Download
1 / 12
130 likes | 286 Views
Tides and Tidal Power. Tides. Tides: The periodic rise and fall of the sea surface. Tide Terms. Tidal Day: 24 Hours, 50 minutes (2 high, 2 low each day) Tidal Period: Time between successive high (or low) tides . Tidal Range: Difference between the highest and lowest tide levels.
E N D
Tides • Tides: • The periodic rise and fall of the sea surface.
Tide Terms • Tidal Day: 24 Hours, 50 minutes (2 high, 2 low each day) • Tidal Period: Time between successive high (or low) tides.
Tidal Range: Difference between the highest and lowest tide levels. Daily Inequality: Difference between the heights of successive high or low tides. Note : Tides change from week to week.
Spring and Neap tides Spring Tides: These are peak high tides and minimum low tides occurring at the new and full moon when the moon and sun are positioned in opposition to each other. http://www.sfgate.com/getoutside/1996/jun/tides.html Neap Tides: These tides are neither very high nor very low (the tidal range is small) and occur when the sun and moon are pulling against each other at the first and final quarters of the moon
Cause of Tides Animation: http://www.pbs.org/wgbh/nova/venice/tides.html
Tide Tables DFO Tide Tables: http://www.tides.gc.ca/english/Canada.shtml
A huge dam (called a "barrage") is built across a river estuary. When the tide goes in and out, the water flows through tunnels in the dam. • The ebb and flow of the tides can be used to turn a turbine, or it can be used to push air through a pipe, which then turns a turbine. • If needed, large lock gates, like the ones used on canals, allow ships to pass.
