A method, apparatus, equipment and storage medium for determining ecological flow in dehydrated river channels.

Abstract

This application proposes a method, apparatus, equipment, and storage medium for determining the ecological flow of a dewatered river channel. The method involves identifying a dewatered river section and its corresponding target hydrodynamic model downstream of a diversion-type hydropower station dam, analyzing the aquatic ecology of the dewatered river section, identifying characteristic fish species, determining the ecological water depth of the dewatered river section based on these species, and determining the ecological flow of the dewatered river channel for ecological connectivity restoration based on the dewatered river section, ecological water depth, and target hydrodynamic model. Considering the characteristic fish species, specifically the longitudinal flow of the river's ecological water depth, the method ultimately determines the ecological flow of the dewatered river channel for ecological connectivity restoration, making the determination of the ecological flow of the dewatered river channel more accurate.

Description

Technical Field

[0001] This application relates to the field of hydrology, and in particular to a method, apparatus, equipment and storage medium for determining the ecological flow of a dehydrated river channel. Background Technology

[0002] Today, diversion-type hydropower stations play a significant role in power generation, flood control, and drought relief. However, most of these stations lacked ecological flow release facilities in their early stages, resulting in water reduction in the river section downstream of the power plant. Prolonged water reduction can lead to the disappearance of the original river ecosystem, causing severe degradation of the river's ecosystem functions. Furthermore, for rivers experiencing chronic water reduction, it is necessary to determine ecological flow for restoration. Currently, habitat simulation is commonly used to determine ecological flow. However, this method only considers the size of suitable habitats and does not take into account the longitudinal flow of aquatic animals, i.e., the longitudinal flow of ecological water depth in the river. Therefore, the determined ecological flow is biased and inaccurate. Summary of the Invention

[0003] This application provides a method, apparatus, equipment, and storage medium for determining the ecological flow of dehydrated river channels, to solve at least one problem existing in related technologies. The technical solution is as follows:

[0004] In a first aspect, embodiments of this application provide a method for determining the ecological flow of a dehydrated river channel, including:

[0005] In the river section downstream of the dam site of the diversion-type hydropower station, the dewatering section and the target hydrodynamic model corresponding to the dewatering section are determined;

[0006] The aquatic ecology of the dehydrated river section was analyzed to identify characteristic fish species;

[0007] Based on the characteristic fish species, determine the ecological water depth of the dehydrated river section;

[0008] Based on the dewatering section, the ecological water depth, and the target hydrodynamic model, the ecological flow of the dewatering channel for ecological connectivity restoration is determined.

[0009] In one implementation, determining the target hydrodynamic model corresponding to the dehydrated river section includes:

[0010] Obtain topographic survey data, hydrological test data, and hydrological data of the dewatering section;

[0011] Based on the topographic survey data, an initial hydrodynamic model is established;

[0012] Based on the hydrological survey data and the hydrological data, the initial hydrodynamic model is calibrated until the accuracy requirements are met, thus obtaining the target hydrodynamic model.

[0013] In one embodiment, determining the ecological water depth of the dehydrated river section based on the characteristic fish species includes:

[0014] Determine the sexually mature body length of the characteristic fish species;

[0015] The ecological water depth of the dehydrated river section is determined based on a preset multiple of the length of the sexually mature organism.

[0016] In one implementation, determining the ecological flow of the dehydrated river channel for ecological connectivity restoration based on the dehydrated river section, the ecological water depth, and the target hydrodynamic model includes:

[0017] Determine the first length of the dehydrated river section;

[0018] The topography of the dewatering river section was analyzed to determine whether there were any target river sections that could not form ecological water depth channels under natural conditions.

[0019] Using the target hydrodynamic model and the ecological water depth, the second length corresponding to different discharge flows is simulated.

[0020] Based on the first length, the second length, and the existence of the target river section, the ecological flow of the dewatered river channel for ecological connectivity restoration is determined.

[0021] In one embodiment, the dewatering river section includes several sub-sections; the second length corresponding to different discharge flows, simulated using the target hydrodynamic model and the ecological water depth, includes:

[0022] The target hydrodynamic model is used to simulate the maximum water depth of each sub-river segment corresponding to different discharge flows.

[0023] Based on the maximum water depth of each sub-river section and the ecological water depth, determine the target sub-river sections with a maximum water depth less than the ecological water depth corresponding to different discharge flows;

[0024] The sub-length of each target sub-segment is determined, and the sub-lengths of each target sub-segment corresponding to different discharge flows are summed to obtain the second length corresponding to different discharge flows.

[0025] In one implementation, determining the reduced-flow river channel ecological flow for ecological connectivity restoration based on the first length, the second length, and the existence of the target river segment includes:

[0026] If the target river segment exists, determine the third length of the target river segment;

[0027] The difference between each of the second length and the third length is determined, and a first ratio of the difference to the first length is determined.

[0028] Each of the first ratios is compared with a preset threshold to determine at least one first target flow rate corresponding to a first ratio that is less than the preset threshold.

[0029] Select the dewatering river ecological flow for ecological connectivity restoration from at least one of the first target-directed flows.

[0030] In one implementation, determining the reduced-flow river channel ecological flow for ecological connectivity restoration based on the first length, the second length, and the existence of the target river segment includes:

[0031] When the target river segment does not exist, determine the second ratio of each second length to the first length;

[0032] Each of the second ratios is compared with a preset threshold to determine at least one second target flow rate corresponding to a second ratio that is less than the preset threshold.

[0033] Select the dewatering channel ecological flow for ecological connectivity restoration from at least one of the second target-directed flows.

[0034] Secondly, embodiments of this application provide a device for determining the ecological flow of a dehydrated river channel, comprising:

[0035] The first determining module is used to determine the dewatering section and the target hydrodynamic model corresponding to the dewatering section in the river section below the dam site of the diversion-type hydropower station.

[0036] The second determining module is used to analyze the aquatic ecological conditions of the dehydrated river section and determine the characteristic fish species;

[0037] The third determining module is used to determine the ecological water depth of the dehydrated river section based on the characteristic fish species.

[0038] The fourth determining module is used to determine the ecological flow of the dehydrated river channel for ecological connectivity restoration based on the dehydrated river section, the ecological water depth, and the target hydrodynamic model.

[0039] Thirdly, embodiments of this application provide an electronic device, including: a processor and a memory, wherein the memory stores instructions that are loaded and executed by the processor to implement the methods in any of the above-described embodiments.

[0040] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed, implements the methods in any of the above-described embodiments.

[0041] The beneficial effects of the above technical solution include at least the following:

[0042] By identifying the dewatering section and the corresponding target hydrodynamic model in the river section downstream of the diversion-type hydropower station dam site, the aquatic ecology of the dewatering section is analyzed, characteristic fish species are identified, and the ecological water depth of the dewatering section is determined based on the characteristic fish species. Based on the dewatering section, ecological water depth, and target hydrodynamic model, the ecological flow of the dewatering channel for ecological connectivity restoration is determined. Considering the characteristic fish species, i.e., the longitudinal flow of the river's ecological water depth, the ecological flow of the dewatering channel for ecological connectivity restoration is finally determined, making the determination of the ecological flow of the dewatering channel for ecological connectivity restoration more accurate.

[0043] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0044] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0045] Figure 1 This is a schematic flowchart illustrating the steps of a method for determining the ecological flow of a dehydrated river channel according to an embodiment of this application;

[0046] Figure 2 This is a structural block diagram of a dewatering river ecological flow determination device according to an embodiment of this application;

[0047] Figure 3 This is a structural block diagram of an electronic device according to an embodiment of this application. Detailed Implementation

[0048] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0049] Reference Figure 1The flowchart illustrates a method for determining the ecological flow of a dehydrated river channel according to an embodiment of this application. This method may include at least steps S100-S400:

[0050] S100. In the river section downstream of the dam site of the diversion-type hydropower station, determine the dewatering section and the target hydrodynamic model corresponding to the dewatering section.

[0051] S200. Analyze the aquatic ecology of the dehydrated river section and identify characteristic fish species.

[0052] S300. Determine the ecological water depth of the dehydrated river section based on the characteristic fish species.

[0053] S400. Based on the dewatering section, ecological water depth, and target hydrodynamic model, determine the ecological flow of the dewatering channel for ecological connectivity restoration.

[0054] The method for determining the ecological flow of dehydrated river channels according to the embodiments of this application can be executed by terminals such as computers, mobile phones, tablets, and vehicle terminals or cloud servers. In this embodiment, the execution of the method is taken as an example by the system in the terminal.

[0055] The technical solution of this application embodiment determines the dewatering section and the corresponding target hydrodynamic model in the river section downstream of the dam site of the diversion-type hydropower station. It analyzes the aquatic ecological conditions of the dewatering section, identifies characteristic fish species, determines the ecological water depth of the dewatering section based on the characteristic fish species, and determines the ecological flow of the dewatering channel for ecological connectivity restoration based on the dewatering section, ecological water depth, and target hydrodynamic model. Considering the factor of characteristic fish species, namely the longitudinal flow of the river's ecological water depth, the ecological flow of the dewatering channel for ecological connectivity restoration is finally determined, making the determination of the ecological flow of the dewatering channel more accurate.

[0056] In one implementation, in the river section downstream of the dam site of a diversion-type hydropower station, the actual operating data of the diversion-type hydropower station can be used to analyze the river section downstream of the dam site where the flow is interrupted or the flow is significantly reduced due to the water diversion of the diversion-type hydropower station. This allows for the determination of the dewatering river section and its first length L1, which is then input into the system for subsequent calculations.

[0057] In one implementation, step S100, which determines the target hydrodynamic model corresponding to the dewatered river section, includes steps S110-S130:

[0058] S110. Obtain topographic survey data of the dewatering section, hydrological test data during the water release test, and hydrological data.

[0059] Optionally, topographic survey data of the dewatering section, hydrological test data during the water release test, and hydrological data can be obtained through aerial imagery, historical operating data of the diversion hydropower station, and relevant data from the Internet.

[0060] S120. Based on topographic survey data, establish an initial hydrodynamic model.

[0061] It should be noted that a two-dimensional initial hydrodynamic model is established based on topographic survey data. The method for constructing the initial hydrodynamic model can be based on existing related methods and will not be described in detail.

[0062] S130. Based on hydrological survey data and hydrological data, calibrate the initial hydrodynamic model until it meets the accuracy requirements, and obtain the target hydrodynamic model.

[0063] Optionally, based on hydrological measurement data (including actual discharge flow and other data) and hydrological data, the actual water level, water depth, flow velocity, etc. of the hydrological measurement section or hydrological station are compared with the simulation results of the initial hydrodynamic model. If the difference exceeds 10%, the parameters of the two-dimensional hydrodynamic model are calibrated based on the hydrological measurement data until the difference does not exceed 10% and the accuracy requirement is met. At this time, the initial hydrodynamic model is the target hydrodynamic model.

[0064] In one implementation, the aquatic ecological conditions during the high and low water periods within the dehydrated river section are determined based on methods such as manual collection or aerial photography, and then the aquatic ecological conditions are analyzed to identify the characteristic fish species in the dehydrated river section.

[0065] In one implementation, step S300 includes steps S310-S320:

[0066] S310. Determine the sexually mature body length of characteristic fish species.

[0067] Optionally, the sexually mature body length L of the characteristic fish can be determined based on Internet data or relevant books and materials, and then input into the system for subsequent calculations.

[0068] S320. Determine the ecological water depth of the dehydrated river section based on a preset multiple of the length of sexually mature bodies.

[0069] Optionally, taking a preset multiple of 2 to 3 times as an example, since one of the restoration goals is to restore the longitudinal channel of aquatic animals, in order to facilitate the fattening and swimming of characteristic fish, the ecological water depth D of the dehydrated river section is 2 to 3 times the sexually mature body length L of the characteristic fish in the dehydrated river section, that is, D = 2L to 3L.

[0070] In one embodiment, step S400 includes steps S410-S440:

[0071] S410. Determine the first length L1 of the dewatering section.

[0072] Optionally, the dewatering section may include several sub-sections, the sum of the lengths of the sub-sections being the first length L1.

[0073] S420. Analyze the topography of the dewatering river section to determine whether there are any target river sections that cannot form ecological water depth channels under natural conditions.

[0074] Optionally, based on aerial images and on-site survey data from both high and low water periods, analysis can be conducted to determine whether there are target river sections that, under natural conditions, cannot form ecological deep-water channels (effective water surface width) due to factors such as scattered boulders and subsequently formed roads. For example, if a section of the riverbed downstream of a power station dam site is naturally littered with large boulders, the water surface width formed at this cross-section is not significant even with large floodwater inflows during the flood season due to the obstruction of these boulders, and this cross-section has naturally become a passage for terrestrial animals on both banks, then this type of river section, which fails to form ecological deep-water channels even with large floodwater inflows under natural conditions, is the target river section.

[0075] S430. Using the target hydrodynamic model and ecological water depth, the second length corresponding to different discharge flows is simulated.

[0076] First, a set of discharge flows can be pre-defined, with each flow increasing sequentially. The specific increment can be set based on actual conditions. Then, the different discharge flows from the set are input into the target hydrodynamic model. This allows the target hydrodynamic model to simulate the maximum water depth of each sub-river segment corresponding to different discharge flows. For example, a discharge flow of 5m... 3 / s, statistics for 5m 3 / s corresponds to the maximum water depth of each sub-river section, and the same applies to other downstream flow rates.

[0077] Secondly, based on the maximum water depth and ecological water depth of each sub-river segment, target sub-river segments with maximum water depths less than ecological water depths corresponding to different discharge flows are identified. Specifically, the maximum water depth of each sub-river segment is compared with the ecological water depth D to determine the target sub-river segments with maximum water depths less than ecological water depth D, thereby identifying the target sub-river segments with maximum water depths less than ecological water depths corresponding to different discharge flows.

[0078] Furthermore, the sub-length of each target sub-segment is determined, and the sub-lengths of each target sub-segment corresponding to different discharge flows are summed to obtain the second length L2 corresponding to different discharge flows. For example, assume a discharge flow of 5m³ / s. 3 / s corresponds to three target sub-river segments. The sub-lengths of these three target sub-river segments are summed to determine the discharge flow rate of 5m. 3 / s corresponds to the second length L2; assuming a flow rate of 10m. 3 / s corresponds to five target sub-river segments. The sub-lengths of these five target sub-river segments are summed to determine the discharge flow rate of 10m. 3 The second length corresponding to / s. Therefore, the second length L2 corresponding to different downlink flows can be determined.

[0079] S440. Based on the first length, the second length, and the existence of the target river section, determine the ecological flow of the dewatered river channel used for ecological connectivity restoration.

[0080] Optionally, S440 may include steps S4401-S4404:

[0081] S4401. When a target river segment exists, determine the third length L3 of the target river segment.

[0082] S4402. Determine the difference between each second length and the third length, and determine the first ratio of the difference to the first length.

[0083] Optionally, the difference between each second length L2 and the third length L3 is determined, and a first ratio of the difference to the first length L1 is determined: (L2-L3) / L1.

[0084] S4403. Compare each first ratio with a preset threshold to determine at least one first target flow rate corresponding to a first ratio that is less than the preset threshold.

[0085] Optionally, taking a preset threshold of 95% as an example, without specific limitations, each first ratio is compared with the preset threshold to determine at least one first target flow rate corresponding to the first ratio that is less than the preset threshold. For example, there are two first ratios that are less than the preset threshold of 95%, and these two first ratios correspond to a flow rate of 5m. 3 / s and 10m 3 / s, at this point the first target's flow rate is determined to be 5m. 3 / s and 10m 3 / s.

[0086] S4404. Select the dewatering channel ecological flow for ecological connectivity restoration from at least one primary target discharge flow.

[0087] Optionally, if there is only one primary target discharge flow, it is directly determined as the ecological flow for reducing dewatering in the river channel used for ecological connectivity restoration; however, if there are multiple primary target discharge flows, the smallest primary target discharge flow can be selected as the ecological flow for reducing dewatering in the river channel used for ecological connectivity restoration. For example, in the above example, a discharge flow of 5m³ can be selected. 3 / s is used as the ecological flow of dehydrated river channels for ecological connectivity restoration.

[0088] Optionally, S440 may also include steps S4405-S4407:

[0089] S4405. When there is no target river segment, determine the second ratio of each second length to the first length: L2 / L1.

[0090] S4406. Compare each second ratio with a preset threshold to determine at least one second target flow rate corresponding to a second ratio that is less than the preset threshold.

[0091] Similarly, taking a preset threshold of 95% as an example, without specific limitations, each second ratio is compared with the preset threshold to determine at least one second target flow rate corresponding to a second ratio that is less than the preset threshold. For example, there are two second ratios that are less than the preset threshold of 95%, and these two second ratios correspond to a flow rate of 10m. 3 / s and 15m 3 / s, at this point the first target's flow rate is determined to be 10m. 3 / s and 15m 3 / s.

[0092] S4407. Select the dewatering channel ecological flow for ecological connectivity restoration from at least one secondary target-deferred flow.

[0093] Similarly, if there is only one secondary target discharge flow, it is directly determined as the ecological flow for reducing dewatering in the river channel used for ecological connectivity restoration; however, if there are multiple secondary target discharge flows, the smallest secondary target discharge flow can be selected as the ecological flow for reducing dewatering in the river channel used for ecological connectivity restoration. For example, in the above example, a discharge flow of 10m³ can be selected. 3 / s serves as the ecological flow for reducing dewatering in river channels to restore ecological connectivity, and is also the ecological flow required for restoring longitudinal channels for aquatic animals.

[0094] The method in this application introduces the concept of ecological connectivity restoration, making the determination of ecological flow in the dewatered river section closer to the actual situation and having ecological significance, thus providing a more accurate reference for the determination of ecological flow at the dam site of a water diversion power station.

[0095] Reference Figure 2 The diagram illustrates a structural block diagram of a dewatering river ecological flow determination device according to an embodiment of this application. The device may include:

[0096] The first determining module is used to determine the dewatering section and the target hydrodynamic model corresponding to the dewatering section in the river section below the dam site of the diversion-type hydropower station.

[0097] The second determination module is used to analyze the aquatic ecology of the dehydrated river section and identify characteristic fish species;

[0098] The third determining module is used to determine the ecological water depth of the dehydrated river section based on the characteristic fish species.

[0099] The fourth determination module is used to determine the ecological flow of the dewatered river channel for ecological connectivity restoration based on the dewatered river section, ecological water depth, and target hydrodynamic model.

[0100] The functions of each module in the devices of this application embodiment can be found in the corresponding descriptions in the above methods, and will not be repeated here.

[0101] Reference Figure 3 The diagram illustrates a structural block diagram of an electronic device according to an embodiment of this application. The electronic device includes a memory 310 and a processor 320. The memory 310 stores instructions that can be executed on the processor 320. The processor 320 loads and executes these instructions to implement the method for determining the ecological flow of a dehydrated river channel as described in the above embodiment. The number of memories 310 and processors 320 can be one or more.

[0102] In one embodiment, the electronic device further includes a communication interface 330 for communicating with external devices and exchanging data. If the memory 310, processor 320, and communication interface 330 are implemented independently, they can be interconnected via a bus to communicate with each other. This bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. This bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0103] Optionally, in a specific implementation, if the memory 310, processor 320 and communication interface 330 are integrated on a single chip, the memory 310, processor 320 and communication interface 330 can communicate with each other through an internal interface.

[0104] This application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method for determining the ecological flow of dehydrated river channels provided in the above embodiments.

[0105] This application also provides a chip, which includes a processor for calling and executing instructions stored in a memory, causing a communication device on which the chip is installed to perform the method provided in this application.

[0106] This application also provides a chip, including: an input interface, an output interface, a processor, and a memory. The input interface, output interface, processor, and memory are connected through an internal connection path. The processor is used to execute code in the memory. When the code is executed, the processor is used to execute the method provided in the application embodiment.

[0107] It should be understood that the aforementioned processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. General-purpose processors can be microprocessors or any conventional processor. It is worth noting that the processor can be a processor supporting the Advanced Reduced Instruction Set Computing (RISC) machine (ARM) architecture.

[0108] Further, optionally, the aforementioned memory may include read-only memory and random access memory, and may also include non-volatile random access memory. The memory may be volatile or non-volatile, or may include both. Non-volatile memory may include read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory may include random access memory (RAM), which serves as an external cache. Many forms of RAM are available by way of example, but not limitation. Examples include static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous linked dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0109] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented, in whole or in part, as a computer program product. A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another.

[0110] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0111] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0112] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process. Furthermore, the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functionality involved.

[0113] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0114] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. All or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware, the program being stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiments.

[0115] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. This storage medium can be a read-only memory, a disk, or an optical disk, etc.

[0116] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for determining the ecological flow of a dewatered river channel, characterized in that, include: In the river section downstream of the dam site of the diversion-type hydropower station, the dewatering section and the target hydrodynamic model corresponding to the dewatering section are determined; The aquatic ecology of the dehydrated river section was analyzed to identify characteristic fish species; Based on the characteristic fish species, determine the ecological water depth of the dehydrated river section; Based on the dewatering-reduced river section, the ecological water depth, and the target hydrodynamic model, the ecological flow of the dewatering-reduced river channel for ecological connectivity restoration is determined, including: Determine the first length of the dehydrated river section; The topography of the dewatering river section is analyzed to determine whether there are any target river sections that cannot form ecological water depth channels under natural conditions. The dewatering river section includes several sub-river sections. Using the target hydrodynamic model and the ecological water depth, the second length corresponding to different discharge flows is simulated, specifically including: using the target hydrodynamic model, simulating the maximum water depth of each of the sub-river segments corresponding to different discharge flows; determining each target sub-river segment whose maximum water depth is less than the ecological water depth based on the maximum water depth of each sub-river segment and the ecological water depth; determining the sub-length of each target sub-river segment; and summing the sub-lengths of each target sub-river segment corresponding to different discharge flows to obtain the second length corresponding to different discharge flows. Based on the first length, the second length, and the existence of the target river section, the ecological flow of the dewatered river channel for ecological connectivity restoration is determined.

2. The method for determining the ecological flow of a dehydrated river channel according to claim 1, characterized in that: The determination of the target hydrodynamic model corresponding to the dehydrated river section includes: Obtain topographic survey data, hydrological test data, and hydrological data of the dewatering section; Based on the topographic survey data, an initial hydrodynamic model is established; Based on the hydrological survey data and the hydrological data, the initial hydrodynamic model is calibrated until the accuracy requirements are met, thus obtaining the target hydrodynamic model.

3. The method for determining the ecological flow of a dehydrated river channel according to claim 1, characterized in that: Determining the ecological water depth of the dehydrated river section based on the characteristic fish species includes: Determine the sexually mature body length of the characteristic fish species; The ecological water depth of the dehydrated river section is determined based on a preset multiple of the length of the sexually mature organism.

4. The method for determining the ecological flow of a dehydrated river channel according to claim 1, characterized in that: The step of determining the reduced-flow river ecological flow for ecological connectivity restoration based on the first length, the second length, and the existence of the target river section includes: If the target river segment exists, determine the third length of the target river segment; The difference between each of the second length and the third length is determined, and a first ratio of the difference to the first length is determined. Each of the first ratios is compared with a preset threshold to determine at least one first target flow rate corresponding to a first ratio that is less than the preset threshold. Select the dewatering river ecological flow for ecological connectivity restoration from at least one of the first target-directed flows.

5. The method for determining the ecological flow of a dehydrated river channel according to claim 1, characterized in that: The step of determining the reduced-flow river ecological flow for ecological connectivity restoration based on the first length, the second length, and the existence of the target river section includes: When the target river segment does not exist, determine the second ratio of each second length to the first length; Each of the second ratios is compared with a preset threshold to determine at least one second target flow rate corresponding to a second ratio that is less than the preset threshold. Select the dewatering channel ecological flow for ecological connectivity restoration from at least one of the second target-directed flows.

6. A device for determining the ecological flow of a dehydrated river channel, characterized in that, include: The first determining module is used to determine the dewatering section and the target hydrodynamic model corresponding to the dewatering section in the river section below the dam site of the diversion-type hydropower station. The second determining module is used to analyze the aquatic ecological conditions of the dehydrated river section and determine the characteristic fish species; The third determining module is used to determine the ecological water depth of the dehydrated river section based on the characteristic fish species. The fourth determining module is used to determine the ecological flow of the dewatered river channel for ecological connectivity restoration based on the dewatered river section, the ecological water depth, and the target hydrodynamic model, including: Determine the first length of the dehydrated river section; The topography of the dewatering river section is analyzed to determine whether there are any target river sections that cannot form ecological water depth channels under natural conditions. The dewatering river section includes several sub-river sections. Using the target hydrodynamic model and the ecological water depth, the second length corresponding to different discharge flows is simulated, specifically including: using the target hydrodynamic model, simulating the maximum water depth of each of the sub-river segments corresponding to different discharge flows; determining each target sub-river segment whose maximum water depth is less than the ecological water depth based on the maximum water depth of each sub-river segment and the ecological water depth; determining the sub-length of each target sub-river segment; and summing the sub-lengths of each target sub-river segment corresponding to different discharge flows to obtain the second length corresponding to different discharge flows. Based on the first length, the second length, and the existence of the target river section, the ecological flow of the dewatered river channel for ecological connectivity restoration is determined.

7. An electronic device, characterized in that, include: A processor and a memory, wherein instructions are stored in the memory and loaded and executed by the processor to implement the method as described in any one of claims 1-5.

8. A computer-readable storage medium storing a computer program therein, which, when executed, implements the method as described in any one of claims 1-5.

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