Practical Engineering - 2019-02-25
A weir is a small dam built across a river to control the upstream water level. Weirs have been used for ages to control the flow of water in streams, rivers, and other water bodies. Unlike large dams which create reservoirs, the goal of building a weir across a river isn’t to create storage, but only to gain some control over the water level. Over time, the term weir has taken on a more general definition in engineering to apply to any hydraulic control structure that allows water to flow over its top, often called its crest. In fact, the spillways of many large dams use weirs as control structures. So how do they work? -Patreon: http://patreon.com/PracticalEngineering -Website: http://practical.engineering Writing/Editing/Production: Grady Hillhouse Tonic and Energy by Elexive is licensed under a Creative Commons Attribution License Source: https://www.youtube.com/watch?v=U6fBPdu8w9U This video is sponsored by Skillshare.
Me the next time I see a weir:
"It's actually called a weir."
lol i always thought it was a vaier
Same here
How weird 😅
I thought the same the first time I saw this video, but now I know, I'll never remember that term.
Weired flex but okay.
Youtube: Ever wondered about Weirs
Me: Nope "click"
And yet i watched it all, great vid.
That's the algorithm knowing more about us than yourselves
LMAO me as well.
He lost me at ‘mitigate’ yet I watched it.
Same!
Weirwulfs?!
youtube randomly recommends this video and I find it interesting.
It wasn’t random.
Ditto I love this guy’s videos
Do watch, /the social dilemma_
I relate with this comment
That's how everyone finds this channel, no one searched for it they all found it through recommended.
During the video you say, "Flatten the curve." I can't help but think that's why you just now showed up when I've been watching corona virus videos. The algorithm listens!
@Paul Freedman That's called confirmation bias. You see random things all the time, and only notice when they are oddly relevant.
You really think delivering videos that people will click on takes this much work? How about the fact that you clicked on his previous videos?
Skynet omg!!!
Meanwhile:
Day 140 of the 14 day lockdown
jimmy rustler but muh flat curves
If a pier is an artificial outcropping over water for people, then it makes sense that a weir is an artificial outcropping over water for water!
how wierd ...
A Pier is a man made structure IN the water to provide calm waters on the leeward side.
@Gord Baker I think you might be confusing pier with mole. At least since we're speaking english. In other languages like german you'd actually be at least partly correct. Weird.
@swapode nope. Moles burrow in the ground eating roots and worms.
Mother of God.....
3:10 "So how we can flatten this curve?"
Flattening curves before it was cool.
ikr, everyone a copycat
YouTube algorithm heard 'flatten the curve ' thought this is relevant in present times and recommended it ,,,,
Very subtle
You really think delivering videos that people will click on takes this much work? How about the fact that you clicked on his previous videos?
@Reason the comment literally meant it's not much work , and I just explained how I came across this video .
@VedVids Yeah okay, if you think transcribing every video to look for current phrases is an easier explanation than the fact that you've clicked on this or similar channel before.
@Reason Im defeated . Pls enjoy the day!
@VedVids lol people sure love to find patterns in noise
YouTube: hey you goin' to sleep?
Me: yes, now shut up
YouTube: What is Weirs
Me: *wakes up*
The piano key Weir looks like a work of art.
Engineering is a sort of art and practical use. So it is actually win - win :)
In engineering if a component does one job, it's good. If it serves two functions (like a normal weir), it's great. If it serves three functions, it's genius (like an artsy weir).
I clicked the video just because of that thumbnail image. So I guess his skill-share course on how to get more clicks works.
Practical Engineering: What is a Weir?
Me: Me
Related to Tom Weir?
Yo same
lmao right
travis weir ahh a fellow man of culture
Hello fellow Weir, Co-worker sent me a link to this video today. Today he learned something I have known about most of my life.
4 million people: engineering is my passion
4.5
I don't give a fuck about engineering video is just interesting
Me: Lets check Youtube for corona plague updates
Youtube: Would you like to know What a Weir is instead?
Me: Okie, looks interesting
2nd that.
Perfect assessment ...
I'm convinced the algorithm heard him say "flatten the curve" and suggested it. I'm here for corona videos too but still watched the whole thing
Me: let's watch YouTube to get away from Corona Virus updates
Some are choosing to numb their minds by watching tiger king... others are using this time by expanding their mind watching channels like this.., or this old Tony, or niels (I thing thatw his name, the young guy who does chemistry) honestly, I've learned more in the last month than in a long time.
Youtube: hey you know what a weir is?
Me: don’t know, don’t care
Youtube: what if practical engineering teaches you?
Me: ... aight
Mom : Son look a mini water fall
Son : Actually, its called Wier
PE: What is a weir?
Me: 80% weird?
Seriously, an interesting and informative item. Thanks.
me: watching this video just to feel smart
also me: really not understanding anything
I will try to put it in layman terms. If you lived on a lake with a river coming in and a river going out. And you wanted to lower the level of that lake no matter the flow rate of the river. You can build a Piano Weir or Wedge Weir on the River going OUT of the lake. It will increase the mouth of the river allowing for more water to flow through thus lowering the level of the lake forever. Okay not forever... as long as the weir did not wear out. LOL.
How does watching a video make you feel smart? The video is telling you information, not the other way around. That you don’t understand the information should make you feel dumb.
Same
He's a guitarist and founding member of Grateful Dead.
Weir everywhere
Jumpercable wireless
lol...
I know his daughter. She’s sweet and pretty darn attractive.
Read this as Guitarist Found Dead
The photo of the Hoover Dam at 4:09 shows a high water level overflowing into the spillway. It must have been taken more than 20 years ago. The water level is so low now that there is about 100 to 150 feet of the intake towers are exposed.
Now you've got me wondering what the flow into the dam is like. I visited recently and the water is significantly lower than the towers or overflow weirs, but there's other places that the water flows out during 'normal' usage, so there would probably need to be significant watershed upstream or perhaps oncoming drought where they want to store that much.
I was there for the last time this happened in the last week of May or first week of June 1999. It was amazing sight and the sound of the water flowing over the gates into the spillway was amazing. The operators were very worried about opening the gates because they had not been tested under stress in decades or ever.......There are bypass flow tubes, but for some reason most of those had been capped off for reasons to which I do not know. This picture is older from the looks of the cars.....maybe sometime in the 80's.
@MrCloudseeker ... the bypass tubes were used during the original construction so they had a dry area to build the dam. The original tubes have not been used since then. Most likely there are more tubes within the dam itself but I have never seen any reference to them. Perhaps they are there to flush silt from the bottom? Who knows?
there's old picture of low water levels too... relax. you know the water doesn't all cross the dam, much of it is sent to las vegas.
That's a nice picture. Imagine how the designers/engineers were sweating it when that thing first filled with water.
YouTube: “You want to hear about weirs?”
Me: alright you got my attention,
The fact that YouTube can predict what videos I want to watch without me having any prior interest or knowledge of the subject is slightly creepy. Awesome video though.
ai is a hellava drug
Dam if you do, dam if you don't. It's weir, I know.
Kris Kringus
Whooooosh. Over your head.
@keir farnum maybe it was not weired enough for him
Wouldn't have been, if it was weired enough. 😏
As a German speaker it hurts to hear the pronunciation
Watevever you say
DO THE MATH EQUATION WITH EXAMPLES.
‘Merica CANNOT “fear” MATH!
3:10 “How do we flatten this curve?” That was a different phrase one year ago.
I'm going to try some of these shapes in my aquarium sumps to improve aeration
i have heard the term “low-head dam” and my city is trying to get them removed because they are dangerous
I'm one who loves viewing dams and structures built to control waterways for our benefit. If I see a sign along the road that says "dam", I immediately turn off and investigate. This information will help me further bore my friends. Thank you for that.
Electron i like to follow them to see how many times it branches off and where it starts/ends and to see how it’s shifted over the years.😊
Damn
Ps1 hagrid
w a t e r
Dam that's a weir hobby
Mileyard Gigahertz ...😂 I see what you did there. 👍
"So how can we flatten this curve?"
Rona: Allow me to introduce myself...
Ah yes, controlled weirs or as I like to say Weir: Automata
Always wondered what they are. They have them on a much smaller scale in waste water treatment plants. I'd be interested to know how it applies specifically in that scenario
When I was a kid we had a damn that would occasionally flood for no apparent reason. They couldn't figure out where all the water was coming from. so they just paid some civil engineer to come and solve the problem. the whole thing was weird.
I refuse to be ashamed
Well, i'll be "damed".
SIRENS BELONG HERE. WET
@GenuineBronxite mitatgate all
@Sigma more on that later.
I did a thing i love ur channel and have been subed since 30k
😑
Me: "what did you just call me?"
Everyone: youtube recommendations are broken
YouTube: hold my weir!
Whenever I think of weirs, I always think of that one episode of Top Gear where they are driving a homemade hovercraft down a river and they go down over a weir, and then while trying to go back up it, they burn out their engine.
Instead of using the "weir" equation, I opted for using the "juicedratic" equation.
In another episode of: Youtube algorithm brought me here
Weir, right?
I swear they're keeping secret some AI that's already surpassed human intelligence and can simulate someones brain.
I dont even know how I got here
This freakin' channel is my new hobby! I have always been curious about the whys and hows pertaining to the flow of water.
Strange indeed. In fact, we got weir'd.
Me: it’s 4am, i need to sleep
Youtube: WEIR
for once YouTube, you've made me feel like you know me. Like you REALLY know me.
Some weirs can write books. I really like The Martian which spilled from Andy Weir.
"Thank you for watching, and lemme know what you think."
...
You know what I think, sir? This is the best channel I'm subscribed to on YouTube. Thank you for your hard work, and for making engineering so interesting. All the best.
“We can’t hang out with you you’re too weir”
2:48 - No way! I know this area. Do you live around here or was this from a random video you found?
"So how do we flatten this curve?"
^ Prophetic words in 2020
I read it as:
"What is a Weiner?"
Weir, ogee, nappe-- so many great scrabble words!
@SupaBwad Hah, I wish you were right. I'd even feel sympathetic. But this is pretty widespread and evidently growing in popularity. In Australia we have an equally grotesque "impediment": every sentence clause ends in a sharply rising tone, equivalent to a question tone, or the intermediate items in a list. But it's placed on every sent^ence, except the very final sentence in a paragr^aph, which takes a descending cad^ence. Then the whole thing rep_eats.
Once you're awake to it, it's intensely irritating. We think it came from New Zealand in the 80s and 90s. It feels like a meme from the movie Idiocracy.
@aboctok i played games with somebody like that, i didn't realize it was the same thing just from outside the US. It's always nice to hear from different people, i try to just be positive lol.
@SupaBwad Well, positive is nice. But the phrase tough love has a basis in reason. If you make a typo, then why should it bother me? On the other hand, if I persistently avoid all disciplined thinking just because I'm more comfortable that way, what right do I have to expect others to extend themselves to protect or promote my interests? And that could be as simple as how diligently they serve me a cup of coffee. 😉
@aboctok i mean i do try to fix the grammar still. Lol.
Yep, this one served me well!
In our vicinity lies one such flat weir ( Prague - type) in disrepair. Severely cavitated by water to extent that hole undermining the stucture, where water drops and whirls has depth over 4 meters now (and increasing). Any slate chunk in that hole under 2 metric tons of weight got shreded to gravel. Same fate would face any unlucky swimmer, who would get sucked by it I guess.
PS.: I can send you picture of the said weir, if interested.
The first Weir I ever saw turned me into a 'Dead Head' ... and although the Greatful Dead is no longer together... Bob Weir is still rocking!
Casey Jones you better watch your speed!
I really couldn't wrap my head around a lot of this. I think the rating curve thing could have used some more illustrative explanation.
But I still love your videos. This one made me feel like I missed something though.
This showed up in my Youtube suggested video feed, nice timing I was having a discussion on water flow over dam spillways last week, as I visited the dam at 2:52 in this video (this "weir" forms a lake of 1859000 Megalitres).
Real Engineering - 2019-02-25
Found this really interesting. The weir in Galway, my hometown, creates a pretty unique cityscape. I have always been fascinated by it, but never really put much thought into it why it existed.
Cian Mac - 2019-02-28
Hey I'm from galway too, used to row just above the weir.
Shin Gojira - 2019-04-08
Cn you do a collaboration
AMULET72 - 2020-02-29
That salmon weir (along with others) on the Corrib in Galway is the reason a lot of south Mayo and north Galway is experiencing serious flooding at the moment.
Arya Manake - 2020-03-13
Real engineering has joined the chat.
😂😂😂
Jack Kenny - 2020-09-18
I thought it existed to make waves for kayakers :)