sump

A sump, or siphon, is a passage in a cave that is submerged under water. A sump may be static, with no inward or outward flow, or active, with continuous through-flow. Static sumps may also be connected underwater to an active stream passage. When short in length, a sump may be called a duck; however, this can also refer to a section or passage with some (minimal) airspace above the water.

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Wikimedia, Wikidata
subterranea, natural geographic object, cave, 

File:Sump (cave).svg

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subterranea, Sump, 

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Location: KML, Cluster Map, Maps,

Frameless

Agen Allwedd Cave

Siphon kungur

Port Miou P1017636mod

Port Miou P1017557mod

Chamois P1010100mod

Chamois P1011037mod

Chamois P1011086mod

Cabane P1010043mod

Combe du buis P1010486mod

Combe du buis P1010486mod

Type	Subtype	Date	Description	Notes	Source
commons	image		Agen Allwedd Cave		Commons
commons	image		Siphon kungur		Commons
commons	image		Port Miou P1017636mod		Commons
commons	image		Port Miou P1017557mod		Commons
commons	image		Chamois P1010100mod		Commons
commons	image		Chamois P1011037mod		Commons
commons	image		Chamois P1011086mod		Commons
commons	image		Cabane P1010043mod		Commons
commons	image		Combe du buis P1010486mod		Commons
commons	image		Combe du buis P1010486mod		Commons