If you're someone who just randomly clicked and is not familiar with weirs/lowhead dams, what is happening is the water falling over the dam is rolling upwards over itself and back towards the dam. This creates a trap where you can't swim away. The water bubbling up is called the Boil Line. Everything after that point continues on downstream and everything between the dam and Boil Line just recirculates back towards the dam and gets pushed under again in a vicious cycle that can last for days. The water is usually quite deep below most of these dams and even if it was 5 feet deep (unlikely), you wouldn't be able to stand up against the current. The strongest of swimmers wouldn't be able to escape this. A solution would be to make the dam stepped or add large boulders underneath (much cheaper) so that the current can't recirculate into a boil line.
i am wondering if the person dives under the water by a few feet it will take them out of the swirl and allow them to swim downstream a few feet underwater and then to come back up a few feet downstream and then continue to flow with the stream?
Ive been in one of these , with footballs, plastic bottles,gas bottle and bits of trees, From what appeared like a small easy to run waterfall at the beginning of a day out, it certainly was not. the second the front of my kayak touched down into the lower water it pulled straight back into the fall, rolling me out of the boat , the paddle was torn out of my hand with the greatest force of current i have ever felt, and i was sucked toward the fall , my boat and paddle joining the footballs ,rolling in the recircluating current, I kicked off the wall of the fall as it drawn me toward it , going under water ,kicking off the bottom as bubbling water erupted around me like volcanos (boils) luckily for me and probably what saved me was my friend following on a sit on top surf kayak, i grabbed onto the SURF kayak after he shot the fall ,and he was screaming in panic as it drew us toward the fall, i reassured him he was ok as i was the one in the water! 😮 with him paddling full power and me kicking behind we made it 4-5 metres out from the fall , the concrete floor grazing the boat at about 30cm depth! As we stood in almost ankle depth water looking back into it , the boat and paddle just endlessly rolling ,the bottles, trees, gas bottle, footballs the 4m high vertical concrete walls made it a hell hole 🕳 , we fished the boat n paddle out with a rope and hook and carried on the day boating all though pretty shook up, not until i got back and did research i realised we'd been in a low head dam , basically water purification , aeration waterfall , the signs are just not there to warn people. I make sure to explain this to everyone i take near water. Just be safe people , Its not the size of the fall but whats happening beneath it ❤
Depends on the type of hydraulic jump occurring. Please look up for example the videos by practical engineer on RUclips on the subject. Not all, but some, weirs are deadly.
Anyone who thinks that is dangerous is outright lying to you. That is literally the best place to swim & if you ever come across one DO NOT MISS OUT 😊😊😊
If you're someone who just randomly clicked and is not familiar with weirs/lowhead dams, what is happening is the water falling over the dam is rolling upwards over itself and back towards the dam. This creates a trap where you can't swim away. The water bubbling up is called the Boil Line. Everything after that point continues on downstream and everything between the dam and Boil Line just recirculates back towards the dam and gets pushed under again in a vicious cycle that can last for days. The water is usually quite deep below most of these dams and even if it was 5 feet deep (unlikely), you wouldn't be able to stand up against the current. The strongest of swimmers wouldn't be able to escape this. A solution would be to make the dam stepped or add large boulders underneath (much cheaper) so that the current can't recirculate into a boil line.
Or you can swim sideways to the edge but that's not in most people's instinct
@@erdemir5641 not really
or when they do, it's too late
i am wondering if the person dives under the water by a few feet it will take them out of the swirl and allow them to swim downstream a few feet underwater and then to come back up a few feet downstream and then continue to flow with the stream?
@@manp1039good luck fighting all the currents while properly orienting yourself with 0 vision all while holding your breath underwater in a maelstrom
Ive been in one of these , with footballs, plastic bottles,gas bottle and bits of trees,
From what appeared like a small easy to run waterfall at the beginning of a day out, it certainly was not.
the second the front of my kayak touched down into the lower water it pulled straight back into the fall, rolling me out of the boat , the paddle was torn out of my hand with the greatest force of current i have ever felt, and i was sucked toward the fall , my boat and paddle joining the footballs ,rolling in the recircluating current,
I kicked off the wall of the fall as it drawn me toward it , going under water ,kicking off the bottom as bubbling water erupted around me like volcanos (boils) luckily for me and probably what saved me was my friend following on a sit on top surf kayak, i grabbed onto the SURF kayak after he shot the fall ,and he was screaming in panic as it drew us toward the fall, i reassured him he was ok as i was the one in the water! 😮 with him paddling full power and me kicking behind we made it 4-5 metres out from the fall , the concrete floor grazing the boat at about 30cm depth! As we stood in almost ankle depth water looking back into it , the boat and paddle just endlessly rolling ,the bottles, trees, gas bottle, footballs the 4m high vertical concrete walls made it a hell hole 🕳 , we fished the boat n paddle out with a rope and hook and carried on the day boating all though pretty shook up, not until i got back and did research i realised we'd been in a low head dam , basically water purification , aeration waterfall , the signs are just not there to warn people. I make sure to explain this to everyone i take near water.
Just be safe people , Its not the size of the fall but whats happening beneath it ❤
This is what happened to a group of paddle boarders recently and shows the reason they couldn't escape
Depends on the type of hydraulic jump occurring. Please look up for example the videos by practical engineer on RUclips on the subject. Not all, but some, weirs are deadly.
Yep, and considering just how buoyant a ball is compared to a human, you just don't want to go there!
damn....
no its a weir are you stupid
So how do I get it out. Also me
That's the thing you dont
That's weird
Weir-d
Anyone going over that would be dammed.
Anyone who thinks that is dangerous is outright lying to you. That is literally the best place to swim & if you ever come across one DO NOT MISS OUT 😊😊😊
Nah you're one devious mf
Sure if the current is low but this situation is straight up deadly. The boil line is extremely far away indicating a stupidly strong circulation.