PPE is one of the least important things on your mind.
Hey, he's wearing a helmet!
I initially thought he was a nudist
@@Raquellinhares For visual effect 🙄
Actually shirtless drilling is *safer* than drilling whilst wearing garment which could be entangled in the rotating parts.
yellow hat dont help when whole hill side moves the only saftly is your mind and your legs RUN.
Fascinating material and the phenomena is explained easily for everyone to understand. I did know how landslides normally work and processes may cause which outcome but seeing it evolving is kind of different.
Altho sad in ways. It is good to know this footage and a slice of history was saved made public.
These documentaries make my day at work a blast
all because that one guy wanted another wing in his barn...
Nobody could expect that digging what was basically a big basement would result in a country mile of farmland turning into runny snot.
The basement dig was undamaged, and the barn still stands. I wonder if they ever finished that job. It would make for some awkward encounters with neighbors for sure.
the dig didn't cause the slide. the soil conditions did. the desalination of the soil over thousands of years and the cultivation in recent centuries allowed for chemistry to take over. scary, eh?
seriously? really?
Yeah, it was going to slide, and this poor guy just happened to trigger it.
I’m willing to bet no one lived there after the slide! Or anywhere near it.
i bet that fucker was popular ?
Fascinating! I'm glad I stumbled upon this years after its upload.
Also, I can't believe how ancient '78 looks. I guess I have a very delusional view of time-or more likely, I'm in denial.
Time flies i was born in 1983 now closer to 1945 than 2023
Well done documentary of something I'd never been aware of. I don't even recollect reading about it in the news or seeing it on TV. What blew me away most was the little demonstration of the properties of the quick clay. Salt? Never in a million years would I have thought of that. I am glad that someone was there with camera to record the event and even happier that only one person died. The locals lives were disrupted but they were taken care of and recovered. I take it that the slide recorded a few years ago was caused by the same factors.
I’ve never imagined this kind of instability in a country like Norway. I always thought the country was as solid as all the mountains and rocky sea shores I know of the country. I have been camping in the country (everywhere south of Bodø) and the ground almost never was easy to put a tent on (except for directly next to rivers and Ekeberg 😂). What a crazy and surreal threat that trying to build a new foundation for a barn results in a devastating collapse of a complete countryside.
Guess they weren't to popular for triggering it although it clearly was fated to happen
A great and very informative programme, only one life lost with all that destruction, the camera work by the amateur cameramen was good, and the information about how and why it happened very informative, watch it, it`s well worth it.
amazing video! I just gotta wonder about the conversation the neighbors had with that initial barn expansion owner...
I don’t know what is scarier, the music as an entire house drifts along on top of a wave of liquified clay, or the construction dude in the short shorts. Isn’t it kinda hard to move around in jean shorts that tight?? Gotta love the 70s!
1981 Documentary great content and explanation without any distracting ads.
All who are watching for a possible Geotech quiz...
Was mandatory watching in my Engineering soils lecture... was a top lecture!
Slick video! All from digging a basement.
(BANG)
Mindblown!
Thank you - this will be a great movie to start the lecture in Soil Mechanics!
What a fascinating chain reaction! To think it all started with excavating a basement.
FOOTINGS FOR FOUNDATIONS
Representing Portland State! Waiting patiently for Cascadia..
Hopefully not in our lifetime.
Thank you, extremely well made documentary even a layperson like me can understand.
My jaw dropped with the adding of salt experiment. Amazing
bone chilling film sequences. and an excellent documentary. Thank you for uploading!
A question, if the original excavation at the barn had not taken place, would the event likely not have occurred? Was the trigger simply caused by storing the excavated clay by the shoreline, which provided an entry point for the liquification of the clay? Just curious.
I would have to say yes. I mean it didnt take that much to start it off so the process was ongoing and reaching a tipping point. One good storm and i think the water from the lake would have started the process.
@@Volgan16666 Obviously landslips occur frequently via natural processes but I'd say not as a guess. The land had been stable for centuries and this sort of topography and soil structure is extremely common in that area. The lake is small and sheltered so storm waves would be minimal and would not replicate hundreds of tons of weight on a single point.
So that farmers project started a domino effect that destroyed an entire township! Sounds like the kind of mess I would make.
It was an inevitable slide. His dirt mound was just the unfortunate catalyst. Imagine if it had happened in the middle of the night versus day when everybody is awake?
Anyways, I live in east Tennessee and we have red clay everywhere, and it's usually extremely stable (actually very hard to dig in with hand tools. Just add some sand and it's basically concrete, no joke). This quick clay stuff is frightening. Seems like adding salt to the clay stabilizes it?
@Agent J Actually somebody did die. Did you mean to reply to me with these comments? Seems *extremely* random. lol.
Very educational. Thanks!
great documentary, what a great learning video - thank you a NGI for creating it, shocked I had not seen it before now
Well done, without being over-done.
And in Dec 2020 this time in Ask (Norway) it happened again...
Thank you for posting this.
Well done on presenting such an interesting and informative video.......also, a great joy to hear such fine diction! Sad to see that such disasters happen in my. favourite country. Best wishes from England to all those affected, I hope they were able to get their lives back together again.