Rapid flow testing method and system for large-flow river channel

Abstract

The invention provides a rapid flow testing method and system for a large-flow river channel. The method comprises the steps that the sectional area of the large-flow river channel at all water levels is measured through a total station; measuring the average flow velocity of the large-flow river channel at each water level by using an acoustic Doppler flow velocity profiler; determining a water level-flow curve of the high-flow river channel according to the sectional area of the high-flow river channel at each water level and the average flow velocity at each water level; and acquiring the water level at a to-be-tested moment, searching the flow corresponding to the water level at the to-be-tested moment in the water level-flow curve, and taking the flow as the flow at the to-be-tested moment. According to the technical scheme, the accuracy is high, the flow calculation process is simplified, and the response speed of flow measurement is increased.

Description

Technical Field

[0001] The present application relates to the technical field of river flow measurement, and in particular to a method and system for rapid flow measurement in large-flow rivers. Background Art

[0002] In the fields of water conservancy projects and hydrological monitoring, accurate measurement of river flow is crucial for water resource management, flood prevention and disaster reduction, etc. Due to the complexity of water flow characteristics and terrain conditions in plain large-flow rivers, traditional flow measurement methods often have problems such as difficult operation, low accuracy, and long time consumption. Therefore, it is urgent to propose a method for fast and accurate flow measurement of plain large-flow rivers. Summary of the invention

[0003] The present application provides a method and system for rapid flow measurement in a large-flow river, so as to at least solve the technical problems of difficult operation, low precision and long time consumption.

[0004] The first embodiment of the present application provides a method for rapid flow measurement in a large-flow river, the method comprising:

[0005] Use total stations to measure the cross-sectional area of ​​high-flow rivers at various water levels;

[0006] Using an acoustic Doppler current profiler to measure the average flow velocity of the large-flow river at each water level;

[0007] Determining a water level-flow curve of the large-flow river channel according to the cross-sectional area of ​​the large-flow river channel at each water level and the average flow velocity at each water level;

[0008] The water level at the time to be tested is obtained, and the flow rate corresponding to the water level at the time to be tested is found in the water level-flow rate curve, and the flow rate is used as the flow rate at the time to be tested.

[0009] Preferably, the method further comprises:

[0010] Real-time dynamic measurement technology is used to measure the cross-sectional area of ​​high-flow rivers at various water levels.

[0011] Preferably, determining the water level-flow curve of the large-flow river channel according to the cross-sectional area of ​​the large-flow river channel at each water level and the average flow velocity at each water level includes:

[0012] Constructing a water level-cross-sectional area relationship curve according to the cross-sectional area of ​​the large-flow river at various water levels;

[0013] Constructing a water level-flow velocity relationship curve according to the average flow velocity at each water level;

[0014] The water level-flow curve of the large-flow river channel is determined based on the water level-cross-sectional area relationship curve and the water level-flow velocity relationship curve.

[0015] Further, the determining of the water level-flow curve of the large flow river based on the water level-cross-sectional area relationship curve and the water level-flow velocity relationship curve includes:

[0016] Determining the cross-sectional area at each water level based on the water level-cross-sectional area relationship curve;

[0017] Determining the flow velocity at each water level based on the water level-flow velocity relationship curve;

[0018] Determine the product of cross-sectional area and flow velocity at each water level;

[0019] A water level-flow curve of the large-flow river channel is constructed based on the product of the cross-sectional area and the flow velocity at each water level.

[0020] The second embodiment of the present application provides a flow rapid testing system for a large flow river, comprising:

[0021] The first measurement module is used to measure the cross-sectional area of ​​a large-flow river at various water levels using a total station;

[0022] A second measurement module is used to measure the average flow velocity of the large flow river at each water level using an acoustic Doppler flow profiler;

[0023] A determination module, used to determine the water level-flow curve of the large-flow river channel according to the cross-sectional area of ​​the large-flow river channel at each water level and the average flow velocity at each water level;

[0024] The test module is used to obtain the water level at the time to be tested, find the flow rate corresponding to the water level at the time to be tested in the water level-flow rate curve, and use the flow rate as the flow rate at the time to be tested.

[0025] Preferably, the first measurement module is further used for:

[0026] Real-time dynamic measurement technology is used to measure the cross-sectional area of ​​high-flow rivers at various water levels.

[0027] Preferably, the determining module is further used for:

[0028] Constructing a water level-cross-sectional area relationship curve according to the cross-sectional area of ​​the large-flow river at various water levels;

[0029] Constructing a water level-flow velocity relationship curve according to the average flow velocity at each water level;

[0030] The water level-flow curve of the large-flow river channel is determined based on the water level-cross-sectional area relationship curve and the water level-flow velocity relationship curve.

[0031] Furthermore, the determining module is also used for:

[0032] Determining the cross-sectional area at each water level based on the water level-cross-sectional area relationship curve;

[0033] Determining the flow velocity at each water level based on the water level-flow velocity relationship curve;

[0034] Determine the product of cross-sectional area and flow velocity at each water level;

[0035] A water level-flow curve of the large-flow river channel is constructed based on the product of the cross-sectional area and the flow velocity at each water level.

[0036] The third aspect of the present application provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in the first aspect is implemented.

[0037] A fourth aspect of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect of the present application.

[0038] The technical solution provided by the embodiments of the present application brings at least the following beneficial effects:

[0039] The present application proposes a method and system for rapid flow measurement of a large-flow river, the method comprising: using a total station to measure the cross-sectional area of ​​the large-flow river at various water levels; using an acoustic Doppler flow profiler to measure the average flow velocity of the large-flow river at various water levels; determining the water level-flow curve of the large-flow river according to the cross-sectional area of ​​the large-flow river at various water levels and the average flow velocity at various water levels; obtaining the water level at the time to be measured, searching the water level-flow curve for the flow corresponding to the water level at the time to be measured, and using the flow as the flow at the time to be measured. The technical solution proposed in the present application has high accuracy and simplifies the flow calculation process, thereby improving the response speed of flow measurement.

[0040] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0042] Figure 1 A flowchart of a method for rapid flow testing of a large-flow river provided according to an embodiment of the present application;

[0043] Figure 2 The present invention is a structural diagram of a rapid flow test system for a large-flow river according to an embodiment of the present application. DETAILED DESCRIPTION

[0044] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0045] The present application proposes a method and system for rapid flow measurement of a large-flow river, the method comprising: using a total station to measure the cross-sectional area of ​​the large-flow river at various water levels; using an acoustic Doppler flow profiler to measure the average flow velocity of the large-flow river at various water levels; determining the water level-flow curve of the large-flow river according to the cross-sectional area of ​​the large-flow river at various water levels and the average flow velocity at various water levels; obtaining the water level at the time to be measured, searching the water level-flow curve for the flow corresponding to the water level at the time to be measured, and using the flow as the flow at the time to be measured. The technical solution proposed in the present application has high accuracy and simplifies the flow calculation process, thereby improving the response speed of flow measurement.

[0046] The following describes a method and system for rapid flow testing in a high-flow river channel according to an embodiment of the present application with reference to the accompanying drawings.

[0047] Embodiment 1

[0048] Figure 1 A flow chart of a method for rapid flow testing of a large-flow river provided according to an embodiment of the present application is shown in FIG. Figure 1 As shown, the method includes:

[0049] Step 1: Use a total station to measure the cross-sectional area of ​​the high-flow river at various water levels.

[0050] It should be noted that the total station obtains cross-section elevation information through the principles of angle measurement and distance measurement, can accurately locate the boundary of the cross-section and thus accurately obtain the cross-section area under various water levels.

[0051] In the disclosed embodiment, the real-time dynamic measurement technology RTK can also be used to measure the cross-sectional area of ​​a large-flow river at various water levels.

[0052] It should be noted that RTK uses satellite positioning technology to provide high-precision three-dimensional coordinate data, which is suitable for the measurement of large-scale river sections. RTK measurement has high accuracy and fast data acquisition speed, and is especially suitable for the geographical characteristics of wide plain rivers.

[0053] Step 2: Use an acoustic Doppler current profiler ADCP to measure the average flow velocity of the large-flow river at each water level.

[0054] It should be noted that when the river section is wide and the flow velocity is slow, ADCP can efficiently obtain the average flow velocity of the entire section.

[0055] Step 3: Determine the water level-flow curve of the high-flow river channel according to the cross-sectional area of ​​the high-flow river channel at each water level and the average flow velocity at each water level.

[0056] In the embodiment of the present disclosure, step 3 specifically includes:

[0057] Constructing a water level-cross-sectional area relationship curve according to the cross-sectional area of ​​the large-flow river at various water levels;

[0058] It should be noted that the relationship between water level and cross-sectional area can be quickly established through RTK or total station measurement. Multiple sets of water level data are fitted to form a water level-cross-sectional area relationship curve (HA), so that the corresponding cross-sectional area can be queried under any water level condition.

[0059] Constructing a water level-flow velocity relationship curve (HV) according to the average flow velocity at each water level;

[0060] The water level-flow curve of the large-flow river channel is determined based on the water level-cross-sectional area relationship curve and the water level-flow velocity relationship curve.

[0061] Wherein, the determining of the water level-flow curve of the large-flow river channel based on the water level-cross-sectional area relationship curve and the water level-flow velocity relationship curve comprises:

[0062] Determining the cross-sectional area at each water level based on the water level-cross-sectional area relationship curve;

[0063] Determining the flow velocity at each water level based on the water level-flow velocity relationship curve;

[0064] Determine the product of cross-sectional area and flow velocity at each water level;

[0065] A water level-flow curve of the large-flow river channel is constructed based on the product of the cross-sectional area and the flow velocity at each water level.

[0066] Step 4: Obtain the water level at the time to be tested, search the flow rate corresponding to the water level at the time to be tested in the water level-flow rate curve, and use the flow rate as the flow rate at the time to be tested.

[0067] Specifically, based on the obtained HA and HV curves, the flow calculation steps are as follows:

[0068] 1. Water level query: Get the real-time water level H.

[0069] 2. Cross-sectional area query: Find the corresponding cross-sectional area A on the HA curve according to the water level H.

[0070] 3. Average flow rate query: Find the corresponding average flow rate V on the HV curve according to the water level H.

[0071] 4. Flow calculation: Calculate the flow rate Q according to the formula Q=A×V.

[0072] It should be noted that the experimental application in plain high-flow rivers shows that the data is accurate and real-time by using real-time water level query HA and HV curves to estimate flow. Multiple verification experiments have shown that the flow measurement error is less than 5%, which fully meets the monitoring requirements of plain high-flow rivers. In addition, the flow calculation process is simplified through HA and HV curves, which significantly improves the convenience of flow estimation.

[0073] The rapid flow test method for a large-flow river proposed in this embodiment has the following advantages:

[0074] High measurement efficiency: The combination of RTK and total station enables rapid measurement of cross-sectional area. At the same time, ADCP's multi-layer velocity measurement improves data acquisition efficiency, which is particularly applicable in wide plain river scenes.

[0075] Strong real-time performance: Under known water level conditions, it is no longer necessary to frequently perform flow velocity and cross-section measurements. The flow rate can be quickly obtained by querying the HA and HV curves, which significantly improves the speed of flow estimation.

[0076] High accuracy: Under the relatively uniform flow characteristics of plain rivers, ADCP measurement error is small. HA curve and HV curve can accurately reflect the changes in cross-sectional area and average flow velocity.

[0077] Easy to operate: This method is based on conventional level, total station and ADCP equipment. It is easy to operate and does not require complicated on-site debugging. It is suitable for routine monitoring and emergency measurement of river flow in plain areas.

[0078] It provides a new technical means for monitoring flow in large-flow rivers in plains and provides effective support for hydrological monitoring and water conservancy scheduling. It can further optimize the curve fitting model and explore its applicability under different hydrological conditions to increase the breadth of application of this method.

[0079] In summary, the present embodiment provides a rapid flow rate test method for a river with large flow rates, which has high accuracy, simplifies the flow rate calculation process, and improves the response speed of flow rate measurement.

[0080] Embodiment 2

[0081] Figure 2 FIG. 1 is a structural diagram of a flow rapid testing system for a large flow river provided according to an embodiment of the present application, such as Figure 2 As shown, the system comprises:

[0082] The first measurement module 100 is used to measure the cross-sectional area of ​​a large-flow river at various water levels using a total station;

[0083] The second measurement module 200 is used to measure the average flow velocity of the large flow river at each water level using an acoustic Doppler flow profiler;

[0084] A determination module 300, for determining a water level-flow curve of the large-flow river channel according to the cross-sectional area of ​​the large-flow river channel at each water level and the average flow velocity at each water level;

[0085] The test module 400 is used to obtain the water level at the time to be tested, find the flow rate corresponding to the water level at the time to be tested in the water level-flow rate curve, and use the flow rate as the flow rate at the time to be tested.

[0086] In the embodiment of the present disclosure, the first measurement module 100 is further used for:

[0087] Real-time dynamic measurement technology is used to measure the cross-sectional area of ​​high-flow rivers at various water levels.

[0088] In the embodiment of the present disclosure, the determination module 300 is further used to:

[0089] Constructing a water level-cross-sectional area relationship curve according to the cross-sectional area of ​​the large-flow river at various water levels;

[0090] Constructing a water level-flow velocity relationship curve according to the average flow velocity at each water level;

[0091] The water level-flow curve of the large-flow river channel is determined based on the water level-cross-sectional area relationship curve and the water level-flow velocity relationship curve.

[0092] Furthermore, the determining module 300 is further configured to:

[0093] Determining the cross-sectional area at each water level based on the water level-cross-sectional area relationship curve;

[0094] Determining the flow velocity at each water level based on the water level-flow velocity relationship curve;

[0095] Determine the product of cross-sectional area and flow velocity at each water level;

[0096] A water level-flow curve of the large-flow river channel is constructed based on the product of the cross-sectional area and the flow velocity at each water level.

[0097] In summary, the rapid flow rate test system for a river with large flow rate proposed in this embodiment has high accuracy and simplifies the flow rate calculation process, thereby improving the response speed of flow rate measurement.

[0098] Embodiment 3

[0099] In order to implement the above embodiments, the present disclosure further proposes an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method described in Embodiment 1 is implemented.

[0100] Embodiment 4

[0101] In order to implement the above embodiments, the present disclosure further proposes a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, the method described in the first embodiment is implemented.

[0102] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0103] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code comprising one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0104] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A method for rapid flow measurement in a large-flow river, characterized in that: The method comprises: Use total stations to measure the cross-sectional area of ​​high-flow rivers at various water levels; Using an acoustic Doppler current profiler to measure the average flow velocity of the large-flow river at each water level; Determining a water level-flow curve of the large-flow river channel according to the cross-sectional area of ​​the large-flow river channel at each water level and the average flow velocity at each water level; The water level at the time to be tested is obtained, and the flow rate corresponding to the water level at the time to be tested is found in the water level-flow rate curve, and the flow rate is used as the flow rate at the time to be tested.

2. The method according to claim 1, characterized in that The method further comprises: Real-time dynamic measurement technology is used to measure the cross-sectional area of ​​high-flow rivers at various water levels.

3. The method according to claim 1, characterized in that Determining the water level-flow curve of the large flow river channel according to the cross-sectional area of ​​the large flow river channel at each water level and the average flow velocity at each water level comprises: Constructing a water level-cross-sectional area relationship curve according to the cross-sectional area of ​​the large-flow river at various water levels; Constructing a water level-flow velocity relationship curve according to the average flow velocity at each water level; The water level-flow curve of the large-flow river channel is determined based on the water level-cross-sectional area relationship curve and the water level-flow velocity relationship curve.

4. The method according to claim 3, characterized in that The step of determining the water level-flow curve of the large-flow river channel based on the water level-cross-sectional area relationship curve and the water level-flow velocity relationship curve comprises: Determining the cross-sectional area at each water level based on the water level-cross-sectional area relationship curve; Determining the flow velocity at each water level based on the water level-flow velocity relationship curve; Determine the product of cross-sectional area and flow velocity at each water level; A water level-flow curve of the large-flow river channel is constructed based on the product of the cross-sectional area and the flow velocity at each water level.

5. A rapid flow test system for a large-flow river, characterized in that: The system comprises: The first measurement module is used to measure the cross-sectional area of ​​a large-flow river at various water levels using a total station; A second measurement module is used to measure the average flow velocity of the large flow river at each water level using an acoustic Doppler flow profiler; A determination module, used to determine the water level-flow curve of the large-flow river channel according to the cross-sectional area of ​​the large-flow river channel at each water level and the average flow velocity at each water level; The test module is used to obtain the water level at the time to be tested, find the flow rate corresponding to the water level at the time to be tested in the water level-flow rate curve, and use the flow rate as the flow rate at the time to be tested.

6. The system according to claim 5, characterized in that The first measurement module is also used for: Real-time dynamic measurement technology is used to measure the cross-sectional area of ​​high-flow rivers at various water levels.

7. The system according to claim 5, characterized in that The determining module is also used for: Constructing a water level-cross-sectional area relationship curve according to the cross-sectional area of ​​the large-flow river at various water levels; Constructing a water level-flow velocity relationship curve according to the average flow velocity at each water level; The water level-flow curve of the large-flow river channel is determined based on the water level-cross-sectional area relationship curve and the water level-flow velocity relationship curve.

8. The system according to claim 7, characterized in that The determining module is also used for: Determining the cross-sectional area at each water level based on the water level-cross-sectional area relationship curve; Determining the flow velocity at each water level based on the water level-flow velocity relationship curve; Determine the product of cross-sectional area and flow velocity at each water level; A water level-flow curve of the large-flow river channel is constructed based on the product of the cross-sectional area and the flow velocity at each water level.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the method according to any one of claims 1 to 4 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 4 is implemented.

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