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The narrows is a hot spot for marine activity and a popular marine passage between Nanaimo and the Southern Gulf Islands. Passage through Dodds Narrows is described in detail in Margaret Sharcott's 1957 book, Troller's Holiday. [2] The trail also passes through Garry Oak ecosystems, and features in genetic studies of endangered Garry Oak ...
Seymour Narrows is a 5-kilometre (3.1 mi) section of the Discovery Passage in British Columbia known for strong tidal currents. [1] Discovery Passage lies between Vancouver Island at Menzies Bay, British Columbia and Quadra Island except at its northern end where the eastern shoreline is Sonora Island .
Access by boat from Nanaimo in the north is through Dodd Narrows. From Vancouver, vessels pass between Gabriola Island and Valdes Island through Gabriola Passage. Both Dodd Narrows and Gabriola Passage have strong tidal currents. Gabriola and Valdes Islands protect these smaller islands from the more open Strait of Georgia.
Tidal race or tidal rapid is a natural occurrence whereby a fast-moving tide passes through a constriction, resulting in the formation of waves, eddies and hazardous currents. The constriction can be a passage where the sides narrow, for example the Gulf of Corryvreckan and the Saltstraumen maelstrom , or an underwater obstruction (a reef or ...
The phenomenon occurs at the entrance to the Minas Basin, which is known for the globe's highest tides. [ 1 ] [ 2 ] The turbulence does not result from a simple rip tide , but rather from the collision of three opposed tidal currents whose violence is enhanced by the presence of a subsurface reef that forces the water upward.
Ripple Rock (French: Roche Ripple) [1] is an underwater mountain located in the Seymour Narrows of the Discovery Passage in British Columbia, Canada.It had two peaks (2.74 metres and 6.4 metres below the surface at low tide) that produced large, dangerous eddies from the strong tidal currents that flowed around them at low tide.
A tidal atlas or a tidal stream atlas is used to predict the direction and speed of tidal currents. A tidal atlas usually consists of a set of 12 or 13 diagrams, one for each hour of the tidal cycle, for a coastal region. Each diagram uses arrows to indicate the direction of the flow at that time.
The water stops rising, reaching a local maximum called high tide. Sea level falls over several hours, revealing the intertidal zone; ebb tide. Oscillating currents produced by tides are known as tidal streams or tidal currents. The moment that the tidal current ceases is called slack water or slack tide. The tide then reverses direction and is ...