One of the engineering wonders of the world
Tokyo Flood Prevention | Insane underground tunnel system in Japan!

In NYC during Super Storm Sandy, there were 9 inches of water in the street where the MetaBronx and The Glass Files building is located. I was in the building that night so i know for certain that the flooding came from the sewers, not from the sea. It was the sewers that were overflowing because in the majority of New York City, storm drains are not separate from sewer tunnels.

In Tokyo, Japan, they are way beyond this type of amateurish flood water management. Japan being essentially a bunch of volcanos forming a group of islands with the eastern coasts directly open to the almighty Pacific Ocean, in addition to bearing the torrential rains of typhoons coming from south east Asia, the country runs a very high risk of flooding that can totally destroy entire towns.

So the Japanese built the extraordinary Metropolitan Area Outer Underground Discharge Channel. It's as if you decided to build an underground river in New York City, except it's way harder.

The 59 pillars of these gargantuan tunnels are 5 stories deep. They weigh 500 tons each, which is more than the weight of a full Boeing 747-8 Jumbo Jet taking off.

The similarities with the size and power of Jumbo Jets don't end there, because the pumps that move the flood water around are powered by turbines that are made by modifying jet aircraft engines in order to move 200 tons of water per second.

The system is breathtaking in very way, and i plan to visit it one day - i'll make sure it's a dry day.

Enjoy the video!


For more info:
Kasukabe, Saitama, near Tokyo, Japan
built between 1992 and 2006
ABC Science - @ABCcatalyst
published on October 28, 2014
This item is shared by Philip M Shearer with the Community and the World.
Created on 2019-09-08 at 03:02 and last updated on 2019-09-22 at 04:27.