Traditional Culture Encyclopedia - Almanac inquiry - When are the high tide and low tide?
When are the high tide and low tide?
There is a formula to calculate the ebb and flow of the tide: two jobs a day on the eighth day; The first day and the fifteenth day, two whole days.
High tide and low tide principle
Because the ebb and flow of seawater are geographical phenomena influenced by the gravity of the moon, they are regular, with a period of 15 days. Therefore, the next day's high tide is 0.8 hours (48 minutes) later than the previous day's high tide, and the daily high tide time can be calculated according to the lunar calendar date.
The specific calculation method is: according to the lunar calendar, if the number of days is less than 15, directly multiply the number of days by 0.8, and the figure obtained is the highest climax time of the day; If the number of days is greater than 15. You must subtract the number of days from 15, and then multiply it by 0.8 to get the highest climax time in a day. At the same time, the interval between high tide and low tide is generally 6 hours, which means that high tide and low tide are twice a day.
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