CN111307122A - Prediction method and device for tidal water change - Google Patents
Prediction method and device for tidal water change Download PDFInfo
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Abstract
The embodiment of the invention provides a method and a device for predicting tidal water change, wherein the device calculates a flood tide influence coefficient and a ebb tide influence coefficient, and corrects data of a tide table by using the flood tide influence coefficient and the ebb tide influence coefficient so as to obtain local tidal water change data, and the problem that the tidal water level change is inconsistent with the data of the tide table due to the influence of different regional landforms or hydrological conditions is solved. The embodiment of the invention does not need to measure a large amount of complex data, is simple and convenient to calculate, and is suitable for quickly predicting the short-term tidal water change.
Description
Technical Field
The invention belongs to the field of prediction of tidal water change, and particularly relates to a method and a device for predicting tidal water change.
Background
The tidal phenomenon is a natural phenomenon in coastal areas, and refers to the periodic movement of seawater under the action of the tidal force induced by celestial bodies (mainly the moon and the sun). The tide phenomenon can be regarded as being formed by overlapping a plurality of partial tides of different periods, the tide height at any moment can be expressed as the height of an average sea level on a tide height reference surface, the tide time and the tide height of the high tide and the low tide of a certain point position and the tide height of each hour can be calculated by calculating the tide harmonic constant of the point position, and a daily prediction report form, namely a tide table, is made. The tide level and the tide change trend of the point at any time can be known by inquiring the tide meter.
The tide meter is generally manufactured according to data obtained by a monitoring station of a certain port, so that the data of the tide meter near the monitoring station is relatively accurate, but in a place far away from the monitoring station, the data of the tide meter can only be used as reference due to the influence of factors such as terrain, hydrology and the like of different areas, and the data of local tidal water change can not be directly obtained through the data of the tide meter.
For some short-term projects constructed in coastal areas or tidal river reach, only tidal water level change data during construction needs to be known, if the calculation of the tidal water data which is accurate in some places is very complicated, the calculation of parameters such as frequency, phase angle, intersection point factor, intersection point correcting angle, astronomical initial phase angle, amplitude and slow angle of tide diversion is related, a large amount of historical measurement data is needed as support, and the method is not suitable for quickly predicting the short-term tidal water change.
Disclosure of Invention
The invention aims to provide a method and a device for calculating tidal water change, which solve the problem that the change of tidal water level is inconsistent with the data of a tide table due to the influence of terrain or hydrological conditions of different areas, do not need to measure a large amount of complex data, are simple and convenient to calculate, and are suitable for quickly predicting the short-term tidal water change.
In order to solve the above technical problem, in one aspect, an embodiment of the present invention provides a method for predicting a tidal water change, including:
s1, acquiring data, wherein the data represent tidal water data of the same day, and the data comprise:
local tide reaching time, local tide difference after passing a first set time interval when the tide rises, local tide difference after passing a second set time interval when the tide falls, and tide table data of a port nearest to the local; the tide meter data comprises the time of the highest tide displayed on the current day of the tide meter;
s2, judging whether the time of the highest tide displayed on the current day of the tide table is the same as the local time of reaching the highest tide, if not, adjusting the time of the tide table to be consistent with the local time; wherein tidal water data of the tidal table follows the adjustment of the time;
s3, calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the first time interval according to the tidal table adjusted to be consistent with the local time, and calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the second time interval;
s4, calculating a flood tide influence coefficient according to the tidal range after the local flood tide passes through a first set time interval and the tidal range from the starting time to the ending time of the first time interval of the adjusted tide table;
calculating a tide-fading influence coefficient according to the tide difference after passing through a second set time interval during the tide-fading process and the tide difference from the starting time to the ending time of the second time interval of the adjusted tide table;
and S5, predicting local tide water data according to the tide table and the flood tide influence coefficient or the ebb tide influence coefficient.
Further, the flood tide influence coefficient is determined by the following formula:
wr＝x1/xc1
x1 is the tidal range after the first set time interval when the local tide rises, and xc1 is the tidal range from the start time to the end time of the first time interval of the adjusted tide table.
The ebb factor is determined by the following equation:
wd＝x2/xc2
x2 is the tidal range after a second set time interval when the local tide is back off, and xc2 is the tidal range from the start time to the end time of the second time interval of the adjusted tide schedule.
Further, the tidal range over the locally set time is predicted according to the following equation:
x＝xr*w
x is the tidal range within the local set time, xr is the tidal range within the set time of the tide table, and w is the rising tide influence coefficient or the falling tide influence coefficient.
Further, the method for predicting tidal water change further comprises re-executing S1-S4 according to a preset time interval to update the flood tide influence coefficient and the ebb tide influence coefficient.
Further, whether the time of the highest tide displayed on the current day of the tide table is the same as the local time of reaching the highest tide is judged, if not, the time of the tide table is adjusted to be consistent with the local time, specifically,
if the time of the highest tide displayed on the tide table is N minutes earlier than the local time of reaching the highest tide, the starting time and the ending time of the first set time interval when the local tide rises are advanced by N minutes; the starting time and the ending time of the local deliquescence after the second set time interval are both advanced by N minutes;
if the time of the top tide displayed on the tide table is N minutes later than the local time of reaching the top tide, delaying the start time and the end time of the first set time interval when the local tide rises by N minutes; and delaying the starting time and the ending time of the local deliquescence after the second set time interval for N minutes, wherein N is more than 0.
On the other hand, an embodiment of the present invention further provides a device for predicting tidal water change, including:
a data acquisition module for acquiring data, the data each representing tidal water data for the same day, comprising:
local tide reaching time, local tide difference after passing a first set time interval when the tide rises, local tide difference after passing a second set time interval when the tide falls, and tide table data of a port nearest to the local; the tide meter data comprises the time of the highest tide displayed on the current day of the tide meter;
the judging module is used for judging whether the time of the highest tide displayed on the current day on the tide table is the same as the local time of reaching the highest tide or not, and if not, the time of the tide table is adjusted to be the same as the local time; wherein tidal water data of the tidal table follows the adjustment of the time;
the calculating module is used for calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the first time interval according to the tidal table adjusted to be consistent with the local time, and calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the second time interval;
the calculating module is further used for calculating a flood tide influence coefficient according to the tidal range after the local flood tide passes through a first set time interval and the tidal range from the starting time to the ending time of the first time interval of the adjusted tide table;
the calculating module is further used for calculating a tidal range influence coefficient according to the tidal range after the tidal range passes through a second set time interval during tidal range and the tidal range from the starting time to the ending time of the second time interval after the tidal range is adjusted;
and the prediction module is used for predicting local tide water data according to the tide table and the flood tide influence coefficient or the ebb tide influence coefficient.
Further, the flood tide influence coefficient is determined by the following formula:
wr＝x1/xc1
x1 is the tidal range after the first set time interval when the local tide rises, and xc1 is the tidal range from the start time to the end time of the first time interval of the adjusted tide table.
The ebb factor is determined by the following equation:
wd＝x2/xc2
x2 is the tidal range after a second set time interval when the local tide is back off, and xc2 is the tidal range from the start time to the end time of the second time interval of the adjusted tide schedule.
Further, the tidal range over the locally set time is predicted according to the following equation:
x＝xr*w
x is the tidal range within the local set time, xr is the tidal range within the set time of the tide table, and w is the rising tide influence coefficient or the falling tide influence coefficient.
Furthermore, the prediction device for tidal water change further comprises an updating module, which is used for updating the flood tide influence coefficient and the ebb tide influence coefficient according to a preset time interval.
Further, whether the time of the highest tide displayed on the current day of the tide table is the same as the local time of reaching the highest tide is judged, if not, the time of the tide table is adjusted to be consistent with the local time, specifically,
if the time of the highest tide displayed on the tide table is N minutes earlier than the local time of reaching the highest tide, the starting time and the ending time of the first set time interval when the local tide rises are advanced by N minutes; the starting time and the ending time of the local deliquescence after the second set time interval are both advanced by N minutes;
if the time of the top tide displayed on the tide table is N minutes later than the local time of reaching the top tide, delaying the start time and the end time of the first set time interval when the local tide rises by N minutes; and delaying the starting time and the ending time of the local deliquescence after the second set time interval for N minutes, wherein N is more than 0.
According to the embodiment of the invention, the tide rising influence coefficient and the tide falling influence coefficient are calculated according to the data of the tide table and the data measured in the local area, and the data of the tide table is corrected by utilizing the tide rising influence coefficient and the tide falling influence coefficient, so that the local tide and water change data are obtained, and the problem that the tide level change is inconsistent with the data of the tide table due to the influence of the landform or hydrological conditions in different areas is solved. The embodiment of the invention does not need to measure a large amount of complex data, is simple and convenient to calculate, and is suitable for quickly predicting the short-term tidal water change.
Drawings
Fig. 1 is a schematic diagram of a Guangzhou south Shalingshan island tip revetment provided by an embodiment of the present invention;
FIG. 2 is tidal table data of 10 months and 29 days of the head of a Nansha buffalo provided by an embodiment of the present invention;
fig. 3 is a sum of the height differences between the water level of the lingshan island tip revetment and the point a at 9:00 pm on the same day and 11: a schematic diagram of the height difference between the 00 hour tide level and the point A;
fig. 4 is a schematic structural diagram of a device for predicting a tidal water change according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The term "and/or" refers to and includes any and all possible combinations of one or more of the associated listed items.
The tide tables are generally manufactured according to data obtained from monitoring stations of certain ports, monitored data are close to open sea areas and are slightly influenced by river runoff, and the monitored data are greatly influenced by the river runoff in areas close to estuaries and inland river areas, so that the change of tides in the areas is not completely consistent with the tide tables obtained from the open sea monitoring data. In the short term, the runoff of a river is relatively stable, and its effect can be considered as a relatively stable factor. But the effects of river runoff on flood tide and ebb tide are not exactly the same: the river runoff and the tide rising water flow are opposite in direction in the tide rising process, and the river runoff and the tide falling water flow are in the same direction in the tide falling process. Therefore, the influence of river runoff on the tidal current and the tidal current during the tidal current and the tidal current are required to be calculated respectively, so that the data of the tide table is corrected to obtain the tidal water data of the area.
In one embodiment, the lingshan island tip revetment is as shown in fig. 1:
and setting the base points 1, 2 and 3 as A, B and C respectively, setting the riprap revetment between the BC as a construction range, setting the construction time in the daytime and not constructing at night.
Measured AB 130cm, BC 400cm, the angle of inclination ∠ BCD of the riprap is about 12.5 °, so the height BD of the riprap is sin12.5 × 400 ≈ 87 cm.
It is now necessary to know when the tide water completely covers the stone throwing revetment (i.e. the tide water rises to the basal point 2) and when the tide water completely falls below the range of the stone throwing revetment (i.e. the tide water falls to the basal point 3) during construction time.
Please refer to the method for predicting the tidal water change provided in the embodiment of the present invention, which can rapidly predict the time point when the tidal water completely covers the riprap revetment (i.e. the tidal water rises to the base point 2) and the time point when the tidal water completely falls below the range of the riprap revetment (i.e. the tidal water falls to the base point 3), specifically, the method includes the following steps:
it should be noted that, the step numbers used herein are only for convenience of description and are not used as limitations to the order of execution of the steps.
S1, acquiring data, wherein the data comprises local time (tm) reaching the highest tide, local tidal range x1 after a first set time interval (△ t1) when the tide rises, tidal range x2 after a second set time interval (△ t2) when the tide falls, and tide list data of a port nearest to the local, and the tide list data comprises the time (tmx) of the highest tide displayed on the current day on a tide list;
in the embodiment of the invention, the Guangzhou south Sha Lingshan island tip revetment is taken as the local area, the south Sha buffalo head is taken as the port nearest to the Lingshan island tip revetment, and the tidal water data of 10 months and 29 days is selected.
Tidal table data for the first 10 months and 29 days of south sand buffalo, as shown in fig. 2, is available from fig. 2, with tmx at day 12:27 being one of the climax points, followed by the flood tide period, followed by the ebb tide period.
And (3) adding 9:00 as the start time of the first time interval, 11:00 as the end time of the first time interval, that is, the first time interval is 2 hours, and as shown in fig. 3, the height difference between the water level of the cliff island point revetment at 9:00 o' clock in the morning and the point a is 121 cm; the height difference between the water level of the morning tide at 11:00 and the point A is 22cm, and the height difference is known as 9: 00-11: the tidal range x1 of 00 is 121-22 ═ 99 cm.
By continuously observing the rising tide situation after 11:00 am, it can be obtained that after tmx is 12:27, the local tide level continues to rise, and the water level does not start to drop until tm is 12: 57. It can be seen that tm is 12:57 when the mountain lingshan island tip revetment reaches the climax.
And (3) in a ratio of 14:00 as the start time of the second time interval, 16:00 is taken as the end time of the second time interval, and the measurement is continued, so that the height difference between the water level of the Lingshan island top revetment at 14:00 hours in the afternoon and the point A is 29 cm; if the height difference between the water level of the tide and the point A is 109cm at 16:00 pm, then 14: the tidal range x2 of 00-16:00 is 109-29 ═ 80 cm.
S2, judging whether the time of the highest tide displayed on the current day of the tide table is the same as the local time of reaching the highest tide, if not, adjusting the time of the tide table to be consistent with the local time; wherein the tidal water data of the tidal table follows the adjustment of the time.
Specifically, if the time of the top tide displayed on the tide list is earlier than the local time of reaching the top tide, the time of the tide list corresponding to the start and end times of △ t1 and △ t2 needs to be advanced (tm-tmx), and conversely, the time of the tide list corresponding to the start and end times of △ t1 and △ t2 needs to be delayed (tmx-tm).
According to the step 1, the time tmx of the climax displayed on the current day of the tide table is 12:27, the time tm of the lingshan island tip revetment reaching the climax is 12:57, and it can be seen that the time of the climax displayed on the current day of the tide table is different from the time of the lingshan island tip revetment reaching the climax, and the time of the lingshan island tip revetment reaching the climax is 30min later than the time of the tide table tm-tmx. Namely, the time of the tide watch needs to be adjusted to be consistent with the time of the Lingshan island tip revetment.
That is, for example, the time of the tide table corresponding to the water level of the 9:00 am on the current day of the lingshan island tip revetment should be 8:30, and the time of the tide table corresponding to the water level of the 11:00 am on the current day of the lingshan island tip revetment should be 10: 30. The time of a tide table corresponding to the water level of 14:00 hour tide in the afternoon of the Lingshan island top revetment at the same day is 13: 30; the time of the tide table corresponding to the water level of 16:00 o' clock of the Lingshan island top revetment at afternoon of the same day is 15: 30.
S3, calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the first time interval according to the tidal table adjusted to be consistent with the local time, and calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the second time interval.
From the step 2, the time for the Lingshan island tip revetment to reach the highest tide is 30min later than the tide table, and the time of the tide table corresponding to the water level of the Lingshan island tip revetment at 9:00 morning on the same day is 8: 30; the time of the tide table corresponding to the water level of the 11:00 hour tide on the current morning of the Lingshan island tip revetment is 10: 30. The tide table is searched to obtain that the 8:30 tide height is 95cm, the 10:30 tide height is 197cm, and the tide difference xc1 is 102 cm. Similarly, the time of the tide table corresponding to the 14:00 hour tide water level of the Lingshan island top revetment at the afternoon of the same day is 13: 30; the time of the tide table corresponding to the water level of the tide at 16:00 pm on the local day should be 15: 30. By consulting the tide table, a tide height of 224cm at 13:30, a tide height of 149cm at 15:30 and a tide difference xc2 of 75cm can be obtained.
S4, calculating a flood tide influence coefficient according to the tidal range after the local flood tide passes through a first set time interval and the tidal range from the starting time to the ending time of the first time interval of the adjusted tide table;
and calculating the ebb factor according to the ebb after passing through a second set time interval during ebb and the ebb from the starting time to the ending time of the second time interval in the adjusted tide table.
As shown in step S3, the flood tide influence coefficient wr is x1/xc1 is 99/102 ≈ 0.97; the damping influence coefficient wd is x2/xc2 is 80/75 is approximately equal to 1.07
And S5, predicting local tide water data according to the tide table and the flood tide influence coefficient or the ebb tide influence coefficient.
In the embodiment of the present invention, if the local tidal range within the set time is to be predicted, the tidal range can be predicted according to the following formula:
x＝xr*w
x is the tidal range within the local set time, xr is the tidal range within the set time of the tide table, and w is the rising tide influence coefficient or the falling tide influence coefficient.
In the embodiment of the invention, it is now necessary to know when the tide water completely covers the riprap bank (i.e. the tide water rises to the basal point 2) and when the tide water completely falls below the range of the riprap bank (i.e. the tide water falls to the basal point 3) during the construction time.
As shown in step S1, the height difference between the tidal level and the point a is 121cm when the current day is 9:00 am, i.e., the tidal level is 130 f higher than the point B and 121 is 9cm, and the tidal level corresponding to the tide table is 95 cm. When the tide water just rises to the point B, the tide height corresponding to the tide table is 95- (9/wr) ═ 85.72 cm.
According to the tide table, when the tide height is 85.72cm, the corresponding time is about 8:15, and because the local time reaching the highest tide is 30min later than the tide table tm-tmx, the local time corresponding to the tide table time is adjusted to 8:15+30min to 8: 45. I.e. 8:45 tidal waters in the morning completely cover the riprap revetment (i.e. the tidal waters rise to the basal point 2).
Similarly, the height difference between the tide level and the point A is 109cm when the tide level is 16:00 pm on the same day, namely the tide level is 130-87 + 108cm higher than the point C, and the tide level corresponding to the tide gauge is 149 cm. When the tide level just returns to the point C, the tide height corresponding to the tide table is 149- (108/wd) ═ 48.07 cm. As can be seen from the tide table, the height of the lowest tide in the afternoon is 60cm, the time is 18:40, namely the tide water cannot completely fall below the range of the riprap revetment (namely the tide water cannot fall to the base point 3). Further, it can be calculated that when the tidal range has tidal range yd of 149-60-89 cm from 15: 30-18: 40, the tidal range y of 16: 00-19: 10 is y-yd-wd of 95.23 cm. Namely, when the local 19:10 pm reaches the lowest tide, the local tide level is still 108-95.23 cm higher than the C point, namely 12.77 cm.
According to the embodiment of the invention, the tide rising influence coefficient and the tide falling influence coefficient are calculated according to the data of the tide table and the data measured in the local area, and the data of the tide table is corrected by utilizing the tide rising influence coefficient and the tide falling influence coefficient, so that the local tide and water change data are obtained, and the problem that the tide level change is inconsistent with the data of the tide table due to the influence of the landform or hydrological conditions in different areas is solved. The embodiment of the invention does not need to measure a large amount of complex data, is simple and convenient to calculate, and is suitable for quickly predicting the short-term tidal water change.
Referring to fig. 4, an embodiment of the invention further provides a device for predicting tidal water change, including:
a data acquisition module 11, configured to acquire data, where the data all represent tidal water data of the same day, and the data acquisition module includes:
local tide reaching time, local tide difference after passing a first set time interval when the tide rises, local tide difference after passing a second set time interval when the tide falls, and tide table data of a port nearest to the local; the tide meter data comprises the time of the highest tide displayed on the current day of the tide meter;
the judging module 12 is used for judging whether the time of the highest tide displayed on the current day on the tide table is the same as the local time of reaching the highest tide, and if not, adjusting the time of the tide table to be the same as the local time; wherein tidal water data of the tidal table follows the adjustment of the time;
a calculating module 13, configured to calculate a tidal range of the adjusted tidal table from the start time to the end time of the first time interval according to the tidal table adjusted to be consistent with the local time, and calculate a tidal range of the adjusted tidal table from the start time to the end time of the second time interval;
the calculating module 13 is further configured to calculate a flood tide influence coefficient according to the tidal range after the local flood tide passes through the first set time interval and the tidal range from the start time to the end time of the first time interval of the adjusted tide table;
the calculating module 13 is further configured to calculate a tidal range influence coefficient according to the tidal range after the tidal range passes through the second set time interval during tidal range and the tidal range from the start time to the end time of the second time interval of the adjusted tidal table;
and the prediction module is used for predicting local tide water data according to the tide table and the flood tide influence coefficient or the ebb tide influence coefficient.
In one preferred embodiment, the flood tide influence coefficient is determined by the following formula:
wr＝x1/xc1
x1 is the tidal range after the first set time interval when the local tide rises, and xc1 is the tidal range from the start time to the end time of the first time interval of the adjusted tide table.
The ebb factor is determined by the following equation:
wd＝x2/xc2
x2 is the tidal range after a second set time interval when the local tide is back off, and xc2 is the tidal range from the start time to the end time of the second time interval of the adjusted tide schedule.
In one preferred embodiment, the tidal difference over the set time is predicted according to the following equation:
x＝xr*w
x is the tidal range within the local set time, xr is the tidal range within the set time of the tide table, and w is the rising tide influence coefficient or the falling tide influence coefficient.
In a preferred embodiment, the tidal water change prediction apparatus further includes an updating module, configured to update the flood tide influence coefficient and the ebb tide influence coefficient according to a preset time interval.
In one preferred embodiment, the predetermined time interval is one month.
In one preferred embodiment, the time of the highest tide displayed on the current day of the tide table is judged to be the same as the local time of reaching the highest tide, if not, the time of the tide table is adjusted to be consistent with the local time, specifically,
if the time of the highest tide displayed on the tide table is N minutes earlier than the local time of reaching the highest tide, the starting time and the ending time of the first set time interval when the local tide rises are advanced by N minutes; the starting time and the ending time of the local deliquescence after the second set time interval are both advanced by N minutes;
if the time of the top tide displayed on the tide table is N minutes later than the local time of reaching the top tide, delaying the start time and the end time of the first set time interval when the local tide rises by N minutes; and delaying the starting time and the ending time of the local deliquescence after the second set time interval for N minutes, wherein N is more than 0.
It should be noted that the embodiment of the present invention is an embodiment of an apparatus corresponding to any one of the foregoing methods for predicting a tidal water change, and therefore, the embodiment of the present invention is not described in detail herein.
According to the embodiment of the invention, the tidal fluctuation influence coefficient and the ebb influence coefficient are calculated, and the data of the tide table are corrected by utilizing the tidal fluctuation influence coefficient and the ebb influence coefficient, so that local tidal water change data are obtained, and the problem that the tidal water level change is inconsistent with the data of the tide table due to the influence of different regional landforms or hydrological conditions is solved. The embodiment of the invention does not need to measure a large amount of complex data, is simple and convenient to calculate, and is suitable for quickly predicting the short-term tidal water change.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A method for predicting tidal water changes, comprising:
s1, acquiring data, wherein the data represent tidal water data of the same day, and the data comprise:
local tide reaching time, local tide difference after passing a first set time interval when the tide rises, local tide difference after passing a second set time interval when the tide falls, and tide table data of a port nearest to the local; the tide meter data comprises the time of the highest tide displayed on the current day of the tide meter;
s2, judging whether the time of the highest tide displayed on the current day of the tide table is the same as the local time of reaching the highest tide, if not, adjusting the time of the tide table to be consistent with the local time; wherein tidal water data of the tidal table follows the adjustment of the time;
s3, calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the first time interval according to the tidal table adjusted to be consistent with the local time, and calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the second time interval;
s4, calculating a flood tide influence coefficient according to the tidal range after the local flood tide passes through a first set time interval and the tidal range from the starting time to the ending time of the first time interval of the adjusted tide table;
calculating a tide-fading influence coefficient according to the tide difference after passing through a second set time interval during the tide-fading process and the tide difference from the starting time to the ending time of the second time interval of the adjusted tide table;
and S5, predicting local tide water data according to the tide table and the flood tide influence coefficient or the ebb tide influence coefficient.
2. The method of predicting tidal water change of claim 1, wherein the flood tide influence coefficient is determined by the following equation:
wr＝x1/xc1
x1 is the tidal range after the first set time interval when the local tide rises, and xc1 is the tidal range from the start time to the end time of the first time interval of the adjusted tide table.
The ebb factor is determined by the following equation:
wd＝x2/xc2
x2 is the tidal range after a second set time interval when the local tide is back off, and xc2 is the tidal range from the start time to the end time of the second time interval of the adjusted tide schedule.
3. The method of predicting tidal water change of claim 2, wherein the tidal difference within the local set time is predicted according to the following formula:
x＝xr*w
x is the tidal range within the local set time, xr is the tidal range within the set time of the tide table, and w is the rising tide influence coefficient or the falling tide influence coefficient.
4. The method of predicting tidal water changes of any of claims 1-3, further comprising:
re-executing S1-S4 according to a preset time interval to update the flood tide influence coefficient and the ebb tide influence coefficient,
5. the method of claim 4, wherein the time of the tidal grade displayed on the current day of the tide table is determined to be the same as the local time of the tidal grade, and if not, the time of the tide table is adjusted to be the same as the local time,
if the time of the highest tide displayed on the tide table is N minutes earlier than the local time of reaching the highest tide, the starting time and the ending time of the first set time interval when the local tide rises are advanced by N minutes; the starting time and the ending time of the local deliquescence after the second set time interval are both advanced by N minutes;
if the time of the top tide displayed on the tide table is N minutes later than the local time of reaching the top tide, delaying the start time and the end time of the first set time interval when the local tide rises by N minutes; and delaying the starting time and the ending time of the local deliquescence after the second set time interval for N minutes, wherein N is more than 0.
6. An apparatus for predicting tidal water change, comprising:
a data acquisition module for acquiring data, the data each representing tidal water data for the same day, comprising:
local tide reaching time, local tide difference after passing a first set time interval when the tide rises, local tide difference after passing a second set time interval when the tide falls, and tide table data of a port nearest to the local; the tide meter data comprises the time of the highest tide displayed on the current day of the tide meter;
the judging module is used for judging whether the time of the highest tide displayed on the current day on the tide table is the same as the local time of reaching the highest tide or not, and if not, the time of the tide table is adjusted to be the same as the local time; wherein tidal water data of the tidal table follows the adjustment of the time;
the calculating module is used for calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the first time interval according to the tidal table adjusted to be consistent with the local time, and calculating the tidal range of the adjusted tidal table from the starting time to the ending time of the second time interval;
the calculating module is further used for calculating a flood tide influence coefficient according to the tidal range after the local flood tide passes through a first set time interval and the tidal range from the starting time to the ending time of the first time interval of the adjusted tide table;
the calculating module is further used for calculating a tidal range influence coefficient according to the tidal range after the tidal range passes through a second set time interval during tidal range and the tidal range from the starting time to the ending time of the second time interval after the tidal range is adjusted;
and the prediction module is used for predicting local tide water data according to the tide table and the flood tide influence coefficient or the ebb tide influence coefficient.
7. The tidal water change prediction device of claim 6, wherein the flood tide influence coefficient is determined by the following equation:
wr＝x1/xc1
x1 is the tidal range after the first set time interval when the local tide rises, and xc1 is the tidal range from the start time to the end time of the first time interval of the adjusted tide table.
The ebb factor is determined by the following equation:
wd＝x2/xc2
x2 is the tidal range after a second set time interval when the local tide is back off, and xc2 is the tidal range from the start time to the end time of the second time interval of the adjusted tide schedule.
8. The tidal water change prediction device of claim 7, wherein the tidal difference over a locally set time is predicted according to the following equation:
x＝xr*w
x is the tidal range within the local set time, xr is the tidal range within the set time of the tide table, and w is the rising tide influence coefficient or the falling tide influence coefficient.
9. The tidal water change prediction device of any one of claims 6-8, further comprising an update module for updating the flood tide influence coefficient and the ebb tide influence coefficient according to a preset time interval.
10. The tidal water change prediction device of claim 9, wherein the device determines whether the time of the top tide displayed on the tide table on the current day is the same as the local time of the top tide, and if not, adjusts the time of the tide table to be the same as the local time, specifically,
if the time of the highest tide displayed on the tide table is N minutes earlier than the local time of reaching the highest tide, the starting time and the ending time of the first set time interval when the local tide rises are advanced by N minutes; the starting time and the ending time of the local deliquescence after the second set time interval are both advanced by N minutes;
if the time of the climax displayed on the tide table is N minutes later than the local time of reaching the climax
If the local tide rises, the starting time and the ending time of the first set time interval are delayed by N minutes; and delaying the starting time and the ending time of the local deliquescence after the second set time interval for N minutes, wherein N is more than 0.
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