Determination method, device and equipment for ecological flow of water reducing and dewatering river channel and storage medium

Abstract

The invention provides a method, device and equipment for determining the ecological flow of a water reducing and dewatering river channel and a storage medium. According to the method for determining the ecological flow of the water reducing and dewatering river channel, a water reducing and dewatering river section and a target hydrodynamic model corresponding to the water reducing and dewatering river section are determined in river sections below a water diversion type hydropower station dam site; analyzing the aquatic ecological condition of the reduced and dehydrated river reach, determining characteristic fishes, determining the ecological water depth of the reduced and dehydrated river reach according to the characteristic fishes, determining the ecological flow of the reduced and dehydrated river channel for ecological connectivity restoration according to the reduced and dehydrated river reach, the ecological water depth and a target hydrodynamic model, and determining the ecological flow of the reduced and dehydrated river channel for ecological connectivity restoration by considering the factors of the characteristic fishes. And finally determining the ecological flow of the water reducing and dewatering river channel for ecological connectivity restoration, so that the determination of the ecological flow of the water reducing and dewatering river channel is more accurate.

Description

Technical Field

[0001] The present application relates to the field of hydrology, and in particular to a method, device, equipment and storage medium for determining the ecological flow of a dewatered river. Background Art

[0002] Nowadays, diversion hydropower stations have played a huge role in power generation, flood control and drought relief, etc. However, most diversion hydropower stations did not have ecological flow discharge facilities in the early stage, resulting in dehydration in the river section from the diversion hydropower station to the power plant. Long-term dehydration will lead to the disappearance of the original river ecosystem and serious degradation of the river ecosystem function. In addition, for rivers that have been in a state of dehydration for a long time, it is necessary to determine the ecological flow for restoration. At present, the habitat simulation method is usually used to determine the ecological flow, but the habitat simulation method only considers the size of the suitable habitat area, and does not consider the longitudinal passage of aquatic animals, that is, the longitudinal flow of the river ecological depth. Therefore, the determined ecological flow has deviations and low accuracy. Summary of the invention

[0003] The present application provides a method, device, equipment and storage medium for determining ecological flow of a dewatered river channel to solve at least one problem existing in the related art. The technical solution is as follows:

[0004] In a first aspect, an embodiment of the present application provides a method for determining an ecological flow rate of a dewatered river, comprising:

[0005] In a river section below a dam site of a water diversion hydropower station, determining a dewatering river section and determining a target hydrodynamic model corresponding to the dewatering river section;

[0006] Analyze the aquatic ecology of the dewatered river section and identify characteristic fish species;

[0007] Determining the ecological water depth of the dewatered river section according to the characteristic fish species;

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

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

[0010] Obtaining topographic survey data of the dewatered river section, hydrological test data during the water release test, and hydrological information data;

[0011] Establishing an initial hydrodynamic model based on the topographic survey data;

[0012] The initial hydrodynamic model is calibrated according to the hydrological test data and the hydrological data until the accuracy requirement is met to obtain a target hydrodynamic model.

[0013] In one embodiment, determining the ecological water depth of the dewatered river section according to the characteristic fish comprises:

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

[0015] The ecological water depth of the dehydrated river section is determined according to the preset multiples of the sexually mature body length.

[0016] In one embodiment, determining the ecological flow of the dewatered river channel for ecological connectivity restoration according to the dewatered river section, the ecological water depth, and the target hydrodynamic model includes:

[0017] Determining a first length of the dewatered river section;

[0018] Analyze the topographic conditions of the dewatered river section to determine whether there is a target river section where an ecological water depth channel cannot be formed under natural conditions;

[0019] By using the target hydrodynamic model and the ecological water depth, simulating the second length corresponding to different lowering flow rates;

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

[0021] In one embodiment, the dewatering river section includes a plurality of sub-river sections; the second length corresponding to the simulation of different dewatering flows through the target hydrodynamic model and the ecological water depth includes:

[0022] By means of the target hydrodynamic model, the maximum water depth of each of the sub-river sections corresponding to different discharge flows is simulated;

[0023] According to the maximum water depth of each sub-river section and the ecological water depth, determining each target sub-river section whose maximum water depth corresponding to different decentralization flows is smaller than the ecological water depth;

[0024] The sub-lengths of the target sub-river sections are determined, and the sub-lengths of the target sub-river sections corresponding to different lowering flow rates are accumulated to obtain second lengths corresponding to different lowering flow rates.

[0025] In one embodiment, determining the ecological flow of the dewatered river channel for ecological connectivity restoration based on the first length, the second length, and the existence of the target river section includes:

[0026] When the target river section exists, determining a third length of the target river section;

[0027] respectively determining a difference between each of the second lengths and the third lengths, and determining a first ratio of the difference to the first length;

[0028] Compare each of the first ratios with a preset threshold value, and determine at least one first target drop flow rate corresponding to a first ratio that is smaller than the preset threshold value;

[0029] An ecological flow of a dewatered river channel for restoration of ecological connectivity is selected from at least one of the first target downstream flows.

[0030] In one embodiment, determining the ecological flow of the dewatered river channel for ecological connectivity restoration based on the first length, the second length, and the existence of the target river section includes:

[0031] When the target river section does not exist, determining a second ratio of each second length to the first length respectively;

[0032] Compare each of the second ratios with a preset threshold value, and determine at least one second target release flow rate corresponding to a second ratio that is smaller than the preset threshold value;

[0033] The dewatered river ecological flow for ecological connectivity restoration is selected from at least one of the second target decentralization flows.

[0034] In a second aspect, an embodiment of the present application provides a device for determining ecological flow of a dewatered river, comprising:

[0035] The first determination module is used to determine the dewatering river section in the river section below the dam site of the water diversion hydropower station and determine the target hydrodynamic model corresponding to the dewatering river section;

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

[0037] A third determination module is used to determine the ecological water depth of the dewatering river section according to the characteristic fish;

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

[0039] In a third aspect, an embodiment of the present application provides an electronic device, comprising: a processor and a memory, wherein the memory stores instructions, and the instructions are loaded and executed by the processor to implement a method in any one of the above-mentioned embodiments.

[0040] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed, the method in any one of the above-mentioned embodiments is implemented.

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

[0042] By determining the dewatering section and the target hydrodynamic model corresponding to the dewatering section in the river section below the dam site of the diversion hydropower station, the aquatic ecological conditions of the dewatering section are analyzed and characteristic fish are determined. The ecological water depth of the dewatering section is determined based on the characteristic fish. The ecological flow of the dewatering river channel used for ecological connectivity restoration is determined based on the dewatering section, the ecological water depth and the target hydrodynamic model. The factor of characteristic fish, namely the longitudinal fluidity of the river ecological water depth, is considered to finally determine the ecological flow of the dewatering river channel used for ecological connectivity restoration, so that the determination of the ecological flow of the dewatering river channel is more accurate.

[0043] The above summary 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 the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0045] Figure 1 This is a schematic diagram of the steps of a method for determining ecological flow of a dewatered river channel according to an embodiment of the present application;

[0046] Figure 2 This is a structural block diagram of a device for determining ecological flow of a dewatered river channel according to an embodiment of the present application;

[0047] Figure 3 This is a structural block diagram of an electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0048] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0049] Reference Figure 1, a flow chart of a method for determining ecological flow of a dewatered river channel according to an embodiment of the present application is shown. The method for determining ecological flow of a dewatered river channel may at least include steps S100-S400:

[0050] S100, in a river section below the dam site of a water diversion hydropower station, determining a dewatering river section and determining a target hydrodynamic model corresponding to the dewatering river section.

[0051] S200. Analyze the aquatic ecology of the river section where water is reduced and dewatered, and identify characteristic fish species.

[0052] S300. Determine the ecological water depth of the river section where dehydration is reduced based on characteristic fish species.

[0053] S400. 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.

[0054] The method for determining the ecological flow of a dehydrated river channel in the embodiment of the present application can be executed by a terminal such as a computer, a mobile phone, a tablet, a vehicle-mounted terminal, or a cloud server. In the embodiment of the present application, the system execution in the terminal is taken as an example.

[0055] The technical solution of the embodiment of the present application determines a dewatering river section and a target hydrodynamic model corresponding to the dewatering river section in the river section below the dam site of a water diversion hydropower station, analyzes the aquatic ecological conditions of the dewatering river section, determines characteristic fish species, determines the ecological water depth of the dewatering river section based on the characteristic fish species, determines the ecological flow of the dewatering river channel for ecological connectivity restoration based on the dewatering river section, the ecological water depth and the target hydrodynamic model, takes into account the factor of characteristic fish species, namely the longitudinal fluidity of the river ecological water depth, and finally determines the ecological flow of the dewatering river channel for ecological connectivity restoration, so that the determination of the ecological flow of the dewatering river channel is more accurate.

[0056] In one embodiment, in the river section below the dam site of the diversion hydropower station, the actual operation data of the diversion hydropower station can be used to analyze the river section below the dam site where the flow is cut off or the flow is significantly reduced due to the water diversion of the diversion hydropower station, so as to determine the dewatered river section and the first length L1 of the dewatered river section, and input them into the system for subsequent calculations.

[0057] In one embodiment, determining the target hydrodynamic model corresponding to the dewatered river section in step S100 includes steps S110-S130:

[0058] S110, obtaining topographic survey data of the dewatered river section, hydrological test data during the water release test, and hydrological information data.

[0059] Optionally, topographic survey data of the dewatered river section, hydrological test data during the water release test, and hydrological information data may be obtained through aerial images, historical operation data of the diversion hydropower station, and Internet-related data.

[0060] S120. Establish an initial hydrodynamic model based on topographic survey data.

[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. Calibrate the initial hydrodynamic model according to the hydrological test data and the hydrological data until the accuracy requirement is met to obtain the target hydrodynamic model.

[0063] Optionally, based on the hydrological test data (including data such as actual downstream flow) and hydrological information data, the actual water level, water depth, flow rate, etc. of the hydrological test section or hydrological station are compared with the results of the initial hydrodynamic model simulation. If the difference exceeds 10%, the two-dimensional hydrodynamic model parameters are calibrated according to the hydrological test data until the difference does not exceed 10%, meeting the accuracy requirements. At this time, the initial hydrodynamic model is the target hydrodynamic model.

[0064] In one embodiment, the aquatic ecological conditions in the dewatering river section during the flood and dry seasons are determined based on manual collection or aerial photography, and then the aquatic ecological conditions are analyzed to determine the characteristic fish species of the dewatering river section.

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

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

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

[0068] S320. Determine the ecological water depth of the river section where dehydration is reduced based on the preset multiples of the sexually mature body length.

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

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

[0071] S410, determining a first length L1 of the dewatered river section.

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

[0073] S420. Analyze the topographic conditions of the dewatered river section to determine whether there is a target river section where it is impossible to form an ecological water depth channel under natural conditions.

[0074] Alternatively, based on aerial images during the flood and dry seasons and relevant data from on-site photography and surveys, it is possible to analyze the scattered boulders, roads formed later, and other conditions to determine whether there is a target river section that cannot form an ecological water depth channel (effective water surface width) under natural conditions. For example, a section of the riverbed below the dam site of a power station is naturally scattered with large boulders. Blocked by the boulders, even if the water inflow is large during the flood season, the water surface width formed in this section is not obvious, and this section has naturally become a channel for terrestrial animals on both sides. This section of the river that cannot form an ecological water depth channel under natural conditions even if the water inflow is large during the flood season is the target river section.

[0075] S430, simulating the second length corresponding to different lowering flow rates through the target hydrodynamic model and the ecological water depth.

[0076] First, a set of downstream flows can be set in advance, and each downstream flow in the set of downstream flows increases in sequence. The specific increment can be set based on actual conditions. Then, each different downstream flow in the set of downstream flows is input into the target hydrodynamic model, so that the maximum water depth of each sub-river section corresponding to different downstream flows can be simulated through the target hydrodynamic model. For example, the downstream flow is 5m 3 / s, statistics 5m 3 / s corresponds to the maximum water depth of each sub-river section, and the same applies to other downstream flows.

[0077] Secondly, according to the maximum water depth of each sub-river section and the ecological water depth, the target sub-river sections whose maximum water depths are less than the ecological water depths corresponding to different devolved flows are determined. Specifically, the maximum water depths of each sub-river section are compared with the ecological water depth D, and the target sub-river sections whose maximum water depths are less than the ecological water depth D are determined, thereby determining the target sub-river sections whose maximum water depths are less than the ecological water depths corresponding to different devolved flows.

[0078] Furthermore, the sub-lengths of each target sub-section are determined, and the sub-lengths of each target sub-section corresponding to different lowering flow rates are accumulated to obtain the second length L2 corresponding to different lowering flow rates. 3 / s corresponds to three target sub-river sections, then the sub-lengths of these three target sub-river sections are accumulated to determine the discharge flow of 5m 3 / s corresponding to the second length L2; assuming the flow rate is 10m 3 / s corresponds to five target sub-river sections, so the sub-lengths of these five target sub-river sections are accumulated to determine the downstream flow of 10m 3 Therefore, the second length L2 corresponding to different lowering flow rates can be determined.

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

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

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

[0082] S4402. Determine the difference between each second length and the third length respectively, and determine a 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 respectively, 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 value, and determine at least one first target drop flow corresponding to a first ratio that is smaller than the preset threshold value.

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

[0086] S4404. Select the ecological flow of the dewatered river channel for ecological connectivity restoration from at least one first target downstream flow.

[0087] Optionally, if there is only one first target decentralization flow, it is directly determined as the ecological flow of the dewatered river channel for ecological connectivity restoration; if there are multiple first target decentralization flows, the smallest first target decentralization flow can be selected as the ecological flow of the dewatered river channel for ecological connectivity restoration. For example, in the above example, a decentralization flow of 5m 3 / s as the ecological flow of dewatered river channels for ecological connectivity restoration.

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

[0089] S4405. When the target river section does not exist, determine the second ratio of each second length to the first length: L2 / L1.

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

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

[0092] S4407. Select the ecological flow of the dewatered river channel for ecological connectivity restoration from at least one second target decentralized flow.

[0093] Similarly, if there is only one second target flow, it is directly determined as the ecological flow of the dewatered river channel for ecological connectivity restoration; if there are multiple second target flow, the smallest second target flow can be selected as the ecological flow of the dewatered river channel for ecological connectivity restoration. For example, in the above example, a flow of 10m can be selected. 3 / s is used as the ecological flow for dewatering river channels for ecological connectivity restoration, and is also the ecological flow required to repair the longitudinal channels of aquatic animals.

[0094] The method of the embodiment of the present application introduces the concept of ecological connectivity restoration, so that the determination of the ecological flow of the dewatered river section is closer to the actual situation, has ecological significance, and provides a more accurate reference for the determination of the ecological flow of the dam site of the water diversion power station.

[0095] Reference Figure 2 , shows a structural block diagram of a device for determining ecological flow of a dewatered river channel according to an embodiment of the present application, the device may include:

[0096] The first determination module is used to determine the dewatering river section and the target hydrodynamic model corresponding to the dewatering river section in the river section below the dam site of the water diversion hydropower station;

[0097] The second determination module is used to analyze the aquatic ecological conditions of the dewatered river section and determine the characteristic fish;

[0098] The third determination module is used to determine the ecological water depth of the dewatered river section according to 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 each device in the embodiments of the present application can be found in the corresponding description in the above method, and will not be repeated here.

[0101] Reference Figure 3 , shows a structural block diagram of an electronic device according to an embodiment of the present application, the electronic device includes: a memory 310 and a processor 320, the memory 310 stores instructions that can be run on the processor 320, and the processor 320 loads and executes the instructions to implement the method for determining the ecological flow of a dewatered river channel in the above embodiment. The number of the memory 310 and the processor 320 can be one or more.

[0102] In one embodiment, the electronic device also includes a communication interface 330 for communicating with external devices and performing data exchange transmission. If the memory 310, the processor 320 and the communication interface 330 are implemented independently, the memory 310, the processor 320 and the communication interface 330 can be interconnected through a bus and complete mutual communication. The bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 3 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

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

[0104] An embodiment of the present application provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the method for determining the ecological flow of a dewatered river provided in the above embodiment.

[0105] An embodiment of the present application also provides a chip, which includes a processor for calling and executing instructions stored in the memory from the memory, so that a communication device equipped with the chip executes the method provided by the embodiment of the present application.

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

[0107] It should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc. It is worth noting that the processor may be a processor supporting the advanced RISC machines (ARM) architecture.

[0108] Further, optionally, the above-mentioned memory may include a read-only memory and a random access memory, and may also include a non-volatile random access memory. The memory may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may include a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may include a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available. For example, static RAM (SRAM), dynamic random access memory (DRAM), synchronous DRAM (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM) and direct rambus RAM (DR RAM).

[0109] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function according to the present application is generated in whole or in part. 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 transmitted from one computer-readable storage medium to another computer-readable storage medium.

[0110] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0111] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0112] Any process or method description in the flow chart or otherwise described herein can be understood to represent a module, fragment or portion of a code including one or more executable instructions for implementing the steps of a specific logical function or process. And the scope of the preferred embodiment of the present application includes other implementations, in which the functions may not be performed in the order shown or discussed, including in a substantially simultaneous manner or in a reverse order according to the functions involved.

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

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

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

[0116] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A method for determining the ecological flow of a dewatered river, characterized in that: include: In a river section below a dam site of a water diversion hydropower station, determining a dewatering river section and determining a target hydrodynamic model corresponding to the dewatering river section; Analyze the aquatic ecology of the dewatered river section and identify characteristic fish species; Determining the ecological water depth of the dewatered river section according to the characteristic fish species; The ecological flow of the dewatering river channel for ecological connectivity restoration is determined based on the dewatering river section, the ecological water depth and the target hydrodynamic model.

2. The method for determining the ecological flow of a dewatered river according to claim 1, characterized in that: Determining the target hydrodynamic model corresponding to the dewatering river section includes: Obtaining topographic survey data of the dewatered river section, hydrological test data during the water release test, and hydrological information data; Establishing an initial hydrodynamic model based on the topographic survey data; The initial hydrodynamic model is calibrated according to the hydrological test data and the hydrological data until the accuracy requirement is met to obtain a target hydrodynamic model.

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

4. The method for determining the ecological flow of a dewatered river according to any one of claims 1 to 3, characterized in that: The step of determining the ecological flow of the dewatering river channel for ecological connectivity restoration according to the dewatering river section, the ecological water depth and the target hydrodynamic model includes: Determining a first length of the dewatered river section; Analyze the topographic conditions of the dewatered river section to determine whether there is a target river section where an ecological water depth channel cannot be formed under natural conditions; By using the target hydrodynamic model and the ecological water depth, simulating the second length corresponding to different lowering flow rates; The ecological flow of the dewatered river channel for restoration of ecological connectivity is determined based on the first length, the second length and the existence of the target river section.

5. The method for determining the ecological flow of a dewatered river according to claim 4, characterized in that: The dewatering river section includes a plurality of sub-river sections; the second length corresponding to the simulation of different dewatering flows through the target hydrodynamic model and the ecological water depth includes: By means of the target hydrodynamic model, the maximum water depth of each of the sub-river sections corresponding to different discharge flows is simulated; According to the maximum water depth of each sub-river section and the ecological water depth, determining each target sub-river section whose maximum water depth corresponding to different decentralization flows is smaller than the ecological water depth; The sub-lengths of the target sub-river sections are determined, and the sub-lengths of the target sub-river sections corresponding to different lowering flow rates are accumulated to obtain second lengths corresponding to different lowering flow rates.

6. The method for determining the ecological flow of a dewatered river according to claim 4, characterized in that: The determining of the dewatered 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 section exists, determining a third length of the target river section; respectively determining a difference between each of the second lengths and the third lengths, and determining a first ratio of the difference to the first length; Compare each of the first ratios with a preset threshold value, and determine at least one first target drop flow rate corresponding to a first ratio that is smaller than the preset threshold value; An ecological flow of a dewatered river channel for restoration of ecological connectivity is selected from at least one of the first target downstream flows.

7. The method for determining the ecological flow of a dewatered river according to claim 4, characterized in that: The determining of the dewatered 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 section does not exist, determining a second ratio of each second length to the first length respectively; Compare each of the second ratios with a preset threshold value, and determine at least one second target release flow rate corresponding to a second ratio that is smaller than the preset threshold value; The dewatered river ecological flow for ecological connectivity restoration is selected from at least one of the second target decentralization flows.

8. A device for determining ecological flow of a dewatered river, characterized in that: include: The first determination module is used to determine the dewatering river section in the river section below the dam site of the water diversion hydropower station and determine the target hydrodynamic model corresponding to the dewatering river section; The second determination module is used to analyze the aquatic ecological conditions of the dewatered river section and determine characteristic fish; A third determination module is used to determine the ecological water depth of the dewatering river section according to the characteristic fish; The fourth determination module is used to determine the ecological flow of the dewatering river channel used for ecological connectivity restoration based on the dewatering river section, the ecological water depth and the target hydrodynamic model.

9. An electronic device, characterized in that: include: A processor and a memory, wherein the memory stores instructions, and the instructions are loaded and executed by the processor to implement the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, wherein a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method according to any one of claims 1 to 7 is implemented.

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