On an island Beach in Cambodia i've crash at full speed into an aerial electric cable, nearly invisible on my googles!!! scary to death saw my drone dancing in the air going into the sea! Then finally auto recover with a warning in my google "Collision detected"!!
For dere som kan norsk, dette intervjuet gir trolig dypest innsikt i Ask-saken og kvikkleire-problematikken og mye rundt geologi. Tore Larsen Grønås som bodde i området har gjort enormt mye research om forholdene, og bl.a. gjort anmeldelser av de som tillot tilbakeflytting på meget tynt grunnlag. Utrolig interessant - fra 2023. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-trCdCGygOwo.html
Norway has known about this quick clay for century, why keep building on it. When the salt table in the clay gets to low it looses its stability and turns to liquid.
My heart goes out to the to the people who lost their lives and the families affected by this event! I read that a mum and dad and 2 year old were among the 10 people who died...absolutely devastating. Here's the list of people who sadly died - Eirik Grønolen 31, Lisbeth Neraas 54, Marius Brustad 29, Bjørn-Ivar Grymyr Jansen 40, Charlot Grymyr Jansen 31, Alma Grymyr Jansen 2, Irene Ruud Gundersen 69, Ann-Mari Olsen-Næristorp 50, Victoria Emilie Næristorp-Sørengen 13, Rasa Lasinskiene 49.
Why even build on that quick clay. If the conditions are right simply digging your garden can set off a chain reaction that leads to utter devastation.
1978 quick clay slide in Rissa Norway resulting in just one death>>ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-7L321OBk25k.html Caution, very disturbing video. They need to find a way to re-concentrate that clay with salt,,,or find all of it and get everyone moved off. I wouldn't build a house on all-of-a-sudden quicksand. Surely those housing developers seen and NOW see all the problems with quick clay,,including the 1978 Rissa stuff. How does the old saying go???-----"If you ignore history , , , , , ,..""??. These have been VERY lucky landslides. I guess it will take the loss of thousands of lives at once,, before realization sets in.
The quick clay event of 1978 - Documentary gives a very detailed breakdown of how these slides happen - ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3q-qfNlEP4A.html
Good God and I thought sinkholes were a nightmare. This is far more devastating. Certainly adds to the tenor of the times when you must be suspicious of the ground beneath your feet. Rest In Peace dear souls who had to endure this terror.
It's hard to imagine that you can even farm the clay soil, let alone build towns on it. Clay soils are prone to sliding. Quick clay is the worst because it can liquefy easily without an earthquake to trigger it. Norway has had a number of catastrophic quick clay landslides. They are hard to predict and prevent. Unfortunately much of Norway has this type of clay and it is in flat areas perfect to farm and build towns on. Much of Norway is too steep or rocky caused by last Ice Age Glaciers that buried the area in over 3,000 meters of ice. As ice retreated, flooding washed salt out of the marine clay soils left behind. The low salt content turned regular marine clay into quick clay. Too bad they couldn't just add lots of salt to fix problem. That would ruin the soil and no crops could grow.
I feel for all that was affected. I seriously question any surveyors who allowed this high risk area to be developed in the first place. This tragedy is evidence that the surveyors, engineers and inspectors had to be corrupt or just not care to build a huge subdivision on this project
Just curious - why does someone build residential (or anything else for that matter) on quick clay? Is it that there is not enough non-quick clay land available in Norway?
This type of landscape is quite flat, and therefore ideal for settlements. The soil is good for agriculture. Quick clay is always near the sea, which is where the majority of the Norwegian population live. And there have usually been people there for a long time, making it filled with history and tradition. So while there may be other places to live, these types of lands are especially tempting. And for agriculture specifically, there isn't much suitable land in Norway, due to harsh climate and rugged terrain. Lastly, it can be quite hard for people to imagine such a disaster affecting them personally, especially when they have been living there for a long time. There are probably other reasons as well, but I think these are the most important.
Yep, if you purchase land or a house there, make sure to get a core sample done first. You may need to invest into a few truck loads of salt before you plan on living on it.
whats with the sad fucking music.....some fucking idiot picked this just to annoy viewers. We know its a sad event but for Gods sake drop the fucking music.
Put yourself in the soul of those 10 people who died.... you are in the safest place you know, and the ground shakes then leaves from under you, and chaos is with you until the end of your life....... (good video!)
Here you go slick. Happened in the same country, only this one was in 1978. ENJOY! The Quick Clay Landslide at Rissa - 1978 (English commentary) ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-3q-qfNlEP4A.html Here is a more recent one. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-DopB8CtSn3E.html
As can be seen by the drone footage at the end of this video, there's no indication on the surface of the ground where a subterranean deposit of quick clay might suddenly revert back to liquid, with disastrous results.
Quick clay is a type of sediment deposited by water run-off from melting glaciers thousands of years ago. Normally it remains firm and solid, but under some conditions it can suddenly turn into very mucky water. Since it's underground, it can't be seen, so when it abruptly turns to liquid, that's not anticipated. What you see here is the end result. Quick clay is not the only type of soil which can act like this, and in other places in the world, similar disasters are triggered by strong earthquakes which also turn other types of moist soil into liquid.
You're 100% correct... Other soil could liquefy just like clay, though it's not as easy as clay... Indonesia did had liquefaction incident. We all know it's not clay type of soil. Patrick shared studies of good fact by adding salt to solidify clay. But in my opinion it's also has it's own issue... adding salt on normal days would helped, but during winter, it would only decrease freezing point of liquid inside the clay... all it needs is an influx of water and it will start liquefaction.... Sheepwave also made a good opinion... yes erosion on the water stream river near gjerdum can impact liquefaction, but it's the building itself that I also believe contributing more to the slide.... how to check this? 1. Check where the water of those building are running to... if it's not properly sealed, it could gradually increase the water content in the soil, making the building area liquefied 2. See the clay under the other buildings Undisturbed soil sample as deep as 15m would be good, owh the point should be near all water spill area (sewer, septic tank, rain gutter). the case of Rissa in Norway are due to inclination toward body of water are steep enough to propagate slides even faster, but gjordrum seems more flat. That's why those test are important to see the extend of possible future slides... I also understand Steve frustration, believe me .... not all government officials are thinking for the people... and even if they do, they would have bureaucracy layers to deal with... And even if that's settled, actually doing it would made another complex situation by itself ... budget, corruption, bad project design, (please don't judge me beyond thinking it as a possibility). There are simple solutions for this, 1. Made the river bed solid(this can be done by cementing like Japan, rockboulder like old Netherland and ensure ALL WATER coming out of the buildings are flowed without leaks to the river. 2. The cheaper solution is to Start looking solid trees that can grow AT the waters, and AT the soil near the waters. In Indonesia we have mangrove, and most trees can live very near to rivers. We also have absorbtion well, a good solution but it was poorly implemented here. However, in Norway case the well would be very bad to be implemented as it will trigger liquefaction. I am sure if many contemplating solution, society could chose best for improvement. Wish you all well live long and prosper my friend.
It was a high-risk area. The local municipality were warned several times over many years but didn't do much. The official report states that the cause of the accident was erosion in a nearby stream that wasn't managed well, and high levels of rain the earlier summer. It's funny they don't mention building in such an area as a cause, but what do I know. The police have made criminal charges against the municipality this month.
Black clay (or fast clay) that is left after glaciers and is saturated with sea salt, if the salt is washed out of the soil, it turns into a liquid. And the main reasons in the current times of its washing out are the activities of man destroying the soil, in particular agriculture, irrigation. It is even easier for rain to enter the soil than there were grasses, shrubs or trees that are able to hold back moisture. The river in this place, according to the video, most likely served as a trigger, part of the coast left and the soil (clay) began to uncontrollably turn into waves of liquid clay.
