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The long and narrow rectangular shape of the Adriatic Sea is the source of an oscillating water motion (called seiche) along the basin's minor axis. [5]The principal oscillation, which has a period of 21 hours and 30 minutes and an amplitude around 0.5 meters at the axis' extremities, supplements the natural tidal cycle, so that the Adriatic Sea has much more extreme tidal events than the rest ...
The single-step Pedro Miguel locks have a lift of 31 ft (9.4 m). The lift at Miraflores actually varies due to the extreme tides on the Pacific side, between 43 ft (13 m) at extreme high tide and 64.5 ft (20 m) at extreme low tide; tidal differences on the Atlantic side are very small. [5]: 195ff
The mean sea level at the Pacific side is about 20 cm (8 in) higher than that of the Atlantic side due to differences in ocean conditions such as water density and weather. [ 147 ] The 2015–2016 fiscal year was one of the driest periods on record, restricting ships passage; [ 148 ] 2019 was the fifth driest year for 70 years.
Sea level rises over several hours, covering the intertidal zone; flood tide. The water stops rising, reaching a local maximum called high tide. Sea level falls over several hours, revealing the intertidal zone; ebb tide. Oscillating currents produced by tides are known as tidal streams or tidal currents. The moment that the tidal current ...
A chart datum is the water level surface serving as origin of depths displayed on a nautical chart and for reporting and predicting tide heights. A chart datum is generally derived from some tidal phase, in which case it is also known as a tidal datum. [1] Common chart datums are lowest astronomical tide (LAT) [1] and mean lower low water (MLLW).
Such weather-related effects on the tide can cause ranges in excess of predicted values and can cause localized flooding. These weather-related effects are not calculable in advance. Mean tidal range is calculated as the difference between mean high water (i.e., the average high tide level) and mean low water (the average low tide level). [2]
Tide tables, sometimes called tide charts, are used for tidal prediction and show the daily times and levels of high and low tides, usually for a particular location. [1] Tide heights at intermediate times (between high and low water) can be approximated by using the rule of twelfths or more accurately calculated by using a published tidal ...
The intertidal zone or foreshore is the area above water level at low tide and underwater at high tide; in other words, it is the part of the littoral zone within the tidal range. This area can include several types of habitats with various species of life , such as sea stars , sea urchins , and many species of coral with regional differences ...
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