The Most Dangerous Dams (2019) [video] | Hacker News Reader

The Most Dangerous Dams (2019) [video]

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Another good dam video worth watching, about undamming the Hudson:

https://www.youtube.com/watch?v=Sg2wxsYtzOs

I think because of the Michigan dam collapse I've been caught in a YouTube loop of getting recommended (and watching) dam removal videos for the last 24 hours.

Vaguely related - I found this on Reddit's /r/todayilearned a few days ago and the video is astonishing:

https://en.wikipedia.org/wiki/Pantai_Remis_landslide

https://www.youtube.com/watch?v=H6Ma0SVjMHA

Really wish they zoomed out so you can get a sense of the scale...

It should be mentioned that if you find yourself in this situation and there are no other options, the best way out is to actually dive immediately close to the dam with the submerging water while you still have strength and air. You are aiming to be carried by the water at the bottom that is not circulating.

Trying to float serves no purpose and may actually bring more people in danger who will feel they need to help you.

If you try to float you will be constantly rejoining the part of the system that is recirculating. The only way to leave the system is with the water at the bottom.

There is no guarantee of safety, though. You can get banged up pretty badly at the bottom, hitting rocks, etc. Loose consciousness and drown. The best way is to recognize the danger and never let yourself find in this situation.

Great YouTube channel. Watching his videos, I’ve learned a lot about a subject I really never thought about before.

I just discovered them too. His videos are really great. Well organized and well spoken. Really easy to digest and understand.

My favorite is the Culvert video, and really any of the water ones.

Ok, so what is your best course of action when you find yourself in a hydraulic jump?

Did he use the word "recreator" as in "one who participates in recreational activities"?

Is that commonly used in the US? It sounded very peculiar to me - almost like one of the famous George W. Bush neologisms.

Commonly? Not sure, but it's a loanword from Latin, so it's not a neologism, or anything.

Growing up in the US, I never heard it used that way. It could conceivably be engineer jargon.

> Is that commonly used in the US?

It's commonly-enough used that it appears in most dictionaries of American English I can find easily, but rarely enough used that I've barely ever seen it in use and never heard it in conversation.

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