Pressure control water tank. 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 Kasukabe, Saitama, Japan.It is the world's largest underground flood water diversion facility, built to mitigate overflowing of the city's …

This concrete tunnel system running 50 meters deep and 6.3 kilometers long is also known as “The Underground Tunnel.” This feat of modern engineering was built from 1993 to 2006. About seven times a year, it diverts water from heavy rainstorms and keeps the streets in the watershed and urban areas (areas north of Tokyo) from turning into ...

2021年3月19日 · It features an impressive 22m deep pressure adjusting water tank that is the size of two football fields, and five water intake banks, the largest being over 70 meters deep. The whole system of tunnels, water intakes and the pressure adjusting water tank covers a total length of 6.3km and has the ability to pump the equivalent of an olympic ...

2024年9月3日 · The system, located about 20 miles north of central Tokyo, features five massive vertical shafts connected by 6.3 kilometers of tunnels, all situated 50 meters underground. These shafts funnel excess water from smaller rivers into the larger Edo River, preventing urban areas from flooding during heavy rains.

2014年1月27日 · The systems consists of 6.4km of tunnels up to 50m (163ft) underground connecting five giant silos 65m (211ft) high and 32m (104ft) wide to one massive tank, the “Underground Temple”. This giant reservoir is the centrepiece of the system, and is a flood chamber or surge tank measuring 25.4m (83ft) high, 177m (581ft) long and 78m (256ft ...

2024年9月27日 · General view shows a pressure-adjusting water tank, part of a complex of underground water discharge tunnels which was constructed to protect Tokyo and its suburbs against floods during heavy rain ...

Put simply, water collected by overflow levees during heavy rains flows into underground shafts — each large enough to fit the Statue of Liberty — and is carried by tunnel to the pressure ...

A world-class underground discharge channel has been constructed on the outskirts of Tokyo, the capital of Japan. The tunnel, dug about 50 meters below ground, extends 6.3 km in total. The underground construction, comprising vertical shafts to store floodwater – which look more like gigantic tanks – and a mammoth water tank supported by ...

Tokyo’s Underground Temple – Tunnels That Protect Tokyo From Floods. ... At maximum capacity, the system can handle up to 670,000m3 of water. and in order to offload this into the Edogawa river quickly and efficiently, this facility is equipped with 4 incredibly powerful, 14,000 horsepower pumps that can discharge water at up to 200 cubic ...

2018年11月29日 · Each of these tanks is big enough to accommodate a space shuttle or the Statue of Liberty and they are interconnected through a 6.3km long network of underground tunnels. As the water approaches ...