Is a periodic rise and fall of each ocean waters including the waters of open seas and bays. The result of tidal influence of the gravity of the moon and the sun on the earth itself, and in particular on the water.
The Moon is the main reason that leads to the tides due to its proximity to the Earth than the sun. When the moon is above a certain point of the earth's surface directly, it affects a significant impact on the body of water that rise - accordingly - above the usual level. Usually there are two waves of opposite approaches tidal Taatakabban in a continuous cycle in each lunar day. The average length of the lunar day 24 hours and 50 minutes and 28 seconds.
As the sun also lead to high waves of opposing tides. But because the sun is farther from Earth than the moon, the solar power islands is 46% of the islands of Comoros. And result in the total labor efforts of the sun and the moon to the wave consists of two summits of the tides depends on its relative positions of both the sun and the moon at that time. During the period of the crescent and full moon when all of the sun and the moon and the earth in a straight line, the waves of solar and lunar coincide with each other, and this in turn leads to a condition known islands spring where there is a higher value for the extension, and the highest value of the islands.
In the third century AH / ninth century, himself an independent Canadian mission in bug tidal stating causes and types. We know one of two types of tides and tidal natural defined as: 'the impossibility of water from the small body to the bone'. And the second tide of casual and defined as: 'to increase the water Bansbab materials', as in the rivers and valleys and Fayyod sourced from rivers. He pointed out that such an extension does not show an increase, and that the small amount of water added to it and other rivers, as compared with sea water, and also because of evaporation actually have.
The Department of Canadian natural extension of three types:
I: the tide is the annual increase in sea water at a specific time of the year in the position without a position, by the movement of celestial bodies.
II: a monthly tide occurs by the changing fortunes of Take Over in rotation around the Earth.
III: the tide is the daily reality of the impact of light upon the moon, and shall begin with the duration of the rising of the moon it, and starts when the islands starts the demise of the moon from the designated heads of his family.
The Canadian link in all cases between the law of expansion and its relationship to the wind, and a link to their respective tidal.
In the mid-twentieth century began to use the energy emitted by the tides in the production of electricity. In this case it is building the power station at the mouths of rivers. When the flow of the islands of the river next passes through the dam, and the payment of the turbine and then trap water behind the dam. When extended islands, off the water trapped and flows through the dam turbines shall be paid again. Works like these stations efficiently if the difference between the highest value of the islands and the least value has about 8.5 meters.