River channel overflowing scheduling scheme making method based on numerical simulation and related device
Through numerical simulation technology, a two-dimensional hydrodynamic model was established, which solved the problem of scheduling of the river in the broken stream, and realized the accurate analysis and prediction of the overflow capacity of the broken stream, providing a scientific basis for water resource allocation, and solving the traditional methods The problem of insufficient data.
Patent Information
- Application Number
- CN202411293328.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-01-07
AI Technical Summary
Under the conditions of restricted incoming water in the upstream, how to reasonably dispatch the water volume of the water conservancy hub to ensure the overflow capacity of the river, especially in the absence of sufficient hydrological observation records, it is difficult to formulate an effective river channel overflow scheduling plan.
Using a river channel overflow scheduling scheme based on numerical simulation, a two-dimensional hydrodynamic model is established by obtaining high-precision terrain data of the broken river channel and the water conservancy hub leakage flow data, and a two-dimensional hydrodynamic model is established, which simulates water depth changes and key section flow processes, and adjusts the model parameters to Generate the optimal overcurrent scheduling scheme.
Accurate simulation and prediction of the overflow conditions of broken rivers is achieved, scientific basis is provided to formulate the optimal overflow scheduling plan, make up for the insufficient measured hydrological data, and improve the efficiency of water resource allocation and water environment governance.
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Figure CN119272983A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of water environment management technology, and in particular to a method and related apparatus for formulating river flow scheduling schemes based on numerical simulation. Background Technology
[0002] Rivers, as a crucial component of the inland natural water cycle, have a vital impact on the stability of regional ecosystems, the maintenance of biodiversity, and human productive activities. However, with global climate change and intensified human activities, excessive water use and environmental damage have led to a significant reduction in the water volume of many rivers worldwide, and even long-term flow interruptions. These flow interruptions not only affect the health and stability of river ecosystems but also threaten human activities that depend on river resources.
[0003] In this context, effectively restoring and maintaining the continuous flow of rivers is of paramount importance. Especially when upstream water flow is limited, how to rationally manage the water volume of water conservancy projects to ensure the river's flow capacity has become an urgent problem to be solved. Traditional water conservancy project management relies heavily on abundant hydrological data; however, for rivers that have been dry for a long time, the lack of sufficient hydrological observation records makes it difficult to directly use historical data to formulate management plans. Summary of the Invention
[0004] The purpose of this application is to provide a method and related apparatus for formulating river flow control schemes based on numerical simulation, which can accurately simulate the flow conditions of interrupted rivers under different water conservancy hubs' river flow control schemes, so as to analyze and predict the flow capacity of interrupted rivers.
[0005] To achieve the above objectives, this application provides the following solution:
[0006] Firstly, this application provides a method for formulating river flow scheduling schemes based on numerical simulation, including the following steps:
[0007] Acquire high-precision topographic data of the interrupted river channel, daily discharge data of the upstream water conservancy hub of the interrupted river channel, and daily flow data of the downstream observation station of the interrupted river channel.
[0008] Based on high-precision topographic data of the interrupted river channel and daily discharge data of the upstream water conservancy hub, an initial two-dimensional hydrodynamic model of the interrupted river channel is established. The initial two-dimensional hydrodynamic model of the interrupted river channel is used to simulate the water depth changes along the interrupted river channel and the discharge process at key cross-sections.
[0009] Based on the daily flow data from the downstream observation stations of the interrupted river channel, the model parameters of the initial two-dimensional hydrodynamic model of the interrupted river channel were calibrated to obtain the two-dimensional hydrodynamic model of the interrupted river channel.
[0010] Obtain the scheduling capacity of upstream water conservancy hubs in the interrupted river channel, and generate several undetermined river channel flow scheduling schemes based on the scheduling capacity of upstream water conservancy hubs in the interrupted river channel.
[0011] For any undetermined river flow scheduling scheme, the corresponding flow scheduling time is determined using a two-dimensional hydrodynamic model of the interrupted river.
[0012] Based on the flow scheduling time corresponding to each undetermined river flow scheduling scheme, the optimal river flow scheduling scheme is formulated.
[0013] Optionally, the high-precision topographic data of the interrupted river channel is point cloud data measured when the interrupted river channel is in a state of no water or very low water level; the distance between two adjacent points in the high-precision topographic data of the interrupted river channel does not exceed 20m, the measurement accuracy reaches the centimeter level, and the high-precision topographic data of the interrupted river channel can accurately reflect the topographic features of the interrupted river channel.
[0014] Optionally, based on the daily flow data from observation stations downstream of the interrupted river channel, the model parameters of the initial two-dimensional hydrodynamic model of the interrupted river channel are calibrated to obtain the two-dimensional hydrodynamic model of the interrupted river channel, specifically including the following steps:
[0015] Using daily discharge data from upstream water conservancy hubs in a river with interrupted flow as upstream boundary conditions and daily water levels at the river outlet as downstream boundary conditions, the study simulates the changes in water depth along the river and the flow processes at key cross-sections.
[0016] By comparing the daily flow data simulated by the initial two-dimensional hydrodynamic model of the interrupted river channel with the daily flow data of the downstream observation station of the interrupted river channel, the parameters of the hydrodynamic model were calibrated, and the two-dimensional hydrodynamic model of the interrupted river channel was obtained. The model parameters of the initial two-dimensional hydrodynamic model of the interrupted river channel include: time step, roughness coefficient and infiltration parameters.
[0017] Optionally, the following steps are also included:
[0018] Obtain satellite remote sensing images of rivers that have stopped flowing; the water area of a river that has stopped flowing can be accurately identified in the satellite remote sensing images of rivers that have stopped flowing.
[0019] Based on the water area of the satellite remote sensing image of the interrupted river channel, the water area simulated by the two-dimensional hydrodynamic model of the interrupted river channel is verified to ensure that the water area simulated by the two-dimensional hydrodynamic model of the interrupted river channel is basically consistent with the water area of the satellite remote sensing image of the interrupted river channel.
[0020] Optionally, the river flow scheduling schemes to be determined include: low flow scheduling scheme, medium flow scheduling scheme, high flow scheduling scheme, flow scheduling scheme from low to high, flow scheduling scheme from high to low, and pulse flow scheduling scheme.
[0021] Alternatively, the optimal river flow control scheme is as follows: when there is a large amount of water coming from upstream, the upstream water conservancy hub of the interrupted river will release water using a large flow control scheme; when there is a small amount of water coming from upstream, the upstream water conservancy hub of the interrupted river will store water appropriately and then release water using a medium flow control scheme.
[0022] Secondly, this application provides a device for formulating river flow scheduling schemes based on numerical simulation, comprising:
[0023] The relevant data acquisition module is used to acquire high-precision topographic data of the interrupted river channel, daily discharge data of the upstream water conservancy hub of the interrupted river channel, and daily flow data of the downstream observation station of the interrupted river channel.
[0024] The hydrodynamic model building module is used to establish an initial two-dimensional hydrodynamic model of the interrupted river channel based on high-precision topographic data of the interrupted river channel and daily discharge data of the upstream water conservancy hub of the interrupted river channel. The initial two-dimensional hydrodynamic model of the interrupted river channel is used to simulate the water depth changes along the interrupted river channel and the flow process at key cross-sections.
[0025] The model parameter calibration module is used to calibrate the model parameters of the initial two-dimensional hydrodynamic model of the interrupted river based on the daily flow data of the downstream observation station of the interrupted river, so as to obtain the two-dimensional hydrodynamic model of the interrupted river.
[0026] The module for generating undetermined schemes is used to obtain the scheduling capacity of upstream water conservancy hubs in the interrupted river channel, and generate several undetermined river channel flow scheduling schemes based on the scheduling capacity of upstream water conservancy hubs in the interrupted river channel.
[0027] The overflow scheduling time determination module is used to determine the overflow scheduling time corresponding to any overflow scheduling scheme for a river channel to be determined, using a two-dimensional hydrodynamic model of the interrupted river channel.
[0028] The optimal scheduling scheme determination module is used to formulate the optimal river flow scheduling scheme based on the flow scheduling time corresponding to each river flow scheduling scheme to be determined.
[0029] Thirdly, this application provides a computer device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method for formulating a river flow scheduling scheme based on numerical simulation described above.
[0030] Fourthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for formulating a river flow scheduling scheme based on numerical simulation described above.
[0031] Fifthly, this application provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the method for formulating a river flow scheduling scheme based on numerical simulation described above.
[0032] According to the specific embodiments provided in this application, the following technical effects are disclosed:
[0033] This application provides a method and related apparatus for formulating river flow control schemes based on numerical simulation. In this method, an initial two-dimensional hydrodynamic model of the interrupted river is established based on the high-precision topographic data of the interrupted river and the daily discharge data of the upstream water conservancy hub. The model parameters are then calibrated based on the daily discharge data of the downstream observation station to obtain the two-dimensional hydrodynamic model of the interrupted river, which accurately simulates the water depth changes and key cross-sectional discharge processes along the interrupted river. Subsequently, based on the scheduling capacity of the upstream water conservancy hub, several undetermined river flow control schemes are generated. The flow control time corresponding to each undetermined river flow control scheme is determined using the two-dimensional hydrodynamic model of the interrupted river. Finally, based on the flow control time corresponding to each undetermined river flow control scheme, the optimal river flow control scheme is formulated. The above-mentioned scheme of this application uses a numerical simulation method to accurately simulate the flow situation of interrupted rivers under different water conservancy hub flow scheduling schemes, so as to analyze and predict the flow capacity of interrupted rivers, provide a basis for formulating the optimal river flow scheduling scheme, make up for the problem of insufficient measured hydrological data of existing interrupted rivers, and provide a scientific basis for water resource allocation and water environment management of interrupted rivers. Attached Figure Description
[0034] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the 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.
[0035] Figure 1 This is a flowchart illustrating a method for formulating a river flow scheduling scheme based on numerical simulation, as provided in one embodiment of this application.
[0036] Figure 2 This is a broken line diagram illustrating the flow rate of the Sujiabao Hub, the simulated flow rate in front of the Zongbanwobao Hub, and the flow rate after the Zongbanwobao Hub in a method for formulating a river flow scheduling scheme based on numerical simulation, provided in another embodiment of this application.
[0037] Figure 3This is a schematic diagram comparing the water area simulated by the model and the water area displayed by satellite remote sensing in a method for formulating a river flow scheduling scheme based on numerical simulation, provided in another embodiment of this application.
[0038] Figure 4 This is a schematic diagram of the functional modules of a river flow scheduling scheme formulation system based on numerical simulation, provided in an embodiment of this application.
[0039] Figure 5 This is a schematic diagram of the structure of a computer device provided in an embodiment of this application. Detailed Implementation
[0040] 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.
[0041] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0042] In one exemplary embodiment, such as Figure 1 As shown, a method for formulating river flow scheduling schemes based on numerical simulation is provided, including the following steps:
[0043] A1. Acquire high-precision topographic data of the interrupted river channel, daily discharge data of the upstream water conservancy hub, and daily flow data of the downstream observation station. The high-precision topographic data of the interrupted river channel is point cloud data measured when the interrupted river channel is dry or at a very low water level; the distance between two adjacent points in the high-precision topographic data of the interrupted river channel does not exceed 20m, and the measurement accuracy reaches the centimeter level. The high-precision topographic data of the interrupted river channel can accurately reflect the topographic features of the interrupted river channel.
[0044] A2. Based on high-precision topographic data of the interrupted river channel and daily discharge data of the upstream water conservancy hub of the interrupted river channel, an initial two-dimensional hydrodynamic model of the interrupted river channel is established. The initial two-dimensional hydrodynamic model of the interrupted river channel is used to simulate the water depth changes along the interrupted river channel and the flow process at key cross sections.
[0045] A3. Based on the daily flow data from the downstream observation stations of the interrupted river channel, the model parameters of the initial two-dimensional hydrodynamic model of the interrupted river channel are calibrated to obtain the two-dimensional hydrodynamic model of the interrupted river channel. In this embodiment, step A3 specifically includes the following steps:
[0046] A31. Using the daily discharge data of the upstream water conservancy hub of the interrupted river as the upstream boundary condition and the daily water level at the outlet of the interrupted river as the downstream boundary condition, simulate the water depth changes and the flow process of key sections along the interrupted river.
[0047] A32. By comparing the daily flow data simulated by the initial two-dimensional hydrodynamic model of the interrupted river channel with the daily flow data of the downstream observation station of the interrupted river channel, the parameters of the hydrodynamic model are calibrated to obtain the two-dimensional hydrodynamic model of the interrupted river channel. The model parameters of the initial two-dimensional hydrodynamic model of the interrupted river channel include: time step, roughness coefficient and infiltration parameters.
[0048] A4. Obtain the scheduling capacity of the upstream water conservancy hub of the interrupted river, and generate several undetermined river flow scheduling schemes based on the scheduling capacity of the upstream water conservancy hub of the interrupted river. The scheduling capacity of the upstream water conservancy hub of the interrupted river is the downstream discharge range of the water conservancy hub; in this embodiment, the several undetermined river flow scheduling schemes generated include: small flow scheduling scheme, medium flow scheduling scheme, large flow scheduling scheme, flow scheduling scheme from small to large, flow scheduling scheme from large to small, and pulse flow scheduling scheme.
[0049] A5. For any undetermined river flow control scheme, use a two-dimensional hydrodynamic model of the interrupted river to determine the corresponding flow control time. The flow control time is the time it takes for water to travel from the upstream hydraulic engineering project to the downstream observation station.
[0050] A6. Based on the flow scheduling time corresponding to each undetermined river flow scheduling scheme, the optimal river flow scheduling scheme is formulated. In this embodiment, the optimal river flow scheduling scheme is as follows: when the upstream inflow is high, the upstream water conservancy hub of the interrupted river will release water using a high-flow scheduling scheme; when the upstream inflow is low, the upstream water conservancy hub of the interrupted river will appropriately store water and then release water using a medium-flow scheduling scheme.
[0051] In order for the hydrodynamic model to accurately simulate the evolution of river flow, in an exemplary embodiment, the method further includes the following steps:
[0052] Obtain satellite remote sensing images of rivers that have ceased flowing; these images should accurately identify the extent of the water area within the river channel. The resolution of the satellite remote sensing images should be better than 30 meters to clearly identify the water area within the river channel.
[0053] Based on the water area of the satellite remote sensing image of the interrupted river channel, the water area simulated by the two-dimensional hydrodynamic model of the interrupted river channel is verified to ensure that the water area simulated by the two-dimensional hydrodynamic model of the interrupted river channel is basically consistent with the water area of the satellite remote sensing image of the interrupted river channel.
[0054] The following section uses the main stream of the Xiliao River as the research object to introduce the method for formulating a river flow scheduling scheme based on numerical simulation provided in this embodiment of the invention. The Xiliao River is located in southeastern Inner Mongolia Autonomous Region. It is formed by the confluence of the southern source, the Laoha River, and the northern source, the Xilamulun River, at Hailiutu Village, Daxing Township, Wengniute Banner, Inner Mongolia Autonomous Region. The river has a total length of 403 kilometers.
[0055] The Xiliao River has two large-scale water conservancy projects on its main stream: the Sujiabao Water Conservancy Project, located at the beginning of the main stream, and the Zongbanwobao Water Conservancy Project, located approximately 70 kilometers downstream of the Sujiabao Water Conservancy Project. The Xiliao River has been dry since 2000. In the spring of 2023 and 2024, local authorities seized the favorable opportunity of the spring flood season to regulate the discharge from upstream water conservancy projects, allowing the water to flow downstream as much as possible.
[0056] The method for formulating a river flow regulation scheme for the Xiliao River provided in this embodiment specifically includes the following steps:
[0057] B1. Acquire high-precision topographic data of the Xiliao River channel, satellite remote sensing images of the Xiliao River channel, data on upstream water conservancy projects and their daily discharge data, and daily discharge data from downstream observation stations on the Xiliao River channel. The upstream water conservancy project data is used to determine the scheduling capacity of the upstream water conservancy projects.
[0058] For high-precision topographic data, this embodiment collects high-precision topographic data from Sujiabao Water Conservancy Project to Wanjiatun on the main stream of the Xiliao River. During the data measurement period, the river channel was basically dry or the water level was very low. The topographic data is in the form of point cloud, with the distance between two adjacent points not exceeding 20m. The measurement accuracy reaches the centimeter level, which can accurately reflect the topographic features of the Xiliao River channel, water diversion canals, embankments, etc.
[0059] For satellite remote sensing images, this embodiment collects remote sensing data of Landsat-9 Level 2 band B7 on March 31, 2023. The data is obtained from geospatial data cloud and has a resolution of 30m, which can identify the water area in the river channel.
[0060] Regarding upstream water conservancy project data, this embodiment collects engineering data on major water conservancy projects along the Xiliao River, including the Sujiabao Water Conservancy Project and the Zongbanwobao Water Conservancy Project.
[0061] Regarding flow data, this embodiment collects daily flow data from major water conservancy hubs on the Xiliao River, including the Sujiabao Water Conservancy Hub and the Zongbanwobao Water Conservancy Hub, covering the period from March 1 to April 1, 2023. The Zongbanwobao Water Conservancy Hub is also used as an observation station for the calibration of model parameters.
[0062] B2. Based on the current high-precision topographic data of the river channel and the daily discharge data of the water conservancy project, a two-dimensional hydrodynamic model of the river channel is established. In this embodiment, Telemac2D is used to establish a two-dimensional hydrodynamic model of the main stream of the Xiliao River.
[0063] B3. Calibrate the model parameters using daily flow data from observation stations. Additionally, satellite remote sensing images can be used to verify the simulation results, ensuring the hydrodynamic model accurately simulates the river flow evolution process.
[0064] In this embodiment, the upstream boundary condition of the model is the daily discharge flow of the Sujiabao Hydropower Station. To ensure the stability of the hydrodynamic model results, the downstream boundary is set to the water level of the river at Wanjiatun. Since the river is currently in a state of flow interruption, the downstream boundary water level is set to 189.5m, only 0.1m higher than the lowest point of the river. Considering the influence of spring snowmelt and previous precipitation, the initial water depth of the model is 0.01m.
[0065] The model's parameters mainly include time step, roughness, and infiltration coefficient. In this embodiment, multiple parameter combinations are set, with time steps of 10s, 20s, and 30s; the roughness is selected using Strickler's law, and the Strickler coefficient is 30m. 1 / 3 / s, 50m 1 / 3 / s, 80m 1 / 3 / s; the infiltration coefficients were 0mm / d, 3mm / d, and 10mm / d, respectively. Based on the simulated flow process upstream of the Zongbanwopu Hydropower Station using various parameter combinations, the flow process downstream of the station was compared with the actual measured discharge flow process to determine the optimal parameter combination.
[0066] After the above calibration, the optimal parameter set determined in this embodiment is: time step of 20 seconds, Strickler coefficient of 80m. 1 / 3 / s, with an infiltration coefficient of 3mm / d. The discharge flow rate of the Sujiabao Hydropower Station, the simulated flow rate upstream of the Zongbanwobao Hydropower Station gate, and the discharge flow rate downstream of the Zongbanwobao Hydropower Station gate are as follows: Figure 2 As shown.
[0067] In addition, the simulated river area was compared with the area shown in the Landsat satellite remote sensing image. Figure 3 The upper part represents the area of water simulated by the model. Figure 3 The lower black area represents the water area shown by satellite remote sensing. It can be seen that the water area simulated by the model is basically consistent with the water area shown by the satellite remote sensing image.
[0068] B4. Based on the allowable discharge range of the water conservancy project, design multiple water conservancy project scheduling schemes. In this embodiment, the discharge amount is the same as the upstream flow of the Zongbanwopu Project, and only the discharge flow of the Sujiabao Project is scheduled and controlled. The simulation period is set at 30 days, including several scheduling schemes to be determined, such as small flow, medium flow, large flow, flow from small to large, flow from large to small, and pulse flow. The specific scheduling process of each scheduling scheme is shown in Table 1:
[0069] Table 1. Scheduling process for each scheduling scheme to be determined
[0070] Scheme Number Scheduling process 1 The flow rate is 10 m³ / s 2 The flow rate is 60 m³ / s 3 <![CDATA[Flow rate is 120 m 3 / s]]> 4 <![CDATA[The flow rate increases from 4 m 3 / s to 120 m 3 / s]]> 5 <![CDATA[The flow rate decreases from 120 m 3 / s to 4 m3 / s]]> 6 <![CDATA[40 m per day 3 / s, 80 m per day 3 / s, and so on in a cycle]]>
[0071] Table 1 shows Schemes 1 through 3, which reflect the scheduling scenarios for small, medium, and large flow rates, respectively. However, when the upstream water flow is insufficient, it may not be possible to guarantee large flow operation. Therefore, three scheduling schemes were designed: flow rate from small to large, flow rate from large to small, and pulse flow. These schemes utilize water conservancy projects to first store water and then discharge it, thereby increasing the outflow rate.
[0072] B5. Using a hydrodynamic model, simulate the water flow evolution process of the river under various undetermined scheduling schemes, and compare the river's flow capacity under different undetermined scheduling schemes. In this embodiment, the river's flow capacity refers to the flow time, that is, the time it takes for the water to reach Wanjiatun.
[0073] Table 2 shows the time it takes for water to reach Wanjiatun under each scheduling scheme, and the schemes are sorted according to the length of time.
[0074] Table 2 Comparison of Overcurrent Time for Each Scheduling Scheme
[0075] Scheme number Scheduling process Arrival time at Wanjiatun (in hours) 3 <![CDATA[Flow rate is 120 m 3 / s]]> 103 5 <![CDATA[The flow rate decreases from 120 m 3 / s to 4 m 3 / s]]> 104 2 <![CDATA[Flow rate is 60 m 3 / s]]> 134 6 <![CDATA[40 m per day 3 / s, 80 m per day 3 / s, cycle]]> 154 4 <![CDATA[The flow rate increases from 4 m 3 / s to 120 m 3 / s]]> 250 1 The flow rate is 10 m³ / s 338
[0076] Table 2 shows that the high-flow scheduling scheme only takes 103 hours to reach Wanjiatun. The next best is the high-to-low flow scheduling scheme, which takes 104 hours. Since the flow transition time is only about 4 days, the flow rate of the high-to-low flow scheduling scheme is relatively high during this period. The medium-flow scheduling scheme takes 134 hours. The pulse flow scheduling scheme takes 154 hours. The low-to-high flow scheduling scheme has a flow transition time of 250 hours due to the lower initial flow rate. The low-flow scheduling scheme has the longest flow transition time, reaching 338 hours.
[0077] B6. Based on the flow scheduling time corresponding to each undetermined river flow scheduling scheme, the optimal river flow scheduling scheme is formulated. Based on the results calculated in step B5, it is known that the larger the discharge flow of the water conservancy hub, the shorter the time to reach Wanjiatun. However, in reality, the upstream water flow may not be sufficient to support a long-term, high-flow discharge. When the upstream water flow is low, if the discharge flow of the water conservancy hub is small, the flow time in this river section will exceed 10 days. In this case, water can be stored in the water conservancy hub first, and the discharge flow can be increased when the water storage reaches a certain level. When the discharge flow of the water conservancy hub is 60m³... 3 At a flow rate of 60 m³ / s, it only takes 134 hours to reach Wanjiatun, significantly reducing the transit time. However, changing the discharge flow rate of the water conservancy project from 60 m³ / s... 3 / s increased to 120m 3 At a flow rate of / s, the flow time is only shortened by 30 hours, but the difficulty of initial water storage will increase significantly, and the water storage time may be longer than the reduction in flow time. Stable flow rate: 60m. 3 Compared to pulsed discharge, steady discharge has a shorter flow time, even though the average flow rate is the same.
[0078] In summary, the optimal river flow control scheme determined in this embodiment is as follows: when there is a large inflow from upstream, the water conservancy hub maintains a large discharge; when there is a small inflow from upstream, appropriate water storage is implemented, followed by a discharge of 60m... 3 Discharge is carried out at a discharge rate of / s, which can take into account both water storage and flow time.
[0079] The method for formulating river flow scheduling schemes based on numerical simulation provided in this embodiment makes up for the lack of measured hydrological data in existing intermittent rivers, and provides a scientific basis for water resource allocation and water environment management in intermittent rivers.
[0080] Based on the same inventive concept, this application also provides a numerical simulation-based river flow scheduling scheme formulation system for implementing the above-mentioned numerical simulation-based river flow scheduling scheme formulation method. The solution provided by this device is similar to the implementation scheme described in the above method. Therefore, the specific limitations of one or more numerical simulation-based river flow scheduling scheme formulation system embodiments provided below can be found in the limitations of the numerical simulation-based river flow scheduling scheme formulation method described above, and will not be repeated here.
[0081] In one exemplary embodiment, such as Figure 4 As shown, a system for formulating river flow scheduling schemes based on numerical simulation is provided, including the following modules:
[0082] The relevant data acquisition module is used to acquire high-precision topographic data of the interrupted river channel, daily discharge data of the upstream water conservancy hub of the interrupted river channel, and daily flow data of the downstream observation station of the interrupted river channel.
[0083] The hydrodynamic model building module is used to establish an initial two-dimensional hydrodynamic model of the interrupted river channel based on high-precision topographic data of the interrupted river channel and daily discharge data of the upstream water conservancy hub of the interrupted river channel. The initial two-dimensional hydrodynamic model of the interrupted river channel is used to simulate the water depth changes along the interrupted river channel and the flow process at key cross-sections.
[0084] The model parameter calibration module is used to calibrate the model parameters of the initial two-dimensional hydrodynamic model of the interrupted river based on the daily flow data of the downstream observation station of the interrupted river, so as to obtain the two-dimensional hydrodynamic model of the interrupted river.
[0085] The module for generating undetermined schemes is used to obtain the scheduling capacity of upstream water conservancy hubs in the interrupted river channel, and generate several undetermined river channel flow scheduling schemes based on the scheduling capacity of upstream water conservancy hubs in the interrupted river channel.
[0086] The overflow scheduling time determination module is used to determine the overflow scheduling time corresponding to any overflow scheduling scheme for a river channel to be determined, using a two-dimensional hydrodynamic model of the interrupted river channel.
[0087] The optimal scheduling scheme determination module is used to formulate the optimal river flow scheduling scheme based on the flow scheduling time corresponding to each river flow scheduling scheme to be determined.
[0088] certainly, Figure 4 The architecture shown is merely exemplary; it can be omitted as needed when implementing different functionalities. Figure 4 One or at least two components of the system shown.
[0089] In one exemplary embodiment, a computer device is provided, which may be a server or a terminal, and its internal structure diagram may be as follows. Figure 5 As shown, the computer device includes a processor, memory, input / output (I / O) interfaces, and a communication interface. The processor, memory, and I / O interfaces are connected via a system bus, and the communication interface is also connected to the system bus via the I / O interfaces. The processor provides computational and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The I / O interfaces are used for exchanging information between the processor and external devices. The communication interface is used for communication with external terminals via a network connection. When the computer program is executed by the processor, it implements the numerical simulation-based river flow scheduling scheme formulation method described in the above embodiment.
[0090] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.
[0091] In one exemplary embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.
[0092] In one exemplary embodiment, a computer-readable storage medium is provided storing a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.
[0093] In one exemplary embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above-described method embodiments.
[0094] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of the relevant data must comply with relevant regulations.
[0095] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM).
[0096] The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.
[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0098] 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. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.
Claims
1. A method for formulating a river flow scheduling plan based on numerical simulation, characterized in that: include: Obtain high-precision topographic data of dry-up rivers, daily discharge data of water conservancy hubs upstream of dry-up rivers, and daily flow data of observation stations downstream of dry-up rivers; An initial two-dimensional hydrodynamic model of the dry-up river is established based on the high-precision topographic data of the dry-up river and the daily discharge flow data of the upstream water conservancy project of the dry-up river; the initial two-dimensional hydrodynamic model of the dry-up river is used to simulate the water depth change along the dry-up river and the flow process of key sections; Calibrate the model parameters of the initial two-dimensional hydrodynamic model of the dry-flow river according to the daily flow data of the observation station downstream of the dry-flow river to obtain the two-dimensional hydrodynamic model of the dry-flow river; Obtaining the dispatching capacity of the upstream water conservancy hub of the dry-up river, and generating a number of to-be-determined river flow dispatching plans according to the dispatching capacity of the upstream water conservancy hub of the dry-up river; For any undetermined river channel flow scheduling scheme, using the two-dimensional hydrodynamic model of the dry river channel to determine the flow scheduling time corresponding to the undetermined river channel flow scheduling scheme; Based on the flow scheduling time corresponding to each river flow scheduling scheme to be determined, the optimal river flow scheduling scheme is formulated.
2. The method for formulating a river flow scheduling plan based on numerical simulation according to claim 1 is characterized in that: The high-precision terrain data of the dry-up river channel is point cloud data measured when the dry-up river channel is in a water-free or low-water state; the distance between two adjacent points in the high-precision terrain data of the dry-up river channel does not exceed 20m, and the measurement accuracy reaches the centimeter level. The high-precision terrain data of the dry-up river channel can accurately reflect the terrain characteristics of the dry-up river channel.
3. The method for formulating a river flow scheduling plan based on numerical simulation according to claim 1 is characterized in that: According to the daily flow data of the observation station downstream of the dry-up river channel, the model parameters of the initial dry-up river channel two-dimensional hydrodynamic model are calibrated to obtain the dry-up river channel two-dimensional hydrodynamic model, which specifically includes: The daily discharge flow data of the upstream water conservancy project of the dry river channel is used as the upstream boundary condition, and the daily water level at the outlet of the dry river channel is used as the downstream boundary condition to simulate the water depth change along the dry river channel and the flow process of key sections. By comparing the daily flow data simulated by the two-dimensional hydrodynamic model of the initial dry-up river channel with the daily flow data of the observation station downstream of the dry-up river channel, the parameters of the hydrodynamic model are calibrated to obtain the two-dimensional hydrodynamic model of the dry-up river channel; the model parameters of the two-dimensional hydrodynamic model of the initial dry-up river channel include: time step, roughness and infiltration parameter.
4. The method for formulating a river flow scheduling plan based on numerical simulation according to claim 1 is characterized in that: Also includes: Obtaining a satellite remote sensing image of a dry river channel; the satellite remote sensing image of the dry river channel can accurately identify the water area of the dry river channel; According to the water area range of the satellite remote sensing image of the dry river channel, the water area range simulated by the two-dimensional hydrodynamic model of the dry river channel is verified to ensure that the water area range simulated by the two-dimensional hydrodynamic model of the dry river channel is basically consistent with the water area range of the satellite remote sensing image of the dry river channel.
5. The method for formulating a river flow scheduling plan based on numerical simulation according to claim 1, characterized in that: The to-be-determined river flow scheduling scheme includes: a small flow scheduling scheme, a medium flow scheduling scheme, a large flow scheduling scheme, a small to large flow scheduling scheme, a large to small flow scheduling scheme and a pulse flow scheduling scheme.
6. The method for formulating a river flow scheduling plan based on numerical simulation according to claim 1 is characterized in that: The optimal river flow scheduling plan is: when there is a lot of water coming from upstream, the water conservancy hub upstream of the dry-up river channel will release water using a large-flow scheduling plan; when there is less water coming from upstream, the water conservancy hub upstream of the dry-up river channel will store water appropriately, and then release water using a medium-flow scheduling plan.
7. A device for formulating river flow scheduling scheme based on numerical simulation, characterized in that: include: Related data acquisition module, used to obtain high-precision terrain data of dry-up rivers, daily discharge flow data of water conservancy hubs upstream of dry-up rivers, and daily flow data of observation stations downstream of dry-up rivers; A hydrodynamic model building module is used to build an initial two-dimensional hydrodynamic model of the dry-up river channel according to the high-precision topographic data of the dry-up river channel and the daily discharge flow data of the upstream water conservancy hub of the dry-up river channel; the initial two-dimensional hydrodynamic model of the dry-up river channel is used to simulate the water depth change along the dry-up river channel and the flow process of key sections; A model parameter calibration module, used to calibrate the model parameters of the initial dry-flow river channel two-dimensional hydrodynamic model according to the daily flow data of the observation station downstream of the dry-flow river channel, so as to obtain the dry-flow river channel two-dimensional hydrodynamic model; The to-be-determined scheme generation module is used to obtain the dispatching capacity of the upstream water conservancy hub of the dry river channel, and generate a number of to-be-determined river channel flow dispatching schemes according to the dispatching capacity of the upstream water conservancy hub of the dry river channel; A flow scheduling time determination module, for determining, for any flow scheduling scheme to be determined, the flow scheduling time corresponding to the flow scheduling scheme to be determined by using the two-dimensional hydrodynamic model of the dry river; The optimal scheduling scheme determination module is used to formulate the optimal river flow scheduling scheme based on the flow scheduling time corresponding to each river flow scheduling scheme to be determined.
8. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for formulating a river flow scheduling plan based on numerical simulation as described in any one of claims 1 to 6.
9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for formulating a river flow scheduling plan based on numerical simulation described in any one of claims 1 to 6 is implemented.
10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the method for formulating a river flow scheduling plan based on numerical simulation described in any one of claims 1 to 6 is implemented.