Low tide schedule of Ninghai Xiayang beach

The low tide schedule of Ninghai Xiayang Beach is as follows:

1, eighth day, 23rd day, high tide11:36; Low tide17: 48;

2. On the ninth and 24th day of the ninth lunar month, the high tide12: 24; Low tide18: 36;

3. The high tide in the first month 10 and 25th13:12; Low tide19: 24;

4, 1 1, 26, high tide14: 00; Low tide 20:12;

5,12,27, high tide14: 48; Low tide 21:00;

6,14,28, high tide15: 36; Low tide 21:48;

7,15,29, high tide16: 24; Low tide at 22: 36;

8, 16, 30, high tide17:12; The tide ebbs at 23:24.

The data comes from the question.

Reasons for low tide:

The reason of low tide is related to both the moon and the sun, that is, the tidal force that is often heard comes from the attraction of the moon and the sun to the earth. Tidal-generating force is an integral force, which is not completely determined by the magnitude of gravity, but because the earth is so big, the magnitude and direction of gravity borne by different parts of the earth are not exactly the same, and there are "force difference" and "direction difference", which are two differences that cause tidal-generating force.

The characteristic of tidal force is that the star is stretched along the direction of gravity and compressed in the direction perpendicular to gravity. That's how the tides on the earth come from. It can be seen from the word "stretch" that they are in two directions, so the tides on the earth fluctuate twice a day. Tides caused by the sun are smaller than those caused by the moon, because the moon is much closer to the earth.

The law of seawater fluctuation is: there are two high tides every day, with an interval of 12 hours. The high tide generally lasts for more than an hour before the low tide begins, and the low tide time is at least between the two high tides.

The time of high tide is different every day, and it is repeated every 15 days. Therefore, the climax of the next day was delayed by 0.8 hours (48 minutes) compared with the previous day. The daily high tide time can be calculated according to the lunar calendar date, and the calculation formula is as follows:

The first to fifteenth day of the lunar calendar: high tide time = date *0.8.

Lunar calendar 16 to 30: high tide time = (date-15)*0.8.