Catalyst — Season 1, Episode 23: Tokyo Flood Prevention
Documentary, News • 30 min • 10 seasons, 164 episodes
Episode synopsis
Fifty meters beneath the teeming mega-city of Tokyo is an underworld river system - 6.4km of tunnels, colossal water tanks, massive pillars, giant pumps that remove 200 tons of floodwater every second. It’s an engineering marvel built to protect Tokyo against the increasing threat of flooding.
About Catalyst
Catalyst is Australia's premier science investigation series. Each week the team brings you stories from Australia and around the world, meeting scientists at the forefront of discovery.