What We Can Learn from 5 Times Rivers Ran Backward

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Usually, you can count on a river to flow in one direction, but some things can make it reverse course. Aside from being weird and surprising, these river reversals can often reflect geological changes and have long-lasting impacts on the surrounding ecosystems.
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Sources:
Amazon
rgs-ibg.onlinelibrary.wiley.c...
www.sciencedirect.com/science...
www.science.org/content/artic...
Mississippi
www.usgs.gov/natural-hazards/...
www.iris.edu/hq/inclass/anima...
www.nps.gov/locations/lowerms...
Slims
www.nature.com/articles/ngeo2932
earthobservatory.nasa.gov/ima...
Kaituna
jgs.lyellcollection.org/conte...
www.tandfonline.com/doi/abs/1...
www.tandfonline.com/doi/abs/1...
www.otago.ac.nz/geology/resea...
Qiantang
www.sciencedirect.com/science...
agupubs.onlinelibrary.wiley.c...
www.researchgate.net/publicat...
Images:
www.nasa.gov/topics/earth/ear...
www.flickr.com/photos/astro_a...
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earthobservatory.nasa.gov/ima...
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Опубликовано:

20 июн 2024

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Комментарии : 652

@miriam3848 2 года назад

The river Emajõgi, which translates as 'mother river' here in Estonia flows between the two biggest lakes in the country, so, depending on the weather in different parts of Estonia, it can flow either way.

@thomasrech3171 Год назад

Thats so cool!

@Crusader1089 Год назад

Is Em or Ema the word for mother and Jogi the word for river?

@jasonwebb1882 2 года назад

I have seen the Mississippi river run backwards twice now. It is crazy. The water just starts acting weird and getting deeper and deeper.

@jasonwebb1882 2 года назад

Or swollen as most say.

@jasonwebb1882 2 года назад

For those who want to know when. 2005 Hurricane Katrina and this year 2021 Hurricane Ida.

@savannahwoods3222 2 года назад

what part of the Mississippi?

@brandonmarr9080 2 года назад

Then there's that time when a drilling company in a lake accidentally dug into an underwater mine. The lake completely drained into the mine, reversing the river for a while, and destroying houses and boats all along the waterfront in the process, due to the powerful current and weakened foundations. Everything that was too close to the water got pulled into the massive whirlpool and sucked into the flooded mines, while the building around the mineshaft exploded from the back pressure.

@SImrobert2001 2 года назад

Lake Peigneur,. The lake is a satwater lake instead of a freshwater one, because of the water rushing in from Vermillion Bay and the Delcambre Canal.

@lloydevans2900 2 года назад

The lake probably would have ended up somewhat salty anyway, since the mine which was punctured by the drilling was a rock salt mine. When it got flooded, any remaining salt would have been dissolved by the freshwater from the lake, though the sheer amount of water involved would have make a comparatively weak solution.

@spookysquirtle 2 года назад

white girls be like "oopsies haha'

@alexls1923 2 года назад

Fortunately there were no human casualties since everyone in the mine got out when they noticed the water flooding the tunnels, I have heard reports of some unfortunate dogs dying in it though

@pg2826 2 года назад

I heard about that incident long time ago as part of a safety training video.

@icewink7100 2 года назад

How did you not mention tye Tonlé Sap in Cambodia? It changes direction every six months based on the monsoon. During the rainy season it flows from the Mekong River into the Tonlé Sap lake, while during the dry season it flows from the lake back into the Mekong River.

@kanchandara2018 2 года назад

Because cambodia is not white 🙄

@digikaa 2 года назад

dang, that’s so cool!

@exnihilo415 2 года назад

Came here to say this.

@blafoon93 2 года назад

This was one example I immediately expected from the video title.

@eoincampbell1584 2 года назад

@@kanchandara2018 And Qiantang is?

@dereklam1225 2 года назад

I enjoyed the technical depth of this episode a lot! The detailed descriptions, excellent maps and sheer variety of the mechanisms for all these river reversals is awesome and thought-provoking. The "complex fluid dynamics" of the Qiantang river would be the cherry on top. Time to dig into the sources!

@taylrthegreat 2 года назад

Should get that practical engineering channel to go over the fluid dynamics of that

@therockdood 2 года назад

nerd

@hansisbrucker813 2 года назад

I read that as technical debt and had flashbacks 😳

@Swedishiwa 2 года назад

You should watch some older episodes. Used to always be like this

@bpqd2624 2 года назад

youtube made it so we can't see how many dislikes every video has anymore, so please hit the dislike button on every video, all of them even the ones you like and please encourage every one else to do the same. we as a community can drive the algorithm insane if we all do this, so please copy and paste this comment every where, thank you.

@beaker_guy 2 года назад

Fun fact: as someone who has been to New Madrid (and also Cairo, Illinois); the locals tend to pronounce it "New MAD-rid" not "New Muh-DRID". (Also, Cairo is pronounce "Caro" (like the syrup.) :) For the morbidly curious.) But, as Webster's dictionary once said, "There is no such thing as a CORRECT pronunciation, merely pronunciations that are more (or less) common."

@MCAndyT 2 года назад

@chrayez 2 года назад

And one in the area that has consistently bothered me as a Kentuckian- Versailles, KY is pronounced by the locals as Ver-SALES instead of the “proper” French Vers-EYE.

@beaker_guy 2 года назад

@@chrayez Ah heck, Orion, IL is generally pronounced "or-EE-on" (kinda like Oreo) ... it's... "hard to get used to"... but it's their town. shrug

@Aeronor2001 2 года назад

I've noticed many of these towns named after foreign cities have a different pronunciation than expected. It almost seems purposeful. Another example is a small town in Illinois named Athens but has a long 'a' like AY-thens.

@semaj_5022 2 года назад

@@Aeronor2001 maybe it is purposeful in some of them to differentiate their town from the original it's named after? And in others it may just be due to how the local dialect developed. Living in Kentucky myself, I can't see too many of my neighbors here outside the city seeing "Versailles" and both recognizing it as a French spelling and pronouncing it 'correctly.'

@dougbishop6902 2 года назад

One river the reverses twice a day is the reversing fall in St John New Brunswick Canada which I visited. It was amazing

@fehzorz 2 года назад

Putting the Fun in Bay of Fundy

@rydplrs71 2 года назад

I’ve been to reversing falls before.

@Warhawk666 2 года назад

Twice a day in Moncton there is also a tidal bore that rolls in

@FalbertForester 2 года назад

There are reversing falls all around the Bay of Fundy - Maine, New Brunswick, Nova Scotia - all have rivers that run backwards for at least a few hours a day.

@LadyAnuB 2 года назад

When my family went to Nova Scotia when I was 10, we stopped here.

@howie3236 2 года назад

During the 2011 flood, I watched the local tributaries around Missouri Valley, IA flow backwards from the increased volume of the Missouri River. That was amazing.

@angelindenile 2 года назад

It's interesting to me that RU-vid seems to 'pick' events, history, or a phenomenon that I didn't know about and suddenly hear about it from three different channels because of the algorithm or all the channels I follow release it at the same time. This time it was about that Mississippi River earthquake back in 1812, I didn't even know that happened until Deep Dive did an in depth video exploring how terrible earthquakes can be in the mid US.

@zacharyyoumans9614 2 года назад

I watched that same video like 2 days ago lol. It happens to me too

@VintageToiletsRock 2 года назад

Coincidence?

@angelindenile 2 года назад

@@VintageToiletsRock perhaps. I know the algorithm shows stuff related what you've recently seen, but there are times that I believe the entire youtube community works together without telling us lol

@dsklizzle 2 года назад

Watched that video earlier today

@harrietharlow9929 2 года назад

Happened to me over the past day or so as well. But then I'm a major geology freak. Probably the algorithm picked up on it.

@TonksMoriarty 2 года назад

Part of the River Aire flowed backwards when it drained into a coal mine... The site today is now a bird sanctuary just outside Leeds & the River flows in the right direction once again.

@onewondershow2 2 года назад

I was waiting for this one

@pseudotasuki 2 года назад

That happened to a salt mine beneath Lake Peigneur in Louisiana when it was accidentally pierced by an oil drilling rig. This not only drained the lake, but also reversed the direction of the river that connects it to the Gulf of Mexico. A waterfall formed where it drained in to the salt dome, which rapidly recorded as it eroded the lake bed and the river's channel. The formerly fresh water lake is now brackish.

@jeffreybernath6627 2 года назад

A great sequel to this would be, "When Humans Reversed Rivers." Huge engineering projects, like the one that reversed the Chicago River, have also reversed rivers.

@anavaldivia4669 2 года назад

Thanks for posting so often 😊

@sophroniel 2 года назад

I was so hoping you'd include something from New Zealand! Not only did I used to holiday in Kaituna as a kid, but my dad literally got the funding for that project you mentioned!! We have the highest concentration of braided river networks in the world (due to the concentration of greywake I think?) and, as someone who lives on the canterbury plains (aka most recent victim of massive, christchurch-destroying earthquakes...) the whole artisian wells vs rivers vs glacial recedings etc is of great interest. My dad works for the national institute of water and atmospheric research and he lives and breathes this stuff! The Kaikoura eq in 2016 also set an undersea river flowing differently too, I believe, and has had a massive effect on ecology there if memory serves

@cherylreid2964 Год назад

Hullo from another Kiwi in Hamilton.

@juliaconnell Год назад

& kia ora from Auckland 🙃

@mikedowd6015 2 года назад

The Mississippi could have been mentioned twice, since it only flows south now due to isostatic rebound instead of into the Great Lakes like it did before the northern edge of the continent started rising due to the lack of glaciers.

@Gamepro2112 2 года назад

While New Madrid was named after the Spanish capital, us Missourians don’t know how to pronounce anything so it’s actually pronounced New MADrid here.

@terryenglish7132 2 года назад

...same here in DE, Houston is pronounced house ton

@Gamepro2112 2 года назад

@@terryenglish7132 oh wow, I’ve never heard of that one. We also have a Houston here but pronounced like the Texan one

@troyclayton 2 года назад

New Hampshire has Berlin and Milan, which became pronounced Burl'-in and My'-lan during WW2. New Madrid was largely populated by Americans when the land was obtained by the US, and they might have changed the pronunciation on purpose. Or it happened later. I wonder.

@soaringvulture 2 года назад

@@terryenglish7132 As is Houston Street in New York City. I didn't know there was a Houston in Delaware.

@MCAndyT 2 года назад

@SnarkNSass 2 года назад

Being from Central Arkansas and having also lived in NW Tennessee, I've heard about the New Madrid fault my whole life. The stories of when the "Mighty Mississip" ran backwards and the crazy ground explosions are terrifying. Especially when the red alert for the fault to shift again went out 20+ yrs ago. I have actually felt 3 earthquakes in central Arkansas... Supposed to be because of frakking.🤷🏻‍♀️

@adellutri 2 года назад

These five instances are very interesting. But we should not only look at "natural" river reversals, but also a artificial ones. Like the Chicago River, which naturally should flow into the lake, but through engineering flows south to St. Louis.

@terryenglish7132 2 года назад

Interesting video here on YT about that.

@devinnall2284 2 года назад

Or that that one time when a hole was accidentally drilled into the salt mine below Lake Peigneur turning the whole lake to turn into a massive whirlpool and drain in 3 hours causing sea water to flow up the nearby river and refill the lake

@adellutri 2 года назад

@@devinnall2284 Oh my! Hadn't heard about that one.

@route2070 2 года назад

Yes that happened and is impressive, but I think an earthquake, probably involving New Madrid again, gave the engineers an idea.

@1224chrisng 2 года назад

@Marchail P. Jones no, that's the fish taser canal a few streets south, the Chicago river was diverted in the 1800s so that shipping can travel all year

@rmdodsonbills 2 года назад

Just a small pronunciation note: I believe that the people in Southeastern Missoura pronounce the town of New Madrid with the emphasis on the first syllable of Madrid so that it rhymes better with "bad bid" better than it does "undid." And for the record Prague, OK rhymes with "beg" not "dog," Pierre, SD rhymes with "leer" not "the air" and Lead, SD rhymes with "reed" not "red."

@valiroime 2 года назад

Potato, potahto. Regional differences.

@rmdodsonbills 2 года назад

@@valiroime I'm not saying it's a make-or-break deal, I'm saying if you go to Montana and ask directions to Meeesowlay, people are going to look at you funny. The good people of South Dakota will be able to point you to their state capital even if you pronounce it wrong, but they're going to talk about you behind your back and laugh.

@anthonyappleyard5688 2 года назад

Once3 there was a severe drought in England, and the Thames was so low, that to get enough water for London, the waterworks had to pump out the whole flow of the Thames, and the water from two suburban tributaries called the Mole and the Hogsmill flowed westwards (i.e. backwards) up the Thames to the pumping place.

@diegop2311 2 года назад

The Russian River in northern California shifted from south to west with a earthquake trapping salmon in the Santa Rosa lagoon and those salmon are different than the other species then ones in the river

@toneenorman2135 2 года назад

When did that happen with the Russian River? Thank you. I’ve been there many times and never heard that 🤷‍♀️

@LadyAnuB 2 года назад

This actually makes sense if you follow the Laguna de Santa Rosa down to its start point which isn't too far from the start point of the Petaluma River. Do you have any information on the earthquake that did this?

@Larixlaricina 2 года назад

I lived for a bit in Hangzhou near the Qiantang river, and I often walked along the riverwalk. I missed the tidal bore every time, so it was cool to see it here!

@ancientswordrage 2 года назад

I'm really glad this isn't a compilation... I never know how much of that I've already seen, where as this (/seems that this) is new

@angelapotter8084 2 года назад

One time when I was living in Limerick, Ireland it was so windy that the river Shanon began running the opposite way. The majority of the water was still flowing the normal direction, but the top part of the water was flowing backwards.

@sirapple589 2 года назад

One time when I was living in Limerick, the wind did Shannon a little trick. Though much did stay the top flowed the wrong way. And gave the poor fish a mighty kick.

@johnscanlon2598 2 года назад

Lol I just drove to Limerick today

@Ish4MyIggans 2 года назад

Horseshoe bend. Still on my bucket list with the crater.

@rubberduck3y6 2 года назад

The River Severn in the UK also has a tidal bore, thanks to the funnel shape of the Bristol Channel between England and Wales.

@origional_name_here1429 2 года назад

The river Avon is also extremely tidal and changes daily. Also thanks for talking about the UK most of the talk is from America

@ygazgge1356 2 года назад

I was expecting the Chicago River to make an appearance, but that was a man made case.

@katheymann2334 2 года назад

Several years ago, I was spending an afternoon by the Potomac River in Alexandria, VA, during high tide. All of a sudden, the river started flowing quickly in the reverse direction. In all my years, I had never seen such a quick flow reversal. It was quite chilling to observe.

@MerkhVision 2 года назад

Ayy, shout-out to Alexandria, my hometown!

@davidmicheletti6292 2 года назад

I’m sure there are many rivers that have changed direction of flow. Another example is the Rainy River that forms part of the border between Canada and Minnesota USA. For thousands of years the water flowed east and the Bigfork River that flowed into it had it water diverted from east to west at the same time. Again the direction of the intersection of the two river clearly shows a shift in direction. The cause of this happened at the end of the last ice age when water stopped flowing east to the Atlantic. With the glaciers gone the water was able to move west and then north into the arctic. One more example is the Great Lakes and in particular Lake Superior. On the eastern end of this lake it was totally blocked by massive glacier . In turn this caused the lake to raise by 400 feet which in turn forced the discharge to flow down the Mississippi River system into the Gulf of Mexico. Interestedly after thousands of years when this glacier impasse melted and gave way a massive wall of water flowed rapidly out along the present day great lakes flow age and into the Atlantic. What happened next was very amazing. With all this fresh water entering the ocean the actual concentration of salt in the water went down. As a result the evaporation rate of water in the ocean shifted just a little bit. But it shifted enough to trigger another ice age. That ice age was the last ice age to hit North America. A counter theory is this water flowing into the Atlantic could have caused the Gulf Stream to shutdown and this was the trigger for the last ice age. I’m not a geologist just someone who enjoys the history of our blue marble. So I could have the misinterpreted some of the effects and timing.

@pjschmid2251 2 года назад

Oh my, New Madrid is not pronounced like the city in Spain it’s pronounced MAD-rid because…the Midwest. We loved to name places after exotic foreign destinations and then butcher the pronunciation it’s just what we do. Cairo Illinois pronounced KAY-roe and Milan Illinois pronounced MY-lin. Just two more examples but you get the gist.

@mppaar 2 года назад

Thank you, I came here to say this. If anything, he could ask his brother.

@kzisnbkosplay3346 2 года назад

I live in Madrid, NM, which is also, generally pronounced MAD-rid. But we have some debates about this, because complicated history.... My family says MAD-rid because the guy owned the town said it that way. But at it turns out, the guys who actually mined for the coal, said it like the city it Spain, but with the Hispanic style rolling 'r'. I just learned this last week that New Madrid is also pronounced the way we say it. So funny to read this right after I heard that somewhere else!

@patpierce4854 2 года назад

Thanks for commenting what I was gonna say, complete with the same examples!

@hattybug6p 2 года назад

as an illinoisian, can confirm

@coltonalbright7544 2 года назад

There's an Athens KY that's pronounced Ay-thens. And a Versailles that's pronounced Ver-sails.

@JMThought 2 года назад

This is probably my fav scishow video. Fascinating.

@livijean1 2 года назад

How long has this outfit been sitting in Hank’s closet waiting to come back in style? Love it 🙌🏻

@brittanyzph 2 года назад

An excellent video! Thanks!

@glenngriffon8032 2 года назад

Backwards running isn't nearly as concerning as rivers running UPhill

@lordfuckface8015 2 года назад

Refreshing. This makes me thirsty

@richbountyhunter6821 2 года назад

Cool video Always nice to see y’all upload

@portablecity 2 года назад

I really appreciate how the geological phenomena are connected to lived experience on the ground - this stuff is so interesting, thank you! I first read about this phenomenon related to glacial retreat in the great lakes region 10K years ago in canada and I've been curious about it ever since.

@PhroXenGold 2 года назад

Suprised you didn't cover the Tonle Sap river in Cambodia which switches flow direction roughly every 6 months

@douglasbarnes2109 2 года назад

Or the San Joaquin river in California, which used to south until it filled the marshland around Tulare, before it started flowing north to the San Francisco bay.

@BeedrillYanyan 2 года назад

Same with the Pasig river in Manila. But the video is already over 10mins.

@AdaCrowley 2 года назад

I live by the Fraser river, which had a glacial lake dam break about a 11,000 years ago which reversed its course from north to south. You can still see the scars from that event on lidar scans in Lyndon and Fort Langley. We have recently here in BC suffered a ton of weather related disasters connected with extreme weather events. In fact here in southwestern BC the past year is a perfect example of ancient geological history contrasted with climate change. My hometown on the Fraser and Nooksack floodplains suffered 1 in 200 years flooding that has severely damaged infrastructure throughout the province. This is less than 6 months after a record breaking heat dome killed over 500 people this summer due to the record breaking heat and humidity. As northern regions warm we are seeing very extreme weather events that validate very intense and extreme models for climate change. Speaking as a geology/archaeology nerd and a professional historian it's an excellent case study for so many things. The northwest coast speaks to an increasingly ancient human past in the Americas and the immense geological transformations of glaciation and anthropogenic climate change. Not to mention the history of settler colonialism and etc. I could write a a thesis about it all if I had the time and money. A case study of this region would make an awesome video (and would be a great way to discuss how Indigenous knowledge is deep and often transcends climate science and has revolutionized western understandings of ecology). If you want sources hit me up.

@EmilyJelassi 2 года назад

Very interesting video.. love this channel!!

@jc6218 2 года назад

I love your show. Mad props to the SciShow crew. I wish I had this stuff when I was growing up.

@ilovetotri23 2 года назад

Super cool video! I clicked on this link thinking you would highlight the rivers that flow backwards on a permanent basis for various reasons. Regardless, awesome video! Thanks.

@punditgi 2 года назад

Fascinating video!

@michellemcelreath7429 2 года назад

Super interesting! New Brunswick Canada also holds both phenomena: tidal bores (on the Peticodiac River in Moncton), and reversing falls (on the St. John River in St. John).

@flaviusfake271 2 года назад

The Bay of Fundy has tidal bores all the time even reversing falls.

@Dogbreath42 2 года назад

twice daily all year

@Pdogg614 2 года назад

I was about to type this and saw your comment i am in Saint John where the reversing falls is. Was curious if he was going to mention it lol

@luisgutierrez8047 2 года назад

Spoopy! Literally just watched a video that deep dive made recently, which talks about new Madrid's earthquake and how it makes the river flow back.

@ButterBallTheOpossum 2 года назад

I witnessed I stream flow backwards near Lake Erie. I was fishing in a stream that after about 3 miles eventually entered Lake Erie. A huge storm happened on the lake and the extra water and wind caused the little stream to flow backwards. It was real bizarre

@savannahwoods3222 2 года назад

Im from Tennessee and Im always surprised at how little people know about Reelfoot! thank you for keeping us all educated 🤗

@savannahwoods3222 2 года назад

howdy neighbor!

@bliz3 2 года назад

This is soo interesting! :D

@colinmunro3158 2 года назад

Here I thought they would use the classic example of the Bay of Fundy to explain rivers changing course with the tide. I am pleased to see theat they used a more novel example.

@abroyd5794 2 года назад

We have a similar tidal bore in France, and many people actualy surf it! It is called the "mascaret" and forms in the Gironde near Bordeaux.

@amethystoak9984 2 года назад

5:06 I’m from the Reelfoot Lake area and I have never clicked on a SciShow video so fast as I did when I read this title. Anyone from the area grew up with stories about the Mississippi flowing backwards because of a great earthquake and forming Reelfoot Lake.

@Articulate99 2 года назад

Always interesting.

@haperawehiwehi8661 2 года назад

Another famous river in NZ, the Waikato river, also switched course relatively recently. After the Oruanui eruption of Taupo in 26,000 BCE, Ignimbrite (welded tuff) ash and other pyroclastic material in-filled the original channel and diverted it so that instead of flowing north- eastward into the firth of thames, it now flows north-westward into the Tasman at Port Waikato.

@soaringvulture 2 года назад

Looks more like south-westward to me.

@haperawehiwehi8661 2 года назад

@@soaringvulture how? it flows from taupo in the south, to port waikato in the north west.... the waikato is like the nile; it flows from south to north rather than the traditional north to south.

@soaringvulture 2 года назад

@@haperawehiwehi8661 You're right. Most of the river flows north as you say. But the part that changed course now flows west southwest into Port Waikato. Just looking at a different part of the river.

@TorreFernand 2 года назад

I remember the Slims river in the news. Experts were saying "oh it'll probably start flowing northward any day, nothing to worry about"

@florinadrian5174 2 года назад

2:50 No, the Andes don't capture water from the Pacific. The prevailing winds are blow towards west so most of the water captured by the mountains comes from the Atlantic. Of course, we're talking about the latitudes of the Amazon. If you go south enough, the prevailing winds change and so does the wet side of the mountains.

@BlankBrain 2 года назад

Each of the Missoula floods caused the Willamette River to flow backwards for a couple of weeks. There are erratic rocks on the foothills deposited by these flows.

@PeloquinDavid 2 года назад

As others have already noted, there are lots of places just upriver from the Bay of Fundy (between the Canadian Maritime provinces of Nova Scotia and New Brunswick) that see tidal bores pretty much twice a day every day. The Bay of Fundy is so funnel-shaped that it features the world's biggest tides, so it’s hardly surprising that the various rivers and creeks emptying into it all feature some sort of tidal bore on a daily basis.

@liseturner1019 Год назад

There's a small stretch of river and lake on the West side of the Island of Montreal where the St Lawrence and Ottawa Rivers first meet briefly before flowing either side of the island to combine at the Eastern side. IIRC It usually flows South to North as the St Lawrence spills over a bit. However, in extreme snow melts, it can flow North to South since the Ottawa River is just suddenly so much more swollen with meltwater. This is not a good sign as it usually means a lot of flooding that Spring.

@dynamosaurusimperious2718 2 года назад

Epic sci show video

@bikegofast 2 года назад

Just noting that the Kaskawulsh glacier and Slims River are fully in Yukon, Canada, not Alaska as was stated. Spectacular hiking in that area and beautiful to visit. Fun and informative video as always!

@bellumpraeparet 2 года назад

3:38 If anyone is interested in learning more about the New Madrid quake, an excellent channel called Deep Dive uploaded "Why Earthquakes in the East are so much more Dangerous". 9:08 Thanks to one of the world's largest tidal ranges, England's River Severn also sports a bore --- complete with surfers riding the wave upstream.

@mack3d.net_ 2 года назад

Great video. I was hoping to see lake peigneur 1980 disaster in the list but maybe thats another episode. :)

@davidford3115 2 года назад

Your river "piracy" example occurred with the Wabash River in Indiana. At one time before the Laurentide Ice sheet covered the area, it flowed north. During the glacial period, the glaciers created a damn and ancient Lake Maumee, which then eventually flowed into the St. Lawrence River. As the ice sheet retreated, a new channel opened up and the Wabash change directions and began flowing south into the Mississippi River.

@flibbertygibbet 2 года назад

My great great great Grandfather John Lafferty lived on Lafferty Creek in Arkansas. According to a letter my mom has, he saw Lafferty Creek flowing backwards during the time of the New Madrid earthquake and the quake opened up a "bottomless" chasm that took a long time for the water to fill.

@sudika 2 года назад

For "river piracy" or stream capture there is a longer lasting example, which is still visi(ta)ble: the Danube Sinkhole (Donauversickerung) near Immendingen, Germany, where most of the year Danube's water is completely sucked underground, then appears in a tributary of the Rhine to the south. In the last couple million years Danube has lost hundreds of miles of it's length this way to the Rhone and the Rhine in present day Switzerland and Germany.

@EzMoneyy 2 года назад

Weird! I was reading Jules Verne Mysterious Island in the bathroom 5 min ago and I read that the engineer in the story can tell if the river they are following is close to the ocean because the high tide affects the way the river flows. then i get on my computer (yes, i washed my hands) and this video was recommended... wtf GOOGLE.

@harrietharlow9929 2 года назад

I love Jules Verne. I learned a lot from reading his novel. They also initiated a lifelong interest in geology and the deep sea.

@willshumway1627 2 года назад

The bore tide in turnigan arm in Alaska, while it occuring in the ocean, is pretty cool too, lost of parasailers out there when it happens

@michellem3050 2 года назад

I was so sure the Fraser River would make your list! It's an oddly shaped river, with strange hooked layout and tributary angles wrong for flow to the Pacific. These, plus other geological evidence, supports the idea that it flowed eastward long ago - Pleistocene, I think.

@woodchuck306 2 года назад

The south flowing Sacramento River reverses flow when the American River pushes it back north 5 kilo-meters to the Yolo Bypass when we get enough rain.

@caad5258 2 года назад

very cool

@CampbellMC90 2 года назад

I live on the Bay of Fundy and grew up watching the Tidal Bore, we have the largest (tied with china) one in the world and it is always so mesmerizing to watch.

@suboyi 2 года назад

The fraser river in canada flowed backwards in ancient time, as evidenced by the drainage pattern seen in tributaries (and a whole bunch of other evidence)

@chloepeifly 2 года назад

almost every society in ancient history has water creation myths, the fact that water doing weird things happens relatively frequently in the past few centuries, when we’re only just starting to be able to understand it, just makes me think about all of the countless times the ground shook beneath people’s feet and then their river, that their society was built upon, started flowing backwards, or that some times during the year, 4 meter high walls of water hit the shores of the estuary you live by. not understanding fluid dynamics or deep time or climate cycles, of course you would think that your god was angry. it’s all just so fascinating

@Ali-zn6sg 2 года назад

The Mississippi River runs backwards in New Orleans every time there's a hurricane

@lostsoulsthc7137 2 года назад

Cool hearing about NZ here happen to live in a town with a tidal river far enough upstream the water level changes but the salinity doesn't

@eliscerebralrecyclingbin7812 Год назад

Cool thanks

@kronik907 2 года назад

I live in Anchorage Alaska, and we have a regular boar tide at Turnagain Arm. Tourists love to come and surf it, even though the water rarely gets warmer than 40F. You can surf the thing for miles if you do it right. More of a Bore Tide for those of us who see it regularly.

@alecmcgrathofcanada9175 2 года назад

I was hoping you'd mention the Reversing Falls in Saint John, New Brunswick, Canada. You should make a video on that.

@fivespeed3026 2 года назад

I went crappie fishing in Reelfoot lake as a child. It was really cool.

@drblitzzz 2 года назад

Correction for #3: The Kaskawulsh Glacier is in the Yukon Territory in Canada (You said it was in Alaska). Thanks for mentioning it though! I hiked in this area in 2015, and skied/hiked there again in 2016; it was really wild to see the once mighty Sims River turn into a trickle!

@HC1Box1955 2 года назад

They don’t pronounce it like Madrid, Spain, it’s an “a” like in “hat”, New Mad Rid.

@FourTwenT 2 года назад

Madrid

@altosack 2 года назад

That’s too bad; it’d be nice if more people were cognizant of (and respected) their history and culture. (I’m a Missourian and have heard more mispronunciations, including this one, than I hope you can imagine.) Edit: Upon reading this, I realized it’s unclear: when I say “mispronunciations”, I mean the local yokels, not the speaker in this video.

@OpaSpielt 2 года назад

When people get Rid of Mad ...

@bethypeffy 2 года назад

Also, the stress is on the first syllable, not the second. I knew it was going to be wrong, but I was still hopeful considering how much research they do in these episodes.

@harrietharlow9929 2 года назад

@@altosack When I. Lived in Texas I used to get corrected all the time for using a more Spanish pronunciation for various place names.

@Monli1 2 года назад

I am from Russia. Sometimes I don't understand any english word, but this chanel help me to learn english. Thank you for what you are boing!)

@Flugmorph 2 года назад

curious to see this video appear only a few days after the amazing channel Deep Dive talked in detail about the New Madrid earthquakes...

@pseudobardic 2 года назад

Check out tidal bores in Nova Scotia. Pretty nutty stuff! And riding them in a raft is a blast

@rnedlo9909 2 года назад

In Pennsylvania on Eagle Mountain there is a riverbed up the side of the mountain where the Susquehanna River once flowed.

@amigo1040 2 года назад

The river called Krupa in my village (small river that runs to Neretva) also changes course aswell, couple of times a day

@peterream6508 2 года назад

You should do an episode on Tidal Bore! I want to know about those complicated fluid dynamics and all the places it occurs.

@LadyEzri 2 года назад

The summer I visited the Slims River visiting the Yukon, it was shocking. Dry river bed, but you can see where they used to have places to that they could tie off boats a few years ago. Even drove through that dust storm. Just shocking.

@RelaxMode1 2 года назад

This really seems mysterious

@dannymac6368 2 года назад

The New Madrid seismic event reversed the course of the Mississippi for a short time period, an absolutely stunning volume of water. Check out Deep Dive’s recent upload if you love wonderfully produced documentary-like content. 🤯😍

@dannymac6368 2 года назад

Link to Deep Dive’s look into why earthquakes East of the Rockies have the potential to be so much more deadly than those on the West coast: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-Kn2KFC8cX-g.html

@justsomerandomguy8210 2 года назад

Apparently around 30 years ago (might be a bit more or a bit less) a river changed direction because of a big earthquake. But I might be mistaken

@harrietharlow9929 2 года назад

The New Madrid quakes were the cause of the Mississippi running backwards as Hank mentioned.

@butters4596 2 года назад

Pine Creek at Ansonia, Pennsylvania used to turn north and flow down the Tioga to the East. During the ice age, the glacier pushed into the area blocking the water flow, creating a lake over 600 feet deep and made multiple lakes until it broke through the mountains to the south and carved out The Grand Canyon of Pa. I wonder if there are historical records somewhere of one or more major floods downstream as each of the lakes broke through the mountains.

@avatar997 2 года назад

Re: Sims River/Kaskawulsh River situation. That area has been mixing drainages since the Ice Age as the ice sheets retreat and advance. This is probably not the first time these rivers have swapped water, so there is an ancestral drainage area. The down side of this is that the Alaska Highway crosses Slims River at the south end of Kluane Lake and now there is just a dusty mud flat where the river used to flow.

@troyblueearth7450 2 года назад

Wow what a theme for a video

@JosephFuller 2 года назад

The Tonle Sap river in Cambodia changes direction every year. In the rainy season, it flows north to fill the Tonle Sap lake, then in the dry season it flows south into the Mekong.

@allister5643 2 года назад

Ah, yes, 68 Olympic swimming pools, I’m glad we clarified the volume.

@footshotstube 2 года назад

mate of mine surfed the Severn Bore [ itwas very busy that yr] How did you miss the mighty river severn lol thannks as ever

@bertmung 2 года назад

Don't forget the Chicago River. A canal was dug to reverse the flow from north into Lake Michigan to south draining into the Illinois river and eventually the Missippi.

@lisafish1449 2 года назад

I used to live in Troy, NY about 250 miles up the Hudson River. This is still in the tidal estuary, and the river reversed itself every day at high tide.