DISASTER RISK SENDAI FRAMEWORK COUNTRIES & REGIONS THEMES HAZARDS KNOWLEDGE BASE
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Japan

The underground cathedral protecting Tokyo from floods

29 Nov 2018, BBC

A makeshift floodwater cathedral hidden 22 metres underground is part of the Metropolitan Area Outer Underground Discharge Channel, a 6.3 km system of tunnels and towering cylindrical chambers that protect North Tokyo from flooding. But as climate change threatens heavier precipitation, uncertainties loom over the system's effectiveness.



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