The , is an underground water infrastructure project in
Kasukabe, Saitama
is a special city located in Saitama Prefecture, Japan. , the city had an estimated population of 233,278 in 108,328 households and a population density of . The total area of the city is . Kasukabe is famous for the production of , traditi ...
, Japan. It is the world's largest underground flood water diversion facility, built to
mitigate overflowing of the city's major waterways and rivers during rain and
typhoon
A typhoon is a mature tropical cyclone that develops between 180° and 100°E in the Northern Hemisphere. This region is referred to as the Northwestern Pacific Basin, and is the most active tropical cyclone basin on Earth, accounting for a ...
seasons. It is located between Showa and Kasukabe in Saitama prefecture, on the outskirts of the city of Tokyo in the Greater Tokyo Area.
Work on the project started in 1992 and was completed by early 2006. It consists of five concrete containment silos with heights of and diameters of , connected by of tunnels, beneath the surface, as well as a large water tank with a height of , with a length of , with a width of , and with fifty-nine massive pillars connected to seventy-eight pumps that can pump up to of water into the
Edo River
The is a river in the Kantō region of Japan. It splits from the Tone River at the northernmost tip of Noda City in the Sekiyado district, crosses through Nagareyama and Matsudo, and empties into Tokyo Bay at Ichikawa, Chiba Prefecture. The Edo ...
per second.
See also
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Tunnel and Reservoir Plan The Tunnel and Reservoir Plan (abbreviated TARP and more commonly known as the Deep Tunnel Project or the Chicago Deep Tunnel) is a large civil engineering project that aims to reduce flooding in the metropolitan Chicago area, and to reduce the harm ...
(in
Chicago
(''City in a Garden''); I Will
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, coordinates =
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)
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Basilica Cistern (in Istanbul)
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Underground Construction
Underground construction refers to the construction of underground tunnels, shafts, chambers, and passageways, it is also sometimes used to describe the portion of traditional construction that takes place below grade.
History
Neanderthals also e ...
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Stormwater
Stormwater, also spelled storm water, is water that originates from precipitation (storm), including heavy rain and meltwater from hail and snow. Stormwater can soak into the soil ( infiltrate) and become groundwater, be stored on depressed la ...
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Sewerage
Sewerage (or sewage system) is the infrastructure that conveys sewage or surface runoff (stormwater, meltwater, rainwater) using sewers. It encompasses components such as receiving drainage, drains, manholes, pumping stations, storm overflows, a ...
References
External links
* (including photos)
{{Coord, 35, 59, 51, N, 139, 48, 42, E, display=title
Aqueducts in Japan
Buildings and structures in Saitama Prefecture
Flood control projects
Flood control in Japan
Geography of Saitama Prefecture
Macro-engineering
Science and technology in Japan
Tourist attractions in Saitama Prefecture
Water tunnels
Drainage tunnels
Tunnels in Japan