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Narrow seaway connecting two bodies of water

Tidal strait

Tidal strait
Arthur Kill tidal strait, Prall's Island visible
Arthur Kill tidal strait, Prall's Island visible
The Johor–Singapore Causeway disrupts tidal flow on the Strait of Johor.
The Johor–Singapore Causeway disrupts tidal flow on the Strait of Johor.
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A tidal strait is a strait through which a tidal current flows. Tidal currents are usually unidirectional but sometimes are bidirectional. Tidal straits, though they are narrow seaways, are technically not rivers. They are frequently of tectonic origin. In them, currents develop because of elevation differences between the water basins at both ends. Tidal straits can connect seas and oceans, as well as estuarine zones.

Tides sometimes allow sediments to collect in tidal straits.

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