Tidal Currents

Tidal Currents

 

currents that are caused by the tide-generating forces of the moon and sun and that periodically change direction and speed. The basic components of tidal currents have periods of 12 and 24 hours. In the open sea, tidal currents are rotatory, or circular, with speeds up to 0.5 knot (25 cm/sec). Near shore, in narrow gulfs, and in straits, they approach and recede and may reach speeds exceeding 10 knots (500 cm/sec).

References in classic literature ?
Maggie had no time to answer, for a new tidal current swept along the line of the houses, and drove both the boats out on to the wide water, with a force that carried them far past the meeting current of the river.
The tidal current runs to and fro in its unceasing service, crowded with memories of men and ships it had borne to the rest of home or to the battles of the sea.
The kinetic energy of tidal currents produces stable electricity supply.
Crabbers should ensure their pots have enough rope attached to the float so they are not lost in strong tidal currents.
If tidal currents contained that much energy, the economics would be quite stellar and entirely worthy of his final exclamation mark.
Sand sized sediments are concentrated by tidal currents in a branching pattern oftidal channels and fringing tidal flats.
There are high-wire cable walkers, riggers, marathon runners and stunning aerial footage, and the film also reveals the behind-thescenes battle to maintain the iconic structure, suspended above the dangerous tidal currents of the Severn, and keep traffic flowing.
DeltaStream is an underwater turbine designed to convert the energy of tidal currents into electricity in much the same way as a wind turbine does with the wind.
The scheme, by developer Minesto AB, aims to maximise electricity generation from low-velocity tidal currents using systems based on the way a kite moves through the air which will allow equipment to move through the water column 10 times faster than the current, leading to 1,000 times more power.
Analytical assessments on the potential of harnessing tidal currents for electricity generation in Malaysia", Renewable Energy, 35: 1024-1032.
Consequently, rather than concentrating on scaled-up barrage technology with its anticipated environmental impacts, researchers have spent the last decade focused on developing arrays of underwater turbines to tap fast-flowing tidal currents.