How Japan Keeps Millions of Residents Safe From Floods

The video discusses the world's largest underground water facility located near Tokyo. This facility, known as the Metropolitan Area Outer Underground Discharge Channel, is a massive tunnel system designed to prevent flooding in the region. It features large vertical shafts that store floodwaters and redirect them to a river capable of handling the excess water, thus protecting over 9 million residents from flooding.

What is the largest underground water facility in the world located near?

• Osaka

• Kyoto

• Nagoya

• Tokyo

How deep underground does the Metropolitan Area Outer Underground Discharge Channel sit?

• 100 feet

• 120 feet

• 160 feet

• 200 feet

What is the primary purpose of the large vertical shafts inside the tunnel?

• To store sewage

• To store industrial waste

• To store floodwaters

• To store drinking water

Why were the giant tunnels built in this area of Japan?

• To improve transportation

• To generate electricity

• To prevent constant flooding

• To enhance tourism

How does the facility ensure the safety of over 9 million residents?

• By storing water for droughts

• By building levees around towns

• By diverting floodwaters to a river

• By providing emergency shelters