Debris flows - when creeks turn into torrential floods
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- Опубликовано: 29 авг 2010
- Our flexible ring net barriers against debris flow withstand high static and dynamic loads. They can be installed with a low outlay of material and man-hours, significantly reducing costs and construction time. Emptying after an incident is simple by lifting the nets.
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That’s quite a good comment, thank you! That's right, there are some barriers which remain filled. Some are in a multi-level barrier system. That means, that several barriers are installed in a row, the filled barrier will be overtopped and the next barrier stops the debris flow.
But you can also empty a filled debris flow barrier. After the material excavation, an inspection and maybe the exchange of some components is necessary. Afterwards the barrier is ready to stop the next debris flow.
That's incredible! I never would have thought that ring mesh could do that
Any debris left in the net protects the net; clever.
Rocks and boulders trapped in the net make for a porous sieve, allowing water to pass but holding back rocks.
Again, clever!
I love this idea. I can't help but be reminded of the simplicity of 'hesco' bastions. Like the hesco, your ring barriers fill with debris and strengthen themselves through tension. Looking at the end result, you effectively have layered retaining walls in the shape of a rice paddy.
My question is as follows. Have you lot ever considered pre-placing some system used for permanent ground-level shoring of the debris fill-in? (Picture an underlying mat including another ring barrier) I'm no structural engineer, but my layman logic makes it seem like an idea with potential!
Anyway, thanks for reading this far, if indeed you still are. Keep up the good work!!
Hi Derek, have a look at this barrier in Switzerland: www.geobrugg.com/en-Galerie-Maachi---BLS
Also, there is basic research that might answer your question (search "Merdeson").
www.geobrugg.com/file-48897/downloadcenter/level1-level2-level3-research-papers/Research-2016/Debris-Flow-Protection-Systems-for-Mountain-Torrents-2016.pdf.
For more questions, please contact Geobrugg in your country: www.geobrugg.com/en/Contacts-8098,7847.html
Best regards from Switzerland
Absolutely fascinating. Thank you 🙏🏻😷👍🏻
Excelent idea!
Thanks for posting this. It is very well done.
Very interesting and informative
ok that one worked great but they said they are not going to clean it out so it was a one time use the next one is just going to go right over all of it
And eventually those cables will rust thru and fail leading to extra material for the next debris flood to pick up, making for mega debris flows.
This is a good way to stop or minimize the flow of debris whenever Mother Nature strikes.
Smart I'm impressed
Молодцы, похвально.!!!
Great idea
vivo en chosica zona de alto riesgo la caida de lluvias en la zona alta extra fuerte soportara estos enmayados hay piedras que cae de 2 metros cuadrados de alto la quebrada carosio de chosica es una sona muy alto bien parado tiene 7 carcavas grandes de ambos lados cae piedras resisitira estas mayas dinamicas
Se nossos governantes estivessem interessados, poderiam usar esse tipo de "tecnologia" aqui no Brasil.
Creio q nossa atual Presidente poderia até gostar da idéia, o problema é conseguir fazer chegar até ela.
Tudo aqui no Brasil é muito difícil.
So if its not emptied how many times can you install them in one channel then what ? Are you not back at square one ?
Thank you for asking Dave! Please see the questions we have already answered on this topic. There are also good reasons to leave several barriers filled in the channel bed.
Keep up the research please?
Okay they worked great , they did there job. But over time those 3 catch all fences are now full to capacity. Wont the next torrential downpour just ride over top of them now, like before they were there in the first place? I hope you know what i mean, and that im not sounding like an idiot. M.
Hi M Henhawke
The standard proceeding is an excavation of the nets and - if necessary at all - repair of damaged parts.
It is also possible that the retained debris flow material stabilizes the banks of the channel and thus reduces the formation of further debris flow.
(example on our website www.geobrugg.com/en-Favazzina).
You might also be interested in this debris flow impact.
www.linkedin.com/feed/update/urn:li:activity:6836262698389389312 We will continue to inform about the proceedings.
Did we answer your questions?
@@geobrugg Yes ,pretty much. I do find this very interesting. I will check out your website and the flow impact site. I should of looked into this study when i was younger, im 57. I can still watch from the side lines i guess. I shall look forward to hearing how things work out. Thanks for getting back to me, i appreciate that. Stay Safe M.
Whaaaaa..that slideshow nearly induced a seizure!
How did this stop enough to do any good?
Hi Marlena, we have quite a few successful projects with filled barriers. Recent examples are Camarillo Springs (USA) www.geobrugg.com/en/Camarillo-Springs-emergency-Debris-Flow-Barriers-74462.html or this project in Peru www.geobrugg.com/en/ANA-Chosica-22-barriers-for-nine-valleys-75692.html. If you want to know more: Contact us! www.geobrugg.com/en/Contacts-8098,7847.html
what about when they get full, what do they do then
The answer is not very satisfying: It depends. To empty a barrier is an option. Sometimes a filled barrier stabilizes. For example at Favazzina www.geobrugg.com/en/Favazzina-86955.html?markierung=favazz
At 5:58 the narrator says they're simple to empty with an excavator. Yeah - I've seen of lots of flood prone rivers, mountain valley's etc. that a excavator could reach - bullshit! The idea has merit, but cleaning it out afterwards is fanciful making it a one time use scenario. If it's your home or business in flash flood prone area at risk of damage - maybe one would think it a great thing?
You are drastically underestimating the mobility of Swiss spider excavators, Mr. RUclips expert
www.machines4u.com.au/mag/spider-excavators/
Good
Cool....
It works great!!!! ONCE.
So how do they go down in the valley to clean it out? Might need a spider hoe-fill super sacks, and fly them out with a helicopter.
Hi Michael, thank you for asking. This depends very much on the local conditions and the equipment available in the country. Generally, the net can be cleared form upstream as well as downstream. Emptying the net from upstream is more maintenance-friendly. The material can be removed and transported away manually or with a mobile excavator. From downstream the net gets opened and the rock debris can usually be cleared away with an excavator and deposited on-site. The net can then be closed and the #Geobrugg debris flow barrier regains its full retention capacity again.
Tetrapods can do this job!
+dp There are usually several solutions for a problem. Heavy concrete structures are well-known and probably tetrapods are also an option. In a specific analysis main questions would be: How to transport those heavy concrete elements to a remote area? (Be aware that our tallest debris flow barrier was 14 meters in height.) How to stabilize inside inclined and usually easily eroding torrents? We will be happy to provide you support if needed.
Most impressive. However, if the zoning and planning departments did their jobs and stopped letting persons and businesses build in flood zones. Let the flood go downstream and stop idiots from causing the rest of us to rescue them.
If this was in the US, people would steal the shackles and sell them on eBay.
If necessary there is a way to prevent this.
Let nature take it course. Less hassle.
+JolietJake64 But if you let nature take its course (those with higher education’s please check your egos at the door) then there would be no need for higher education…..
not if you live in the way of the flood
Great reply. And this system is quite spectacular. Human beavers.
It is pointless because when all after your barriers are filled you’re back to square one the stuff will just flow straight over it the only Way to keep them working is to empty each barrier every time they fill up
You are right: You have to do something when the barriers are filled. After material excavation, an inspection and maybe the exchange of some components the barrier is ready to stop the next debris flow. But even the filled system can have an important protective function (slowing down the velocity of debris flows in future). Check our example Chosica in Peru www.geobrugg.com/en-ANA-Chosica---22-barriers-for-nine-valleys
Once they get filled up with debris...! And time will corrode the chains links...! It's a huge dam disaster waiting to happen that will be ten times worse in magnitude than the original.
Dear Carlos, this system does not create a dam or a water reservoir after a debris flow. Depending on the material held back (scree, stones, trees), the water can also flow through or over the debris flow barrier when it is filled. Even the filled system can have an important protective function (slowing down the velocity of debris flows in future). It is more common to simply open the net at the bottom and remove the debris. The net can then be closed and the #Geobrugg debris flow barrier regains its full retention capacity again.
👍
And higher BNP
Glad we don't have debbry flows here. They sound terrible.
up you
Sure matzfratz, people like me. Do you know what a fluvial geomorphologist does? Quickly now, no google allowed.
+ Mandoflash
My first guess right off
the top and no Google search is that you reinvent the wheel with no real
ability of being able to change reality.
samir payeng90
👍🇸🇪❤️.
debris flow...good.....human debris flow....bad
It’s just a net 😂
woman
Stupid title ...
You are right. We changed it.