engineering

Metropolitan Area Outer Underground Discharge Channel

Metropolitan Area Outer Underground Discharge Channel is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Metropolitan Area Outer Underground Discharge Channel rather than just read about it. In short: The Metropolitan Area Outer Underground Discharge Channel (Japanese: 首都圏外郭放水路, Hepburn: shutoken gaikaku hōsuiro), popularly known as G-Cans, is an underground water infrastructure project in 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 seasons.

Key takeaways

Metropolitan Area Outer Underground Discharge Channel belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Metropolitan Area Outer Underground Discharge Channel to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Metropolitan Area Outer Underground Discharge Channel from memory before moving on to harder problems.

Reference excerpt

The Metropolitan Area Outer Underground Discharge Channel (Japanese: 首都圏外郭放水路, Hepburn: shutoken gaikaku hōsuiro), popularly known as G-Cans, is an underground water infrastructure project in 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 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 65 metres (213 ft) and diameters of 32 metres (105 ft), connected by 6.4 kilometres (4.0 mi) of tunnels, 50 metres (160 ft) beneath the surface, as well as a large water tank with a height of 25.4 metres (83 ft), with a length of 177 metres (581 ft), with a width of 78 metres (256 ft), and with fifty-nine massive pillars connected to seventy-eight 10 MW (13,000 hp) pumps that can pump up to 200 metric tons (200 long tons; 220 short tons) of water into the Edo River per second.

G-Cans G-Cans, originally G-CANS PROJECT, is the name of a civic group whose goal is to "transform the area surrounding the Metropolitan Area Outer Underground Discharge Channel and the Shōwa Drainage Pump Station into a new cultural and community hub, utilizing these regional resources to promote regional development"; "CANS" represents the idea that "anything can be done with the ideas and actionable proposals of us citizens". While the term "G-Cans" is commonly used in English to refer to the Metropolitan Area Outer Underground Discharge Channel itself, it originally refers to this specific civic initiative.

In popular culture The facility was featured in the below series:

Chapter 6 of "KL Tower of Terror", a novel by Nayli Nasran.

See also Tunnel and Reservoir Plan (in Chicago) Basilica Cistern (in Istanbul) Underground construction Stormwater Sewerage

References

External links

Official website (including photos) (in Japanese)

Illustrations

Worked examples

Example 1 — a first encounter with Metropolitan Area Outer Underground Discharge Channel

Start with the simplest possible case. Write down what Metropolitan Area Outer Underground Discharge Channel claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Metropolitan Area Outer Underground Discharge Channel before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Metropolitan Area Outer Underground Discharge Channel ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Metropolitan Area Outer Underground Discharge Channel

In research: Metropolitan Area Outer Underground Discharge Channel appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Metropolitan Area Outer Underground Discharge Channel in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Metropolitan Area Outer Underground Discharge Channel is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2006 establishments in Japan, Aqueducts in Japan, Buildings and structures in Saitama Prefecture, so understanding it makes those chapters shorter.
In everyday life: Look for Metropolitan Area Outer Underground Discharge Channel outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Metropolitan Area Outer Underground Discharge Channel in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Metropolitan Area Outer Underground Discharge Channel means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Metropolitan Area Outer Underground Discharge Channel out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Metropolitan Area Outer Underground Discharge Channel in simple terms?

Why does Metropolitan Area Outer Underground Discharge Channel matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Metropolitan Area Outer Underground Discharge Channel?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Metropolitan Area Outer Underground Discharge Channel.