Tidal time of Wenzhou Gregorian calendar

Tidal Timetable of Oujiang River in Wenzhou City, Zhejiang Province

Lunar date

Tidal rise

Chaoping

Junior one, sixteen years old.

It's five past six

10:30

Junior high school, grade two and grade seventeen

half past six

1 1:00

Third grade and eighteen years old

twenty five past seven

1 1:40

The fourth and nineteenth days of junior high school

Ten minutes to eight

12:20

The fifth and twentieth days of junior high school

half past eight

13:00

Day 6, Day 2 1 day

nine?o'clock

13:40

The seventh day, twenty-two.

Twenty minutes to ten.

14:30

Eighth grade, 23 years old

10:20

15:20

Day 9 and Day 24

1 1:30

16:30

The tenth and twenty-fifth days.

12:20

17:40

Eleven, twenty-six

13:50

18:40

Twelve, twenty-seven

15:00

19:30

Thirteen, twenty-eight

16: 10

Eight twenty p. m.

Fourteen, twenty-nine

17: 10

2 1: 10

Fifteen, thirty

17:50

2 1:50

1 The tidal cycle is 12 hours and 25 minutes.

Teach you a formula, the error will not be too big. Of course, those who are far away from the Oujiang River mouth will be a little later: the ebb tide time = (lunar calendar -3)* 0.8, for example, the ebb tide time on the tenth day of the lunar calendar is about: 7*0.8=5.6, that is, around 5: 00 (with 17), at noon on the third and eighteenth day (.

The law of high tide and low tide is that there are two high tides every day, and the interval is 12 hours. The high tide usually lasts for more than an hour before it begins to ebb, and the lowest time of ebb is in the middle of the two high tides.

The time of high tide is different every day, and it comes back every 15 days. Therefore, the climax of the next day is 0.8 hours (48 minutes) later than that of the previous day, and the daily climax time can be calculated according to the lunar calendar date.

The calculation formula is as follows:

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

16th to 30th day of the lunar calendar: high tide time = (date-15)* 0.8.

Tide is a natural phenomenon in the coastal areas of China. In ancient times, the daytime was called "tide" and the evening was called "sunseeker", both of which were called "tide". It is caused by the attraction of the sun and the moon to the earth. It also corresponds to the traditional lunar calendar in China. On the first day of each month (15th and16th) of the lunar calendar, that is, the new moon, the sun and the moon are on one side of the earth, so they have the largest tidal force, which will cause a "spring tide". When the phases of the moon are the first quarter moon and the second quarter moon, that is, on the eighth and twenty-third days of the lunar calendar, the tidal force of the sun and the tidal force of the moon cancel each other out, so a "small tide" occurs. Therefore, there is a "high tide on the fifteenth day of the first day" in Rizhao agricultural proverbs; On the eighth and twenty-third days, I saw the beaches everywhere and the fifteenth day (dawn) of the first day was full. I worked hard and slowly. Twenty-three on the eighth day, two (morning and evening) work a day. Because the moon moves eastward more than 13 degrees on the celestial sphere every day, which is about 50 minutes in total, that is, the noon time of the moon (1 lunar day =24: 50) is delayed by about 50 minutes every day (there will be tides at the next noon, usually twice a day), so the time of high tide is also delayed by about 50 minutes every day.