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The Giant Underground Tunnels Protecting Tokyo From Floods

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 Environmental   |   Geology   |   Science   |   Technology
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Description

If you believe the hype, then the Metropolitan Area Underground Discharge Channel stops Tokyo flooding. It doesn't. But it is one colossal part of a huge network of flood defences that protect a city that would otherwise be... well, very wet.

MORE ABOUT THE DISCHARGE CHANNEL:

The Discharge Channel's site (in Japanese): http://www.ktr.mlit.go.jp/edogawa/gaikaku/

Advice for English-speaking visitors:
https://matcha-jp.com/en/4002

REFERENCES:

"Below sea level" and "aging levees": http://www.kensetsu.metro.tokyo.jp/content/000028631.pdf [PDF, parts translated in https://www.nytimes.com/2017/10/06/climate/tokyo-floods.html ]
"All that protects the two and a half million people": https://mainichi.jp/english/articles/20180823/p2a/00m/0na/007000c
Discharge channel stats: http://www.japanriver.or.jp/EnglishDocument/DB/file/004%20Kanto%2079(T.O-12).pdf [PDF]


THANKS TO:
Local fixer: Yamada Masato
Post translator: Dominic Jacobs

Edited by Michelle Martin (@mrsmmartin)

I'm at http://tomscott.com
on Twitter at http://twitter.com/tomscott
on Facebook at http://facebook.com/tomscott
and on Instagram as tomscottgo

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