How Flood Tunnels Work

[@PracticalEngineeringChannel]

🥑 Simplify your dinners with code PRACTICAL16 at bit.ly/3Ws1PYm 📚 Did you know I wrote a book? There are still some signed copies left at store.practical.engineering/

[@Peter_Enis]

The tunnels can also be a great source of energy to provide a city with its electricity needs?

[@mikek9297]

Nice timing on this one

[@JithinJose2]

Hi, another nice video again, but just for understanding, why not increase the depth of the river instead of building tunnel?

[@owenselkirk3950]

Question why not just put a filter on the end so when the sludge comes out it gets filtered? prob a bad idea but if anyone can answer that would be awesome :)

[@billsauer3164]

​@@Peter_Enishuh? 😂

[@assortedsubscriptions4012]

I love this channel because it legit tells me about these cool civil engineering systems and areas if study I had no idea actually existed...

[@FLAIR__]

one of the best out there, easy to digest info too.

[@bradleybatt1401]

likewise

[@SECONDQUEST]

Yeah there needs to be more outreach education about civil engineering. Too many people just think water go in the ground and disappears

[@EvanMoon]

Legit

[@d00mf00d]

Straight sus bruh

[@Taladar2003]

I think one important consideration that isn't modelled in your model is that the bottom of building basements and subway tunnels is significantly below the point where river banks overflow so even just a few centimeters above the bank can fill up whole basements.

[@WyvernYT]

That's a valid point, but fortunately it's one we all know; it would be awkward to build model basements.

[@CptJistuce]

Basements aren't particularly common in Texas, so it's an easy oversight. Between the wide swaths of open land and a frost line very close to the surface, there's little reason to dig down very far. And while I don't know about his area, mine has very clay-rich soil that expands and contracts a LOT with rain. This makes basements actively undesirable, as the expanding and contracting soil places immense crushing stress on underground structures before pulling away far enough to remove support.

[@RobinTheBot]

​@@CptJistuce they can be built to handle it if you're willing to pay extra, and they end up better able to resist foundation damage than standard houses... No one pays extra when they're a developer though.

[@conorstewart2214]

@@CptJistuce in his last video he talks about the concrete in his garage cracking due to the clay rich soil.

[@lightfeather9953]

​​@@RobinTheBot would you rather they spend their investment on unnecessary basements or on more living space? They're not just magically pocketing extra profits by not building basements. Would you if you were building your own house?

[@Z4G.]

Grady, these vids are the reason you are in a league of your own. No one is able to explain in such detail from experience and have the handy-ness to build something to visualize what you are talking about. Top notch effort my man, you deserve all the success.

[@Didnt_ask69]

Cringe

[@Kynk]

​@@Didnt_ask69 I read both comments and the only cringe I got was from you. That's pretty embarrassing for you.

[@Didnt_ask69]

@@Kynk didn’t ask

[@Kynk]

@@Didnt_ask69 why would I do something you asked? Why would anyone do anything you asked? That's awfully bold of you to assume that people care what you think.

[@MarsTheX]

@@Didnt_ask69 nobody asked if you didn’t ask (if you reply to this nobody asked)

[@RealEngineering]

I was at a concert in waterloo park last week and was wondering this exact thing

[@johnfrian]

This is the only channel that can make a 15 minute video about an underground tube, and keep me captivated from start to end.

[@shanebusch8102]

I am a mechanical engineer and I hated my civil engineering courses in college but man do I love these videos. Keep up the great work Grady 😁

[@giangtran-to6tb]

ok

[@Slava_Ukraini1991]

you know what they say, mechanical engineers build the weapons and civil engineers build the targets.

[@rockys7726]

@@Slava_Ukraini1991 that's the only thing I remember during my ME education. lol

[@misterg1157]

Did anyone else do a 180? I thought “Boring!” when he said (at 1:30): “As I always say, the only thing cooler than a huge tunnel is a huge tunnel that carries lots of water and protects us from floods” (yawn!), only to switch to “This is so cooool!” when he then showed his acrylic model.

[@speeddaemon6557]

They had to build something similar to the Tokyo system here in Dallas when they rebuilt hwy 75 during the 90s. The highway got moved from the surface down into a huge concrete canyon that can collect rainwater faster than any feasible storm drainage system could handle. There are massive underground caverns 100ft below Uptown to store it until it can be safely released into the storm drainage system (Cole Park Storm Water Detention Vault). It's so well hidden that basically no one knows it exists.

[@LillianCrawfishDE]

I'd love to see an episode on this! What do you think, Grady?

[@anathardayaldar]

Sounds like a great place to film a movie chase scene.

[@DavidHalko]

I would love to see a KZbin clip in this!

[@radarksu]

@@DavidHalko kzbin.info/www/bejne/e2WcdXePjdSVbZo

[@jasonalbert6251]

I love the name. “Storm Water Detention Vault”. You are being detained on suspicion of attempting to flood Dallas. The court finds you guilty and sentences you to confinement in the SWDV.

[@brianjgraf]

This is awesome. My dad was the District Engineer for the Corps of Engineers when San Antonio was building their tunnel. It was awesome to get lowered by a crane in a man cage down the bore and see the TBM. Very cool stuff. Thanks for the memories!

[@kennethkowalchuk7868]

Interesting, thanks. I have driven through the Kuala Lumpur SMART tunnel in Malaysia which is a multi-use tunnel allowing water and traffic movement and I believe has proven to be of great value since its commissioning.

[@user-op8fg3ny3j]

Same!

[@irvalfirestar6265]

Same here, but as a passenger. Truly a marvelous piece of engineering to be able to fit road traffic within a flood tunnel and having the road still be serviceable through multiple mode 4 activations 16 years on.

[@TheByard]

I worked as Senior Inspector of Works on the Smart tunnel project. The idea of a dual use tunnel came from a bidding contractor who won the build contract. To enable escape stairways were mined by hand methods outside the TBM driven tunnel lined with concrete section rings. Two road decks installed carries traffic in both directions and the invert of the tunnel carries light rain storm water.

[@Charles37400]

I dont know why but ive always liked water drainage systems. Most kinds of engineering are cool, but theirs something special about structures that control water. It always just reminds me of when i was 5 in my gravel driveway, digging channels from one flooded pothole to the next and watching it flow, then trying to see how many rocks i needed to plug the stream or make it take a route i wanted. If i had acrylic models like yours when i was 5, I'd probably be studying civil engineering rather than history right now lol.

[@talkingdot]

Tokyo's underground thing is SO AMAZING if you ever take a trip to Japan you have to do a video on it because it is amazing

[@lateoclock4281]

The sparkly water in the demo is so cool and pretty! It makes it easy to see the flow and turbulence too. Thanks for the video :)

[@stephan5279]

As a person who lives in Vienna, I suggest you have a look how we figured out to manage floods from the danube river... ;)

[@AR_Wald]

❤insel

[@davidfalterman8713]

I know learning about infrastructure is the point, and it’s still mainly why I enjoy this channel, but I also have to say, I love the glimpses we’ve gotten of your family growing in the Hello Fresh ad segments over the years too. What a lovely little household you have, Grady!

[@revenevan11]

I was thinking that at the end of this video, too!

[@Crunch_dGH]

Hmm. I’ve tried Hello Fresh & other similar “solutions” & found the burden of non-recyclable shipping & packaging to be nothing short of disgustingly obscene. How does he reconcile that fact with his presumed forward looking & sustainable perspective?

[@hansisbrucker813]

Thank you for mentioning the metric units too. It really helps 😊👍

[@iteerrex8166]

All of science is metric, the whole world is metric, but we’re stuck in this old British system. I know it costs a lot to convert, but we gotta start sooner or later.

[@Merennulli]

​@@iteerrex8166 We have started. It's not a bandaid to be ripped off, it's structures and infrastructure to be replaced and people to be convinced. More and more infrastructure is quietly being replaced in forms like manufacturers using metric tooling and gauges and instruments used by the public having both units. But while it's easy to dictate an office change to metric, it's not easy to convince people that conversion is better for them because it very obviously isn't. They aren't meaningfully impacted by it, and they don't meaningfully impact others by using customary units. The people who do, like all companies contracting with NASA for example, have converted because they had a clear benefit to it. For the average person, it's a high cost for someone else's ego over unit superiority. Once most tools and products are in metric, public conversion will come naturally because it will be useful to them. And as for the road signs, that conversion won't need to be made by humans. Driverless cars may still be decades away from taking over, but they are inevitable, and they won't get mixed up reading metric and driving 70mph in a 70kph zone.

[@iteerrex8166]

@@Merennulli I know most if not all the reasons and problems, I just would like us to get there.

[@Merennulli]

@@iteerrex8166 I quite understand that feeling. I doubt I will live long enough to be on human driver free roads in a metric US, but I at least know there is a world coming where the world is fully metric and our descendants can argue about important things like which ball is a "football". :)

[@iteerrex8166]

@@Merennulli oh don’t even get me started on football lol

[@DanPeacock]

I trained as an Electrical Engineer (focusing on computers) but I am ALWAYS interested in how stuff works. I come at these with an eye to find some nugget of knowledge and I am never disappointed.

[@Peter_S_]

Another EE here with focus on embedded hardware who thinks this channel is gold.

[@someonerandom704]

CEG here checking in

[@rutgerw.]

If only Electrical Engineers were as smart as Civil Engineers, our delicate circuits wouldn’t get fried every time there is a surge😜

[@Peter_S_]

@@rutgerw. You have no idea.....

[@rutgerw.]

@@Peter_S_ I don’t, but a varistor might do the trick?

[@joshua-kramer]

I had no idea flood tunnels existed. I knew about storm drains and tunnels, but even living in Kansas City, Missouri - which is notorious for flooding - I had never learned about flood tunnels! Thanks so much! I've learned so much from your channel, and now that I understand their functionalities, I really appreciate the infrastructure in my city so much more.

[@AnonyMous-jf4lc]

Big tunnels are a simple but very expensive solution to a rare problem. There are smarter ways to accomplish this. KCWater is a pioneer in this. Lookup KC smart sewer.

[@Life_of_Matthew]

I appreciate you making a stormwater-related video. So many people think that stormwater goes into stormwater drains and then simply vanishes, but it is actually dealt with, with water infrastructure.

[@radagastwiz]

Note that flood diversion can be done in two dimensions as well - see the Red River Floodway that diverts stormwater around the city of Winnipeg, Manitoba. It's essentially a large ditch that loops around the city to the east; if the river (flowing into the city from the south) overflows, the floodway takes the excess and returns it to the riverbed well north of the city where it can safely drain to Lake Winnipeg.

[@seanjones21]

I live near the Chicago tunnel project reservoir and it's a huge source of pride for many Chicagolanders. We can't wait to see the completed project in another decade or so. My grandparents and parents generation started it, and now we'll put the final touches on it. It's like Chicago's very own heritage project for everyone to marvel at. And well worth the cost. It's already keeping basements and sewers from backing up during extreme rain events. Come visit and maybe they'll give you a tour if it's dry enough!

[@josiahcox7313]

Top quality content as always! I really love the discussion of real world examples coupled with your home-made example creations! If anyone out there is wondering, Grady's book is similarly awesome!

[@gus473]

Agreed! The grandkids love looking at pictures to "see what Daddy does" at work and to find "Little Engineer" hidden in the illustrations! 😎✌️

[@Crunch_dGH]

I’ve tried Hello Fresh & other similar “solutions” & found the burden of non-recyclable shipping & packaging to be nothing short of disgustingly obscene. How does he reconcile that fact with his presumed forward looking & sustainable perspective?

[@giangtran-to6tb]

ok

[@Tiger351]

This is really interesting to see, many years ago I accompanied a group of high school students learning about local flood mitigation projects around Maitland NSW Australia (some which were completed and some which were planned or still under construction). Maitland still floods somewhat during extreme rain events but nowhere near as much as the infamous flood event of 1955 which was the catalyst for nearly 70 years of flood mitigation projects since then.

[@tarasaurus98]

Glad to see you mention the Chicago Deep Tunnel project! One of the biggest and craziest water management projects ever undertaken

[@mrcraftiest]

Walking trails are so eye-catching and spectacular. 26-feet in diameter tunnel mention at the beginning is mind boggling

[@MinecraftTestSquad]

I didn't expect a top-down view of a place I've actually walked around. Waterloo park is somewhere I visited while in Austin for university. It's quite nice! It was constructed rather recently (if I recall correctly, there's more to be added). Whoever designed it did so rather intelligently. The plant species there are native to Texas and are picked to support insect- and birdlife well throughout the entire year.

[@DoubleDTVx2]

Haha, I live just north of Austin and had no idea such an infrastructure project was developed! I might have to make a visit soon to see it myself, with deeper appreciation for it since having watched this video 😉

[@NahrAlma]

I just love these cool well thought out solutions to problems. I find it even more fascinating that people live on top of those structures every day without even knowing about them. Stuff like this gives me back a little bit of hope in humanity every time. I mean, not nearly enough to look hopeful into the future of course, but still.

[@tehlaser]

Ok, that mica powder was an inspired addition to your garage model. Really helps make it visible what’s going away from the surface.

[@mattedge8359]

I gigantic supersewer tunnel is being built under London at the moment called Tideway. It’s to help handle storm water and prevent the sewers overflowing into the river Thames.

[@Maj.warden]

Since you talked about this, can you talk about the red river flow-way in Winnipeg? "duffs ditch". It's been described as a modern marvel of engineering and is basically just a big ditch to prevent flooding. Fargo in ND are working on something similar now.

[@tasdasd3856]

As an Civil Engineer and someone from Winnipeg, the flood way is a "marvel" only due to it's scale IMO. It quite literally is a big ditch around the city and there is little novel innovations that I am aware of that were developed for it. A fun side note, the reason the Red River floods so much is that the river flows South to North, so the southern part melts before the northern end causing massive ice dams that back the river up. They often use explosives and floating excavators to try and keep the ice broken up and moving.

[@Serahpin]

@@tasdasd3856 K.I.S.S.

[@heidirabenau511]

​@@Serahpin I see that you are mentioning the KISS train family built by Stadler, I think it's a great train!

[@rodchallis8031]

@@tasdasd3856 In fairness to Chef Coin, since the creation of "Metrolinx" in Ontario, any project that is a)Finished and b)Works constitutes an "Engineering Marvel" these days in Canada. ;)

[@xavierhulbert5849]

The Deep Tunnel project was recently completed in Milwaukee (in 2016?). I haven’t been in the tunnel but I have spoken to some of the engineers who have, and the photos they show are insane. Part of it is a 21’ diameter tunnel, 2 miles long, and 300’ underground. The entire system is more than just this section and can hold 521 million gallons of water in total. I just wanted to give a scale as to how big some of these diversion tunnels can get. They’re impressive structures.

[@kennethjosephson134]

I have been living in Las Vegas since 1985, a metropolitan area with its own amazing network of flood control tunnels and basins, but I am a Milwaukee native. I remember when the Deep Tunnel Project was begun. I grew up on the Northwest Side, where numerous creeks were placed in tunnels during the Twentieth Century and some were interconnected with both storm drains and basement drains. Urban sprawl north and west of my old neighborhood led to increased runoff, adding to the flow of Lincoln Creek , the Menomonee River and their various tributaries, both above ground and in tunnels. As you know, a lot of re-engineering was necessary to control flooding. I heard Red Star Yeast near 27th and I-94 was a casualty of the Deep Tunnel Project. Apparently their private well was contaminated by the tunnel project and their having to use city water made their business unprofitable.

[@brentsnocomgaming7813]

I lived in Austin during the memorial day flood in 2015, thankfully not downtown. It was insane how much that city flooded, and I was shocked as I had assumed it was too hilly and too close to the Colorado river to possibly flood like that. Good to know they build a tunnel so it (hopefully) doesn't happen again, along with them dredging the hell out of Shoal creek which is now like 15 feet below street level, and the canyon they built is as wide as it could possibly be (up to 100 feet wide in the lower areas). They also built a nice hike and bike trail along the creek in the artificial canyon, and planted as much stuff as possible. It was a fantastic place to walk the dog when I lived in downtown Austin.

[@riotintheair]

Fun seeing a civil engineering project from my home town highlighted. I saw dozens of shows in Waterloo park as a teenager and young person in Austin and didn't ever really know about this project. Even knowing some thing about the Edwards Aquifer and how the fresh water system in and around Austin works I didn't know about the flood tunnels. Mostly it was things I learned as a volunteer water quality monitor for the Colorado river - a whole team of volunteers monitor it throughout the watershed doing tests weekly or every other week (monitoring for disolved O2, nitrates, phosphates, and fecal coliform, in addition to pH and how much suspended sediments were in the river).

[@phytonso9877]

As a minor note, Chicago's Tunnel and Reservoir Plan has been "done" for a while, but since the quarries they plan to use as the Reservoirs have remained active longer than was expected the final completion date has fluctuated between 2020 and 2040, depending on the economy and how much money the owners of the quarries are making.

[@ulysseslee9541]

In Hong Kong, we don't have big river, but we have lots of population area under the mountains and we have more than 2000mm of rain fall every year. So the Drainage Services Department(DSD) do 3 storm water tunnels at the hillside in Hong Kong Island and North Kowloon, to collect storm water from the upstream of the hill's drainage system and outfall at a safety place, reduce the current system overload at the downtown area. DSD also build some underground storm water storage "Pools" to store the storm water at the urban area, such as Happy Valley Underground Stormwater Storage in Hong Kong Island and Tai Han Tung Stormwater Storage in Kowloon, stormwater will be pump out or storage for cleaning & recreation venue irrigation use.

[@EthanNeal]

This kind of tunnel system would've been very helpful for my town a couple weeks ago. Idaho Falls, Idaho got hit with a pretty nasty thunderstorm that dropped 2 inches of rain on downtown in 30 minutes, and most of the western half of town east of the Snake River flooded pretty badly.

[@giangtran-to6tb]

ok

[@joemason2587]

Yes!!! Liked straight away as it's the first ever KZbin video I've seen that suggests some Americans know that metric exists! Thank you ❤

[@kruelangel]

Have a look at Malaysia's SMART tunnel. It's an excellent example of a multi-use flood tunnel. Really awesome!

[@g00rb4u]

I was just looking for this - en.wikipedia.org/wiki/SMART_Tunnel

[@paanjang16]

Really should mentioned about the SMART tunnel. Can use the tunnel as a roadway for light vehicles during dry times and as a flood tunnel during a downpour.

[@Ronald-Butler]

I trained as an Electrical Engineer (focusing on computers) but I am ALWAYS interested in how stuff works. I come at these with an eye to find some nugget of knowledge and I am never disappointed.

[@botje420]

Hi Grady. Putting a piece of wet papertowel or a wet cleaningcloth will keep your cuttingboard from slipping, making the overall cutting much safer and easier. 😊

[@Trashbag-Sounds]

„You saw the title of this video...“ no. I did not. I am literally just clicking everything you upload 😂😅

[@itnickle7551]

This should be favored

[@annamyob]

Thank you for reminding us that there are engineers throughout the world working hard to keep us safe and make sure infrastructure benefits all. Things I've learned on your channel have helped me understand the Nova Kakhovka dam situation. Thank you for being a reassuring balance to that sad, bad news. Humans do have capacity for cruelty and destruction, but also for rebuilding, for innovation, creation, beauty and nurture. May the latter ever triumph!

[@danielhale1]

I used to laugh at civil engineering projects that always just seemed like wastes of money for city vanity projects or overbuilt solutions. Thanks to this channel, now I get to marvel at the incredible engineering that goes into elegantly solving serious problems!

[@incy55]

So, I thought i would mention that I do like the content very much. Your knowledge and delivery are great. Then there are you models. I understood the whole tunnel thing even though i never knew the existed before. then you whip out a model. Your models are awesome. Thanks for sharing your love for what you do.

[@fredflintstone8048]

I worked at a facility that had a hazardous waste treatment plant that was essentially a big distillery. There are several one million gallon tanks in the tank farm and they rest in a very large steel containment basin.. During monsoons the large catch basin will collect a lot of rain water which tends to be collected back into the tanks to be processed which is expensive, so they do a lot of testing to make sure the water that's caught from the rains is safe, and then pumps it out onto the desert floor.

[@johnmaurer3097]

Another fascinating video about something I've always wondered about. Thank you for putting this together and explaining

[@CyclingSteve]

I saw a video by a Dutch company recently who make rain water storage and discharge systems. It consists of crates wrapped in a water permeable membrane that can carry enough weight for car parks, small buildings and roads. They calculate the absorption of the soil and match that with the membrane so water can seep through and percolate to aquifers topping them up. The level is monitored and if heavy rain is forecast the "tank" is emptied into the sewers before the rain comes. The idea is for these to be installed under developments to handle all rain water and local run-off. With enough of these a city could manage floods while topping up ground water and avoiding sewers being overwhelmed.

[@chris_is_here_oh_no]

Excellent video, perfect example of the flood tunnel process. Very informative!

[@lsauce45]

Kubuntu!

[@tjthrash0143]

I live in Texas and have never heard about these structures before Grady talked about them. Very cool.

[@makarevych]

Watching this as my house in Ukirane is being flooded. Nice timing

[@deltaray3]

Sorry to hear about that, actually one of the first things I thought about when I heard that news was "Maybe Grady will include this in a video" and here we are.

[@MarcABrown-tt1fp]

I think the most underrated thing about this channel is the timeless background music. Brings back memories.

[@pdpotman420]

I have lived in Austin my whole life and never knew about this. I like the little model of 111 Congress, its my favorite building in the skyline.

[@gus473]

Yep, but where's Willie? Can it be Austin without Willie? 🤠✌️😎

[@Hoch134]

I've never studied anything connected to physics, engineering or else. But this channel is simply awesome. Your style is very refreshing and you always make sure everybody can understand your explanations by building those great models. Thank you very much.

[@Andy-rj7ij]

Fantastic video! I would love a more detailed video of the concept of sponge cities.

[@LukaNewton-h8u]

Thank you for mentioning the metric units too. It really helps . Thank you for mentioning the metric units too. It really helps .

[@Nareimooncatt]

Thanks for mentioning the TARP project in Chicago. I drive over the Thornton reservoir sometimes on I-294 and always wondered what it was. From the interstate, it looks like you are just straddling a regular rock quarry, and I thought that's all it was. Being in a semi, I get a little higher vantage point, and it's always a bit of a trip (no pun intended) crossing it. I'll have to read up more on it now that I know what it is, especially since the product I haul is a chemical used in wastewater treatment (though not for those specific facilities).

[@sammyday3341]

Your work keeps this older Texas civil engineer interested and informed! Thank you!

[@Galnar]

well this is strangely timely

[@StarMaster470]

Yep

[@bag2963]

How?

[@robertjarman3703]

@@bag2963 It seems like the Russian military blew up a dam in Ukraine.

[@bag2963]

Soooo interesting, I want to implement these types of flood tunnels into my cities so many cities don't have that.

[@Pe4ivo]

​@@bag2963 Muscovites destroyed Nova Kakhovka dam this morning. There is a flood now. Timely.

[@aespa690]

I live in the Tokyo region and immediately thought about writing a comment about the Tokyo tunnel project while watching this, then you even mentioned it! You can tour there and see it its huge in person as they need to protect the largest metro area in the world as typhoons and heavy rain is not uncommon

[@covishen]

Excellent content. I'm curious if you could do some episodes on NYC and their flood protection measures since Sandy. What they are doing about the city sinking under the weight of all the skyscrapers?

[@rothn2]

I've moved now but I remember sitting there one day with a book! I climbed somewhere that I probably wasn't supposed to be and started looking at the stuff they had built. I spent quite some time trying to figure out what that might be doing because it didn't seem like it was _only_ decorative. I had wandered over from a nearby park. Good memories :). Though I ultimately left Austin for what I feel are good reasons.

[@Pe4ivo]

Nice timing bro... And a nice video of course!

[@1257mp]

BABY!! New Practical Enginering dropped!

[@Kre8-1duH]

Grady you are magical brother, I love watching your videos and I've never given much of a fleeting thought to civil engineering projects and structures beyond list style comparisons/records/failures... But you've made it as interesting to me as any other science and I look forward to nourishing my brain with every upload. I'll rewatch your videos routinely and always wish there were a month's worth of non stop streaming. 😊

[@mrcraftiest]

Well before the advent of such engineering miracles, it all seemed so impossible to implement such projects. But ideas coalescing, forming a whole new idea make things possible and probable

[@KQVTownTheme]

Interesting timing given what Russia did to the Kakhovka Hydroelectric Power Plant this morning.

[@matusfekete6503]

Thanks for another informative video. Already looking forward to see your take on special draining operation in Nova Kakhovka..

[@bigtxbullion]

Houston needs the bayou tunnels more than anything! Great video! Never knew about the system in Austin. This is such a good explanation and visual representation 👌🙏

[@artboymoy]

I drive past that Chicago reservoir every now and then and thought it some kinda quarry until I actually looked into it. It's an incredible engineering project.

[@DderwenWyllt]

I live in a really rural area and we suffer a lot of floods, the town is built around a river but not on the flood plain, the issue is as all these big brand stores have moved into the town KFC etc. they decided to build their stores on the only unused land in the town, the floodplains. This has caused havoc since they keep demanding the local government protect them from the floods, to put it into context, these floods have happened every year for the last 2,000 years since my town was founded. There have been big floods before now that have caused damage, but these were rare events, but the floods are reaching the town now since the floodplains are being paved over for car parks, we do have a dam upstream, but unfortunately it isn't owned by our country and its main purpose is to collect and pipe water to a city in England, so it's always at maximum capacity and has to dump that water down stream when it overfills. It really annoys me that people don't plan ahead when it comes to flooding, we already know how to prevent excessive damage cause by them, but then we go ahead and pave over flood plains and build supermarkets on them, it's like 2,000 years of people being sensible enough to not build their homes on the floodplains gets thrown out the window the moment KFC and McDonald's turns up with bags of cash and fast food menu's.

[@HansLasser]

Sadly everywhere in the world, councils give building permits where nothing should be built. But it is usually electorally useful. Looks at what we created!

[@richardmcgrath7959]

Good job sir. I appreciate videos like this because the majority of the public has no idea what civil engineers do.

[@huftheswagindragn]

If there's ever a follow-up, take a look at Frederick, MD's flood management system; it's an interesting historical read.

[@davidandrewcope]

See also, Cumberland, MD just up the road from there.

[@mrcraftiest]

Sweet. To reduce impact of future downpours Houston city is looking into the viability of using tunnels after record-breaking flood in some American areas

[@OldOneTooth]

Ryan McBeth from the Ryan McBeth Channel is looking for a collab with someone with knowledge of dams and hydrology

[@Bare_Essence]

Events like flooding and structures like this seem so simple and are often taken for granted. Then I watch a video like this. Thanks for sharing. Live, learn, improve, do.

[@chriswoodend2036]

Timing is everything. I get the feeling this is going to get A LOT of traffic.

[@mikek9297]

Yeah.. the views will be flooding in so to speak

[@salt-emoji]

I wish more people appreciate how much thought, time, effort, blood, swear, tears, engineering, and adaptations lie mere meters under our feet at any given moment.

[@first_last01]

Hey Grady in my opinion the mic mix could benefit from being run through a De-Esser or a narrow EQ cut around 9-10khz. The S's and C's are quite sharp

[@jkbecker]

Hi I'm Eric and this is Practical Sound Engineering 😅

[@tradingliveG]

I just can't stop watching your videos once I found, you are an absolute gem, providing such information for free.

[@TheRocky3211]

10:40 "must be treated " ... or like we do here in the UK , just discharge untreated sewage and rain water into our rivers and surrounding ocean . Thanks to privatised water companies , as well as a government that lets them get away with it. Meanwhile everyone is paying said companies for water supply and treatment of waste

[@BWilliamG]

San Antonio actually has a few of these systems in place across the city. There is the River Walk system that protects downtown and a new system that was built in the last few years on the west side between Lackland and Kelly Field down Military Dr. When I lived in downtown SA on the River Walk after several months of walking it every night with my dogs I heard about the history of its beginning and the flood tunnel that was added in the 80’s. Was mind blown to think about all of the systems that are in place that are multipurpose for everyday use, specifically the lock system along the River Walk, which I thought was just for the river barges at the time but in fact was part of the entire flood mitigation system for downtown.

[@AFNacapella]

I really really hope well implemented flood management, and surface- and groundwater stuff will get more focus in Cities Skylines 2.

[@Debbiebabe69]

You will be praying for a biblical flood to hit your house and put out the fire caused by the game, as it will be so graphically demanding it will make your GPU burn so fiercely and brightly a normal extinguisher will not be powerful enough to put it out...

[@AFNacapella]

@@Debbiebabe69 jokes on you, it's my central heating. and oven and glass forge

[@hinakomalin]

Just sharing. Thought you might be interested in Malaysia’s SMART tunnel project. A flood tunnel that doubles as a city expressway when it’s dry, and when half-used. But when fully utilised, it closes the expressway portion and turned it into a temporary reservoir and tunnel to channel upriver flow down to another part of the city, to divert waters from major parts of the city. Although it has not prevented certain floods in the city of KL, it has actually prevented the most major ones that had happened in the past that as one consequent actually moved an arts theatre to a dedicated location in the present day. The SMART tunnel is still worth mentioning, as it’s so far the only one that most would be aware of that sees a flood tunnel doubles as an expressway under the city. Thought it might be an interesting piece of information, for those unaware of its existence.

[@INCOUNTER335]

Grady, thanks you for your amazing work. Today in 2 am local time Russian forces exploded The New Kakhovka dam in sothern Ukraine. It would be very interesting to see you cover of this topic from engineer point of view.

[@notsocreative]

The one in Tokyo is amazing. It also has many gates to prevent water coming in from the sea with pumps spitting out the flood waters. And gigantic structures where even the holes for the water to get down to the tunnel are designed to accompany the fall (at some point it's so high that the weight of the water would damage the bottom of the structure so they have this spiral/screw design to accompany the water down).

[@jsimsgt96]

You are the kind of educator that makes a difference!

[@KyleDB150]

I hope Kherson has some...

[@skenzyme81]

Nice. Dallas is currently getting it's first major flood tunnel as well. The Mill Creek Drainage Relief Tunnel project started in 2018 and should be finished in 2025. It's huge. The tunnel will be 5 miles in length and be 30 to 35 feet diameter, running 100 to 150 feet underground. The intake is on the north side of downtown Dallas and the outfall is to the southeast at White Rock Creek.

[@PavloPravdiukov]

Man. The timings of your videos... There's a huge flood in Ukraine's south part after russia blew up a dam. I remember you made a video about blackouts right after we had one in Kyiv. It was quite interesting to learn what our power grid was lacking.

[@Unmannedperson]

3:50: While constructing a bypass through a downtown is economically infeasible due to all the high land values, if you think larger you can bypass the entire downtown (not just through it). This is what Sacramento did with the Yolo Bypass: construct/designate a flood plain on the outskirts of the City that the Sacramento River is diverted into during peak flows. This past winter (one of the wettest in recent memory), the Bypass looked more like a lake with several feet of standing water. But this was better than the alternative - overtopped levies and flooded urban areas (downtown and environs).

[@BrotherSkodidi]

What effect would permeable pavement have on flood waters, Grady? I know that Singapore's been looking into them because of how ultra-urban it is.

[@biohazardlnfS]

Would increase drainage depending on the grade. If water collects naturally under the cement. It will cause flooding by seepage, and pooling in the cement😊

[@bocahdongo7769]

He already explained it. In short it just act like water tank and simple drainage. And ofc it only goes as good as water tank and simple drainage can be.

[@optical_ideas]

I appreciate your effort you put into all these models in your garage. I like that they put a little waterfall on that station

[@FemboyEngineer]

The largest system like this I designed was about 10 metres wide, 3m tall and 1.5km in length utilising rcc, this must’ve been a massive feat.

[@loganleroy8622]

Okay so that's 33ft x 10ft and a little less than a mile long. Very cool.

[@themonsterbaby]

My city (Ft. Wayne, IN) has a huge tunnel project they have been doing for a while that is meant to prevent wastewater from entering our rivers like they do now. It would be awesome to see a channel like this break it down in layman's terms. Since our local news has did a terrible job of actually explaining the project, and it's a massive job.

[@Lessinath]

I look forward to an eventual video on the dam breach in Ukraine because I think it'd be a good way to make a video about how sometimes it's human's fault that our infrastructure fails in a very direct way, although I don't know if it would be *possible* to do both honestly and in your neutral style.

[@Dustmadeout]

No need to be neutral when someone talks about crimes.

[@Lessinath]

@@Dustmadeout I, personally, 100% agree with you.

[@bolehtahan]

The SMART Tunnel in Kuala Lumpur is a huge, probably one of a kind, mixed use road/flood tunnel. Used as a bi-directional dual lane road tunnel to ease congestion on the city's arterials, but when needed, it can be evacuated and used as a stormwater management tunnel. Takes about 30-60min, and then back to a road tunnel. Has been very useful for flash flooding during the rainy season.

[@marichka-mulligan]

You scare me. First your electrical grid series during the mass Ukrainian blackouts after the russian infrastructure shelling, and now a flood video after the destruction of dam in Nova Kakhovka.

[@dionh70]

I feel a need to say that these videos require weeks of preparation and production before they are uploaded to the Internet. Any correlation between this channel's videos and real world events is all after the event occurs.

[@marichka-mulligan]

@@dionh70 I understand this, and my comment wasn't meant to be an accusation of any kind, but just a note on the unfortunate coincidences.

[@notsonominal]

Every time you put out a new video with models, I wonder which one of us had more fun...

[@That-Guy-79]

Ive never commented on a sponsor before but I have used and will continue to use Hello Fresh. I like the fact all the ingredients are portioned for the meal. Sometimes I shop and its the little things that you forget or that add to the cost of 1 meal. I love that I dont need anything but the basics, Like salt or pepper or cooking oil.

[@godtermand]

I work in a utility company which is constructing flood tunnels. The tunnels will serve as a buffer leading the water into reservoirs, parks or open fields. The capacity is calcutated to be big enough to carry one flood/heavy rainfall. After the cloudburst is over the water is pumped back into the normal system at a manageable rate and treated at the wastewater plant.