Source: aajtak
In terms of technology, Japan is ahead of many countries. On the morning of August 30th, Tokyo experienced heavy rainfall due to Typhoon Shanshan. The rising water levels in two local rivers threatened to flood the city, but an underground structure, famously known as the 'Cathedral' or 'Shrine', prevented a disaster. This system kept the city safe from flooding.
(All photos: Reuters)
Source: aajtak
Within this cavernous space, there are 59 colossal columns, each weighing 500 tons and standing 59 feet tall. When nearby rivers threaten to overflow, excess water is redirected into this 6.3-kilometer-long cathedral. The water is stored temporarily and then drained once the weather calms.
Source: aajtak
Professor Sita Imori of Tokyo University highlights that as temperatures rise, so does the atmospheric moisture, leading to increased rainfall. The cathedral’s tunnels are pivotal in preventing urban flooding. Sita Imori, a Nobel Prize laureate in Climate Science (2007), provides crucial insights into its operation.
Source: aajtak
Officially named the Metropolitan Outer Area Underground Discharge Channel (MOAUDC), whenever there's a looming threat of floods due to heavy rains or ocean surges, this ingenious system springs into action, safeguarding Tokyo.
Source: aajtak
Imori emphasizes that while the future remains unpredictable, the impact of rising temperatures is a global challenge. Such technological marvels are essential worldwide to protect urban areas from inevitable flooding.
Source: aajtak
The cathedral complex took 13 years to complete, costing approximately ¥1.368 billion. It became fully operational in 2006. Since then, it has saved the region from damages over twice its construction cost.
Source: aajtak
This engineering marvel has preserved crops, cities, and infrastructure like shops and warehouses from flood-induced damage numerous times. It's not only a testament to engineering brilliance but also a renowned tourist attraction, with films often shot here. The cathedral can store as much water as 100 Olympic-sized swimming pools.
Source: aajtak
Situated six stories below ground, the cathedral boasts a unique microclimate, staying cool in summers and warm in winters. Sometimes misty clouds can be seen grazing the tops of its columns.
Source: aajtak
Modern sunlight arrangements have been set up for interior lighting, complemented by additional lights. The entire tunnel system is monitored via cameras, with all gates operated from a master control center.
