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Tide Raising Forces
Are the results of the gravitational and centrifugal influences of the Sun-Earth-Moon system on bodies of water upon the Earth's surface.
3 Types of Tides
Diurnal Tides- 1 High Water and 1 Low Water tide per day
Semi-Diurnal Tide- 2 High Water and 2 Low Water tides per day
Mixed Tides- A tide which is intermediate between predominantly diurnal and predominantly semi-diurnal tides.
The predictable relationships of the sun & moons motions are used to identify the mathematical components of the tide-raising force. The tide generated by this force is called the equilibrium tide.
It assumes a frictionless sea of uniform depth with out land masses.
- The tide we actually experience and observe.
- It is generated by the forces which make up the equilibrium tide, but is modified by various natural phenomena.
Factors generating Real Tides
- Natural Resonance of water body
- Land Masses
- Shallow Water
- Coriolis Effect
Is the horizontal movement which accompanies the rise and fall of the tide.
Is any horizontal movement of the sea that is not caused by the tide.
They are caused by prevailing winds and water masses of different salinities or temperatures.
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