"an infrastructure built [in Tokio] for preventing overflow of the city's major waterways and rivers during rain and typhoon season. [...]
this "sci-fi"-like installation consists of "five 32m diameter, 65m deep concrete containment silos, connected by 64 kilometers of tunnels 50 meters deep underground. The system is powered by 14000 horsepower turbines which can pump 200 tons of water a second into a nearby river."
El caso es que en Dark Roasted Blend (www.darkroastedblend.com/2007/07/abandoned-tunnels.html un gran post dedicado a estructuras subterraneas)explican:
"an infrastructure built [in Tokio] for preventing overflow of the city's major waterways and rivers during rain and typhoon season. [...]
this "sci-fi"-like installation consists of "five 32m diameter, 65m deep concrete containment silos, connected by 64 kilometers of tunnels 50 meters deep underground. The system is powered by 14000 horsepower turbines which can pump 200 tons of water a second into a nearby river."