River ecological corridor boundary determination method and device and storage medium

Abstract

The invention provides a river ecological corridor boundary determination method and device and a storage medium, and the method comprises the steps: obtaining the types, densities and biomass of inland organisms and water organisms which often inhabit in a river management range in a research region, and determining the respective key indicator species of the inland organisms and the water organisms in the research region; determining requirements of key indicator species; obtaining a relation curve of river gallery boundary-key indicator species diversity; constructing a region-typical river reach two-dimensional habitat model, and obtaining spatial distribution and migration path information of each key indication species in a river ecosystem; preliminarily determining a boundary threshold value of the ecological corridor of the river; determining a water area corridor boundary of the river ecological corridor; determining a land area corridor boundary of the river ecological corridor; and determining a river ecological corridor boundary based on the water area corridor boundary and the land area corridor boundary of the river ecological corridor. By adopting the determination method provided by the invention, the river ecological corridor boundary can be determined more reasonably and quickly.

Description

Technical Field

[0001] The present invention relates to the technical field of river and lake ecological restoration, and in particular to a method, device and storage medium for determining the boundary of a river ecological corridor. Background Art

[0002] The concept of ecological corridor is consistent with that of "green corridor". It is a special representation form of the concept of patch in landscape ecology, and is often manifested in linear or strip-shaped landscape ecological space systems in the ecological environment. River ecological corridor refers to the river itself and the vegetation belt distributed along the river that is different from the surrounding matrix, including river channels, floodplains, riverbank vegetation and some highlands. It has the functions of promoting biological diffusion and migration, improving biodiversity, preventing soil erosion and regulating microclimate. However, under the background of strong interference from human activities such as water resource development and urbanization, the structure and function of river ecosystems have been damaged, and biodiversity has declined significantly. Ensuring a reasonable ecological corridor range is an effective means to protect and restore biodiversity. However, existing methods often ignore the ecological needs of key species, resulting in unsatisfactory actual protection effects of ecological corridors.

[0003] Therefore, a method, device and storage medium for determining the boundary of a river ecological corridor are needed to at least partially solve the above technical problems. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a method, device and storage medium for determining the boundary of a river ecological corridor, so as to solve at least one of the problems in the prior art.

[0005] In a first aspect, an embodiment of the present invention provides a method for determining the boundary of a river ecological corridor, the method comprising:

[0006] Based on the sky-air-ground integrated ecological monitoring system, relevant literature research, historical data and / or expert consultation information in the study area, obtain the species of terrestrial and aquatic organisms that often inhabit the river management area in the study area, their density and biomass, and determine the key indicator species of terrestrial and aquatic organisms in the study area based on the key indicator species screening indicators;

[0007] Determine the requirements of key indicator species based on the habitat types, food chains and food webs required for different life cycles;

[0008] Based on the historical data of river corridor width, density and biomass of key indicator species, the relationship curve between river corridor boundary and key indicator species diversity was obtained;

[0009] Based on the topographic and geomorphic and hydrological data of the study area, combined with the requirements of the key indicator species, a two-dimensional habitat model of the region - typical river reaches is constructed, and based on the two-dimensional habitat model, the spatial distribution and migration path information of each key indicator species in the river ecosystem are obtained;

[0010] Based on the relationship curve of the river corridor boundary - key indicator species diversity and the spatial distribution and migration path information of each key indicator species in the river ecosystem, with the goal of enhancing biodiversity and taking the non - interruption of the migration path as a restrictive condition, the boundary threshold of the river ecological corridor is preliminarily determined;

[0011] Obtain the quantitative relationship between the water surface area of the river and the area of the suitable habitat for the key indicator species of aquatic organisms, and determine the water corridor boundary of the river ecological corridor with the condition that the area of the suitable habitat in different life cycles is the largest;

[0012] Establish the connection between the threat factors generated by human activities and the quality of the terrestrial habitat, obtain the distribution characteristics of the terrestrial habitat quality in the study area, and determine the terrestrial corridor boundary of the river ecological corridor when the change rate of the distribution characteristics of the terrestrial habitat quality in the study area is lower than the preset value;

[0013] Based on the water corridor boundary and the terrestrial corridor boundary of the river ecological corridor, combined with the boundary threshold of the river ecological corridor, the boundary of the river ecological corridor is finally determined.

[0014] In a second aspect, an embodiment of the present invention also provides a device for determining the boundary of a river ecological corridor, and the determining device includes:

[0015] A memory for storing computer - executable instructions;

[0016] A processor for implementing the determination method of the above - mentioned technical solution when executing the computer - executable instructions stored in the memory.

[0017] In a third aspect, an embodiment of the present invention also provides a storage medium storing computer instructions, wherein the computer instructions are used to cause the computer to execute the determination method of the above - mentioned technical solution.

[0018] According to the determination method of the present invention, by considering the requirements of key indicator species and using the relationship curve of the river corridor boundary - key indicator species diversity, the spatial distribution and migration path information of each key indicator species in the river ecosystem, etc., the boundary of the river ecological corridor can be reasonably and quickly determined, ensuring a reasonable ecological corridor range and improving the actual protection effect of the river ecological corridor.

[0019] Additional advantages, objects, and features of the present invention will be partly set forth in the description which follows, and in part will become obvious to those having ordinary skill in the art upon examination of the following, or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained by the structure particularly pointed out in the specification and the drawings.

[0020] Those skilled in the art will understand that the objects and advantages that can be achieved by the present invention are not limited to those specifically described above, and the above and other objects that the present invention can achieve will be more clearly understood from the following detailed description. Brief Description of the Drawings

[0021] The drawings described herein are used to provide a further understanding of the present invention, and form a part of this application, and do not limit the present invention. The components in the drawings are not drawn to scale, but are only for showing the principles of the present invention. For the convenience of showing and describing some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, may become larger relative to other components in the exemplary device actually manufactured according to the present invention. In the drawings:

[0022] Figure 1 is a flowchart of a determination method according to an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of an ecological flow process line in a determination method according to an embodiment of the present invention;

[0024] Figure 3 is the explanatory degree of the landscape pattern factors of the Wenyu River ecological corridor on the overall birds in a determination method according to an embodiment of the present invention;

[0025] Figure 4 is a topographic map of a two-dimensional habitat model in a determination method according to an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of the quantitative relationship between the river water surface area and the suitable habitat area of the ayu population in a determination method according to an embodiment of the present invention;

[0027] Figure 6 is a relationship curve between the suitable habitat area of the ayu population and the river flow in a determination method according to an embodiment of the present invention;

[0028] Figure 7 is a schematic diagram of the change of the river corridor under different flows in a determination method according to an embodiment of the present invention;

[0029] Figure 8 is a schematic diagram of a determination device according to an embodiment of the present invention;

[0030] Figure 9Schematic diagram of a determination system according to an embodiment of the present invention. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the implementation manners and the accompanying drawings. Herein, the illustrative implementation manners of the present invention and their descriptions are used to explain the present invention, but do not limit the present invention.

[0032] Herein, it should also be noted that in order to avoid obscuring the present invention due to unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the drawings, while other details less related to the present invention are omitted.

[0033] It should be emphasized that the term "comprising / including" when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0034] Herein, it should also be noted that if not otherwise specified, the term "connection" herein can refer not only to direct connection, but also to indirect connection with an intermediate.

[0035] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0036] First, reference will be made to Figure 1 Describe a method 100 for determining the boundary of a river ecological corridor according to an embodiment of the present application. As Figure 1 shown, the determination method 100 may include steps S110 to S180, specifically as follows:

[0037] In step S110, based on the sky-air-ground integrated ecological monitoring system of the study area, relevant literature research, historical data and / or expert consultation information, obtain the types, densities and biomasses of the terrestrial organisms and aquatic organisms that often inhabit the land area within the river management scope of the study area, and determine the key indicator species of the terrestrial organisms and aquatic organisms in the study area respectively based on the key indicator species screening indicators.

[0038] In step S120, determine the requirements of the key indicator species based on the habitat types required in different life cycles, food chains and food webs.

[0039] In step S130, based on the historical data of the river corridor width, key indicator species density and biomass, obtain the relationship curve between the river corridor boundary and the key indicator species diversity.

[0040] In step S140, based on the topographic and geomorphic features and hydrological data of the study area, and in combination with the requirements of the key indicator species, a two-dimensional habitat model of the region - typical river reaches is constructed, and based on the two-dimensional habitat model, the spatial distribution and migration path information of each key indicator species in the river ecosystem are obtained.

[0041] In step S150, based on the relationship curve between the river corridor boundary - key indicator species diversity and the spatial distribution and migration path information of each key indicator species in the river ecosystem, with the goal of enhancing biodiversity and taking the non-blocking of the migration path as a restrictive condition, the boundary threshold of the river ecological corridor is preliminarily determined.

[0042] In step S160, the quantitative relationship between the river water surface area and the area of the suitable habitat for the key indicator species of aquatic organisms is obtained, and with the condition that the area of the suitable habitat in different life cycles is the largest, the water corridor boundary of the river ecological corridor is determined.

[0043] In step S170, the connection between the threat factors generated by human activities and the quality of the terrestrial habitat is established, the distribution characteristics of the terrestrial habitat quality in the study area are obtained, and when the change rate of the distribution characteristics of the terrestrial habitat quality in the study area is lower than the preset value, the terrestrial corridor boundary of the river ecological corridor is determined.

[0044] In step S180, based on the water corridor boundary and the terrestrial corridor boundary of the river ecological corridor, and in combination with the boundary threshold of the river ecological corridor, the boundary of the river ecological corridor is finally determined.

[0045] In the embodiment of the present application, first, through various monitoring and investigation means, the types, densities, and biomasses of the terrestrial organisms and aquatic organisms that often inhabit the land within the river channel management scope in the study area are obtained. Based on the key indicator species screening indicators, the key indicator species of the terrestrial organisms and aquatic organisms in the study area are determined respectively, and the requirements of the key indicator species are determined. Then, the relationship curve between the river corridor boundary - key indicator species diversity is obtained. Then, a two-dimensional habitat model of the region - typical river reaches is constructed. Based on the two-dimensional habitat model, the spatial distribution and migration path information of each key indicator species in the river ecosystem are obtained. Then, based on the relationship curve between the river corridor boundary - key indicator species diversity and the spatial distribution and migration path information of each key indicator species in the river ecosystem, with the goal of enhancing biodiversity and taking the non-blocking of the migration path as a restrictive condition, the boundary threshold of the river ecological corridor is preliminarily determined. Then, the water corridor boundary and the terrestrial corridor boundary of the river ecological corridor are obtained respectively. Finally, the boundary of the river ecological corridor is determined in combination with the boundary threshold of the river ecological corridor.

[0046] As can be seen from the above description of the process, according to the determination method 100 of the embodiments of the present application, by considering the needs of key indicator species, the boundaries of river ecological corridors can be reasonably and quickly determined, ensuring a reasonable ecological corridor range and improving the actual protection effect of river ecological corridors.

[0047] Among them, in Figure 1 Steps S110 to S180 are shown to be arranged in sequence one after another, which is only an example. It can be understood that there is no limitation on the order between certain steps. For example, step S170 can be before step S160, or the two can be carried out simultaneously in parallel.

[0048] The content of each of the above steps of the determination method 100 according to the embodiments of the present application will be specifically described below.

[0049] In the embodiments of the present application, in step S110, based on the sky-ground-air integrated ecological monitoring system of the study area, relevant literature research, historical data, and / or expert consultation information, the types, densities, and biomasses of the terrestrial organisms and aquatic organisms that often inhabit the land area within the river management scope of the study area are obtained, and the key indicator species of the terrestrial organisms and aquatic organisms in the study area are determined based on the key indicator species screening indicators.

[0050] Specifically, according to standards such as "Technical Guidelines for Aquatic Ecology Monitoring - Monitoring and Evaluation of Aquatic Organisms in Rivers (Trial)" (HJ 1295—2023), "Technical Guidelines for Remote Sensing Survey of Biological Diversity (Terrestrial Ecosystems)", and "Technical Guidelines for the Protection and Restoration of River and Lake Ecosystems", through the sky-ground-air integrated ecological monitoring system, relevant literature research, sorting out historical data, expert consultation, etc., clarify the types, densities, and biomasses of the terrestrial organisms, aquatic (hydrophytic) organisms, etc. that often inhabit the land area within the river management scope of the study area. Ecological monitoring can be mainly divided into the monitoring of riparian vegetation, riparian animals, aquatic plants, and aquatic animals.

[0051] Among them, through the monitoring of the sky-ground-air integrated ecological monitoring system, generally speaking, it generally includes using satellite remote sensing technology to monitor the types, structures, and functions of the entire basin ecosystem of the study area; using unmanned aerial vehicles and RTK (Real-time kinematic) for monitoring at the river section scale and geomorphic unit scale, etc.

[0052] For the selection of monitoring sections of riparian zone vegetation, the ecological function zoning, hydrological characteristics, vegetation types, land use changes, and the impact of human activities should be comprehensively considered to ensure the selection of representative areas that reflect the health status of the ecosystem. For the selection of monitoring sections of riparian zone animals, the habitat types (such as water boundaries, wetlands, vegetation areas, etc.), hydrological changes (such as water level fluctuations, seasonal wetlands), climatic conditions, and the interference of human activities should be comprehensively considered. At the same time, attention should be paid to species diversity and ecological function zoning to comprehensively evaluate the dynamic changes of animal communities. For the selection of monitoring sections of aquatic plants, the water body types, hydrological characteristics (such as water level fluctuations, flow velocity), water quality conditions (such as eutrophication degree), vegetation types and distributions should be comprehensively considered, and the impact of human activities should be considered to ensure that the monitoring points can represent the typical characteristics of the water ecosystem. For the selection of monitoring sections of aquatic animals, special attention should be paid to the water body types, hydrological characteristics, water quality conditions, habitat diversity, and the impact of human activities. Key representative habitats should be selected, such as areas with significant water flow changes, waters affected by eutrophication or pollution, and important wetlands and water transition zones with important ecological functions, so as to provide a scientific basis for ecological protection and restoration.

[0053] Then, based on the screening principles such as rare and endangered, importance, and economic value, a screening index system for key indicator species was constructed (see Table 1), and the specific screening conditions can be adjusted and supplemented according to the actual situation. Finally, a variety of methods such as the analytic hierarchy process (AHP) and factor analysis method were used to screen the key indicator species in the study area. The analytic hierarchy process (AHP) is a multi-criteria decision-making method used for optimization in complex situations. For example, when screening fish, first construct a hierarchical structure to determine the objectives and screening criteria (such as living environment, economic value, distribution range, etc.), and then a judgment matrix can be established through expert evaluation, etc., to calculate the weights of each criterion. Then, based on the weight values, a comprehensive evaluation and ranking of each fish are carried out, and finally the fish with the highest score is selected. This method helps decision-makers clarify the priority of each factor and make a reasonable choice. For example, in the study on the selection of target fish based on ecological flow in the main stream of the Huaihe River, the analytic hierarchy process was used, combined with the supplementary target fish screening principles in Table 1, to construct a judgment matrix for target fish (see Table 2). The calculation results show that the sorting weight value of bream is the highest, so it is considered that bream can better represent the habitat requirements of fish in the Huaihe River and has strong ecological representativeness. For example, taking the Hutuo River as an example, the eDNA technology was combined with the analytic hierarchy process to successfully screen four target fish species. Based on the ecological habits of the four fish species at different life cycles, the relationship between the habitat requirements of different fish and the ecological flow was explored, and an ecological flow process line of the study area was constructed (for reference Figure 2 )

[0054] Table 1 Screening Principles for Key Species in Terrestrial and Aquatic Areas

[0055]

[0056] Table 2 Judgment Matrix of Target Fishes in the Main Stream of the Huaihe River

[0057]

[0058]

[0059] In the embodiment of the present application, in step S120, based on the habitat types, food chains, and food webs required in different life cycles, the requirements of key indicator species are determined.

[0060] Specifically, by means of behavioral experiments, literature research, etc. on key indicator species, the habitat types required in different life cycles and the suitability preference curves of water temperature, water flow, food resources, etc. are quantitatively clarified. By observing and recording the behavioral patterns of key indicator species under different environmental conditions and combining the existing research results in the literature, the requirements of the species can be understood more accurately. In addition, a complex food web theoretical model is introduced to comprehensively consider the requirements of key species and identify the positions of key species in the food chain and food web. For example, there is a rare and endangered fish, the ayu, in the Mulanxi River Basin. The life cycle of this fish can be divided into anadromous migration (March - May), fattening (June - August), spawning (September - October), catadromous migration (November - December), and overwintering (January - February). The habitat environmental types and feeding habits required in different life cycles are different. During the anadromous migration stage, the ayu needs an environment with fast and shallow water flow; during the fattening stage, it needs rich food resources to accumulate energy; during the spawning stage, it needs a suitable breeding place and an environment to protect fry. Taking the Hutuo River, which lacks rare and endemic fish, as an example, based on the water depth (H) and flow velocity (V) requirements of the representative fish, silver carp, in different life cycles, as shown in Table 3, the ecological flow process of the Hutuo River is explored.

[0061] Table 3 Suitable Water Depth and Flow Velocity of Silver Carp in Different Life Cycles

[0062]

[0063] In the embodiment of the present application, in step S130, based on the historical data of the river corridor width, key indicator species density, and biomass, the relationship curve between the river corridor boundary and key indicator species diversity is obtained.

[0064] Specifically, based on historical data such as river corridor width, density and biomass of key indicator species, mathematical statistical methods such as linear regression, correlation analysis and redundancy analysis are used to fit and analyze the relationship curve between the river corridor boundary and the diversity of key indicator species. Linear regression helps to clarify the linear relationship between the river corridor width and the diversity of key indicator species; while correlation analysis can reveal whether there are other non-linear associations between the two. Redundancy analysis (RDA) combines multiple regression analysis and principal component analysis (PCA) to explore the relationship between multiple response variables (e.g., species abundance) and one or more sets of explanatory variables (e.g., environmental factors). Through this method, RDA can effectively identify the multi-dimensional impact of environmental factors on the change of species abundance, thus providing a strong quantitative basis for ecological management. Taking the Wenyu River ecological corridor in Beijing as an example, the redundancy analysis method (RDA) is used to analyze the correlation between the composition characteristics of bird species and multi-scale environmental factors. The results show that the landscape pattern environmental factors within 50-200m have the highest explanatory degree for the overall composition of bird species in the corridor, see Figure 3 .

[0065] In the embodiment of the present application, in step S140, based on the topographic and geomorphic and hydrological data of the study area, combined with the needs of the key indicator species, a two-dimensional habitat model of the region - typical river section is constructed, and based on the two-dimensional habitat model, the spatial distribution and migration path information of each key indicator species in the river ecosystem are obtained.

[0066] Specifically, on the basis of historical data analysis, the monitoring and analysis of data such as the topographic and geomorphic and hydrological conditions of the region are carried out, the needs of key species are considered as a whole, and their suitability preference curves are generated. Then, a two-dimensional habitat model of the region - typical river section is constructed (see Figure 4 ), and the spatial distribution and migration paths of different species in the river ecosystem are quantitatively analyzed. Taking the Mulan River in Fujian Province as an example, taking the endangered fish Plecoglossus altivelis in the region as the key indicator species, combined with the collected and sorted data such as topographic and geomorphic and hydrodynamic conditions, a two-dimensional hydrodynamic model is used to simulate and analyze the water depth and flow velocity distribution in the study area under different hydrological conditions. Based on the needs of the target fish, a suitability index for the target fish is constructed using Matlab software, and the quantitative relationship between the water surface area and the suitable habitat area of the Plecoglossus altivelis population can be intuitively displayed using ArcGIS software ( Figure 5 ).

[0067] In the embodiment of the present application, in step S150, based on the relationship curve between the river corridor boundary - key indicator species diversity and the spatial distribution and migration path information of each key indicator species in the river ecosystem, with the goal of enhancing biodiversity and taking the non-blocking of the migration path as a restrictive condition, the boundary threshold of the river ecological corridor is preliminarily determined.

[0068] Specifically, taking the Mulan River in Fujian Province as an example, when Q = 56 m 3 / s, the suitable habitat area of ayu is the largest ( Figure 6 ), and the changes of river corridors under different flows are visually displayed through ArcGIS software ( Figure 7 ), and its suitable boundary is preliminarily determined.

[0069] Continuing from the above, the river ecological corridor can be divided into a water area part and a land area part. On the basis of the restoration of biodiversity in the study area, considering the sustainability of social and economic development and the accessibility of water quality objectives as a whole, systematically analyzing factors such as flood pulses, hydrodynamic cycles, pollutant self-purification, changes in land use types, and urban construction in the river corridor, adhering to the three major principles of "ecological green, intensive coordination, and sustainable development", using a multi-objective optimization algorithm to balance the needs of ecological protection and economic development, and combining the ArcGIS software and the InVEST model toolset, so as to qualitatively and quantitatively optimize and adjust the boundary of the river ecological corridor.

[0070] Among them, the boundary of the water area part will change dynamically under different flows. Under different flow conditions, the changes in hydrological characteristics such as river depth and flow velocity directly affect the spatial distribution, reproduction, habitat, survival, and migration paths of different species in the water area. Therefore, in order to determine the boundary of the river ecological corridor, the water area corridor boundary and the land area corridor boundary in the river ecological corridor can be determined respectively, specifically including step S160 and step S170.

[0071] In the embodiment of the present application, in step S160, the quantitative relationship between the river water surface area and the suitable habitat area of the key indicator species of water area organisms is obtained. For example, the ArcGIS software can be used to obtain the quantitative relationship between the river water surface area and the suitable habitat area of the key indicator species of water area organisms through spatial analysis. Then, taking the condition that the suitable habitat area is the largest in different life cycles as the condition, the water area corridor boundary of the river ecological corridor is determined.

[0072] In the embodiment of the present application, in step S170, the connection between the threat factors generated by human activities and the land habitat quality is established, and the distribution characteristics of the land habitat quality in the study area are obtained, and the land area corridor boundary of the river ecological corridor is determined when the change rate of the distribution characteristics of the land habitat quality in the study area is lower than the preset value.

[0073] Specifically, the ecological quality of the land area is significantly affected by different human activities, such as mining, agriculture, pollution emissions, and grazing, etc. These activities directly change the quality of the river land corridor habitat. To evaluate the impact of different human activities on the habitat quality, this article uses the InVEST model for quantitative analysis.

[0074] The InVEST model is mainly used to evaluate the impacts of human activities such as construction land, roads, mining land, farmland, water pollution, and grazing on the habitat degradation of riverine terrestrial corridors. The habitat quality module of the InVEST model is based on land use type data, establishing the connection between threat factors generated by human activities and habitat quality, analyzing the influence degree and sensitivity of external threat factors to habitats, so as to obtain the distribution characteristics of habitat quality in the study area. Its calculation formula is as follows:

[0075] The distribution characteristics Q of terrestrial habitat quality in the study area xj , specifically referring to:

[0076]

[0077] Among them, Z is the normalization constant, with a value of 2.5, and H j field represents the habitat suitability of land use type j; Q xj represents the habitat quality of grid x in land use type j; D xj represents the degree of habitat degradation of grid x in land use type j; K is the half-saturation constant, with a default value of 0.5.

[0078]

[0079] Among them, Y r represents the number of grids on the threat factor layer r; w r represents the weight of the threat factor; R represents the number of threat factors; r is the threat factor of the habitat; β x represents the accessible level of grid x; r y represents the influence degree of threat factor r on grid y, with a value between 0 and 1; i rxy represents the influence of threat factor r on the habitat of grid x on grid y; S jr represents the sensitivity of land use type j to threat factor r.

[0080]

[0081] Among them, d rmax represents the maximum influence distance of threat factor r, and d xy represents the linear distance between grid x and y.

[0082] After obtaining the distribution characteristics Q of terrestrial habitat quality in the study area xj , calculate the change rate of the distribution characteristics of terrestrial habitat quality in the study area, that is, the change rate relative to the width of the terrestrial corridor. When this change rate is lower than the preset value, for example, close to or equal to zero, the terrestrial corridor boundary of the river ecological corridor is determined according to the corresponding width of the terrestrial corridor at this time.

[0083] Of course, before performing step S170, it is necessary to preprocess the land part of the river ecological corridor into grid units to obtain each grid.

[0084] In the embodiment of the present application, in step S180, based on the water corridor boundary and land corridor boundary of the river ecological corridor, combined with the river ecological corridor boundary threshold, the river ecological corridor boundary is finally determined.

[0085] Specifically, according to the separately determined water corridor boundary and land corridor boundary of the river ecological corridor, the final river ecological corridor boundary is determined by superposition, but it shall not exceed the river ecological corridor boundary threshold.

[0086] Based on the above description, according to the determination method of the embodiment of the present application, by considering the needs of key indicator species, the river ecological corridor boundary can be reasonably and quickly determined, ensuring a reasonable ecological corridor range and improving the actual protection effect of the river ecological corridor.

[0087] Reference Figure 8 , the embodiment of the present application also provides a determination device 200 for implementing the determination method 100 according to the embodiment of the present application. The determination device 200 includes a processor 210 and a memory 220. The determination device 200 may include one or more processors 210 and one or more memories 220. The memory 220 stores an executable program run by the processor 210. When the executable program is run by the processor 210, the processor 210 executes the determination method 100 according to the embodiment of the present application described above.

[0088] The processor 210 may be a central processing unit (CPU) or other forms of processing units with data processing capabilities and / or instruction execution capabilities.

[0089] The memory 220 may include one or more computer program products, and the computer program products may include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may include, for example, random access memory (RAM) and / or cache memory, etc. The non-volatile memory may include, for example, read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computer-readable storage medium, and the processor 210 may run the program instructions to implement the client functions (implemented by the processor) and / or other desired functions in the embodiment of the present application described herein. Various application programs and various data may also be stored in the computer-readable storage medium, such as various data used and / or generated by the application programs, etc.

[0090] The determining device 200 may further include an input device and an output device, and these components are interconnected through a bus system and / or other forms of connection mechanisms. It should be noted that Figure 8 The components and structures of the illustrated determining device 200 are merely exemplary and not restrictive. According to requirements, the determining device 200 may also have other components and structures.

[0091] The input device may be a device used by a user to input instructions, and may include one or more of a keyboard, a mouse, a microphone, a touch screen, etc. In addition, the input device may also be any interface for receiving information.

[0092] The output device may output various information (such as images or sounds) to the outside (such as the user), and may include one or more of a display, a speaker, etc. In addition, the output device may also be any other device with an output function.

[0093] Exemplarily, the exemplary determining device 200 for implementing the determining method 100 according to the embodiments of the present application may be applied to electronic devices such as terminal devices (such as mobile phones), tablet computers, laptop computers, ultra-mobile personal computers (UMPCs), handheld computers, netbooks, personal digital assistants (PDAs), wearable devices (such as smart watches, smart glasses or smart helmets, etc.), augmented reality (AR), virtual reality (VR) devices, smart home devices, in-vehicle computers, etc. The embodiments of the present application do not impose any restrictions on this.

[0094] Those skilled in the art can understand the specific operations of the determining device 200 for implementing the determining method 100 according to the embodiments of the present application in combination with the content described above. For the sake of brevity, specific details are not described here, and only some main operations of the processor 210 are described.

[0095] In one embodiment of the present application, when the executable program is run by the processor 210, the processor 210 is caused to perform the following steps: Based on the sky-air-ground integrated ecological monitoring system of the study area, relevant literature research, historical data, and / or expert consultation information, obtain the types, densities, and biomasses of the terrestrial organisms and aquatic organisms that often inhabit the land area within the river management scope of the study area, and determine the respective key indicator species of the terrestrial organisms and aquatic organisms in the study area based on the key indicator species screening criteria; Based on the habitat types, food chains, and food webs required for different life cycles, determine the requirements of the key indicator species; Based on the historical data of the river corridor width, key indicator species density, and biomass, obtain the relationship curve between the river corridor boundary and key indicator species diversity; Based on the topographic and geomorphic features and hydrological data of the study area, combine the requirements of the key indicator species to construct a two-dimensional habitat model of the region-typical river section, and obtain the spatial distribution and migration path information of each key indicator species in the river ecosystem based on the two-dimensional habitat model; Based on the relationship curve between the river corridor boundary and key indicator species diversity and the spatial distribution and migration path information of each key indicator species in the river ecosystem, with the goal of enhancing biodiversity and taking the non-blocking of the migration path as a restrictive condition, preliminarily determine the boundary threshold of the river ecological corridor; Use ArcGIS software to obtain the quantitative relationship between the river water surface area and the suitable habitat area of the key indicator species of aquatic organisms through spatial analysis, and determine the water corridor boundary of the river ecological corridor with the condition that the suitable habitat area for different life cycles is the largest; Use the InVEST model to establish the connection between the threat factors generated by human activities and the terrestrial habitat quality based on the land use type data, obtain the distribution characteristics of the terrestrial habitat quality in the study area, and determine the land corridor boundary of the river ecological corridor when the change rate of the distribution characteristics of the terrestrial habitat quality in the study area is lower than the preset value; Based on the water corridor boundary and land corridor boundary of the river ecological corridor, combined with the boundary threshold of the river ecological corridor, finally determine the boundary of the river ecological corridor.

[0096] The above exemplarily shows the determination method 100 according to the embodiments of the present application. Next, in combination with Figure 9 describe the determination system 300 provided in another aspect of the embodiments of the present application.

[0097] Refer to Figure 9 to describe the exemplary determination system 300 for implementing the determination method of the embodiments of the present application. The determination system 300 may include a key indicator species determination module 310, a requirement determination module 320, a relationship curve determination module 330, a migration path acquisition module 340, a boundary threshold determination module 350, a water corridor boundary determination module 360, a land corridor boundary determination module 370, and an ecological corridor boundary determination module 380. Among them:

[0098] The key indicator species determination module 310 is used to: obtain the types, densities, and biomasses of the terrestrial and aquatic organisms that often inhabit the land area within the river management scope in the study area based on the sky-air-ground integrated ecological monitoring system, relevant literature research, historical data, and / or expert consultation information in the study area, and determine the key indicator species of the terrestrial and aquatic organisms in the study area respectively based on the key indicator species screening criteria.

[0099] The demand determination module 320 is used to: determine the demands of the key indicator species based on the habitat types, food chains, and food webs required in different life cycles.

[0100] The relationship curve determination module 330 is used to: obtain the relationship curve between the river corridor boundary and the key indicator species diversity based on the historical data of the river corridor width, key indicator species density, and biomass.

[0101] The migration path acquisition module 340 is used to: construct a two-dimensional habitat model of the region - typical river section based on the topography and hydrological data of the study area and in combination with the demands of the key indicator species, and obtain the spatial distribution and migration path information of each key indicator species in the river ecosystem based on the two-dimensional habitat model.

[0102] The boundary threshold determination module 350 is used to: preliminarily determine the boundary threshold of the river ecological corridor with the improvement of biodiversity as the goal and the non-blocking of the migration path as the restrictive condition based on the relationship curve between the river corridor boundary and the key indicator species diversity and the spatial distribution and migration path information of each key indicator species in the river ecosystem.

[0103] The water corridor boundary determination module 360 is used to: obtain the quantitative relationship between the water surface area of the river and the suitable habitat area of the key indicator species of aquatic organisms, and determine the water corridor boundary of the river ecological corridor with the condition that the suitable habitat area in different life cycles is the largest.

[0104] The land corridor boundary determination module 370 is used to: establish the connection between the threat factors generated by human activities and the land habitat quality, obtain the distribution characteristics of the land habitat quality in the study area, and determine the land corridor boundary of the river ecological corridor when the change rate of the distribution characteristics of the land habitat quality in the study area is lower than the preset value.

[0105] The ecological corridor boundary determination module 380 is used to: finally determine the river ecological corridor boundary based on the water corridor boundary and land corridor boundary of the river ecological corridor in combination with the river ecological corridor boundary threshold.

[0106] The determination system 300 proposed in the embodiments of the present invention can reasonably and quickly determine the boundaries of river ecological corridors by considering the needs of key indicator species and using the relationship curve between the river corridor boundary and key indicator species diversity, the spatial distribution and migration path information of each key indicator species in the river ecosystem, ArcGIS software, InVEST model, etc.

[0107] In addition, according to the embodiments of the present application, the present application also provides a storage medium on which a computer program is stored, and when the computer program is run by a processor, it is used to execute the corresponding steps of the determination method 100 of the embodiments of the present application. The storage medium may include, for example, a memory card of a smart phone, a storage component of a tablet computer, a hard disk of a personal computer, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable compact disc read-only memory (CD-ROM), a USB memory, or any combination of the above storage media. The computer-readable storage medium may be any combination of one or more computer-readable storage media.

[0108] In addition, according to the embodiments of the present application, the present application also provides a computer program product including computer instructions, and when the computer instructions are executed by a processor, the steps of the determination method 100 of the embodiments of the present application are implemented.

[0109] Although example embodiments have been described herein with reference to the drawings, it should be understood that the above example embodiments are merely exemplary and are not intended to limit the scope of the present application. Those of ordinary skill in the art can make various changes and modifications therein without departing from the scope and spirit of the present application. All such changes and modifications are intended to be included within the scope of the present application as claimed in the appended claims.

[0110] Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, or by a combination of computer software and electronic hardware. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0111] In several embodiments provided by the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.

[0112] In addition, those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of this application and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0113] It should be noted that the above embodiments illustrate rather than limit this application, and those skilled in the art can design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in the claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. This application can be implemented by means of hardware including several different elements and by means of a suitably programmed computer. In the unit claims listing several devices, several of these devices can be embodied by the same item of hardware. The use of the words first, second, and third, etc. does not denote any order. These words can be interpreted as names.

[0114] As described above, it is only the specific implementation manner or the description of the specific implementation manner of this application, and the protection scope of this application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application, and all such changes or substitutions should be covered by the protection scope of this application. The protection scope of this application shall be subject to the protection scope of the claims.

Claims

1. A method for determining the boundary of a river ecological corridor, characterized in that: The determination method comprises: Identify key indicator species for both terrestrial and aquatic organisms in the study area; Determine the requirements of key indicator species based on the habitat types, food chains and food webs required for different life cycles; Based on the historical data of river corridor width, density and biomass of key indicator species, the relationship curve between river corridor boundary and key indicator species diversity was obtained; Based on the pre-constructed two-dimensional habitat model of the region and typical river section, the spatial distribution and migration path information of each key indicator species in the river ecosystem are obtained; Determine the boundary thresholds of river ecological corridors; Obtain the quantitative relationship between the river surface area and the area of ​​suitable habitat for key indicator species of aquatic organisms, and determine the boundary of the water corridor of the river ecological corridor based on the maximum area of ​​suitable habitat for different life cycles; Establish the relationship between threat factors caused by human activities and terrestrial habitat quality, obtain the distribution characteristics of terrestrial habitat quality in the study area, and determine the terrestrial corridor boundary of the river ecological corridor when the change rate of the distribution characteristics of terrestrial habitat quality in the study area is lower than the preset value; Based on the water corridor boundary and land corridor boundary of the river ecological corridor and combined with the river ecological corridor boundary threshold, the river ecological corridor boundary is finally determined.

2. The determination method according to claim 1, characterized in that: The distribution characteristics of the terrestrial habitat quality in the study area were obtained. xj , specifically: Among them, Z is a normalization constant with a value of 2.5, H j Q represents the habitat suitability of land use type j; xj represents the habitat quality of grid x in land use type j; D xj Indicates the degree of habitat degradation of grid x in land use type j; K is a semi-saturation constant with a default value of 0.5; Among them, Y r represents the number of grids on the r threat factor layer; w r represents the weight of the threat factor; R represents the number of threat factors; r is the threat factor of the habitat; β x In represents the level at which the grid x is accessible; r y Indicates the influence of threat factor r on grid y, with a value between 0 and 1; i rxy represents the impact of threat factor r in the habitat of grid x on grid y; S jr It indicates the sensitivity of land use type j to threat factor r; Among them, d rmax represents the maximum impact distance of threat factor r, d xy Represents the linear distance between the grid x and y.

3. The determination method according to claim 2, characterized in that: It also includes pre-gridding unit processing of the land portion of the river ecological corridor.

4. The determination method according to claim 1, characterized in that: The key indicator species for terrestrial and aquatic organisms in the study area are as follows: Based on the integrated sky-air-ground ecological monitoring system of the study area, relevant literature research, historical data and / or expert consultation information, the species of terrestrial and aquatic organisms that often inhabit the river management area in the study area, their density and biomass are obtained, and then the key indicator species of terrestrial and aquatic organisms in the study area are determined based on the key indicator species screening indicators.

5. The determination method according to claim 1, characterized in that: It also includes the construction of a two-dimensional habitat model of a region-typical river section, including: Based on the topographic and hydrological data of the study area and combined with the requirements of the key indicator species, a regional-typical river section two-dimensional habitat model was constructed.

6. The determination method according to claim 1, characterized in that: The determination of the boundary threshold of the river ecological corridor specifically refers to: Based on the relationship curve between the river corridor boundary and the diversity of key indicator species and the spatial distribution and migration path information of each key indicator species in the river ecosystem, the boundary threshold of the river ecological corridor is determined with the goal of improving biodiversity and the restrictive condition that the migration path is not blocked.

7. The determination method according to claim 1, characterized in that: The sky-air-ground integrated ecological monitoring system of the study area specifically refers to: Satellite remote sensing technology is used to monitor the type, structure and function of the entire watershed ecosystem in the study area; drones and RTK are used to monitor at the river section scale and geomorphic unit scale.

8. The determination method according to claim 1, characterized in that: The key indicator species screening indicators include the screening principles of rarity, endangered, importance and economy.

9. A device for determining the boundary of a river ecological corridor, characterized in that: The determining device comprises: A memory for storing computer executable instructions; A processor, configured to implement the determination method according to any one of claims 1 to 8 when executing computer executable instructions stored in the memory.

10. A storage medium storing computer instructions, wherein: The computer instructions are used to cause the computer to execute the determination method according to any one of claims 1 to 8.

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