What is a tidal phenomenon?

Tidal sea tides is a continuous cyclical movements, occurred in the coastal or ocean, but the tides of time every day are not the same. 

 High tide, the water level of the maximum height is the climax; low tide when the water level of the minimum height is low. Day, two high tide and two low tides, known as the half-day surge, the more common types; There are also day-chao (day one of the climaxes, and a low tide) and mixed wave (sometimes on surges, sometimes half-wave). 

 Tide is a result of the moon, the sun and the Earth's gravity the result of each other. The moon than the sun close to the earth, so the quality is small, its influence larger than the sun. When the distribution of the three planets have been online at the same time (that is, when the new moon or full moon), the moon and the sun's role in mutually reinforcing, they have a particularly high tide; when the sun and the moon's position at right angles to the intersection when the half months, the role of the two partially offset each other, so the tide bit lower.