subterranean river

A subterranean river is a river or watercourse that runs wholly or partly beneath the ground, one where the riverbed does not represent the surface of the Earth. It is distinct from an aquifer, which may flow like a river but is contained within a permeable layer of rock or other unconsolidated materials. A river flowing below ground level in an open gorge is not classed as subterranean.

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Wikimedia, Wikidata
underground river; underground stream
river, subterranea, 

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buried watercourse, subterranean waterfall, subterranea, Ибрин понор, Ракин понор, 

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Location: KML, Cluster Map, Maps,
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  Sistema Sac Actun ⓘ
  flooded cave system in the Yucatan Peninsula, Mexico

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  Ибрин понор ⓘ
  

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  Ракин понор ⓘ
  

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  buried watercourse ⓘ
  section of a watercourse which is covered or drained into an underground pipeline

Frameless

Sternes Cave - The second waterfall of the subterranean river Ichor.

The first waterfall of the subterranean river Ichor.

Sternes cave - The first impressive waterfall of the Ichor river.

Another View of River Styx (536009b3-bd09-43b4-98f3-5e1d7e84f174)

Berlin Bäkepark Steglitz asv2021-05 img3

Berlin Bäkepark Steglitz asv2021-05 img4

Underground River in the city of Cancun, Quintana Roo.

PSM V49 D269 The subterranean river midroi

PSM V49 D268 Plan of the subterranean river midroi

PSM V49 D270 A passage in the subterranean river midroi

• Revealing the stygobiotic and crenobiotic molluscan biodiversity hotspot in Caucasus: Part I. The phylogeny of stygobiotic Sadlerianinae Szarowska, 2006 (Mollusca, Gastropoda, Hydrobiidae) from Georgia with descriptions of five new genera and ... - scientific article published on 5 August 2020

Type	Subtype	Date	Description	Notes	Source
classes	subterranea		Norwich cockeys	subterranean river	Wikidata
classes	subterranea		subterranean waterfall	waterfall, subterranean river	Wikidata
site	cave		Sistema Sac Actun	subterranean river, cave	Wikidata
site	cave		Ибрин понор	subterranean river, cave	Wikidata
site	cave		Ракин понор	subterranean river, cave	Wikidata
site	tunnel		buried watercourse	culvert, subterranean river, water tunnel	Wikidata
commons	image		Sternes Cave - The second waterfall of the subterranean river Ichor.		Commons
commons	image		The first waterfall of the subterranean river Ichor.		Commons
commons	image		Sternes cave - The first impressive waterfall of the Ichor river.		Commons
commons	image		Another View of River Styx (536009b3-bd09-43b4-98f3-5e1d7e84f174)		Commons
commons	image		Berlin Bäkepark Steglitz asv2021-05 img3		Commons
commons	image		Berlin Bäkepark Steglitz asv2021-05 img4		Commons
commons	image		Underground River in the city of Cancun, Quintana Roo.		Commons
commons	image		PSM V49 D269 The subterranean river midroi		Commons
commons	image		PSM V49 D268 Plan of the subterranean river midroi		Commons
commons	image		PSM V49 D270 A passage in the subterranean river midroi		Commons