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Tokyo's Underground Discharge Channel

en.wikipedia.org

21–30 of 45 posts

Re: Tokyo's Underground Discharge Channel

#21
> 78 10 MW (13,000 hp) pumps that can pump up to 200 tons of water into the Edo River per second.[4]

Wow, I hope the grid can handle the relatively sudden appearance of 780 MW of load. I assume they have some protocol in which why turn on one pump at a time and coordinate with the grid operators.

Re: Tokyo's Underground Discharge Channel

#22
post #21

> 78 10 MW (13,000 hp) pumps that can pump up to 200 tons of water into the Edo River per second.[4] Wow, I hope the grid can handle the relatively sudden appearance of 780 MW of load. I assume they have some protocol in which why turn on one pump at a time and coordinate with the grid operators.

[deleted]

Re: Tokyo's Underground Discharge Channel

#23
post #21

> 78 10 MW (13,000 hp) pumps that can pump up to 200 tons of water into the Edo River per second.[4] Wow, I hope the grid can handle the relatively sudden appearance of 780 MW of load. I assume they have some protocol in which why turn on one pump at a time and coordinate with the grid operators.

I'm a bit worried that systems like this make the continued existence of large cities dependent on the availability of power and the resilience of power grids. It all works well enough usually, but when things go wrong, systems like that can make a bad situation a lot worse.

Re: Tokyo's Underground Discharge Channel

#24
post #14

Earlier quoted context omitted.

Dresden was also completely destroyed by Allies (for no good reason) and its firebombing caused between 200 000 and 300 000 victims (largely women, children and elderly). We don't talk about it much even though it was a crime against humanity as well. https://en.wikipedia.org/wiki/Bombing_of_Dresden_in_World_Wa...

From the Wikipedia article supplied: “Large variations in the claimed death toll have fuelled the controversy. In March 1945, the German government ordered its press to publish a falsified casualty figure of 200,000 for the Dresden raids, and death toll estimates as high as 500,000 have been given.[15][16][17] The city authorities at the time estimated up to 25,000 victims, a figure that subsequent investigations sup…

A single death is a tragedy, a million deaths is a statistic. - Stalin

Regardless of the deaths, I understand the cultural tragedy of the destruction of Dresden is significant as it was an important intellectual center.

I had a friend who passed away recently who was a boy in the bombings and recounted with tears on multiple occasions, as a lifelong opiate addict, how he felt he had personally died at that time. I visited the city a few years ago and found the largely depressing husk of a city still under wishful reconstruction. The nominal activity of its touristic center was at direct odds to the clearly economically depressed suburbs mere moments away.

Re: Tokyo's Underground Discharge Channel

#25
post #15

These enormous underground projects are so interesting. I've been following the Chicago Deep Tunnel project, which is nearing completion after half a century of work.[1] Because Chicago was built on swampland and next to the lake, rainwater used to be a huge problem because it didn't have anywhere to go when it rains, except into sewers - which used to be well under capacity for burst rainfall, which led to basement…

Massive side not - I have no idea why you guys insist on using football stadiums and football fields as a unit of measurement, what gives?

Re: Tokyo's Underground Discharge Channel

#26
post #15

These enormous underground projects are so interesting. I've been following the Chicago Deep Tunnel project, which is nearing completion after half a century of work.[1] Because Chicago was built on swampland and next to the lake, rainwater used to be a huge problem because it didn't have anywhere to go when it rains, except into sewers - which used to be well under capacity for burst rainfall, which led to basement…

Just yesterday, a street downtown buckled from the pressure of stormwater running underneath it.

1. https://wgntv.com/2019/05/01/video-captures-street-buckle-in...

Re: Tokyo's Underground Discharge Channel

#27
post #15

These enormous underground projects are so interesting. I've been following the Chicago Deep Tunnel project, which is nearing completion after half a century of work.[1] Because Chicago was built on swampland and next to the lake, rainwater used to be a huge problem because it didn't have anywhere to go when it rains, except into sewers - which used to be well under capacity for burst rainfall, which led to basement…

Massive side not - I have no idea why you guys insist on using football stadiums and football fields as a unit of measurement, what gives?

Just a handy visualization - easier to conceptualize than "12.9 billion gallons."

Re: Tokyo's Underground Discharge Channel

#29
post #14

Earlier quoted context omitted.

Dresden was also completely destroyed by Allies (for no good reason) and its firebombing caused between 200 000 and 300 000 victims (largely women, children and elderly). We don't talk about it much even though it was a crime against humanity as well. https://en.wikipedia.org/wiki/Bombing_of_Dresden_in_World_Wa...

From the Wikipedia article supplied: “Large variations in the claimed death toll have fuelled the controversy. In March 1945, the German government ordered its press to publish a falsified casualty figure of 200,000 for the Dresden raids, and death toll estimates as high as 500,000 have been given.[15][16][17] The city authorities at the time estimated up to 25,000 victims, a figure that subsequent investigations sup…

Thanks for citing the statistics.

Just to be clear and provide context, the numbers the original poster linked were overbloated and inaccurate because it's a fictionalized neonazi talking point, like holocaust denial and white genocide in south africa. Some people get drawn into the, uh, wrong sources and start parroting the talking points without really knowing what they are helping to propagate, so the poster here might not be a racial supremacist or whatever, but it's something to keep an eye out for.

Re: Tokyo's Underground Discharge Channel

#30
post #15

These enormous underground projects are so interesting. I've been following the Chicago Deep Tunnel project, which is nearing completion after half a century of work.[1] Because Chicago was built on swampland and next to the lake, rainwater used to be a huge problem because it didn't have anywhere to go when it rains, except into sewers - which used to be well under capacity for burst rainfall, which led to basement…

>twelve football stadiums stacked together

I understand that football stadium play area is standard, but how do you measure height? Is it a foul to kick the ball too high in the air? The play area, I assume isn't limited vertically.

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