Traditional Culture Encyclopedia - Almanac inquiry - High tide and low tide time in Tianjin
High tide and low tide time in Tianjin
You can find it in two ways: search for "China Maritime Network" on the computer webpage and add the "Ocean Weather Tide Query" applet on the mobile phone WeChat:
1. Search and open the webpage of "China Maritime Service Network-Tide Table" (ocean.cnss.com.cn/) by computer, and customize the port name and date.
2. Search for the "Ocean Weather Tide Query" applet on the mobile phone WeChat, click Enter, select "Tide" and enter "Tianjin" to query.
Extended data:
High tide refers to the natural phenomenon that the ocean surface rises regularly under the joint action of the moon and the sun. In the tidal cycle, the tidal level changes from low tide to the next high tide. Because the day is morning and the night is evening, the fluctuation of sea water during the day is called "tide" and the fluctuation of sea water at night is called "sunseeker".
Low tide refers to the process of sea surface falling during the transition period of high tide and low tide. Low tide is also related to the interaction between the moon and the sun. When the sea level drops to the lowest position, the sea level will be in equilibrium for a short time and the tide will stop.
The ebb and flow of seawater has certain natural laws. There is a way to calculate and master the time of daily tidal fluctuation. Take Qingdao, Shandong Province as an example. There are regular semidiurnal tides in the waters near Qingdao. According to this calculation, each period of tidal activity is 12.4 hours, and there will be two fluctuations in one day. In other words, the daily ebb and flow time is about 0.8 hours later than the previous day. Mastering the law of tidal fluctuation time has brought great convenience to the daily production and life of people in coastal areas.
People's observation of the ebb and flow of the tide sums up two daily high tide formulas: from the first day to the fifteenth day of each month, (lunar date-1)×0.8+5 (points); From 16 to the end of each month is (lunar date-16)×0.8+5(0: 00). Using the above two formulas, we can calculate when is the highest tide in a day, and then deduce that 6.2 hours is the lowest tide, and then the interval of 6.2 hours is the high tide time. Tidal fluctuation time varies from place to place, mainly due to the difference of lunar calendar date, local tidal type and longitude. We can carefully observe the local tidal law and calculate with reference to the above formula, and then we can roughly get the local tidal time.
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