A subterranean river is a river that runs beneath the ground surface. These rivers can either be entirely natural, or a result of the deliberate installation of a culvert to channel a flow from the surface to underground, usually as a part of urban development. This bridge across the Danube River links Hungary with Slovakia. ... A culvert is a flowing body of water which passes underneath a road, railway, or embankment, or the part thereof that does so. ... Urban, city, or town planning, deals with design of the built environment from the municipal and metropolitan perspective. ...

To reverse this process is known as daylighting a stream and is a visible form of river restoration. One successful example is the Cheonggye Stream in the centre of Seoul.^[1] In urban design and urban planning, daylighting is the redirection of a stream into an above-ground channel. ... Cheonggye Stream, also known as Cheong Gye Cheon, also spelled in one word Cheonggyecheon, is a 5. ... Seoul (서울)   [] is the capital of South Korea and is located on the Han River in the countrys northwest. ...

Examples of subterranean rivers include:

• London's River Fleet
• Zenne flowing underground through Brussels
• the Dommel underneath 's-Hertogenbosch in the Netherlands
• The Mojave River in southern California
• Santa Fe River in northern Florida.
• Palawan in Puerto Princesa Subterranean River National Park on the island of Palawan, Philippines
• Son Trach river in Vietnam
• the Sac Actun system (named after the Mayan name of the larger of the two branches) is the result of a confirmed connection between two other rivers previously thought to be separate. Discovered by divers Robbie Schmittner and Steve Boagarts in January 2007, the full length is 153.6 kilometers long and a maximum depth of 72 meters underneath the Yucatán Peninsula.^[2]

Another notable example is the subterranean portion of the Nile River. This article is about the capital of England and the United Kingdom. ... Entrance to the Fleet River, Samuel Scott, c. ... The Zenne (Dutch) or Senne (French) is a small river that flows through Brussels. ... Nickname: Map showing the location of Brussels in Belgium Coordinates: , Country Belgium Region Brussels-Capital Region Founded 979 Founded (Region) June 18, 1989 Government  - Mayor (Municipality) Freddy Thielemans Area  - Region 162 km²  (62. ... The Dommel is a stream in Belgium and The Netherlands. ... s-Hertogenbosch ( ) (literally The Dukes Forest), colloquially known as Den Bosch ( (help· info)) — translated in French as Bois-le-Duc, in German as Herzogenbusch and in Spanish as Bolduque — is a municipality in the Netherlands, and also the capital of the province of North Brabant. ... The Mojave River is a river in the Mojave Desert, California. ... Official language(s) English Capital Sacramento Largest city Los Angeles Area  Ranked 3rd  - Total 158,302 sq mi (410,000 km²)  - Width 250 miles (400 km)  - Length 770 miles (1,240 km)  - % water 4. ... The Santa Fe River is a 75 mile (121 km) river in northern Florida. ... Official language(s) English Capital Tallahassee Largest city Jacksonville Largest metro area Miami Area  Ranked 22nd  - Total 65,795[1] sq mi (170,304[1] km²)  - Width 361 miles (582 km)  - Length 447 miles (721 km)  - % water 17. ... Please wikify (format) this article as suggested in the Guide to layout and the Manual of Style. ... Palawan is an island province of the Philippines located in the Mimaropa region. ... The Yucatán peninsula as seen from space The Yucatán Peninsula separates the Caribbean Sea from the Gulf of Mexico. ... The Nile (Arabic: , transliteration: , Ancient Egyptian iteru, Coptic piaro or phiaro) is a major north-flowing river in Africa, generally regarded as the longest river in the world. ...

A flow somewhat similar to a subterranean river is a large body of moving water that exists in the Atlantic Ocean near the floor, part of the North Atlantic Current.^{[citation needed]} The North Atlantic Current (North Atlantic Drift and the North Atlantic Sea Movement) is a powerful warm ocean current that continues the Gulf Stream northeast. ...

See also

• Speleology
• Subterranean rivers of London
• Cromwell current, Submarine river

Grotte des Faux-Monnayeurs, Switzerland Speleology is the scientific study of caves and other karst features, their make-up, structure, physical properties, history, life forms, and the processes by which they form (speleogenesis) and change over time (speleomorphology). ... The subterranean or underground rivers of London are the tributaries of the River Thames and River Lea that were built over during the growth of the metropolis of London. ... The Cromwell current (also called Pacific Equatorial Undercurrent or just Equatorial Undercurrent) is a submarine river: A particular kind of ocean current that is, in effect, a river flowing under the surface of an ocean. ...

Notes and references

1. ^ Kirk (13 October 2005)
2. ^ (English) Divers Discover The Worlds Longest Underground River (Deutsche Presse-Agentur)

October 13 is the 286th day of the year (287th in leap years) in the Gregorian calendar. ...

Bibliography

• Kirk, Donald. "Seoul peels back concrete to let a river run freely once again", World>Asia Pacific, The Christian Science Monitor, 2005-10-13. Retrieved on 2006-08-21.