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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.^{citation needed}

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.

Examples of subterranean rivers include:

• The River Fleet in London
• The River Frome in Bristol
• The Dommel underneath 's-Hertogenbosch in the Netherlands
• The Lost River of West Virginia, which disappears underground and reappears as the Cacapon River
• The Mojave River in southern California
• The Palawan in Puerto Princesa Subterranean River National Park on the island of Palawan, Philippines
• The Sac Actun system (named after the Mayan name of the larger of the two branches) in the Yucatán Peninsula 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 surface.
• The Santa Fe River in northern Florida
• Son Trach river in Vietnam
• The Zenne flowing underground through Brussels, following the covering of the Zenne

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}

See also

• Speleology
• Subterranean rivers of London
• Cromwell current
• Submarine river
• Nene Tributary at Ramsey Cambridgeshire runs under the entire length of the main road http://historic-ramsey.net

Notes and references

Bibliography

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

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