A method and system for predicting flow velocity distribution in hydrological monitoring

Abstract

This application provides a method and system for predicting hydrological flow velocity distribution, relating to the field of data processing technology for prediction purposes. The method includes: acquiring historical flow velocities in a first fixed-point area and a second fixed-point area at a first historical fixed-point time, as well as a first flow velocity fitting curve at the first historical fixed-point time; acquiring the flow velocity in the first fixed-point area and the second fixed-point area at the current time; acquiring a first difference between the flow velocity in the first fixed-point area at the current time and the flow velocity in the first fixed-point area at the first historical fixed-point time, and a second difference between the flow velocity in the second fixed-point area at the current time and the flow velocity in the second fixed-point area at the first historical fixed-point time. This application provides a method and system for predicting hydrological flow velocity distribution, which can monitor the overall environment through prediction, reducing the input of manpower and resources.

Description

Technical Field

[0001] This application relates to the field of data processing technology for prediction purposes, specifically to a method and system for predicting flow velocity distribution in hydrological monitoring. Background Technology

[0002] The hydrological monitoring system is suitable for hydrological departments to conduct real-time monitoring of hydrological parameters such as those of rivers, lakes, reservoirs, canals, and groundwater. Monitoring data includes: water level, flow rate, flow velocity, rainfall (snow), evaporation, sediment, ice formation, soil moisture, and water quality. The system uses wireless communication to transmit monitoring data in real time, which can greatly improve the work efficiency of hydrological departments.

[0003] Currently, hydrological monitoring is mainly conducted through observation, which involves monitoring the overall environment. This requires not only a large number of monitoring devices but also a significant amount of manpower to assist in monitoring and ensure that more comprehensive environmental parameters can be obtained. However, this method requires a great deal of human and material resources. Summary of the Invention

[0004] This application provides a method and system for predicting hydrological flow velocity distribution, which can monitor the overall environment through prediction and reduce the input of manpower and material resources.

[0005] The specific technical solution of this embodiment is as follows:

[0006] On the one hand, embodiments of this application provide a method for predicting hydrological monitoring flow velocity distribution, including:

[0007] Obtain the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region at the first historical fixed-point time, as well as the first flow velocity fitting curve at the first historical fixed-point time;

[0008] Get the flow velocity of the first fixed-point region and the flow velocity of the second fixed-point region at the current time;

[0009] Get the first difference between the flow velocity of the first fixed point region at the current time and the flow velocity of the first fixed point region at the first historical fixed point time, and the second difference between the flow velocity of the second fixed point region at the current time and the flow velocity of the second fixed point region at the first historical fixed point time;

[0010] Determine whether the relative difference between the first difference and the second difference is within a preset range;

[0011] If the relative difference between the first difference and the second difference is determined to be within a preset range, the flow velocity in other regions at the current time is predicted based on the first flow velocity fitting curve.

[0012] In some embodiments, when it is determined that the relative difference between the first difference and the second difference is not within a preset range, the following steps are performed:

[0013] Obtain the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region at the second historical fixed-point time, as well as the fitted curve of the second flow velocity at the second historical fixed-point time;

[0014] Get the third difference between the flow velocity of the first fixed-point region at the current time and the flow velocity of the first fixed-point region at the second historical fixed-point time, and the fourth difference between the flow velocity of the second fixed-point region at the current time and the flow velocity of the second fixed-point region at the second historical fixed-point time.

[0015] Based on the ratio of the first difference to the third difference, or the ratio of the second difference to the fourth difference, and the first and second flow velocity fitting curves, a correction operation is performed to obtain the first reference fitting curve.

[0016] Based on the first reference fitted curve, the flow velocity in other regions at the current time is predicted.

[0017] In some embodiments, when corrections are made based on the ratio of the first difference to the third difference, and the first and second flow velocity fitting curves, the first reference fitting curve is obtained as follows:

[0018] The ratio of the first difference to the third difference is A. The distance between the flow velocity of the first reference fitted curve in any specified region and the flow velocity of the first flow velocity fitted curve in the corresponding region is B. The distance between the flow velocity of the first reference fitted curve in any specified region and the flow velocity of the second flow velocity fitted curve in the corresponding region is C. Then B / C=A.

[0019] In some embodiments, after obtaining the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region at the second historical fixed-point time, and the second flow velocity fitting curve at the second historical fixed-point time, before obtaining the third difference between the flow velocity of the first fixed-point region at the current time and the flow velocity of the first fixed-point region at the second historical fixed-point time, and before obtaining the fourth difference between the flow velocity of the second fixed-point region at the current time and the flow velocity of the second fixed-point region at the second historical fixed-point time, the following steps are further included:

[0020] Determine whether the fitting curves for the first and second flow velocities overlap.

[0021] If the first velocity fitting curve and the second velocity fitting curve are determined to overlap, the subsequent steps are stopped, the first velocity fitting curve is translated to obtain the second reference fitting curve, the translation amount is the relative difference between the first difference and the second difference, and the velocity of other regions at the current time is predicted based on the second reference fitting curve.

[0022] If it is determined that the first velocity fitting curve and the second velocity fitting curve do not overlap, then continue with the subsequent steps.

[0023] In some embodiments, when it is determined that the relative difference between the first difference and the second difference is not within a preset range, the following steps are performed:

[0024] Obtain the second flow velocity fitting curve at the second historical fixed time point;

[0025] Based on the first and second velocity fitting curves, the velocity points in each region are sampled at the center, and a third reference fitting curve is obtained based on the multiple re-sampled points.

[0026] Based on the third reference fitted curve, the flow velocity in other regions at the current time is predicted.

[0027] In some embodiments, the time difference between the current time, the first historical fixed point time, and the second historical fixed point time is an integer multiple of one year.

[0028] In some embodiments, the first historical fixed time is closer to the current time than the second historical fixed time.

[0029] In some embodiments, the time difference between the current time, the first historical fixed point time, and the second historical fixed point time is one year.

[0030] On the other hand, this application provides a hydrological monitoring flow velocity distribution prediction system, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the hydrological monitoring flow velocity distribution prediction method described in any of the above embodiments.

[0031] Compared with the prior art, the embodiments of this application have the following beneficial effects:

[0032] The hydrological monitoring flow velocity distribution prediction method provided in this application obtains the historical flow velocity of a first fixed-point area, the historical flow velocity of a second fixed-point area, and the first flow velocity fitting curve at the first historical fixed-point time at a first historical fixed-point time. It then obtains the flow velocity of the first fixed-point area and the flow velocity of the second fixed-point area at the current time. The method compares the first difference between the flow velocity of the first fixed-point area at the current time and the flow velocity at the first historical fixed-point time with the second difference between the flow velocity of the second fixed-point area at the current time and the flow velocity at the second historical fixed-point time. This determines whether the current overall environment is close to the environment at the first historical fixed-point time. If it is determined to be close, the flow velocity of all areas at the current time is predicted using the first flow velocity fitting curve at the first historical fixed-point time. This reduces the operation of flow velocity detection devices and the amount of data generated, thereby reducing the need for manual monitoring and achieving the goal of reducing the input of manpower and resources. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a flowchart illustrating a hydrological monitoring flow velocity distribution prediction method provided in some embodiments of this application;

[0035] Figure 2 This is a flowchart illustrating a hydrological monitoring flow velocity distribution prediction method provided in other embodiments of this application;

[0036] Figure 3 This is a schematic diagram illustrating the generation of a third reference fitting curve for a hydrological monitoring flow velocity distribution prediction method provided in other embodiments of this application. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] The use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0040] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0041] On the one hand, embodiments of this application provide a method for predicting hydrological monitoring flow velocity distribution; please refer to [link to relevant documentation]. Figure 1 , Figure 1 This is a flowchart illustrating a hydrological monitoring flow velocity distribution prediction method provided in some embodiments of this application, including the following steps:

[0042] S10. Obtain the historical flow velocity of the first fixed-point area and the historical flow velocity of the second fixed-point area at the first historical fixed-point time, as well as the first flow velocity fitting curve at the first historical fixed-point time.

[0043] Historical databases typically contain multiple sets of data at fixed historical time points. Each set contains historical flow velocity data for multiple regions. These historical flow velocity data together form a flow velocity fitting curve, which can be created using existing technologies. For example, the curve can be generated based on discrete points, either in order from upstream to downstream, or in order of distance from the measurement station, or in order of flow velocity detector number. The generated fitting curve usually includes flow velocity data for multiple regions at the same fixed time point.

[0044] For multiple different historical fixed-point times, there may be multiple corresponding flow velocity fitting curves. The historical fixed-point time can be one day, one week, or one year away from the current time, or it can be several days, several weeks, or several years away.

[0045] The first and second fixed-point areas can be any designated areas. Operators can select relatively representative areas based on their experience.

[0046] In the above steps, once the first historical fixed-point time is determined, when calling the historical database, the historical flow velocity of the first fixed-point area and the historical flow velocity of the second fixed-point area, as well as the first flow velocity fitting curve under the first historical fixed-point time, are also determined.

[0047] S20. Obtain the flow velocity of the first fixed-point area and the flow velocity of the second fixed-point area at the current time. Based on the flow velocity detection device, detect the flow velocity of the first fixed-point area and the second fixed-point area, and keep the detected data for later use.

[0048] S30. Obtain the first difference between the flow velocity of the first fixed-point region at the current time and the flow velocity of the first fixed-point region at the first historical fixed-point time, and the second difference between the flow velocity of the second fixed-point region at the current time and the flow velocity of the second fixed-point region at the first historical fixed-point time.

[0049] Under normal circumstances, at a specific historical fixed time, the differences between different regions are correlated, and the differences within the same region are relatively equivalent at different historical fixed times. For example, at the first historical fixed time, if the difference between the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region is 'a', then at the second historical fixed time, the difference between the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region will approach 'a' (i.e., the relative difference between the difference and the value of 'a' is within a certain range).

[0050] S40. Determine whether the relative difference between the first difference and the second difference is within a preset range. The preset range can be obtained based on experience or simulation by existing software; select a range value that conforms to most common situations.

[0051] S50. When the relative difference between the first difference and the second difference is determined to be within a preset range, the flow velocity in other regions at the current time is predicted based on the first flow velocity fitting curve. The relative difference between the first difference and the second difference is the absolute value of the difference between the two differences. When the relative difference is within the preset range, it can be determined that the overall flow velocity at the current time is stable and fits the first flow velocity fitting curve at the first historical fixed time. Therefore, the first flow velocity fitting curve can be used to predict the flow velocity in other regions at the current time to obtain the overall flow velocity prediction result.

[0052] It should be noted that there is no specific order between steps S10 and S20; they can be performed sequentially or simultaneously.

[0053] In the above embodiments, by acquiring the historical flow velocity of the first fixed-point area, the historical flow velocity of the second fixed-point area, and the first flow velocity fitting curve at the first historical fixed-point time, and continuing to acquire the flow velocity of the first fixed-point area and the flow velocity of the second fixed-point area at the current time, and comparing the first difference between the flow velocity of the first fixed-point area at the current time and the flow velocity at the first historical fixed-point time with the second difference between the flow velocity of the second fixed-point area at the current time and the flow velocity at the second historical fixed-point time, it is determined whether the overall environment at the current time is close to the environment at the first historical fixed-point time. When it is determined that it is close to the environment at the first historical fixed-point time, the flow velocity of all areas at the current time is predicted by the first flow velocity fitting curve at the first historical fixed-point time, thereby reducing the operation of flow velocity detection devices and the amount of data generated, thereby reducing the need for manual auxiliary monitoring and achieving the goal of reducing the input of manpower and material resources.

[0054] In some of these embodiments, please refer to Figure 2 , Figure 2 This is a flowchart illustrating a hydrological monitoring flow velocity distribution prediction method provided in some embodiments of this application. After step S40, which determines whether the relative difference between the first difference and the second difference is within a preset range, if it is determined that the relative difference between the first difference and the second difference is not within the preset range, the following steps are continued:

[0055] S60. Obtain the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region at the second historical fixed-point time, as well as the fitted curve of the second flow velocity at the second historical fixed-point time.

[0056] The second historical fixed point time is a different historical time from the first historical fixed point time, and based on the database, there are historical flow velocities in multiple regions. Therefore, after the second historical fixed point time is determined, the historical flow velocity of the first fixed point region, the historical flow velocity of the second fixed point region, and the second flow velocity fitting curve under the second historical fixed point time are also determined.

[0057] The second historical fixed time can be before or after the first historical fixed time. The intervals between the second historical fixed time, the first historical fixed time, and the current time can be the same or different.

[0058] It should be noted that steps S60 and S50 are not necessarily related; they are simply different processing methods for different results obtained from step S40.

[0059] S70. Obtain the third difference between the flow velocity of the first fixed-point region at the current time and the flow velocity of the first fixed-point region at the second historical fixed-point time, and the fourth difference between the flow velocity of the second fixed-point region at the current time and the flow velocity of the second fixed-point region at the second historical fixed-point time.

[0060] Similar to step S30, the absolute value of the difference between the flow velocity of the first fixed-point region at the current time and the flow velocity of the first fixed-point region at the second historical fixed-point time is the third difference. The first, second, and fourth differences are all obtained in this way.

[0061] S80. Based on the ratio of the first difference to the third difference, or the ratio of the second difference to the fourth difference, and the first flow velocity fitting curve and the second flow velocity fitting curve, a correction operation is performed to obtain the first reference fitting curve.

[0062] Because the fitted curve represents the flow velocity values ​​covering most areas, the specific flow velocity values ​​may have different offsets at different historical fixed times in different areas. Therefore, the ratios of the first and third differences, and the second and fourth differences, can be the same or different. When the ratios are the same, a correction operation can be performed based on the first and second flow velocity fitted curves to obtain the first reference fitted curve. The first reference fitted curve differs from the first and second flow velocity fitted curves and better reflects the flow velocity patterns of all areas at the current time. When the ratios are different, a correction operation can be performed based on the ratio of the first and third differences, or the ratio of the second and fourth differences, to obtain the first reference fitted curve. The specific choice can be a larger or smaller value depending on the situation. For example, in areas with high security requirements, a larger ratio can be chosen when more accurate predictions are needed.

[0063] S90. Based on the first reference fitted curve, predict the flow velocity in other regions at the current time.

[0064] In the above embodiments, when the relative difference between the first difference and the second difference is not within a preset range, it can be considered that the actual situation at the current time does not closely match the historical situation at the first historical fixed point time. In this case, using the first velocity fitting curve at the first historical fixed point time to predict the velocity of multiple regions at the current time will result in a significant deviation. Therefore, this embodiment introduces the velocity of the first fixed point region, the velocity of the second fixed point region, and the second velocity fitting curve at the second historical fixed point time. Based on the ratio of the first difference to the third difference, or the ratio of the second difference to the fourth difference, and based on both the first and second velocity fitting curves, a correction process is performed to obtain a first reference fitting curve. Predicting the velocity of different regions at the current time based on this first reference fitting curve yields a more accurate prediction result.

[0065] In some embodiments, the step of S80, which involves performing a correction operation based on the ratio of the first difference to the third difference, or the ratio of the second difference to the fourth difference, and the first and second flow velocity fitting curves to obtain the first reference fitting curve, may specifically include the following steps:

[0066] S801. For ease of explanation, let's use the ratio of the first difference to the third difference as A. The first reference fitting curve is generated in the following way: the distance (coordinate distance) between the flow velocity of the first reference fitting curve in any specified region and the flow velocity of the first flow velocity fitting curve in the corresponding region is B; the distance between the flow velocity of the first reference fitting curve in the corresponding region and the flow velocity of the second flow velocity fitting curve in the corresponding region is C. Then C / B=A.

[0067] For ease of explanation, a specific example is given below. When the ratio of the first difference to the third difference is 2, a specific region is specified sequentially. Within that specified region, there are specific values ​​for the first and second flow velocity fitting curves. The first flow velocity fitting curve is shifted toward the second flow velocity fitting curve, or the second flow velocity fitting curve is shifted toward the first flow velocity fitting curve, until the flow velocity value of the first reference fitting curve in the specified region satisfies the following condition: the distance to the first flow velocity fitting curve is B, the distance to the second flow velocity fitting curve is C, and C / B = A.

[0068] Similarly, the ratio of the second difference to the fourth difference, as well as the first and second flow velocity fitting curves, can be used to correct the first reference fitting curve. The specific steps are similar to those in step S801 above, and will not be repeated here.

[0069] In the above embodiments, the ratio of the first difference to the third difference is used as a reference. At the same time, the distance between the flow velocity of the first reference fitting curve in any specified region and the flow velocity of the first velocity fitting curve in the corresponding region, and the distance between the flow velocity of the first reference fitting curve in any specified region and the flow velocity of the second velocity fitting curve in the corresponding region are referenced to perform a correction operation, thereby obtaining the first reference fitting curve. Based on the first reference fitting curve, the flow velocity in different regions at the current time is predicted, which can have a more accurate prediction effect.

[0070] In some embodiments, after step S60, obtaining the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region at the second historical fixed-point time, and before step S70, obtaining the second flow velocity fitting curve at the second historical fixed-point time, obtaining the third difference between the flow velocity of the first fixed-point region at the current time and the flow velocity of the first fixed-point region at the second historical fixed-point time, and before obtaining the fourth difference between the flow velocity of the second fixed-point region at the current time and the flow velocity of the second fixed-point region at the second historical fixed-point time, the following steps are further included:

[0071] K10. Determine whether the first velocity fitting curve and the second velocity fitting curve overlap.

[0072] In the above steps, the overlap between the first and second flow velocity fitting curves indicates that the flow velocities in various regions of the current environment tend to be consistent and have little variability.

[0073] K20. When it is determined that the first velocity fitting curve and the second velocity fitting curve overlap, the subsequent steps S70 (and thereafter) are stopped. The first velocity fitting curve (second velocity fitting curve) is directly translated to obtain the second reference fitting curve. The translation amount is the relative difference between the first difference and the second difference. Based on the second reference fitting curve, the velocity of other regions at the current time is predicted.

[0074] In the above steps, when the first flow velocity fitting curve and the second flow velocity fitting curve overlap, it means that the flow velocity in various regions of the current environment tends to be consistent and the variability is small. At this time, a compensation method can be used, that is, the first flow velocity fitting curve or the second flow velocity fitting curve is corrected by the relative difference between the first difference and the second difference to obtain the second reference fitting curve. Then, the flow velocity in other regions at the current time is predicted based on the second reference fitting curve.

[0075] K30. If it is determined that the first velocity fitting curve and the second velocity fitting curve do not overlap, then continue with the subsequent steps.

[0076] In the above embodiments, when the first flow velocity fitting curve overlaps with the second flow velocity fitting curve, it can be considered that the flow velocity in each region of the current environment tends to be consistent and the variability is small. At this time, by a simple correction operation, a second reference fitting curve can be obtained, which can simplify the correction process, improve the overall prediction efficiency, and further improve the robustness of the system.

[0077] In other embodiments, please refer to Figure 3 , Figure 3 This is a schematic diagram of the generation of the third reference fitting curve in the hydrological monitoring flow velocity distribution prediction method provided in other embodiments of this application. After step S40, which determines whether the relative difference between the first difference and the second difference is within a preset range, if it is determined that the relative difference between the first difference and the second difference is not within a preset range, the following steps are continued:

[0078] T10. Obtain the second flow velocity fitting curve at the second historical fixed point time.

[0079] T20. Based on the first and second velocity fitting curves, the velocity points in each region are sampled at the center. Based on the multiple re-sampled points, a third reference fitting curve is obtained.

[0080] T30. Based on the third reference fitting curve, predict the flow velocity in other regions at the current time.

[0081] With the settings of the above embodiments, a correction operation can be performed based on the first and second flow velocity fitting curves to obtain a third reference fitting curve, and the flow velocity in other regions at the current time can be predicted using the third reference fitting curve to improve the accuracy of the prediction.

[0082] In some embodiments, the time difference between the current time, the first historical fixed point time, and the second historical fixed point time is an integer multiple of one year.

[0083] With the settings of the above embodiments, the first historical fixed time and the second historical fixed time are in the same season as the current time, and the overall flow velocity of the environment can be more closely matched, thereby achieving better prediction results.

[0084] In some embodiments, the first historical fixed time is closer to the current time than the second historical fixed time.

[0085] In the above embodiments, the overall flow velocity of the environment gradually changes over time. During this change, the changes between adjacent time points are smaller. Therefore, in these embodiments, using a first historical fixed-point time, which is closer to the current time, as the basis for prediction, allows for better prediction of flow velocity in various regions at the current time, resulting in better prediction performance. Then, when the relative difference between the first and second differences is outside a preset range, a second historical fixed-point time, which is also closer to the current time, is introduced to correct the flow velocity fitting curve, obtaining a reference fitting curve. This curve is then used to predict the flow velocity in other regions at the current time, thereby improving the prediction effect.

[0086] In some embodiments, the time difference between the current time, the first historical fixed point time, and the second historical fixed point time is one year.

[0087] In the above embodiments, taking the example where the first historical fixed-point time is closer to the current time than the second historical fixed-point time, the first historical fixed-point time is 1 year away from the current time, and the second historical fixed-point time is 2 years away from the current time. Using the historical fixed-point time that is closer to the current time, compared to a longer interval, can better make the environment of the collected historical fixed-point time more closely match the current time, thereby further improving the prediction effect of various regions at the current time.

[0088] On the other hand, this application provides a hydrological monitoring flow velocity distribution prediction system, including a memory and a processor. The memory stores a computer program, and the processor executes the computer program to implement the hydrological monitoring flow velocity distribution prediction method described in any of the above embodiments.

[0089] This application also provides a computer medium storing a computer program, which is executed to implement the hydrological monitoring flow velocity distribution prediction method described in any of the above embodiments.

[0090] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for predicting flow velocity distribution in hydrological monitoring, characterized in that, include: Obtain the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region at the first historical fixed-point time, as well as the first flow velocity fitting curve at the first historical fixed-point time; Get the flow velocity of the first fixed-point region and the flow velocity of the second fixed-point region at the current time; Get the first difference between the flow velocity of the first fixed point region at the current time and the flow velocity of the first fixed point region at the first historical fixed point time, and the second difference between the flow velocity of the second fixed point region at the current time and the flow velocity of the second fixed point region at the first historical fixed point time; Determine whether the relative difference between the first difference and the second difference is within a preset range; If the relative difference between the first difference and the second difference is within a preset range, the flow velocity in other regions at the current time is predicted based on the first flow velocity fitting curve. If the relative difference between the first difference and the second difference is determined to be outside the preset range, continue with the following steps: Obtain the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region at the second historical fixed-point time, as well as the fitted curve of the second flow velocity at the second historical fixed-point time; Get the third difference between the flow velocity of the first fixed-point region at the current time and the flow velocity of the first fixed-point region at the second historical fixed-point time, and the fourth difference between the flow velocity of the second fixed-point region at the current time and the flow velocity of the second fixed-point region at the second historical fixed-point time. Based on the ratio of the first difference to the third difference, or the ratio of the second difference to the fourth difference, and the first and second flow velocity fitting curves, a correction operation is performed to obtain the first reference fitting curve. Based on the first reference fitted curve, the flow velocity in other regions at the current time is predicted.

2. The hydrological monitoring flow velocity distribution prediction method as described in claim 1, characterized in that, When corrections are made based on the ratio of the first difference to the third difference, and the first and second flow velocity fitting curves, the first reference fitting curve is obtained, including: The ratio of the first difference to the third difference is A. The distance between the flow velocity of the first reference fitted curve in any specified region and the flow velocity of the first flow velocity fitted curve in the corresponding region is B. The distance between the flow velocity of the first reference fitted curve in any specified region and the flow velocity of the second flow velocity fitted curve in the corresponding region is C. Then B / C=A.

3. The hydrological monitoring flow velocity distribution prediction method as described in claim 1, characterized in that, After obtaining the historical flow velocity of the first fixed-point region and the historical flow velocity of the second fixed-point region at the second historical fixed-point time, and the fitted curve of the second flow velocity at the second historical fixed-point time, before obtaining the third difference between the flow velocity of the first fixed-point region at the current time and the flow velocity of the first fixed-point region at the second historical fixed-point time, and before obtaining the fourth difference between the flow velocity of the second fixed-point region at the current time and the flow velocity of the second fixed-point region at the second historical fixed-point time, the following steps are also included: Determine whether the fitting curves for the first and second flow velocities overlap. If the first velocity fitting curve and the second velocity fitting curve are determined to overlap, the subsequent steps are stopped, the first velocity fitting curve is translated to obtain the second reference fitting curve, the translation amount is the relative difference between the first difference and the second difference, and the velocity of other regions at the current time is predicted based on the second reference fitting curve. If it is determined that the first velocity fitting curve and the second velocity fitting curve do not overlap, then continue with the subsequent steps.

4. The hydrological monitoring flow velocity distribution prediction method as described in claim 1, characterized in that, If the relative difference between the first difference and the second difference is determined to be outside the preset range, continue with the following steps: Obtain the second flow velocity fitting curve at the second historical fixed time point; Based on the first and second velocity fitting curves, the velocity points in each region are sampled at the center, and a third reference fitting curve is obtained based on the multiple re-sampled points. Based on the third reference fitted curve, the flow velocity in other regions at the current time is predicted.

5. The hydrological monitoring flow velocity distribution prediction method according to any one of claims 1-4, characterized in that, The time difference between the current time, the first historical fixed point time, and the second historical fixed point time is an integer multiple of one year.

6. The hydrological monitoring flow velocity distribution prediction method according to any one of claims 1-4, characterized in that, The first historical fixed time is closer to the current time than the second historical fixed time.

7. The hydrological monitoring flow velocity distribution prediction method as described in claim 6, characterized in that, The time difference between the current time, the first historical fixed point time, and the second historical fixed point time is one year.

8. A hydrological monitoring and flow velocity distribution prediction system, characterized in that, The method includes a memory and a processor, wherein the memory stores a computer program and the processor executes the computer program to implement the hydrological monitoring flow velocity distribution prediction method according to any one of claims 1-7.

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