The ebb and flow is characterized by vertical fluctuations in ocean level. They appear due to changes in the position of the Sun and Moon in relation to the Earth and the rotation of the Earth itself. Tides are the cause of horizontal movements of water - tidal currents.

Tides occur in all bodies of water, but with varying intensity. First of all, this is influenced by the connection with the world ocean, the differences in lakes are minimal. If the oscillation amplitude is significant at the mouth of a river or a narrow bay, then a powerful tidal wave may form, rising high upstream. In China, on the Fuchunjiang River, such a wave reaches a height of up to 9 meters and moves at a speed of 40 km/h. Since the Earth's satellite is much closer to us than to the Sun, its effect on the tides is more significant. The frequency of tides is related to the time of the Moon's rotation around the globe.

The moon does not attract the particles of the Earth evenly – those that are closer are stronger. Thus, the water shell is deformed. Two tidal protrusions form on the surface of the Earth – on the side facing the Moon and on the opposite side. There is excess water there - the tide, respectively, at points far from the ledges the water becomes less – there is a low tide. As a result of the rotation of the Earth and the movement of the Moon around the Earth, the tidal protrusions are constantly moving. Observing from Earth, the Moon makes a complete revolution in 24 hours and 50 minutes, during which time a tidal wave bends around the globe, and since there are two protrusions, the interval between tides is 12 hours and 25 minutes. In the open ocean, the water level drop is almost imperceptible – about 1 meter. Near the shore, which is an obstacle, water accumulates throughout the tide, and the rise in the level is more noticeable. The fluctuation of the water level in bays and bays is even more significant. The largest tides are observed in one of the bays of the coast of Canada - 18 meters. The height of the tide in one area is variable. It depends on the distance of the moon and the position of the Sun. During the new moon and full moon periods, the Sun enhances the tidal wave, and in the first and third quarters it counteracts it. Since the positions of the luminaries are not difficult to calculate, you can create a "Tide Table" for any period of time for each area. Heavenly bodies cause, in addition to water tides, air tides, as well as vertical fluctuations of the earth's surface up to several tens of cm (because the Earth is not absolutely solid). The powerful force of the tides of water is used in tidal power plants. They are environmentally friendly and produce relatively cheap energy, but the changing power during the day creates certain difficulties. Claim exclusive 1xbet welcome bonus up to €1950 + 150 free spins on casino and 130% up to €130 free bet. Sign up on their website using the promo code for 1xbet you get to claim a welcome bonus. New users can unlock the welcome package by using the 1xBet promo code. Using this welcome bonus code, you can claim a bonus of 100% to the deposit amount.