Reservoir spillway flood regulation calculation method and device and electronic equipment

Abstract

The invention provides a reservoir spillway flood regulation calculation method and device and electronic equipment, and the method comprises the steps: firstly selecting a reservoir original design flood hydrograph of a frequency corresponding to a target standard, then selecting a gate control working condition of a reservoir spillway, and carrying out the regulation calculation of the flood of the reservoir spillway based on the reservoir original design flood hydrograph and a reservoir original discharge capacity curve; and determining a reservoir design flood hydrograph and a reservoir discharge capacity curve corresponding to the gate control working condition, and then performing flood regulation calculation by adopting a water balance method based on the gate control working condition, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the normal storage level of the reservoir and the water level storage capacity curve of the reservoir to obtain a reservoir flood regulation hydrograph. By adopting the method, the efficiency and the accuracy of reservoir flood regulation calculation can be improved, so that the working efficiency of reservoir project spillway type comparison and selection can be improved.

Description

Technical Field

[0001] This invention relates to the field of reservoir flood regulation calculation technology, and in particular to a method, apparatus and electronic equipment for calculating flood regulation in a reservoir spillway. Background Technology

[0002] Flood regulation calculations for reservoirs are fundamental for determining dam crest elevation and the inundation range of backwater in the reservoir area. Spillways are commonly used as flood discharge structures. When there are no downstream flood-prone areas, the reservoir does not undertake flood control tasks. Flood control is based on the principle of ensuring the reservoir's safe passage through the flood season while preventing man-made floods downstream. In this case, the reservoir only reduces the downstream peak discharge flow, without significantly reducing the downstream flood volume. However, the flood flow process changes after being regulated by the spillway, objectively fulfilling the reservoir's flood retention function. Spillways are divided into two types: spillways without gates and spillways with gates. The discharge flow process lines after regulating the inflow floodwater differ between different types of spillways. During a flood event, the discharge flow may be controlled by gates for part of the time, while the gates may be fully open without control for another part of the time. This method of controlling the discharge by using gates in different time periods is more complex than the method of controlling the discharge by using gates without gates. In the early design and feasibility study of reservoir projects, the selection of spillway type (i.e. whether the spillway has gates) is an important part of the reservoir flood regulation calculation. It involves a wide variety of complex schemes, and the selection results directly determine the specific type of flood discharge structure, operation and management mode, investment scale, etc., which ultimately affect the structural layout and safety maintenance of the main project. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method, apparatus and electronic device for calculating flood regulation in a reservoir spillway, so as to alleviate the above-mentioned problems existing in the related art.

[0004] In a first aspect, embodiments of the present invention provide a method for calculating flood regulation of a reservoir spillway, comprising: selecting the original design flood hydrograph of the reservoir at the frequency corresponding to the target standard; selecting the gate control condition of the reservoir spillway, and determining the reservoir design flood hydrograph and reservoir discharge capacity curve corresponding to the gate control condition based on the original design flood hydrograph and the original discharge capacity curve of the reservoir; wherein, the gate control condition characterizes whether the corresponding spillway has a gate; and performing flood regulation calculation using the water balance method based on the gate control condition, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the normal water level of the reservoir, and the reservoir water level-capacity curve, to obtain the reservoir flood regulation hydrograph.

[0005] Secondly, embodiments of the present invention also provide a flood regulation calculation device for a reservoir spillway, comprising: a selection module for selecting the original design flood hydrograph of the reservoir at the frequency corresponding to the target standard; a selection and determination module for selecting the gate control condition of the reservoir spillway, and determining the reservoir design flood hydrograph and reservoir discharge capacity curve corresponding to the gate control condition based on the original design flood hydrograph and the original discharge capacity curve of the reservoir; wherein the gate control condition indicates whether the corresponding spillway has a gate; and a flood regulation calculation module for performing flood regulation calculation using the water balance method based on the gate control condition, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the normal water level of the reservoir, and the reservoir water level-capacity curve, to obtain the reservoir flood regulation hydrograph.

[0006] Thirdly, embodiments of the present invention also provide an electronic device, including a processor and a memory, wherein the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to implement the flood regulation calculation method for reservoir spillways described in the first aspect above.

[0007] This invention provides a method, apparatus, and electronic device for calculating flood regulation in a reservoir spillway. First, the original design flood hydrograph of the reservoir at the frequency corresponding to the target standard is selected. Then, the gate control condition of the reservoir spillway is selected. Based on the original design flood hydrograph and the original discharge capacity curve of the reservoir, the design flood hydrograph and discharge capacity curve of the reservoir corresponding to the gate control condition are determined. Then, based on the gate control condition, the design flood hydrograph and discharge capacity curve of the reservoir, as well as the normal water level and water level-capacity curve of the reservoir, flood regulation calculations are performed using the water balance method to obtain the reservoir flood regulation hydrograph. By employing the above-mentioned technology, the original design flood hydrograph of the reservoir at the corresponding frequency can be selected, and the gate control conditions of the selected reservoir spillway can be combined to determine the corresponding reservoir design flood hydrograph and reservoir discharge capacity curve. Then, by combining the gate control conditions, the normal water level of the reservoir, and the reservoir water level-capacity curve, flood regulation calculations can be performed using the water balance method. This improves the efficiency and accuracy of reservoir flood regulation calculations, thereby enhancing the efficiency of the selection process for different types of spillways in reservoir projects.

[0008] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0009] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0010] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0011] Figure 1 This is a flowchart illustrating a flood regulation calculation method for a reservoir spillway according to an embodiment of the present invention; Figure 2 This is a flowchart illustrating the flood regulation calculation method for reservoir spillways in an embodiment of the present invention. Figure 3 This is a diagram showing the flood control calculation results of a reservoir in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a flood regulation calculation device for a reservoir spillway in an embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0013] To facilitate understanding of this embodiment, a detailed description of the flood regulation calculation method for reservoir spillways disclosed in this embodiment of the invention will be provided first. (See [link to relevant documentation]). Figure 1 As shown, the method may include the following steps: Step S102: Select the original design flood hydrograph of the reservoir corresponding to the frequency of the target standard.

[0014] The original design flood process line of the corresponding frequency can be selected based on the design flood standard and check flood standard of the main structures of the reservoir, the energy dissipation and scour prevention standard, the land acquisition standard and the population migration standard.

[0015] The original design flood hydrographs for reservoirs are provided by hydrological experts. Design frequencies generally cover periods ranging from a few years to several thousand years. The reservoir design flood hydrographs required for flood regulation calculations are mainly related to dam crest elevation calculations, energy dissipation and scour prevention measures, and land acquisition and resettlement standards. Selecting the design flood hydrographs with the appropriate standards is sufficient; it is unnecessary to perform flood regulation calculations for all design frequencies of inflow floods. Table 1 shows the design flood hydrographs for various frequencies of a certain reservoir. The design flood hydrographs for frequencies of 0.1%, 2%, 3.33%, 10%, and 20% of the reservoir can be selected as the required design flood hydrographs for flood regulation calculations.

[0016] Table 1. Design flood hydrographs at various frequencies for a certain reservoir.

[0017] Step S104: Select the gate control condition of the reservoir spillway, and determine the reservoir design flood hydrograph and reservoir discharge capacity curve corresponding to the gate control condition based on the original design flood hydrograph and the original discharge capacity curve of the reservoir.

[0018] Among them, the gate control status can characterize whether there are gates in the corresponding spillway.

[0019] The gate control status of a reservoir spillway refers to whether or not the spillway uses gates to control flood discharge. The decision to use gates depends on the reservoir spillway's engineering layout plan. If gates are used, the number of gate control levels is further determined based on the flood control plan. Considering the reservoir's topography and geological conditions, the comparison of hydraulic engineering layout schemes, and factors such as transportation, power, and communication at the project site, reservoir spillways can use gates to control flood discharge when certain conditions are met. Generally, 1 to 4 levels of control are used (too many levels can lead to operational inconvenience).

[0020] After selecting the design flood hydrograph for flood regulation calculations required for the reservoir and determining whether the reservoir spillway has gate control for flood discharge, the design flood hydrograph and discharge capacity curve corresponding to the gate control condition can be further determined.

[0021] Step S106: Based on the gate control conditions, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the reservoir normal storage level, and the reservoir water level-capacity curve, the flood regulation calculation is performed using the water balance method to obtain the reservoir flood regulation hydrograph.

[0022] Based on the results of the reservoir spillway gate control operation and the corresponding design flood process line, discharge capacity curve, reservoir water level and storage capacity curve, dam site water level and flow rate relationship curve, etc., after determining the starting water level for flood regulation (i.e. the initial water level for flood regulation), the reservoir flood regulation process line under the design flood process of the required frequency can be calculated one by one. The highest water level of the flood regulation process line is the flood control characteristic water level under that frequency.

[0023] For spillways without gates, the starting water level for flood regulation can be directly set to the normal water level of the reservoir; for spillways with gates, the starting water level for flood regulation is generally set to 2m to 4m below the normal water level of the reservoir, taking into account factors such as flood characteristics, local customs, and cost savings.

[0024] This invention provides a method for calculating flood regulation in a reservoir spillway. First, the original design flood hydrograph of the reservoir at the frequency corresponding to the target standard is selected. Then, the gate control condition of the reservoir spillway is selected. Based on the original design flood hydrograph and the original discharge capacity curve of the reservoir, the design flood hydrograph and discharge capacity curve of the reservoir corresponding to the gate control condition are determined. Then, based on the gate control condition, the design flood hydrograph and discharge capacity curve, as well as the normal water level and water level-capacity curve of the reservoir, flood regulation calculations are performed using the water balance method to obtain the reservoir flood regulation hydrograph. Using this technique, by selecting the original design flood hydrograph of the reservoir at the corresponding frequency and combining it with the selected gate control condition of the reservoir spillway, the corresponding design flood hydrograph and discharge capacity curve of the reservoir can be determined. Then, by combining the gate control condition, the normal water level, and the water level-capacity curve, flood regulation calculations are performed using the water balance method, improving the efficiency and accuracy of reservoir flood regulation calculations, thereby improving the efficiency of reservoir spillway type selection.

[0025] As one possible implementation, the step S104 above, which determines the reservoir design flood hydrograph and reservoir discharge capacity curve corresponding to the gate control condition based on the reservoir's original design flood hydrograph and reservoir's original discharge capacity curve, may include: Step A1: If the gate control condition indicates that there is no gate in the corresponding spillway, then the original design flood hydrograph of the reservoir is determined as the reservoir design flood hydrograph, and the original discharge capacity curve of the reservoir is determined as the reservoir discharge capacity curve.

[0026] Continuing the previous example, if the reservoir spillway has no gate to control flood discharge, then the original design flood hydrograph and the original discharge capacity curve of the reservoir can be used as the design flood hydrograph and discharge capacity curve corresponding to the selected gate control condition without adjustment. The original discharge capacity curve can be provided by the hydraulic engineering professionals.

[0027] Step A2: If the gate control condition indicates that there is a gate in the corresponding spillway, the original design flood hydrograph of the reservoir is converted into a flood hydrograph with a preset time interval, and the flood hydrograph is determined as the design flood hydrograph of the reservoir. Then, the original discharge capacity curve of the reservoir is adjusted based on the gate control level and gate opening corresponding to the gate control condition, and the adjusted discharge capacity curve of the reservoir is determined as the discharge capacity curve of the reservoir.

[0028] The preset time interval is determined by averaging and discretizing the time interval of the original design flood process line of the reservoir. The adjusted reservoir discharge capacity curve includes the discharge capacity of each gate control critical point.

[0029] Continuing from the previous example, if the reservoir spillway has gates to control flood discharge, then the original design flood hydrograph of the reservoir needs to be refined, and the original discharge capacity curve of the reservoir needs to be adjusted according to the gate control level and corresponding opening degree.

[0030] The method for refining the original design flood hydrograph corresponding to the reservoir can be as follows: refine the original design flood hydrograph of the original time interval into the design flood hydrograph of the preset time interval.

[0031] The formula for calculating the gate opening degree corresponding to each level of gate control is as follows:

[0032] In the formula: The gate control level can be a positive integer no greater than 4; The gate height is in meters (m). For the first The gate opening degree during multi-stage gate control, in meters (m).

[0033] The original discharge capacity curve of the reservoir can be adjusted as follows: based on the gate opening controlled by different levels of gates, at the critical point controlled by each level of gate (referring to the reservoir water level plus 0.005m when the gate opening controlled by the previous level of gate changes to the gate opening controlled by the next level of gate), the discharge capacity corresponding to the gate opening is linearly interpolated, and the original discharge capacity curve is adjusted accordingly.

[0034] As one possible implementation, step A2 above, converting the original design flood hydrograph of the reservoir into a flood hydrograph with a preset time interval, may include: using the following formula to convert the original design flood hydrograph of the reservoir into a flood hydrograph:

[0035]

[0036]

[0037] in, The number of time points for the original design flood hydrograph of the reservoir (for example, it can be a positive integer no greater than 24). This is the number of time intervals that the original design flood hydrograph of the reservoir is averaged and discrete (for example, it can be an integer not less than 10). , These are two adjacent time points (in hours) of the original design flood hydrograph of the reservoir. The first flood hydrograph Each time point (in hours). , These are the inflow flood discharges (in m³) at two adjacent time points of the original design flood hydrograph. 3 / s), For the flood hydrograph Inflow flood discharge at each time point (unit: m³) 3 Table 2 shows the original design flood hydrograph of a reservoir, and Table 3 shows the design flood hydrograph obtained after refining the original design flood hydrograph of the reservoir.

[0038] Table 2 Original design flood hydrograph of a reservoir

[0039] Table 3. Design flood hydrograph of a reservoir after treatment

[0040] As one possible implementation, adjusting the reservoir's original discharge capacity curve based on the gate control level and gate opening degree corresponding to the gate control conditions in step A2 above may include: calculating the corresponding discharge capacity by linear interpolation at each gate control critical point of the reservoir's original discharge capacity curve based on the gate control level and gate opening degree using the following formula:

[0041]

[0042]

[0043] in, The number of gate control levels is Time The reservoir water level (in meters) at the critical point of the first-stage gate control. The critical point of the first-stage gate control refers to the... The gate opening degree controlled by the first-level gate becomes the second-level gate opening degree. The reservoir water level is increased by 0.005m when the gate opening is controlled by the sluice gate. , The original discharge capacity curves of the reservoir are respectively at Reservoir water levels at adjacent upper and lower positions (in meters). The number of gate control levels is Time The discharge capacity at the critical point of the gate control (unit: m) 3 / s), The original discharge capacity curve of the reservoir and Corresponding discharge capacity (unit: m) 3 / s), The original discharge capacity curve of the reservoir and Corresponding discharge capacity (unit: m) 3 Table 4 shows the discharge capacity curve of a reservoir without a sluice gate (normal water level 1947m), and Table 5 shows the discharge capacity curve of a reservoir with a sluice gate (normal water level 1947m, sluice gate height 5m).

[0044] Table 4. Discharge capacity curve of a reservoir's spillway without gates (normal water level 1947m)

[0045] Table 5. Discharge capacity curve of a reservoir with a sluice gate and spillway (normal water level 1947m, sluice gate height 5m).

[0046] As one possible implementation, step S106 (i.e., based on the gate control conditions, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the reservoir normal storage level, and the reservoir water level-capacity curve, the flood regulation calculation is performed using the water balance method to obtain the reservoir flood regulation hydrograph) may include: Step a1: Based on the reservoir discharge capacity curve and the reservoir water level-capacity curve, generate the reservoir storage-discharge curve through linear interpolation.

[0047] Continuing from the previous example, the reservoir storage and discharge curve (q~V curve) can be generated by linear interpolation using the following formula, based on the reservoir discharge capacity curve (H~q curve) and the reservoir water level and storage capacity curve (H~V curve):

[0048] in, This represents the number of nodes on the reservoir storage-discharge curve (q~V curve). The reservoir storage and discharge curve (q~V curve) is the first... The reservoir capacity of each node (in ten thousand m³) 3 ), , The reservoir water level and storage capacity curves (H~V curves) are respectively the numbers at the 1st, 2nd, and 3rd. The reservoir capacity (in ten thousand m³) of the adjacent upper and lower positions of each node. 3 ), , The reservoir water level and storage capacity curves (H~V curves) are respectively the numbers at the 1st, 2nd, and 3rd. The water levels (in meters) of the reservoirs at adjacent upper and lower positions of each node. The reservoir discharge capacity curve (H~q curve) is the first... The water level of the reservoir at each node (in meters).

[0049] Table 6 shows the water level and storage capacity curve, the adjusted discharge capacity curve, and the storage and discharge curve of a certain reservoir.

[0050] Table 6. Water level and storage capacity curves, adjusted discharge capacity curves, and storage-discharge curves of a certain reservoir.

[0051] Step a2: Determine the starting water level for flood regulation based on the gate control conditions and the normal water level of the reservoir.

[0052] Following the previous example, the flood control starting water level of a spillway without a gate can be directly set to the normal water level of the reservoir, while the flood control starting water level of a spillway with a gate can be set to a water level 2m to 4m below the normal water level of the reservoir.

[0053] Step a3: Flood regulation calculations are performed based on the initial water level for flood regulation, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the reservoir water level-storage capacity curve, the reservoir storage-discharge curve, and the water balance equation to obtain the reservoir flood regulation hydrograph.

[0054] The water balance equation can be:

[0055] in, The calculation period is in seconds. , Time periods Initial and final inflow flood discharge (unit: m³) 3 / s), , Time periods Initial and final outflow flood discharge (unit: m³) 3 / s), , Time periods Initial and final reservoir water storage (unit: 10,000 m³) 3 ).

[0056] Starting from the first time period, based on the initial water level of flood regulation, the reservoir water level-storage curve, and the reservoir discharge capacity curve, the reservoir storage volume and outflow flood discharge at the beginning of the first time period can be determined. Then, the following operation AE can be performed iteratively for each subsequent time period: A. Determine the inflow flood flow at the beginning and end of the current period based on the reservoir design flood hydrograph, and determine the assumed outflow flood flow at the end of the current period; B. Substitute the reservoir storage volume, outflow and inflow of floodwater at the beginning of the current period, and the inflow and assumed outflow of floodwater at the end of the current period into the water balance equation to calculate the reservoir storage volume at the end of the current period. C. Based on the reservoir storage volume and reservoir storage-discharge curve at the end of the current period, determine the outflow flood flow at the end of the current period; D. If the outflow of floodwater at the end of the current period is equal to the assumed outflow of floodwater at the end of the current period, then the assumed outflow of floodwater at the end of the current period is associated with the current period as the corresponding associated information, and the assumed outflow of floodwater at the end of the current period is used as the outflow of floodwater at the beginning of the next period. At the same time, the reservoir storage at the end of the current period is used as the reservoir storage at the beginning of the next period. Then, the above operations AC are performed on the next period. E. If the outflow of floodwater at the end of the current period is not equal to the assumed outflow of floodwater at the end of the current period, then repeat the above operation AC. After all time periods have undergone the above operation AE, the reservoir discharge flow process line is generated based on all the obtained correlation information as the reservoir flood regulation process line.

[0057] To facilitate understanding, the implementation process of the above-mentioned flood regulation calculation for the reservoir spillway is described in the following exemplary description using a specific application example.

[0058] The above-mentioned flood regulation calculation method for reservoir spillways can be written into a corresponding program in code form, see [link to relevant documentation]. Figure 2 As shown, the above-mentioned calculation method for flood regulation of reservoir spillways can be implemented according to the following process: Step 1: Select the original design flood hydrograph of the reservoir at the required frequency.

[0059] Specifically, the original design flood hydrographs for each frequency level can be pre-input into the program, and then the following operations can be performed through the program: Based on the "Classification of Water Conservancy and Hydropower Projects and Flood Standards" (SL252-2017) and the "Design Specifications for Land Acquisition and Resettlement Planning of Water Conservancy and Hydropower Projects" (SL / T 290-2024), the original design flood hydrographs for the corresponding frequencies can be selected by referring to relevant standards (including: design flood standards and check flood standards for permanent hydraulic structures of reservoirs, energy dissipation and scour prevention standards for energy dissipation and scour prevention structures, and land acquisition and population migration standards related to land acquisition and resettlement in the reservoir area). The design floods required for reservoir flood regulation calculations mainly include the design floods and check floods for permanent hydraulic structures, energy dissipation and scour prevention floods for energy dissipation and scour prevention structures, and land acquisition and population migration floods related to land acquisition and resettlement in the reservoir area.

[0060] Step 2: Select the control conditions for the reservoir spillway gate.

[0061] Specifically, the program can be pre-set to represent no gate and 1 to represent gate, so that the following operations can be performed: If the reservoir spillway is controlled to discharge floodwater without a gate, the gate control condition is selected as 0 (at this time, the flood control scheme is: when the reservoir water level exceeds the normal storage level, the floodwater is freely discharged through the spillway, and no manual flood control scheduling is required during the flood control process); if the reservoir spillway is controlled to discharge floodwater with a gate, the gate control condition is selected as 1 (at this time, the flood control scheme is: first, the gate control level is selected and determined by the program, and then manual flood control scheduling is performed).

[0062] Step 3: Determine the design flood hydrograph and discharge capacity curve corresponding to the control conditions of the reservoir spillway gate.

[0063] Specifically, the following operations can be performed through the program: If it is a spillway without gates, the original design flood hydrograph does not need to be processed, and the reservoir discharge capacity curve can directly use the original data provided by the hydraulic engineering professionals without adjustment. If there is a spillway, the original design flood hydrograph is refined. Specifically, the original design flood hydrograph for the original time interval is refined into a design flood hydrograph for a preset time interval to avoid calculation abrupt changes in the gate control critical point during gate-level control. The formula for processing the original design flood hydrograph is as follows:

[0064]

[0065]

[0066] Based on the gate control levels and corresponding opening degrees, the discharge capacity curve is adjusted. Specifically, the discharge capacity corresponding to the corresponding gate opening degree is calculated by linear interpolation at the critical points of the staged gate control in the original data of the reservoir discharge capacity curve, in order to adjust the original reservoir discharge capacity curve. The adjustment formula for the original reservoir discharge capacity curve is as follows:

[0067]

[0068]

[0069] Step 4: Perform reservoir flood control calculations under the selected gate control operating mode.

[0070] Specifically, the following operations can be performed through the program: assuming the reservoir water level is horizontal, the water balance method can be used to calculate reservoir flood regulation (i.e., flood control).

[0071] The water balance equation is as follows:

[0072] The flood regulation calculation process is as follows: Based on the reservoir water level-capacity curve (H~V curve) and the original or adjusted discharge capacity curve (H~q curve), the reservoir storage-discharge curve (q~V curve) is synthesized through linear interpolation. The linear interpolation formula is as follows:

[0073] Flood regulation calculations begin from the first time period. The water balance equation is obtained by referring to the reservoir level-capacity curve (H~V curve) and the original or adjusted discharge capacity curve (H~q curve) based on the determined flood regulation starting water level. , ; Perform the following operations in each time period: 1) Obtained from the original or processed design flood hydrograph. , ; 2) Then assume a The value is calculated based on the water balance equation. Value, by Find it on the reservoir storage-discharge curve (q~V curve). value; 3) If the assumption is Value and retrieved The two are equal. If it is what we are looking for, then we should re-assume. The value is obtained by repeating the above calculation process (i.e., calculating it based on the water balance equation). Value, by Found on the reservoir storage and discharge curve (value), until the assumed Value and retrieved The values ​​are equal until they are equal (this is achieved through program control during the trial calculation process). (The peak flow rate should be less than the inflow flood process curve at the design frequency to avoid man-made floods). 4) The end of the previous period , As the next period , Repeat the trial calculations from 1) to 3) above, and finally the reservoir discharge flow process curve can be obtained. That is, the flood control process line of the reservoir.

[0074] The calculation process for each time period can also yield statistical results on flood regulation, such as the highest flood level and the maximum reservoir capacity. Figure 3 The results of flood regulation calculations for a certain reservoir are shown. Figure 3 The document specifically illustrates the inflow and outflow flood processes of the reservoir at frequencies of 0.1%, 2%, 3.33%, 10%, and 20%.

[0075] The data selection and processing, as well as the flood regulation calculations in steps one through four above, are all automatically implemented by the program. However, it is necessary to input basic data in advance, such as the normal water level of the reservoir, the starting water level for flood regulation, the reservoir water level-capacity curve, the original design flood hydrograph, the original discharge capacity curve, and the water level-discharge relationship curve at the dam site. Then, the program selects the boundary conditions for calculation, such as whether the spillway has gate control, the number of gate control levels when there is gate control, and the average number of discrete time intervals of the original design flood hydrograph.

[0076] To address the shortcomings of traditional reservoir flood regulation calculation methods, such as their crudeness and lack of comparison between spillway with and without gates, the aforementioned flood regulation calculation method for reservoir spillways further refines the flood regulation calculation process when the spillway is controlled by gates. It creatively couples the flood regulation calculation process with and without gate control of the spillway with the comparison of spillway schemes with and without gates. Specifically, it first sets the spillway with and without gate control as the initial selection condition. After selecting whether the spillway has gate control for flood discharge, it automatically matches the corresponding flood regulation calculation process. Especially under the condition of gate control, by inputting the average number of discrete time intervals of the original design flood hydrograph and the number of gate control levels, it automatically processes and generates discrete design flood hydrographs and discharge capacity curves for gate control levels. This greatly improves the efficiency of comparing spillway schemes with and without gates, reduces the time and workload of flood regulation calculations, and thus lays a solid foundation for accelerating the demonstration of early-stage design schemes for reservoir projects.

[0077] By adopting the above-mentioned flood regulation calculation method for reservoir spillways, under the premise of ensuring that the flood discharge flow does not exceed the peak flow of the inflow flood, the method pre-sets the scheme selection mode for spillways with or without gates, and then matches the flood regulation calculation process corresponding to the selected scheme. This proceduralizes and modularizes the flood regulation calculation process for comparing schemes with or without gates in spillways. On the one hand, it can realize the standardization and normalization of the reservoir flood regulation calculation process, and on the other hand, it can greatly improve the efficiency of the scheme selection for spillways with or without gates in reservoir projects. In particular, it is of great significance for solving the technical problem of gate-based flood regulation in spillways with gates.

[0078] Based on the above-described method for calculating flood regulation in reservoir spillways, this invention also provides a device for calculating flood regulation in reservoir spillways. (See attached image.) Figure 4 As shown, the device may include the following modules: Select module 402, used to select the original design flood hydrograph of the reservoir at the frequency corresponding to the target standard.

[0079] The selection module 404 is used to select the gate control condition of the reservoir spillway, and to determine the reservoir design flood hydrograph and reservoir discharge capacity curve corresponding to the gate control condition based on the original design flood hydrograph and the original discharge capacity curve of the reservoir; wherein, the gate control condition indicates whether there is a gate in the corresponding spillway.

[0080] The flood regulation calculation module 406 is used to perform flood regulation calculations using the water balance method based on the gate control conditions, the reservoir design flood process line, the reservoir discharge capacity curve, the reservoir normal storage level, and the reservoir water level-capacity curve, to obtain the reservoir flood regulation process line.

[0081] The present invention provides a flood regulation calculation device for a reservoir spillway. By selecting the original design flood hydrograph of the reservoir at a corresponding frequency and combining it with the gate control conditions of the selected reservoir spillway, the corresponding design flood hydrograph and reservoir discharge capacity curve are determined. Then, by combining the gate control conditions, the normal water level of the reservoir, and the reservoir water level-capacity curve, flood regulation calculation is performed using the water balance method. This improves the efficiency and accuracy of reservoir flood regulation calculation, thereby improving the efficiency of the selection of spillway types for reservoir projects.

[0082] The flood regulation calculation device for reservoir spillways provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned flood regulation calculation method for reservoir spillways. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0083] This invention also provides an electronic device, such as... Figure 5The diagram shows the structure of the electronic device 100, which includes a processor 51 and a memory 50. The memory 50 stores computer-executable instructions that can be executed by the processor 51. The processor 51 executes the computer-executable instructions to implement the above-mentioned flood regulation calculation method for reservoir spillway.

[0084] exist Figure 5 In the illustrated embodiment, the electronic device further includes a bus 52 and a communication interface 53, wherein the processor 51, the communication interface 53, and the memory 50 are connected via the bus 52.

[0085] The memory 50 may include high-speed random access memory (RAM) and may also include non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 53 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc. The bus 52 may be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus 52 can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0086] The processor 51 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above-described reservoir spillway flood regulation calculation method can be completed by the integrated logic circuits in the processor 51 or by software instructions. The processor 51 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the reservoir spillway flood regulation calculation method disclosed in this embodiment can be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software modules can be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the field. The storage medium is located in the memory. The processor 51 reads the information in the memory and, in conjunction with its hardware, completes the steps of the flood regulation calculation method for the reservoir spillway in the aforementioned embodiment.

[0087] Unless otherwise specifically stated, the relative steps, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of the invention.

[0088] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a processor-executable, non-volatile, computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0089] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0090] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for calculating flood regulation in a reservoir spillway, characterized in that, include: Select the original design flood hydrograph of the reservoir corresponding to the frequency of the target standard; Select the gate control condition of the reservoir spillway, and determine the reservoir design flood hydrograph and reservoir discharge capacity curve corresponding to the gate control condition based on the original design flood hydrograph and the original discharge capacity curve of the reservoir; wherein, the gate control condition indicates whether the corresponding spillway has a gate; Based on the gate control conditions, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the reservoir normal storage level, and the reservoir water level-capacity curve, the flood regulation calculation is performed using the water balance method to obtain the reservoir flood regulation hydrograph.

2. The method for calculating flood regulation of a reservoir spillway according to claim 1, characterized in that, Based on the original design flood hydrograph and original discharge capacity curve of the reservoir, the design flood hydrograph and discharge capacity curve of the reservoir corresponding to the gate control condition are determined, including: If the gate control condition indicates that there is no gate in the corresponding spillway, then the original design flood hydrograph of the reservoir is determined as the design flood hydrograph of the reservoir, and the original discharge capacity curve of the reservoir is determined as the discharge capacity curve of the reservoir. If the gate control condition indicates that the corresponding spillway has a gate, then the original design flood hydrograph of the reservoir is converted into a flood hydrograph with a preset time interval, and the flood hydrograph is determined as the design flood hydrograph of the reservoir. Then, based on the gate control level and gate opening corresponding to the gate control condition, the original discharge capacity curve of the reservoir is adjusted, and the adjusted discharge capacity curve of the reservoir is determined as the discharge capacity curve of the reservoir. The preset time interval is determined by averaging and discretizing the time interval of the original design flood hydrograph of the reservoir, and the adjusted discharge capacity curve of the reservoir includes the discharge capacity of the critical point of each gate control level.

3. The method for calculating flood regulation of a reservoir spillway according to claim 2, characterized in that, Converting the original design flood hydrograph of the reservoir into a flood hydrograph with a preset time interval includes: The original design flood hydrograph of the reservoir is converted into the flood hydrograph using the following formula: in, The number of time points in the original design flood hydrograph of the reservoir. The number of time intervals for averaging and discretizing the original design flood hydrograph of the reservoir; , These are two adjacent time points on the original design flood hydrograph of the reservoir. The first flood hydrograph Each time point , These represent the inflow flood discharge at two adjacent time points along the original design flood hydrograph. For the flood hydrograph The inflow of floodwater at each time point.

4. The method for calculating flood regulation of a reservoir spillway according to claim 2, characterized in that, Adjusting the original discharge capacity curve of the reservoir based on the gate control level and gate opening corresponding to the gate control conditions includes: Based on the number of gate control stages and the gate opening, the corresponding discharge capacity is calculated by linear interpolation at the critical point of each gate control stage on the original discharge capacity curve of the reservoir using the following formula: in, The number of gate control levels is Time The reservoir water level at the critical point controlled by the sluice gate. , The original discharge capacity curves of the reservoir are respectively at The water levels of the reservoirs at adjacent upper and lower positions, The number of gate control levels is Time The discharge capacity of the gate at the critical point of control. The original discharge capacity curve of the reservoir and Corresponding discharge capacity, The original discharge capacity curve of the reservoir and Corresponding discharge capacity.

5. The method for calculating flood regulation in a reservoir spillway according to claim 2, characterized in that, Based on the gate control conditions, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the reservoir normal storage level, and the reservoir level-capacity curve, flood regulation calculations are performed using the water balance method to obtain the reservoir flood regulation hydrograph, including: Based on the reservoir discharge capacity curve and the reservoir water level-capacity curve, a reservoir storage-discharge curve is generated through linear interpolation; Based on the gate control conditions and the normal water level of the reservoir, the starting water level for flood regulation is determined; The flood regulation process line of the reservoir is obtained by performing flood regulation calculations based on the initial water level of the flood regulation, the design flood process line of the reservoir, the discharge capacity curve of the reservoir, the water level and storage capacity curve of the reservoir, the storage and discharge curve of the reservoir, and the water balance equation.

6. The method for calculating flood regulation of a reservoir spillway according to claim 5, characterized in that, Based on the reservoir discharge capacity curve and the reservoir water level-capacity curve, a reservoir storage-discharge curve is generated through linear interpolation, including: Based on the reservoir discharge capacity curve and the reservoir water level-capacity curve, the reservoir storage-discharge curve is generated by linear interpolation using the following formula: in, The number of nodes in the reservoir storage and discharge curve. The first reservoir storage and discharge curve The reservoir capacity of each node , The reservoir water level and storage capacity curves are respectively the first... The reservoir capacity of each node at its adjacent upper and lower positions. , The reservoir water level and storage capacity curves are respectively the first... The water levels of the reservoirs at adjacent upper and lower positions of each node. The first curve of the reservoir discharge capacity The water level of the reservoir at each node.

7. The method for calculating flood regulation of a reservoir spillway according to claim 5, characterized in that, The water balance equation is as follows: in, , Time periods The initial and final inflow flood flow rates , Time periods The initial and final outflow rates of the reservoir. , Time periods The initial and final water storage capacity of the reservoir.

8. The method for calculating flood regulation of a reservoir spillway according to claim 7, characterized in that, Based on the initial water level for flood regulation, the reservoir design flood hydrograph, the reservoir discharge capacity curve, the reservoir water level-storage capacity curve, the reservoir storage-discharge curve, and the water balance equation, flood regulation calculations are performed to obtain the reservoir flood regulation hydrograph, including: Starting from the first time period, based on the initial water level of the flood regulation, the reservoir water level-capacity curve, and the reservoir discharge capacity curve, the reservoir storage volume and outflow flood flow at the beginning of the first time period are determined, and then the following operation AE is performed iteratively for each subsequent time period: A. Based on the reservoir design flood hydrograph, determine the inflow flood flow at the beginning and end of the current period, and determine the assumed outflow flood flow at the end of the current period; B. Substitute the reservoir storage volume, outflow and inflow of floodwater at the beginning of the current period, and the inflow and assumed outflow of floodwater at the end of the current period into the water balance equation to calculate the reservoir storage volume at the end of the current period. C. Based on the reservoir water storage at the end of the current period and the reservoir storage-discharge curve, determine the outflow flood flow at the end of the current period; D. If the outflow of floodwater at the end of the current period is equal to the assumed outflow of floodwater at the end of the current period, then the assumed outflow of floodwater at the end of the current period is associated with the current period as the corresponding associated information, and the assumed outflow of floodwater at the end of the current period is used as the outflow of floodwater at the beginning of the next period. At the same time, the reservoir storage at the end of the current period is used as the reservoir storage at the beginning of the next period. Then, the above operations AC are performed on the next period. E. If the outflow of floodwater at the end of the current period is not equal to the assumed outflow of floodwater at the end of the current period, then repeat the above operation AC. After all time periods have undergone the above operation AE, a reservoir discharge flow process line is generated based on all the obtained correlation information as the reservoir flood regulation process line.

9. A flood regulation calculation device for a reservoir spillway, characterized in that, include: The selection module is used to select the original design flood hydrograph of the reservoir at the frequency corresponding to the target standard. The selection and determination module is used to select the gate control condition of the reservoir spillway, and to determine the reservoir design flood hydrograph and reservoir discharge capacity curve corresponding to the gate control condition based on the original design flood hydrograph and the original discharge capacity curve of the reservoir; wherein, the gate control condition indicates whether the corresponding spillway has a gate; The flood regulation calculation module is used to perform flood regulation calculations using the water balance method based on the gate control conditions, the reservoir design flood process curve, the reservoir discharge capacity curve, the reservoir normal storage level, and the reservoir water level-capacity curve, to obtain the reservoir flood regulation process curve.

10. An electronic device, characterized in that, The system includes a processor and a memory, the memory storing computer-executable instructions that can be executed by the processor, the processor executing the computer-executable instructions to implement the flood regulation calculation method for a reservoir spillway as described in any one of claims 1 to 8.

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