CN112465332A - Method for evaluating stability of ecological geological environment of urban artificial wetland park - Google Patents

Abstract

The invention relates to the field of ecological protection of wetland parks, and relates to a method for evaluating the stability of ecological geological environment of artificial wetland parks. A method for evaluating the stability of the ecological geological environment of an urban artificial wetland park, comprising the following steps: collecting, investigating and analyzing the basic characteristic parameters of the ecological, geological, water and soil environment quality of the urban artificial wetland park, and obtaining the original data of the ecological geological environment of the wetland park; The basic characteristic parameters are processed to generate a factor layer, and a comprehensive evaluation index system is established; the comprehensive weight of each evaluation index is calculated; an evaluation model is constructed based on the GIS platform; the evaluation model is used to evaluate the ecological and geological environment stability of the study area. . The method of the present invention is oriented to the evaluation, planning and design personnel of wetland parks, and is different from the traditional evaluation methods in the past. With the support of RS, GIS, GPS and artificial intelligence algorithms, the different characteristics of the ecological environment are analyzed based on the spatiotemporal big data, and the evaluation of wetland parks is improved. Eco-geological environment stability is assessed to provide scientific guidance for wetland park planning.

Description

A method for evaluating the stability of ecological and geological environment of urban constructed wetland parks

technical field

The invention relates to the field of ecological protection of wetland parks, in particular to a method for evaluating the stability of the ecological geological environment of urban artificial wetland parks.

Background technique

Wetland system is a complex ecosystem formed by the interaction of water and land, and has important ecological functions, such as water purification, carbon sequestration, flood discharge, adjustment of local microclimate, prevention of soil loss and storage of water resources. However, with the continuous development and utilization of natural resources (land, mineral and space resources) and economic construction, the wetland system has been destroyed on a large scale. According to statistics, since 1990, about 50% of the natural wetlands in the world have been degraded. As a result, ecological and environmental problems such as soil erosion and pollution have gradually become important factors restricting the healthy development of cities and seriously threaten the living environment of human beings. Therefore, solving the ecological and geological environmental problems of wetlands will greatly promote human security, urban development and planning.

In order to reasonably solve the problems related to wetlands, expand the proportion of wetland resources and coordinate economic development, the Chinese government has made many efforts in wetland protection. On a global scale, many scholars have also conducted research on wetlands, and related research has developed from a single qualitative description of wetland characteristics to the current quantitative assessments such as wetland value assessment, wetland ecosystem health assessment, wetland environmental impact assessment, and wetland ecological risk assessment. However, due to the validity, diversity and uncertainty of wetland data acquisition, it is very difficult to analyze, evaluate and plan the quality of wetland ecological environment, and there are few related studies. Moreover, most of the research objects are still concentrated on natural wetlands, and there are few studies on wetland parks, a special type of wetland. In addition, there are few studies on the stability of wetland systems from the comprehensive ecological, geological and environmental perspectives.

With the rise of 3S technology (RS, GIS, GPS), numerical simulation, and artificial intelligence algorithms, related difficulties have been solved, and these methods have been widely used in wetland evaluation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to address the problems existing in the prior art, to provide a method for evaluating the stability of the ecological geological environment of urban artificial wetland parks, and to provide a reference basis for the sustainable development of wetland resources in urban areas and the evaluation and protection of the ecological geological environment, Provide a reference standard and reliable geological scientific basis for similar wetland planning and site selection.

In order to achieve the above purpose, the technical scheme adopted in the present invention is: a method for evaluating the stability of the ecological geological environment of an urban artificial wetland park, which comprises the following steps:

1) Collect and investigate and analyze the basic characteristic parameters of the ecological, geological, water and soil environment quality of the urban artificial wetland park, and obtain the original data of the ecological and geological environment of the wetland park;

2) Process the described basic characteristic parameters to generate a factor layer, and establish a comprehensive evaluation index system;

3) Calculate the comprehensive weight of each evaluation index;

4) Build an evaluation model based on the GIS platform;

5) Use the evaluation model to evaluate the stability of the ecological geological environment in the study area.

As a preferred mode of the present invention, the basic characteristic parameters in step 1) include geological structure, terrain factors, geochemistry, meteorological conditions, land use types, and vegetation coverage.

As a preferred mode of the present invention, the method for establishing the eco-geological environment evaluation index system in step 2) includes: a) selecting an influence factor affecting the stability of the eco-geological environment from the basic characteristic parameters; b) combining the expert experience method , Natural discontinuous point method and normalization method to grade the influencing factors and assign values in the range of 0 to 1; c) Data analysis is carried out through the SPSS platform, and the main influencing factors affecting the stability of the ecological and geological environment are finally determined, and they are used as evaluation indicators.

Further preferably, the evaluation indicators include: normalized vegetation index, water wetland, ecological land use type, surface elevation, terrain slope, groundwater depth, soil quality, surface water quality and groundwater quality.

As a preferred mode of the present invention, the calculation method of the comprehensive weight of each evaluation index in step 3) includes:

A. First, the Delphi expert survey method was used to solicit opinions from a total of 9 experts and scholars in related fields;

B. Secondly, each expert evaluates the relative importance of each evaluation index to the ecological environment according to the 1-9 ratio method, and determines the relative importance of the kth expert to the two evaluation indicators i and j under this evaluation method The judgment is B _{ij k} , set the judgment matrix B(k)=[B _{ij k} ];

C. Then use triangular fuzzy numbers to establish a fuzzy group judgment matrix, which is expressed as follows:

B _ij =[α _ij , β _ij , γ _ij ];

D. Determine the fuzzy weight vector of the evaluation index F _i :

和

分别是三个模糊权重向量三个分量的最小值，中间值和最大值；in,

and

are the minimum, middle and maximum values of the three components of the three fuzzy weight vectors;

E. Calculate the relative weight of each evaluation index by the geometric mean method, and then normalize it to obtain the comprehensive weight. The normalization formula is as follows:

As a preferred mode of the present invention, the method for constructing an evaluation model based on the GIS platform in step 4) includes:

According to the determined evaluation index and comprehensive weight, each evaluation index is rasterized in the GIS platform, and the general formula is as follows:

Among them, W _k is the weight of the evaluation index to the comprehensive evaluation target, F _kj is the evaluation value of the k-th evaluation index of grid i, and S _i is the comprehensive evaluation value of grid i;

According to the frequency and frequency distribution _histogram of Si, the grading threshold of ecological geological environment stability is obtained. ,very high".

As a preferred mode of the present invention, the step of evaluating the stability of wetland ecological geological environment in step 5) is as follows:

Use ArcGIS to process raw data and normalize impact factors;

Based on the Python platform, classify the ecological geological environment of the study area;

Combined with the classification of eco-geological environment in the study area, the stability of wetland eco-geological environment is evaluated in different regions in the constructed evaluation model.

Further preferably, the ecological geological environment of the research area is classified by the following method: using the improved k-means clustering algorithm to divide the ecological geological environment of the research area into five categories, namely arable farmland, shrub land, swamp water, Grit chambers and reservoirs.

Compared with the prior art, the present invention at least has the following beneficial effects:

The method for evaluating the ecological and geological environment stability of an urban constructed wetland park provided by the present invention comprehensively considers the complex ecological-geological-environmental quality system characteristics of the urban constructed wetland park from the aspects of ecology, geology and water and soil environment quality, and evaluates The stability of ecological environment quality of urban constructed wetlands. The invention makes full use of the big data storage function of RS and GPS, the data processing spatial analysis function of the GIS platform, and the artificial intelligence data analysis technology (machine learning and deep learning) of the Python system. Fuzzy Delphi AHP realizes the processing (assignment, weighting, classification, etc.) of the influencing factors of the ecological and geological environment stability of various urban constructed wetlands, and the superposition analysis of the influencing factors, so as to extract the numerical value of the ecological and geological environment stability. . The practical application shows that this method is different from the traditional ecological stability evaluation methods in the past. It is carried out in the GIS and Python environment and achieves the expected effect, which provides a new idea for the evaluation and planning of the ecological geological environment.

Description of drawings

Fig. 1 is a technical roadmap of the present invention based on evaluating the ecological geological environment stability of urban constructed wetland parks.

Fig. 2 is the hierarchical structure model of the evaluation of the ecological geological environment stability of the urban constructed wetland park of the present invention;

Fig. 3 is the ecological factor layer of Jixi National Wetland Park in the embodiment of the present invention;

Fig. 4 is the geological factor layer of Jixi National Wetland Park in the embodiment of the present invention;

Fig. 5 is the soil and water environment quality factor layer of Jixi National Wetland Park in an example of the present invention;

Fig. 6 is the eco-geological environment classification diagram of Jixi National Wetland Park based on machine learning in an embodiment of the present invention;

FIG. 7 is a grading diagram of the ecological geological environment stability of Jixi National Wetland Park in an embodiment of the present invention.

Detailed ways

In order to facilitate understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described in this specification. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure will be provided.

Embodiment 1 This implementation provides an evaluation method for the ecological and geological environment stability of urban constructed wetland parks based on GIS and Python environment, as shown in Figure 1, the method includes the following steps:

(1) Collect, investigate and analyze the basic characteristic parameters of the ecological, geological, water and soil environment quality of the urban artificial wetland park, obtain the current situation of the ecological and geological environment of the wetland park, and formulate the planning and restoration goals of the wetland park according to the current situation. .

Among them, the basic characteristic parameters of ecology, geology, water and soil environment quality of the municipal constructed wetland park include geological structure, topographic factors, geochemistry (soil, surface water, groundwater), meteorological conditions, land use type, vegetation coverage and other data.

Soil data included collection of soil samples at the surface, 1 m above the surface, and 2 m above the surface. The surface water data includes sampling points evenly arranged at the entrance and exit of main rivers in lakes and wetlands, at the entrance of industrial, agricultural and domestic wastewater discharge, within 300 to 500 m in rivers, and at 50 to 100 m in wetland lakes. water quality during dry season. Groundwater data includes sampling and analysis of water quality in wet, flat and dry periods.

(2) Based on the generation factor layer of remote sensing image, digital elevation and environmental quality interpolation processing, a comprehensive evaluation index system is established, as shown in Figure 2. The specific steps are as follows:

a. The selection of ecological and geological environment evaluation indicators refers to the selection of influencing factors that affect the stability of the ecological and geological environment, mainly including three aspects: ecological environment (M1), geological environment (M2) and soil and water environment quality (M3).

b. Combine expert experience method, natural discontinuity method, normalization and other methods to classify each evaluation index (influence factor) and assign a value in the range of 0 to 1. Through data analysis on the SPSS platform, the main influencing factors of the stability assessment of the study area were finally determined.

Using the above method, this embodiment determines 9 main influencing factors as evaluation indicators: normalized vegetation index (NDVI, F1), water wetland (F2), ecological land use type (F3), surface elevation (F4), terrain slope (F5), groundwater depth (F6), soil quality (F7), surface water quality (F8), groundwater quality (F9).

(3) Calculate the comprehensive weight of each evaluation index by using the Fuzzy Delphi AHP. The specific steps are as follows:

Since each evaluation index (influence factor) contributes differently to the ecological and geological environment stability of urban constructed wetland parks, different influence factors have different weights Wi, and the calculation method of the weights is as follows:

A. First, the Delphi expert survey method was used to solicit opinions from a total of 9 experts and scholars in related fields, including 3 hydrogeology experts, 3 ecology experts, and 3 garden planning experts.

B. Secondly, each expert evaluates the relative importance of each evaluation index to the ecological environment according to the 1-9 ratio method, and determines the k-th expert's evaluation of the i-th expert under this evaluation method (such as Saaty's 1-9 ratio method). The judgment of the relative importance between the two evaluation indexes of and j is B _ij·k , and the judgment matrix B(k)=[B _ij·k ] is set.

C. Then use triangular fuzzy numbers to establish a fuzzy group judgment matrix, which is expressed as follows:

B _ij =[α _ij , β _ij , γ _ij ];

On the basis of the subjective opinions of decision-making experts and the suggestions of other experts, a relatively objective fuzzy group judgment matrix is established.

其中，

和

分别是三个模糊权重向量三个分量的最小值，中间值和最大值。D. Next, determine the fuzzy weight vector of the evaluation index F _i :

in,

and

are the minimum, middle and maximum values of the three components of the three fuzzy weight vectors, respectively.

E. Finally, calculate the relative weight of each evaluation index by the geometric mean method, and then normalize it to obtain the comprehensive weight of each evaluation index. The normalization formula is as follows:

(4) Construction of evaluation model based on GIS platform

According to the ecological geological environment stability evaluation index determined in step (2)a, and the comprehensive weight of each evaluation index determined in step (3)E, each evaluation index is rasterized in the GIS platform, and the general formula is as follows :

Among them, W _k is the weight of the evaluation index to the comprehensive evaluation target, F _kj is the evaluation value of the k-th evaluation index of grid i, and S _i is the comprehensive evaluation value of grid i.

According to the frequency and frequency distribution _histogram of the comprehensive evaluation value Si, the classification threshold of the ecological and geological environment stability is obtained, which is divided into five grades, namely "very low, low, medium, high, and very high". The grading criteria are shown in Table 1. Accordingly, the stability evaluation model is obtained.

Table 1 Comprehensive ecological geological environment stability classification

The evaluation criteria for the ecological and geological environment stability of urban constructed wetlands in the constructed evaluation model are shown in Table 2.

Table 2 Evaluation criteria for the ecological and geological environment stability of urban constructed wetlands

(5) To carry out zonal assessment on the stability of wetland ecological geological environment, the specific steps are as follows:

Use ArcGIS to process the original data (that is, the basic characteristic parameters of the ecology, geology, water and soil environment quality of the urban constructed wetland park obtained in step (1)), and normalize the influencing factors that affect the stability of the ecological and geological environment;

Based on the Python platform, using machine learning technology, such as the improved k-means clustering algorithm, the ecological geological environment of the study area is divided into five categories, as shown in Table 3.

Table 3 Types of eco-geological environment

Combined with the classification of the eco-geological environment of the study area obtained in the above steps, different eco-geological environment categories were evaluated in different regions in the constructed evaluation model GIS platform, and the evaluation results of the ecological and geological environment stability of the wetland park were obtained.

(6) Finally, the obtained evaluation results are verified by comparing the quantitative evaluation results with field confirmation and remote sensing qualitative analysis.

Embodiment 2 This embodiment adopts the evaluation method provided by the present invention to evaluate the ecological and geological environment stability of the wetland park in the study area. The specific process is as follows:

(1) Overview of the study area (wetland park): The study area is located in the west of the central city of Jinan, with geographic coordinates ranging from 116°45'E to 116°50'E and 36°37'N to 36°41'N. It is a sedimentation pool and a dam, the west is the Yellow River, the south is the road between Fengzhuang Village and Laoli Village, and the east is the diversion canal of the east route of the South-to-North Water Diversion Project, with an area of about 33.6km ² . The altitude of Jixi Wetland is between -1.92m and 68.58m, the slope is between 0° and 34°, and about 89% of the area is low. The terrain of Jixi Wetland is high in the south and low in the north, and the whole is relatively flat.

(2) How to obtain evaluation index data

The index data was obtained by using relevant data such as Landsat images, DEM images, basic geological, hydrometeorological data in the study area. The Landsat 8 OLI data comes from the Geospatial Data Cloud Platform of the Computer Network Information Center of the Chinese Academy of Sciences, and the land use data is extracted by a support vector machine (SVM) using Landsat images. The DEM image is corrected by the combination of unmanned aerial vehicle field survey and image, and the remote sensing data is processed by radiometric calibration, atmospheric correction, mosaic, band combination and enhancement by using ENVI5.4 professional remote sensing image processing software to compile remote sensing image maps. Meanwhile, in order to determine the water and soil environmental quality in the wetland, surface water samples from 9 locations, groundwater samples from 14 locations, and soil samples from 16 locations were collected. Three groups of samples were collected from each site for comparative analysis.

(3) Data preprocessing

Refers to all influencing factors, using GIS method, according to the contribution of each influencing factor to stability, and based on relevant national standard and normative documents and historical data statistics of Jixi National Wetland Park, the impact factors are classified and normalized. .

(4) Selection of evaluation indicators

According to the requirements of the Ramsar Convention, the selection of evaluation indicators should have the following two elements: (1) Be able to specifically describe the status of the wetland environment (ecosystem, social system status, recent and current pressures, existing conditions ), the lack of data areas can be compensated by scientific methods to collect opinions from experts and local residents; (2) to be able to describe the pressures that may exist now and in the future.

Accordingly, the influencing factors that play a leading role in the ecological environment are selected, and the secondary factors are eliminated. At the same time, considering the accuracy and effectiveness of information acquisition, the stability of wetlands includes three categories: ecological environment M1, geological environment M2 and soil and water environment quality M3.

Three factors were selected for each category and a total of 9 factors were selected: ecological environment M1: normalized vegetation index (NDVI) F1, water wetland F2, ecological land use type F3; geological environment M2: surface elevation F4, terrain slope F5, Groundwater buried depth F6; water and soil environment quality M3: soil quality F7, surface water quality F8, groundwater quality F9, as shown in Figure 2.

Using the above method, the selected ecological factor layer of Jixi National Wetland Park is shown in Figure 3, the geological factor layer is shown in Figure 4, and the water and soil environment quality factor layer is shown in Figure 5.

Combined with expert experience method, natural discontinuous point method, normalization and other methods, each evaluation index (selected impact factor) is graded and assigned a value in the range of 0 to 1. Through data analysis on the SPSS platform, the main influencing factors affecting the stability of the eco-geological environment are finally determined, which are used as evaluation indicators to formulate a comprehensive evaluation index system for the ecological and geological environment stability of the wetland park.

(5) Empowerment

Since each evaluation index contributes differently to the ecological and geological environment stability of urban constructed wetland parks, the evaluation indexes are weighted based on fusion theories such as fuzzy mathematics method, Delphi expert investigation method, and AHP. The specific methods are as follows:

A. The Delphi expert survey method was used to solicit opinions from a total of 9 experts and scholars in related fields, including 3 hydrogeology experts, 3 ecology experts, and 3 garden planning experts. Each expert evaluates the relative importance of each evaluation index to the ecological environment according to the 1–9 scale method;

B. Secondly, determine that the kth expert's judgment of the relative importance between the i and jth two evaluation indicators under the evaluation method criterion is B _{ij k} , and set the judgment matrix B(k)=[B _{ij ·k} ];

C. Then use triangular fuzzy numbers to establish a relatively objective fuzzy group judgment matrix based on the subjective opinions of decision makers, thus synthesizing the suggestions of experts. The fuzzy group judgment matrix is expressed as follows: B _ij =[α _ij , β _ij , γ _ij ].

其中，

和

分别是三个模糊权重向量三个分量的最小值，中间值和最大值。D. Next, determine the fuzzy weight vector of the evaluation index F _i :

in,

and

are the minimum, middle and maximum values of the three components of the three fuzzy weight vectors, respectively.

E. Finally, calculate the relative weight of each evaluation index by the geometric mean method, and then normalize it to obtain the comprehensive weight of each evaluation index. The normalized synthesis weight is obtained by the following formula:

The comprehensive weights of the nine evaluation indicators obtained are shown in Table 4.

Table 4 Decision weights of each evaluation index

(6) According to the ecological geological environment stability evaluation index determined in the above steps, and the determined comprehensive weight of each evaluation index, each evaluation index is rasterized in the GIS platform, and the general formula is as follows:

Among them, W _k is the weight of the evaluation index to the comprehensive evaluation target, F _kj is the evaluation value of the k-th evaluation index of grid i, and S _i is the comprehensive evaluation value of grid i.

According to the frequency and frequency distribution _histogram of Si, the classification threshold of ecological geological environment stability is obtained, and the ecological geological environment of Jixi National Wetland Park is divided into five grades. Accordingly, the stability evaluation model is obtained. The evaluation criteria of the evaluation model are shown in Table 2.

(7) Zoning evaluation of the stability of the wetland eco-geological environment in Jixi National Wetland Park

Using ArcGIS to process the raw data, after normalizing the main control factors, programming in Python to perform cluster analysis of high-dimensional data. After Python calculations, the processed data is output in a format that ArcGIS can read. Statistical analysis was performed on the clustering results using ArcGIS. Finally, according to the results of the clustering, field investigations were carried out, and the types of ecological geological environments were divided, as shown in Table 3 and Figure 6.

(8) In the constructed GIS platform, using the evaluation model combined with the ecological geological environment types of Jixi National Wetland Park obtained in the above steps, the stability of the ecological geological environment of Jixi National Wetland Park is evaluated by zone. The evaluation results are shown in FIG. 7 .

(9) The Jixi National Wetland Park is planned by comparing the quantitative evaluation results with field confirmation and remote sensing qualitative analysis for verification.

The applicability of the stability evaluation method provided by the present invention is verified by investigating the actual conditions of the study area such as ecological environment and geological conditions, land use types, types and distribution of groundwater and surface water resources, and vegetation coverage.

Claims (8)

1. an evaluation method for the stability of the ecological geological environment of an urban artificial wetland park, is characterized in that, comprises the following steps: 1) Collect and investigate and analyze the basic characteristic parameters of the ecological, geological, water and soil environment quality of the urban artificial wetland park, and obtain the original data of the ecological and geological environment of the wetland park; 2) Process the described basic characteristic parameters to generate a factor layer, and establish a comprehensive evaluation index system; 3) Calculate the comprehensive weight of each evaluation index; 4) Build an evaluation model based on the GIS platform; 5) Use the evaluation model to evaluate the stability of the ecological geological environment in the study area. 2. the evaluation method of the ecological geological environment stability of urban constructed wetland park according to claim 1, is characterized in that, the basic characteristic parameter described in step 1) comprises geological structure, terrain factor, geochemistry, meteorological condition, land use type and vegetation coverage. 3. the evaluation method of the ecological geological environment stability of urban constructed wetland park according to claim 1, is characterized in that, the establishment method of ecological geological environment evaluation index system in step 2) comprises: a) selecting the influencing factors affecting the stability of the ecological geological environment from the basic characteristic parameters; b) Combine the expert experience method, the natural discontinuity method and the normalization method to classify the impact factor and assign a value in the range of 0 to 1; c) Perform data analysis through the SPSS platform, and finally determine the main influencing factors affecting the stability of the ecological and geological environment, and use them as evaluation indicators. 4. The method for evaluating the ecological and geological environment stability of an urban constructed wetland park according to claim 3, wherein the evaluation index comprises: normalized vegetation index, water wetland, ecological land use type, surface elevation, Topographic slope, groundwater depth, soil quality, surface water quality and groundwater quality. 5. The evaluation method of the ecological geological environment stability of urban constructed wetland park according to claim 4, is characterized in that, the calculation method of the comprehensive weight of each evaluation index in step 3) comprises: A. The Delphi expert survey method is used to solicit opinions from a total of 9 experts and scholars in related fields, and each expert evaluates the relative importance of each evaluation index to the ecological environment according to the 1-9 ratio method; B. Secondly, each expert evaluates the relative importance of each evaluation index to the ecological environment according to the 1-9 ratio method, and determines the relative importance of the kth expert to the two evaluation indicators i and j under this evaluation method The judgment is B _{ij k} , set the judgment matrix B(k)=[B _{ij k} ]; C. Then use triangular fuzzy numbers to establish the fuzzy group judgment matrix as follows: B _ij =[α _ij , β _ij , γ _ij ]; D. Determine the fuzzy weight vector of the evaluation index F _i :

in,

and

are the minimum, middle and maximum values of the three components of the three fuzzy weight vectors; E. Calculate the relative weight of each evaluation index by the geometric mean method, and then normalize it to obtain the comprehensive weight of each evaluation index. The normalization formula is as follows:

6. the evaluation method of the ecological geological environment stability of urban constructed wetland park according to claim 5, is characterized in that, the method for constructing evaluation model based on GIS platform in step 4) comprises: According to the determined evaluation indexes and their comprehensive weights, each evaluation index is rasterized in the GIS platform. The general formula is as follows:

Among them, W _k is the weight of the evaluation index to the comprehensive evaluation target, F _kj is the evaluation value of the k-th evaluation index of grid i, and S _i is the comprehensive evaluation value of grid i; According to the frequency and frequency distribution _histogram of Si, the grading threshold of ecological geological environment stability is obtained. ,very high". 7. the evaluation method of the ecological geological environment stability of urban artificial wetland park according to claim 6, is characterized in that, the step of evaluating wetland ecological geological environment stability in step 5) is as follows: Use ArcGIS to process raw data and normalize impact factors; Based on the Python platform, classify the ecological geological environment of the study area; Combined with the classification results of the eco-geological environment in the study area, the stability of the wetland eco-geological environment is evaluated by zoning in the constructed evaluation model. 8. the evaluation method of the ecological geological environment stability of urban constructed wetland park according to claim 7, is characterized in that, the ecological geological environment of described study area adopts following method to classify: adopt improved k-means clustering algorithm to The eco-geological environment of the study area is divided into five categories, namely cultivated land, shrub land, swamp water, grit chamber and reservoir.

Images