Definition method, device and equipment for ecological underground water level in desertification region

Abstract

The invention discloses a method, a device and equipment for defining an ecological underground water level in a desertification region, and relates to the field of underground water level localization, and the method comprises the following steps: carrying out underground water dynamic simulation according to meteorological data, hydrological data, geological data and social economic data; correlation analysis is carried out according to underground water level change conditions and ecological data in different media in the desertification region, and key ecological variables are obtained; determining an ecological health threshold value according to underground water level change conditions and key ecological variables in different media in the desertification region; according to the meteorological data, the hydrological data and the geological data, determining key environment variables influencing ecological system response characteristics under different underground water level conditions; and determining the ecological underground water level by using a multivariate statistical method according to the underground water level change condition, the key ecological variable, the ecological health threshold value and the key environment variable in different media in the desertification region. According to the invention, the underground water range required for maintaining the health of the ecological system in the research area can be defined.

Description

Technical Field

[0001] The present application relates to the field of groundwater level positioning, and particularly to a method, device and equipment for defining the ecological groundwater level in desertification areas. Background Art

[0002] Desertification areas are regions with sensitive and fragile ecological environments. The change of groundwater level is closely related to vegetation growth, soil moisture and ecosystem stability. However, due to the lack of effective systems and methods for defining ecological groundwater levels, the ecological systems in desertification areas are experiencing serious problems such as vegetation degradation, soil salinization and biodiversity reduction. Therefore, developing a system and method that can accurately define the ecological groundwater level in desertification areas is of great significance for regional ecological protection and water resource management. Summary of the Invention

[0003] The purpose of the present application is to provide a method, device and equipment for defining the ecological groundwater level in desertification areas, which can define the groundwater range required to maintain the health of the ecological system in the research area.

[0004] To achieve the above purpose, the present application provides the following solutions:

[0005] In the first aspect, the present application provides a method for defining the ecological groundwater level in desertification areas, including:

[0006] Obtaining meteorological data, hydrological data, geological data, ecological data and socio-economic data;

[0007] Performing groundwater dynamic simulation according to the meteorological data, the hydrological data, the geological data and the socio-economic data to obtain the changes of groundwater levels in different media in desertification areas;

[0008] Performing correlation analysis according to the changes of groundwater levels in different media in the desertification area and the ecological data to obtain the key ecological variables affecting the changes of groundwater levels;

[0009] Determining the ecological health threshold according to the changes of groundwater levels in different media in the desertification area and the key ecological variables;

[0010] Determining the key environmental variables affecting the ecological system response characteristics under different groundwater level conditions according to the meteorological data, the hydrological data and the geological data;

[0011] Determining the ecological groundwater level by using multivariate statistical methods according to the changes of groundwater levels in different media in the desertification area, the key ecological variables, the ecological health threshold and the key environmental variables.

[0012] Optionally, groundwater dynamics simulation is carried out based on the meteorological data, the hydrological data, the geological data, and the socioeconomic data to obtain the changes in groundwater levels in different media in the desertification area, specifically including:

[0013] Construct a three-dimensional geological model based on the geological data;

[0014] Determine hydrogeological parameters based on the three-dimensional geological model and the meteorological data;

[0015] Set the boundary conditions of the model according to the hydrological data, the geological data, and the socioeconomic data;

[0016] Use the groundwater dynamics simulation model to determine the changes in groundwater levels in different media in the desertification area based on the hydrogeological parameters and the boundary conditions.

[0017] Optionally, correlation analysis is carried out based on the changes in groundwater levels in different media in the desertification area and the ecological data to obtain the key ecological variables affecting the changes in groundwater levels, specifically including:

[0018] Use the Kendall rank correlation analysis method to analyze the changes in groundwater levels in different media in the desertification area and the ecological data to determine the key ecological variables.

[0019] Optionally, based on the changes in groundwater levels in different media in the desertification area and the key ecological variables, determine the ecological health threshold, specifically including:

[0020] Based on the changes in groundwater levels in different media in the desertification area and the key ecological variables, use the Mann-Kendall trend analysis and binary regression analysis to determine the response characteristics of the ecosystem under different groundwater level conditions;

[0021] Determine the ecological health threshold based on the response characteristics of the ecosystem under different groundwater level conditions.

[0022] Optionally, based on the meteorological data, the hydrological data, and the geological data, determine the key environmental variables affecting the response characteristics of the ecosystem under different groundwater level conditions, specifically including:

[0023] Based on the meteorological data, the hydrological data, and the geological data, compare and analyze the response characteristics of the ecosystem to groundwater levels under different environmental conditions to determine the key environmental variables affecting the response characteristics of the ecosystem under different groundwater level conditions;

[0024] Optionally, according to the changes in the groundwater levels in different media in the desertification area, the key ecological variables, the ecological health threshold, and the key environmental variables, a multivariate statistical method is used to determine the ecological groundwater level, which specifically includes:

[0025] Using a multivariate statistical method, with the changes in the groundwater levels in different media in the desertification area as the dependent variable and the key ecological variables and the key environmental variables as the independent variables, an ecological groundwater level definition model is established;

[0026] The ecological groundwater level is determined according to the ecological groundwater level definition model and the ecological health threshold.

[0027] Optionally, the groundwater dynamic simulation model is the numerical model MODFLOW.

[0028] Optionally, after determining the ecological groundwater level according to the ecological groundwater level definition model and the ecological health threshold, it further includes:

[0029] The real-time monitored groundwater level and the ecological groundwater level are compared and verified to obtain a verification result;

[0030] The parameters in the ecological groundwater level definition model are adjusted according to the verification result.

[0031] In a second aspect, the present application provides an ecological groundwater level definition device for a desertification area, including:

[0032] A data collection module, configured to obtain meteorological data, hydrological data, geological data, ecological data, and socioeconomic data;

[0033] A groundwater dynamic simulation module, configured to perform groundwater dynamic simulation according to the meteorological data, the hydrological data, the geological data, and the socioeconomic data to obtain the changes in the groundwater levels in different media in the desertification area;

[0034] A key ecological variable determination module, configured to perform correlation analysis according to the changes in the groundwater levels in different media in the desertification area and the ecological data to obtain the key ecological variables affecting the changes in the groundwater level;

[0035] An ecological health threshold determination module, configured to determine the ecological health threshold according to the changes in the groundwater levels in different media in the desertification area and the key ecological variables;

[0036] A key environmental variable determination module, configured to determine the key environmental variables affecting the ecological system response characteristics under different groundwater level conditions according to the meteorological data, the hydrological data, and the geological data;

[0037] An ecological groundwater level determination module, configured to determine the ecological groundwater level by using a multivariate statistical method according to the groundwater level changes in different media in the desertification area, the key ecological variables, the ecological health threshold, and the key environmental variables.

[0038] In a third aspect, the present application provides a computer device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor, where the processor executes the computer program to implement the method for defining the ecological groundwater level in the desertification area described in any one of the above.

[0039] According to the specific embodiments provided by the present application, the present application has the following technical effects:

[0040] The present application provides a method, device, and equipment for defining the ecological groundwater level in the desertification area. The groundwater dynamic simulation is carried out according to meteorological data, hydrological data, geological data, and socioeconomic data, considering the influence of different types of data on groundwater flow, so that the simulation results are more in line with the actual situation. The correlation analysis is carried out according to the groundwater level changes in different media in the desertification area and ecological data to obtain the key ecological variables affecting the groundwater level changes; according to the groundwater level changes in different media in the desertification area and the key ecological variables, the ecological health threshold is determined; according to meteorological data, hydrological data, and geological data, the key environmental variables affecting the ecological system response characteristics under different groundwater level conditions are determined; according to the groundwater level changes in different media in the desertification area, the key ecological variables, the ecological health threshold, and the key environmental variables, the ecological groundwater level is determined by using a multivariate statistical method. The ecological groundwater level is determined by using a multivariate statistical method according to the key ecological variables, the ecological health threshold, and the key environmental variables, so as to complete the groundwater range required to maintain the health of the ecological system in the research area. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0042] Figure 1 It is an application environment diagram of a method for defining the ecological groundwater level in the desertification area in an embodiment of the present application;

[0043] Figure 2 It is a flowchart of a method for defining the ecological groundwater level in the desertification area provided in an embodiment of the present application;

[0044] Figure 3Schematic structural diagram of a computer device provided by an embodiment of the present application. Detailed implementation manners

[0045] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the protection scope of the present application.

[0046] To make the above objects, features, and advantages of the present application more obvious and understandable, the present application will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0047] The method for defining the ecological groundwater level in desertified areas provided by the embodiments of the present application can be applied to, for example Figure 1In the application environment shown. Among them, the terminal 102 communicates with the server 104 through the network. The data storage system can store the data that the server 104 needs to process. The data storage system can be set separately, integrated on the server 104, placed on the cloud or other servers. The terminal 102 can send meteorological data, hydrological data, geological data, ecological data and socioeconomic data to the server 104. After receiving the meteorological data, hydrological data, geological data, ecological data and socioeconomic data, for the meteorological data, hydrological data, geological data, ecological data and socioeconomic data, the server 104 performs groundwater dynamic simulation according to the meteorological data, hydrological data, geological data and socioeconomic data to obtain the groundwater level changes in different media in the desertification area; performs correlation analysis according to the groundwater level changes in different media in the desertification area and the ecological data to obtain the key ecological variables affecting the groundwater level changes; determines the ecological health threshold according to the groundwater level changes in different media in the desertification area and the key ecological variables; determines the key environmental variables affecting the ecological system response characteristics under different groundwater level conditions according to the meteorological data, hydrological data and geological data; determines the ecological groundwater level by using multivariate statistical methods according to the groundwater level changes in different media in the desertification area, the key ecological variables, the ecological health threshold and the key environmental variables. The server 104 can feedback the obtained ecological groundwater level to the terminal 102. In addition, in some embodiments, the method for defining the ecological groundwater level in the desertification area can also be implemented separately by the server 104 or the terminal 102. For example, the terminal 102 can directly define the ecological groundwater level in the desertification area for the meteorological data, hydrological data, geological data, ecological data and socioeconomic data, or the server 104 can obtain the meteorological data, hydrological data, geological data, ecological data and socioeconomic data from the data storage system and define the ecological groundwater level in the desertification area for the meteorological data, hydrological data, geological data, ecological data and socioeconomic data.

[0048] Among them, the terminal 102 can be, but is not limited to, various desktop computers, laptop computers, smart phones, tablet computers, Internet of Things devices and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart in-vehicle devices, etc. The portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The server 104 can be implemented by an independent server or a server cluster composed of multiple servers, and can also be a cloud server.

[0049] In an exemplary embodiment, such as Figure 2As shown, a method for defining the ecological groundwater level in desertification areas is provided. This method is executed by a computer device, which can be specifically executed by a computer device such as a terminal or a server alone, or jointly executed by a terminal and a server. In the embodiments of the present application, taking the application of this method to Figure 1 server 104 in it as an example for illustration, it includes the following steps 201 to step 206. Among them:

[0050] Step 201: Obtain meteorological data, hydrological data, geological data, ecological data, and socioeconomic data.

[0051] Step 202: Conduct groundwater dynamic simulation based on the meteorological data, hydrological data, geological data, and socioeconomic data to obtain the changes in groundwater levels in different media in the desertification area.

[0052] Step 203: Conduct correlation analysis based on the changes in groundwater levels in different media in the desertification area and the ecological data to obtain the key ecological variables affecting the changes in groundwater levels.

[0053] Step 204: Determine the ecological health threshold according to the changes in groundwater levels in different media in the desertification area and the key ecological variables.

[0054] Step 205: Determine the key environmental variables affecting the response characteristics of the ecosystem under different groundwater level conditions according to the meteorological data, hydrological data, and geological data.

[0055] Step 206: Determine the ecological groundwater level using multivariate statistical methods according to the changes in groundwater levels in different media in the desertification area, the key ecological variables, the ecological health threshold, and the key environmental variables.

[0056] Implementing the above steps 201 to step 206 can define the range of groundwater required to maintain the health of the ecosystem in the study area.

[0057] In an exemplary embodiment, in step 201, data in aspects such as meteorology, hydrology, hydrogeology, vegetation ecology, and socioeconomic conditions of the study area are collected. Specifically, it includes ① Meteorological data: rainfall, evaporation, temperature, etc.; ② Hydrological data and geological data: surface water body distribution, soil type, historical records of groundwater levels, groundwater flow direction, etc.; ③ Ecological data: vegetation type, biodiversity, plant growth conditions, etc.; ④ Socioeconomic data: irrigation demand, groundwater extraction volume, etc.

[0058] In an exemplary embodiment, step 202 specifically includes: constructing a three-dimensional geological model based on the geological data; determining hydrogeological parameters according to the three-dimensional geological model and the meteorological data; setting boundary conditions of the model according to the hydrogeological data, the geological data, and the socioeconomic data; and using a groundwater dynamic simulation model to determine the changes in groundwater levels in different media in the desertification area according to the hydrogeological parameters and the boundary conditions. In practical applications, the groundwater dynamic simulation model is the numerical model MODFLOW.

[0059] Specifically, use the groundwater dynamic simulation model to simulate the change trend of the groundwater level, considering the influence of rainfall recharge and artificial pumping; combine with the geological data to simulate the flow of groundwater in different media such as sand dunes and meadows in the desertification area. The groundwater dynamic simulation is responsible for simulating the dynamic changes of the groundwater level in the desertification area. By comprehensively considering factors such as geological structure, meteorological conditions, and the interaction between surface water and groundwater, predict the change trend of the groundwater level in the future for a period of time, providing a scientific basis for defining the ecological groundwater level.

[0060] Data input for the groundwater dynamic simulation model: Geological data: including geological structure information such as soil type, rock layer distribution, faults, and fractures, which have an important impact on groundwater flow. Meteorological data: including rainfall, evaporation, temperature, etc., which are used to simulate the influence of meteorological conditions on the groundwater level. Surface water data: including the distribution of surface water bodies such as rivers and lakes, their water levels and flows, and the interaction relationship between them and groundwater. Groundwater historical data: including the observation records of groundwater levels in the past period, which are used to verify the accuracy of the simulation results.

[0061] The groundwater dynamic simulation uses the numerical model MODFLOW. MODFLOW is a widely used groundwater flow simulation software that can handle complex geological structures and boundary conditions and simulate the flow of groundwater in different media.

[0062] Construct a three-dimensional geological model based on the geological data, including stratigraphic distribution, rock layer thickness, faults, and fractures, etc. According to the geological model, meteorological, hydrogeological data, and geological data, fully consider the characteristics of different media such as sand dunes and meadows, and set hydrogeological parameters, including permeability coefficient, specific yield, etc.

[0063] Boundary conditions: Set the boundary conditions of the model, including the interaction between surface water and groundwater, the initial conditions of the groundwater level, etc. Among them, the interaction between surface water and groundwater is judged according to the observation data of river, lake, and groundwater levels in the study area to define the recharge and discharge relationship between surface water and groundwater; the initial conditions of the groundwater level take the multi-year average of groundwater levels in different periods.

[0064] Input the prepared data into the MODFLOW model, set the simulation time step and output frequency, and run the simulation program. During the simulation, MODFLOW calculates the dynamic changes of the groundwater level according to the set hydrogeological parameters and boundary conditions. After the simulation is completed, the simulation results are output, including the change trend of the groundwater level, the groundwater flow velocity, etc. Compare the simulation results with the historical groundwater data for verification, and adjust the model parameters to improve the simulation accuracy. At the same time, analyze the dynamic change characteristics of the groundwater level in the simulation results to provide a basis for defining the ecological groundwater level.

[0065] In an exemplary embodiment, step 203 specifically includes: using the Kendall rank correlation analysis method to analyze the groundwater level changes in different media in the desertification area and the ecological data to determine the key ecological variables.

[0066] Step 204 specifically includes: according to the groundwater level changes in different media in the desertification area and the key ecological variables, using the Mann-Kendall trend analysis and binary regression analysis to determine the ecological system response characteristics under different groundwater level conditions; determining the ecological health threshold according to the ecological system response characteristics under different groundwater level conditions.

[0067] Specifically, analyze the response of the ecological system to the groundwater level, define the ecological health threshold, obtain the long-term ecological index sequences such as vegetation coverage, biodiversity, plant growth status, and vegetation indices (NDVI, LAI, GPP) in the desertification area through remote sensing technology, unmanned aerial vehicle monitoring, ground surveys, etc., and combine field research and vegetation surveys to compare and analyze the responses of ecological systems such as sand dunes and meadows in the desertification area to different groundwater level conditions; at the same time, collect groundwater level data to conduct correlation analysis between the ecological index data and the groundwater level. According to the change process of the vegetation ecological index during the rise or fall of the groundwater level, define the vegetation ecological index with significant changes, the significant change trend characteristics and their critical points, and determine the key ecological variables and the ecological health threshold.

[0068] The ecological response analysis aims to determine the key ecological variables and key thresholds by analyzing the ecological system responses in the desertification area under different groundwater level conditions, that is, the points at which the ecological system function changes significantly when the groundwater level rises or falls to a certain point. These ecological health thresholds are crucial for formulating scientific groundwater level management strategies.

[0069] Correlation analysis: Use statistical software to conduct correlation analysis on the groundwater level data in the ecological data and hydrological data to determine the correlation relationship between them. Use the Kendall rank correlation analysis method to determine the ecological variables significantly correlated with the groundwater level changes and their correlation.

[0070] Trend analysis: Analyze the changing trends of groundwater levels, ecosystem changes, and the changes in their response relationships, such as the trend of vegetation coverage changing with groundwater levels. The Mann-Kendall trend test method is used for trend analysis of groundwater levels and ecosystem changes, and binary regression analysis is used to further determine their response relationship.

[0071] Threshold analysis: By comparing the ecosystem responses under different groundwater level conditions, determine the key ecological variables, and clarify the points at which significant changes occur in ecosystem functions when the groundwater level rises or falls to a certain specific range, thereby determining the ecological health threshold.

[0072] Observation points are set up in different ecosystems such as sand dunes and meadows in desertified areas to monitor groundwater level conditions in real time, observe changes in ecological indicators such as vegetation growth and soil moisture, and analyze changes in ecosystem responses to verify the accuracy of the ecological response analysis module.

[0073] Model construction: Based on the data analysis results and the data from on-site observations, construct an ecological response analysis model. This model can predict the ecosystem responses under different groundwater level conditions. The data analysis results include key ecological variables and ecological health thresholds.

[0074] Model verification: Use an independent dataset to verify the model to ensure the accuracy and reliability of the model. According to the verification results, adjust and optimize the model.

[0075] By comprehensively analyzing the ecosystem responses under different groundwater level conditions, the ecological health threshold can be determined, providing an important basis for formulating scientific groundwater level management strategies. When the groundwater level is too low and the ecosystem is damaged, an ecological water replenishment plan is formulated to restore ecosystem functions.

[0076] In an exemplary embodiment, step 205 specifically includes comparing and analyzing the response characteristics of the ecosystem to groundwater levels under different environmental conditions based on the meteorological data, the hydrological data, and the geological data, and determining the key environmental variables that affect the response characteristics of the ecosystem under different groundwater level conditions.

[0077] Step 206 specifically includes: using multivariate statistical methods, taking the changes in groundwater levels in different media in the desertified area as the dependent variable, and taking the key ecological variables and the key environmental variables as the independent variables, to establish an ecological groundwater level definition model; determining the ecological groundwater level according to the ecological groundwater level definition model and the ecological health threshold.

[0078] Specifically, by combining the results of groundwater dynamics simulation and ecological response analysis, key environmental variables that affect the change in the relationship between groundwater and vegetation ecology are selected. Using multivariate statistical methods, with the groundwater level as the dependent variable and the key ecological and environmental variables as independent variables, an ecological prediction model based on groundwater level change is established; the minimum and maximum groundwater level thresholds for maintaining ecosystem health are determined; and the ecological groundwater level is determined using the ecological health thresholds.

[0079] The ecological groundwater level definition model aims to establish a mathematical model that can accurately reflect the relationship between the groundwater level and ecosystem response in desertification areas by comprehensively considering various factors such as geology, hydrology, and ecology. This model can predict the response of the ecosystem under different groundwater level conditions and provide an important basis for formulating scientific groundwater level management strategies.

[0080] The data used in the ecological groundwater level definition model are as follows: Geological data: Information on geological structures, soil types, rock layer distributions, etc. in desertification areas is collected to provide a geological background for the model; Hydrological data: Hydrological information such as groundwater level, rainfall, evaporation, and the connection relationship between surface water and groundwater is collected to simulate the dynamic changes of groundwater; Ecological data: Ecological index data such as vegetation coverage, biodiversity, plant growth status, NDVI, LAI, and GPP are collected to analyze the response of the ecosystem to the groundwater level. First, the data needs to be preprocessed: The collected data is subjected to preprocessing work such as cleaning, sorting, and normalization to ensure the accuracy and consistency of the data.

[0081] For the previously constructed groundwater dynamics simulation model and ecosystem response model, the groundwater dynamics simulation model is used to simulate the dynamic changes of the groundwater level, and the ecosystem response model is used to analyze the response of the ecosystem to the groundwater level. A connection is established between the two models through the groundwater level. Using geological data, the geological zoning of the study area is determined. In different zones, considering other environmental variables such as meteorology, ecology, hydrology, and hydrogeology, key environmental variables that affect the change in the relationship between groundwater and vegetation ecology are selected, and multivariate statistical methods are applied to establish an ecological groundwater level definition model.

[0082] The model is calibrated using the historical data of the parameters in the model by the trial-and-error method, and the parameter values are adjusted to improve the accuracy and reliability of the model.

[0083] Simulation run: The calibrated model is run for simulation, and different groundwater level conditions are input to simulate the response of the ecosystem.

[0084] Result analysis: The simulation results are analyzed to determine the response characteristics of the ecosystem and the ecological health thresholds under different groundwater level conditions, that is, the points at which the ecosystem function changes significantly when the groundwater level rises or falls to a certain specific range.

[0085] In practical applications, after determining the ecological groundwater level according to the ecological groundwater level definition model and the ecological health threshold, the following steps are further included: comparing and verifying the real-time monitored groundwater level with the ecological groundwater level to obtain a verification result; adjusting the parameters in the ecological groundwater level definition model according to the verification result. Specifically, groundwater level monitoring wells are arranged in the study area, and the groundwater level sensor and data transmission system are used to monitor the change of the regional groundwater level in real time; the real-time monitored data is compared and verified with the model prediction result, and methods such as cross-validation and A / B testing are used to adjust the model parameters according to the verification result; according to the adjusted model, the groundwater level definition range is updated regularly.

[0086] Model verification: Use an independent dataset to verify the model to ensure the accuracy and reliability of the model. During the verification process, the differences between the simulation results and the actual situation can be compared to evaluate the prediction ability of the model.

[0087] Model optimization: Optimize the model according to the verification result, and adjust the parameters and model structure to improve the accuracy and applicability of the model. Methods such as sensitivity analysis and uncertainty analysis can be used during the optimization process.

[0088] This application relates to the technical fields of ecohydrology and geographic information systems. Aiming at the characteristics of extreme climate, sparse vegetation, and scarce water resources in desertification areas, it comprehensively considers meteorological, hydrological, hydrogeological, ecological, and socioeconomic factors. Through data collection, model construction, real-time monitoring, and verification and adjustment, it accurately defines the range of groundwater levels required to maintain the health of the ecosystem in desertification areas, providing a scientific basis for water resource management and ecological protection.

[0089] This application also provides an application scenario that applies the above-mentioned method for defining the ecological groundwater level in desertification areas. Specifically: The method for defining the ecological groundwater level in desertification areas provided in this embodiment can be applied to the ecological restoration scenario in desertification grassland areas. The scenario includes an environmental problem and current situation analysis link, an ecological groundwater level determination link, and a restoration measure guidance link; first, analyze the environmental problems and current situations such as the decline of the grassland groundwater level, vegetation degradation, and land desertification under the influence of climate change and human activities, then determine a reasonable ecological groundwater level according to the measured data, and finally, based on the determined ecological groundwater level, guide ecological restoration measures such as groundwater extraction and ecological water replenishment. The method for defining the ecological groundwater level in desertification areas provided in this embodiment belongs to the ecological groundwater level determination link in the ecological restoration scenario of desertification grassland areas. Specifically, during the ecological restoration process of desertification grassland areas, the method for defining the ecological groundwater level in desertification areas can be used to determine a reasonable ecological groundwater level for the purpose of ecological restoration.

[0090] Based on the same inventive concept, an embodiment of the present application further provides a device for defining the ecological groundwater level in desertified areas for implementing the method for defining the ecological groundwater level in desertified areas involved above. The solution provided by this device for solving problems is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the device for defining the ecological groundwater level in desertified areas provided below can refer to the limitations on the method for defining the ecological groundwater level in desertified areas in the above text, and will not be repeated here.

[0091] In an exemplary embodiment, a device for defining the ecological groundwater level in desertified areas is provided, including:

[0092] A data collection module, configured to obtain meteorological data, hydrological data, geological data, ecological data, and socioeconomic data.

[0093] A groundwater dynamic simulation module, configured to perform groundwater flow simulation according to the meteorological data, the hydrological data, the geological data, and the socioeconomic data, and obtain the flow conditions of groundwater in different media in desertified areas.

[0094] An ecological response analysis module, configured to perform correlation analysis according to the hydrological data, the geological data, and the ecological data, and obtain key ecological variables and ecological health thresholds.

[0095] An ecological groundwater level definition module, configured to determine the ecological groundwater level by using multivariate statistical methods according to the flow conditions of groundwater in different media in desertified areas, the key ecological variables, and the ecological health thresholds.

[0096] In an exemplary embodiment, a computer device is provided. This computer device can be a server or a terminal, and its internal structure diagram can be as Figure 3 shown. This computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of this computer device is used to provide computing and control capabilities. The memory of this computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of this computer device is used to store ecological groundwater level data. The input / output interface of this computer device is used to exchange information between the processor and external devices. The communication interface of this computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it implements a method for defining the ecological groundwater level in desertified areas.

[0097] Those skilled in the art can understand that Figure 3 the structure shown in Figure 3 is only a block diagram of some structures related to the solution of this application, and does not constitute a limitation on the computer device to which the solution of this application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine some components, or have different component arrangements. In an exemplary embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory, and when the processor executes the computer program, the above method embodiments are implemented.

[0098] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant regulations.

[0099] Those of ordinary skill in the art can understand that all or part of the processes of implementing the above method embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above method embodiments. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0100] In each of the embodiments provided in the present application, the database involved may include at least one of a relational database and a non-relational database. The non-relational database may include a distributed database based on blockchain, etc., without limitation. In each of the embodiments provided in the present application, the processor may be a general-purpose processor, a central processing unit, a graphics processing unit, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., without limitation.

[0101] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0102] In this article, specific examples are used to elaborate on the principles and implementation manners of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present application.

Claims

1. A method for defining ecological groundwater level in desertified areas, characterized in that: The method for defining the ecological groundwater level in desertified areas includes: Obtain meteorological data, hydrological data, geological data, ecological data, and socio-economic data; Conducting groundwater dynamic simulation based on the meteorological data, the hydrological data, the geological data and the socio-economic data to obtain groundwater level changes in different media in desertified areas; Conduct correlation analysis based on the groundwater level changes in different media in the desertified area and the ecological data to obtain key ecological variables that affect groundwater level changes; Determine ecological health thresholds based on groundwater level changes in different media in desertified areas and the key ecological variables mentioned above; Determine key environmental variables that affect ecosystem response characteristics under different groundwater level conditions based on the meteorological data, the hydrological data and the geological data; The ecological groundwater level is determined using multivariate statistical methods based on the changes in groundwater levels in different media in the desertified area, the key ecological variables, the ecological health thresholds and the key environmental variables.

2. The method for defining ecological groundwater level in desertified areas according to claim 1, characterized in that: The groundwater dynamics simulation is performed based on the meteorological data, the hydrological data, the geological data and the socio-economic data to obtain the change of groundwater levels in different media in the desertified area, specifically including: constructing a three-dimensional geological model based on the geological data; Determining hydrogeological parameters according to the three-dimensional geological model and the meteorological data; Setting boundary conditions of a model based on the hydrological data, the geological data, and the socio-economic data; The groundwater dynamic simulation model is used to determine the groundwater level changes in different media in the desertification area according to the hydrogeological parameters and the boundary conditions.

3. The method for defining ecological groundwater level in desertified areas according to claim 1, characterized in that: According to the change of groundwater level in different media in the desertified area and the ecological data, the key ecological variables affecting the change of groundwater level are obtained, including: The Kendall rank correlation analysis method is used to analyze the changes in groundwater levels in different media in the desertified area and the ecological data to determine key ecological variables.

4. The method for defining ecological groundwater level in desertified areas according to claim 1, characterized in that: According to the changes in groundwater levels in different media in desertified areas and the key ecological variables, the ecological health thresholds are determined, including: Based on the changes in groundwater levels in different media in desertified areas and the key ecological variables, Mann-Kendall trend analysis and binary regression analysis were used to determine the ecosystem response characteristics under different groundwater level conditions; The ecological health threshold is determined based on the ecosystem response characteristics under the different groundwater level conditions.

5. The method for defining ecological groundwater level in desertified areas according to claim 1, characterized in that: According to the meteorological data, the hydrological data and the geological data, key environmental variables affecting the response characteristics of the ecosystem under different groundwater level conditions are determined, including: Based on the meteorological data, the hydrological data and the geological data, the response characteristics of the ecosystem to the groundwater level under different environmental conditions are compared and analyzed, and the key environmental variables that affect the response characteristics of the ecosystem under different groundwater level conditions are determined.

6. The method for defining ecological groundwater level in desertified areas according to claim 1, characterized in that: According to the change of groundwater level in different media in the desertified area, the key ecological variables, the ecological health threshold and the key environmental variables, the ecological groundwater level is determined by using multivariate statistical methods, specifically including: Using multivariate statistical methods, taking the groundwater level changes in different media in the desertified area as dependent variables, and taking the key ecological variables and the key environmental variables as independent variables, an ecological groundwater level definition model is established; The ecological groundwater level is determined according to the ecological groundwater level definition model and the ecological health threshold.

7. The method for defining ecological groundwater level in desertified areas according to claim 2, characterized in that: The groundwater dynamic simulation model is a numerical model MODFLOW.

8. The method for defining ecological groundwater level in desertified areas according to claim 6, characterized in that: After determining the ecological groundwater level according to the ecological groundwater level definition model and the ecological health threshold, the method further includes: The verification results are obtained by comparing the real-time monitored groundwater level with the ecological groundwater level; The parameters in the ecological groundwater level definition model are adjusted according to the verification results.

9. A device for defining ecological groundwater level in desertified areas, characterized in that: The device for defining the ecological groundwater level in desertified areas comprises: Data collection module, used to obtain meteorological data, hydrological data, geological data, ecological data and socio-economic data; A groundwater dynamic simulation module, used to perform groundwater dynamic simulation based on the meteorological data, the hydrological data, the geological data and the socio-economic data, to obtain groundwater level changes in different media in desertified areas; A key ecological variable determination module is used to perform correlation analysis based on the groundwater level changes in different media in the desertification area and the ecological data to obtain key ecological variables that affect groundwater level changes; An ecological health threshold determination module, used to determine the ecological health threshold according to the groundwater level changes in different media in the desertification area and the key ecological variables; A key environmental variable determination module, used to determine key environmental variables that affect the response characteristics of the ecosystem under different groundwater level conditions based on the meteorological data, the hydrological data and the geological data; The ecological groundwater level determination module is used to determine the ecological groundwater level using a multivariate statistical method based on the groundwater level changes in different media in the desertified area, the key ecological variables, the ecological health threshold and the key environmental variables.

10. A computer device comprising: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method for defining the ecological groundwater level in a desertified area according to any one of claims 1 to 8.

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