CN112330194A - Ecological environment stability assessment method and equipment thereof - Google Patents
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Abstract
One or more embodiments of the present disclosure provide an evaluation method and apparatus for ecological environment stability, which is an evaluation method for ecological environment stability index based on a coefficient of variation method, by obtaining the ecological environment indexes of a plurality of research years, solving the standard deviation of the ecological environment indexes, solving the variation coefficient of the ecological environment index according to the standard deviation and the average value of the ecological environment indexes of each year to finally obtain the stability index of the regional ecological environment, determining the comprehensive stability index of the ecological environment according to the threshold value and the weight of the stability index of the regional ecological environment, realizing the quantification of the change degree of the regional ecological environment condition, therefore, the ecological environment index and the ecological environment stability of a certain region or the ecological environment indexes and the ecological environment stability of a plurality of regions are reflected more accurately, and assistance is provided for accurate evaluation of research on regional livability.
Description
Technical Field
One or more embodiments of the present disclosure relate to the field of ecological stability assessment technologies, and in particular, to an ecological stability assessment method and an apparatus thereof.
Background
The existing ecological environment evaluation indexes are mature in selection, and evaluation of a certain ecological environment element in a certain area is realized mainly by calculating a comprehensive index or a single index of ecological environment conditions, or evaluation of the habitability of the area is realized by quantitatively comparing the overall ecological environment conditions of different areas. For example, as shown in fig. 1, the average temperature in area a is 20 degrees per year, but fluctuates greatly in recent years; the average temperature in area B is 25 ℃ per year, and the change degree is small in several years. The ecological environment livable degree of A, B two places cannot be compared only by the average annual temperature; however, since the average temperature in the area a varies greatly, which means that the temperature is not stable enough, people are required to adjust the temperature to various temperatures, and compared with the area B, which has stable temperature every year, the area B is more suitable for living and living.
Therefore, the existing ecological environment evaluation indexes have the problem that ecological environment livable degrees in different areas cannot be accurately compared.
Disclosure of Invention
In view of the above, one or more embodiments of the present disclosure are directed to an ecological environment stability assessment method and an apparatus thereof, which are used as an auxiliary index for ecological livability assessment to solve all or part of the technical problems in the prior art.
In view of the above, one or more embodiments of the present specification provide an ecological environment stability assessment method, including:
determining an area for evaluating the stability of the ecological environment;
acquiring basic data of a region for evaluating the ecological environment stability index, and processing the basic data of the region to obtain a regional ecological environment index;
solving the average value of the regional ecological environment indexes, solving the standard deviation of the regional ecological environment indexes based on the average value, and solving the variation coefficient of the regional ecological environment indexes according to the standard deviation;
processing the variation coefficient of the regional ecological environment index to obtain a regional ecological environment stability index;
determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the value of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions;
and grading the regional comprehensive ecological environment stability index, and determining the regional comprehensive ecological environment stability according to the grading.
Preferably, the calculation formula of the standard deviation of the regional ecological environment index is as follows:
wherein, sigma is the standard deviation of the ecological environment index of the research year; n is the number of years of study; x is the number ofiIs the ecological environment index value of the year; mu is the average value of the regional ecological environment index in the study time.
Preferably, the calculation formula of the coefficient of variation of the regional ecological environment index is as follows:
wherein, CvIs the coefficient of variation.
Preferably, the calculation formula of the regional ecological environment stability index is as follows:
wherein ESI (environmental stability index) is the constructed ecological environment stability index.
Preferably, the determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the values of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions includes:
comparing the ecological environment stability indexes in different areas;
determining the threshold v of the ecological environment stability indexes in different areas by an expert consultation method, a questionnaire survey method or an experimental methodjAnd a weight wi；
According to a threshold value vjAnd a weight wiSolving regional synthesis studentThe attitude environment stability index is calculated according to the following formula:
wherein V is the stability index of the regional comprehensive ecological environment.
An apparatus for performing an ecological environment stability assessment method, comprising:
the region determining module is used for determining a region for evaluating the stability of the ecological environment;
the data collection and processing module is used for acquiring basic data of the region for evaluating the ecological environment stability index, and processing the basic data of the region to obtain the regional ecological environment index; solving the average value of the regional ecological environment indexes, solving the standard deviation of the regional ecological environment indexes based on the average value, solving the variation coefficient of the regional ecological environment indexes according to the standard deviation, and processing the variation coefficient of the regional ecological environment indexes to obtain regional ecological environment stability indexes; determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the value of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions;
and the grade determining module is used for grading the regional comprehensive ecological environment stability index and determining the regional comprehensive ecological environment stability according to the grading.
As can be seen from the above, the method and apparatus for evaluating ecological environment stability provided by one or more embodiments of the present disclosure is an evaluation method of ecological environment stability index based on coefficient of variation method, by obtaining the ecological environment indexes of a plurality of research years and solving the standard deviation of the ecological environment indexes, solving according to the standard deviation and the average value of the ecological environment indexes of each year to obtain the ecological environment index variation coefficient, finally obtaining the stability index of the regional ecological environment, determining the comprehensive stability index of the ecological environment according to the threshold value and the weight of the stability index of the regional ecological environment, realizing the quantification of the change degree of the regional ecological environment condition, therefore, the ecological environment index and the ecological environment stability of a certain region or the ecological environment indexes and the ecological environment stability of a plurality of regions are reflected more accurately, and assistance is provided for accurate evaluation of research on regional livability.
The application provides an index of 'ecological environment stability index', and the index is realized by quantifying the change degree of one or more ecological environment indexes influencing ecological environment conditions in a certain area within a period of time: (1) evaluating the stability of the ecological environment index in the area for a period of time; (2) based on the stability indexes of a plurality of single ecological environment indexes, carrying out comprehensive stability evaluation on the ecological environment condition; (3) comparing the change degree of single ecological environment elements of two or more regions or the comprehensive ecological environment stability.
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In order to more clearly illustrate one or more embodiments or prior art solutions of the present specification, the drawings that are needed in the description of the embodiments or prior art will be briefly described below, and it is obvious that the drawings in the following description are only one or more embodiments of the present specification, and that other drawings may be obtained by those skilled in the art without inventive effort from these drawings.
FIG. 1 is a graph showing the comparison of the annual average temperature of the area A and the area B in the background art of the present specification;
FIG. 2 is a flow diagram of a method for assessing stability of an ecological environment according to one or more embodiments of the present disclosure;
fig. 3 is a block diagram of an internal structure of an apparatus for performing a method for evaluating stability of an ecological environment according to one or more embodiments of the present disclosure.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, the present disclosure is further described in detail below with reference to specific embodiments.
It is to be noted that unless otherwise defined, technical or scientific terms used in one or more embodiments of the present specification should have the ordinary meaning as understood by those of ordinary skill in the art to which this disclosure belongs.
To be noted: for the comparison area, the larger the stability index of a single ecological environment index is, the smaller the change degree of the ecological environment index in the research time of the area is, the more stable the ecological environment index is; the larger the comprehensive stability index of the ecological environment condition is, the smaller the overall change degree of the ecological environment condition in the region within the research time is, namely the ecological environment condition is relatively stable.
It can be known that, for the existing ecological environment evaluation index, there is a problem that the ecological environment livability of different regions cannot be accurately compared, and to solve the above problem, one or more embodiments of the present specification provide an ecological environment stability evaluation method, including:
determining an area for evaluating the stability of the ecological environment;
acquiring basic data of a region for evaluating the ecological environment stability index, and processing the basic data of the region to obtain a regional ecological environment index;
solving the average value of the regional ecological environment indexes, solving the standard deviation of the regional ecological environment indexes based on the average value, and solving the variation coefficient of the regional ecological environment indexes according to the standard deviation;
processing the variation coefficient of the regional ecological environment index to obtain a regional ecological environment stability index;
determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the value of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions;
and grading the regional comprehensive ecological environment stability index, and determining the regional comprehensive ecological environment stability according to the grading.
The evaluation method is an ecological environment stability index evaluation method based on a variation coefficient method, and comprises the steps of obtaining ecological environment indexes of a plurality of research years, solving a standard deviation of the ecological environment indexes, solving according to the standard deviation and an average value of the ecological environment indexes of each year to obtain a variation coefficient, finally obtaining a stability index of regional ecological environment, determining a comprehensive ecological environment stability index according to a threshold value and a weight of the regional ecological environment stability index, and realizing quantification of the change degree of the regional ecological environment condition, so that the regional environmental index, the ecological environment stability or the ecological environment indexes of a plurality of regions and the ecological environment stability are reflected more accurately, and accurate reference is provided for auxiliary research region habitability evaluation.
The index of 'ecological environment stability index' is provided, and the change degree of one or more ecological environment indexes influencing ecological environment conditions in a certain area in a period of time is quantified to realize that: (1) evaluating the stability of the ecological environment index in the area for a period of time; (2) based on the stability indexes of a plurality of single ecological environment indexes, carrying out comprehensive stability evaluation on the ecological environment condition; (3) comparing the change degree of single ecological environment elements of two or more regions or the comprehensive ecological environment stability.
Meanwhile, in order to perform the eco-stability assessment method, one or more embodiments of the present specification provide an apparatus for performing the eco-stability assessment method, including:
the region determining module is used for determining a region for evaluating the stability of the ecological environment;
the data collection and processing module is used for acquiring basic data of the region for evaluating the ecological environment stability index, and processing the basic data of the region to obtain the regional ecological environment index; solving the average value of the regional ecological environment indexes, solving the standard deviation of the regional ecological environment indexes based on the average value, solving the variation coefficient of the regional ecological environment indexes according to the standard deviation, and processing the variation coefficient of the regional ecological environment indexes to obtain regional ecological environment stability indexes; determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the value of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions;
and the grade determining module is used for grading the regional comprehensive ecological environment stability index and determining the regional comprehensive ecological environment stability according to the grading.
Specifically, taking the remote sensing ecological environment index and four sub-indexes thereof as examples, the description of the application is that the embodiments include but are not limited to the remote sensing ecological environment index, and the method is applicable to any ecological environment index, and evaluates the stability of the regional ecological environment index and the regional comprehensive ecological environment index of the thichen district in Tianjin city, the Yongchuan district in Chongqing city, and the Panyu district in Guangdong province.
The method for evaluating stability of an ecological environment provided by the embodiment of the specification, with a flow chart as shown in fig. 2, includes the following steps:
step 201: and determining the area for evaluating the stability of the ecological environment.
In one embodiment, step 201 determines the area for evaluating the stability of the ecological environment, and selects the following areas: the Jizhou area is located in the most northern part of Tianjin city and belongs to the continental seasonal climate of warm and warm zones and semi-humid; the Yongchuan area is located in the west of Chongqing city and belongs to subtropical monsoon humid climate; the area of wine is located in southern China, Guangzhou, and belongs to subtropical marine monsoon climate.
Step 202: and acquiring basic data of the region for evaluating the ecological environment stability index, and processing the basic data of the region to obtain the regional ecological environment index.
In one embodiment, step 202 includes acquiring at least 4 years of telemetric image data for at least 3 different regions; and carrying out radiometric calibration and atmospheric correction on the obtained remote sensing image data, and cutting out a research area range by using a vector boundary file. And expressing the change of the ecological environment condition by using the greenness index, the humidity index, the heat index and the dryness index of the natural ecological environment based on the regional basic data.
And integrating the greenness index, the humidity index, the heat index and the dryness index by adopting a principal component analysis method to obtain a regional ecological environment index.
For example, the stability of the ecological environment in the three research areas selected in step 202 from 2000 to 2019 is evaluated, and the stability of the ecological environment is evaluated once every five years in the interval, that is, the stability evaluation is performed by taking the ecological environment indexes in 2000, 2005, 2010, 2015 and 2019 as examples. Landsat remote sensing image data of the research years of the three research areas are obtained from the United states geological exploration bureau official network (USGS). And carrying out radiometric calibration and atmospheric correction on the obtained remote sensing image data, and then cutting out the research area range by using the vector boundary file. Take remote sensing ecological environment index as an example. The remote sensing ecological environment index is a new ecological environment evaluation method based on remote sensing images. By acquiring remote sensing images in the area, the change of the ecological environment condition is represented by 4 important indexes of the natural ecological environment, namely a greenness index, a humidity index, a heat index and a dryness index. The information of the 4 indexes can be obtained from remote sensing images. The greenness index is a normalized vegetation index, and can be used for detecting the vegetation growth state and vegetation coverage and eliminating partial radiation errors; the humidity index represents a humidity component, and can represent the humidity of soil and vegetation which are highly related to the ecological environment in addition to open water; the dryness index is synthesized by bare soil index and building index, and the calculation formula of the dryness index is as follows: and the dryness index is (bare soil index + construction index)/2, wherein the higher the bare soil index is, the more bare the ground surface is, and the more serious the land degradation is. The heat index is characterized by the surface temperature. And integrating the four indexes by a principal component analysis method to obtain a remote sensing ecological environment index for evaluating the regional ecological environment condition, namely the regional ecological environment index.
Based on the remote sensing image data of five years in the three areas, the result of the index is calculated and shown in tables 1 to 3.
TABLE 1 calculation of the Cizhou Distinguishing index
TABLE 2 calculation of Yongchuan discrimination index
TABLE 3 calculation of wine differentiating index
Step 203: and solving the average value of the regional ecological environment indexes, solving the standard deviation of the regional ecological environment indexes based on the average value, and solving the variation coefficient of the regional ecological environment indexes according to the standard deviation.
In some embodiments, step 203 includes calculating the remote sensing ecological environment index of each year of the region, then solving the average value of the regional ecological environment index, and calculating the standard deviation of the regional ecological environment index according to the average value in the selected year time, wherein the calculation formula is as follows:
wherein, sigma is the standard deviation of the ecological environment index of the research year; n is the number of years of study; x is the number ofiIs the ecological environment index value of the year; mu is the average value of the regional ecological environment index in the study time.
And (3) solving the variation coefficient of the regional ecological environment index according to the standard deviation, wherein the calculation formula is as follows:
wherein, CvIs the coefficient of variation.
For example, the results of calculating the coefficients of variation for the three selected regions according to the data of step 202 and the above formula are shown in tables 4-6.
TABLE 4 calculation results of the coefficient of variation of each index in Jizhou region
TABLE 5 calculation results of the variation coefficient of each index in Yongchuan area
TABLE 6 calculation results of index variation coefficients of Panyu district
Step 204: and processing the variation coefficient of the regional ecological environment index to obtain the regional ecological environment stability index.
In some embodiments, step 204 processes the variation coefficient of the regional ecological environment index to obtain a regional ecological environment stability index, and according to the meaning of the variation coefficient, a larger value of the variation coefficient indicates a larger variation degree of the ecological environment index for comparison. In order to make the index with a large value represent good stability, the result of subtracting the coefficient of variation from 1 is used as the ecological environment stability index result. Namely, the calculation formula of the stability index of the regional ecological environment is as follows:
wherein ESI (environmental stability index) is the constructed ecological environment stability index. The larger the ESI value, the better the ecological stability of the area.
For example, based on the data of step 202 and step 203 and the above formula, the results of calculating the regional ecological environment stability indexes of the selected three regions are shown in table 7.
TABLE 7 calculation results of regional ecological environmental stability index
Step 205: and determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the values of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions.
In some embodiments, step 205 comprises comparing the different regional eco-stability indices; determining the threshold v of the ecological environment stability indexes in different areas by an expert consultation method, a questionnaire survey method or an experimental methodj(i.e. the optimum value or degree of change of the eco-environment index in the year of the study on the premise of ecological habitability) and the weight wi(ii) a The stability index threshold for a certain eco-index is shown in table 8.
TABLE 8 stability index threshold for a certain eco-index
For the threshold value of the comprehensive ecological environment stability, assuming that an ecological environment comprehensive index is obtained by integrating the index 1, the index 2, the index 3 and the index 4 … …, the index weight can be determined by methods such as an expert consulting method, a questionnaire survey method and a mathematical statistics method, so as to obtain the threshold value of the comprehensive index.
For stability index calculations for the eco-composite index, the fractional index weight determinations are shown in table 9.
TABLE 9 fractional exponential weighting
According to a threshold value vjAnd a weight wiSolving the stability index of the regional comprehensive ecological environment, wherein the calculation formula is as follows:
wherein V is the stability index of the regional comprehensive ecological environment.
For example, the acceptable stability change degree of each remote sensing index sub-index and the weight of each sub-index are obtained by an expert consulting method, and the ecological environment stability of the remote sensing ecological environment index is further calculated, and the stability index threshold of each ecological environment index is shown in table 10.
TABLE 10 stability index thresholds for each index
The results of dividing the 4 index stability ratings of dryness, humidity, greenness and heat according to the data of table 10 are shown in table 11.
TABLE 11 stability index for each index
According to the stability calculation results and the grading results of the indexes, the stability of the four indexes of dryness, humidity, greenness and heat of the research area in the period of 2000-2019 is obtained: dryness, humidity, greenness and index of the Jizhou area are stable, and the heat index change is generally stable; the dryness index of the Yongchuan area is stable, the humidity index and the greenness index are stable, and the heat index is generally stable; the dryness and heat indexes of the wine area are stable, and the humidity and greenness indexes are stable.
The results of determination of the indexing weights by expert consulting questionnaires are shown in table 12.
TABLE 12 fractional exponential weights
Based on the data, the stability index of the remote sensing ecological environment index is calculated, and the stability index of the obtained regional ecological environment index is shown in table 13.
TABLE 13 stability index for regional ecological environment
Obtaining a regional comprehensive ecological environment stability index according to the threshold and the weight of each sub-index, wherein the calculation formula is as follows:
V＝0.25×0.1+0.25×0.05+0.3×0.1+0.2×0.025＝0.006094。
step 206: and grading the regional comprehensive ecological environment stability index, and determining the regional comprehensive ecological environment stability according to the grading.
In some embodiments, step 206 includes obtaining a regional integrated ecological environment stability index threshold based on the regional integrated ecological environment stability index, ranking the regional integrated ecological environment stability index according to the regional integrated ecological environment stability index threshold, and determining regional integrated ecological environment stability according to the ranking.
For example, based on the regional comprehensive ecological environment stability index in step 205, a regional comprehensive ecological environment stability index threshold is obtained, and the calculation formula is as follows:
VRSEI＝1-V＝1-0.006094≈0.9939
wherein, VRSEIIs the stability index threshold value of the regional comprehensive ecological environment.
The regional comprehensive ecological environment stability index is graded according to the regional comprehensive ecological environment stability index threshold, and the grading result is shown in table 14.
Table 14 results of index classification of regional comprehensive ecological environment stability
According to the grading result, the ecological environment conditions of the thistle state area, the Yongchuan area and the wine grape area are stable in 2000-2019, and the thistle state area, the Yongchuan area and the wine grape area are suitable for living; and because the ecological environment stability index calculation result is as follows: the Panyu is in the state of Jizhou and in the Yongchuan, so the ecological environment stability of the Panyu area is stronger than those of the Jizhou and the Yongchuan, and the index stability of the Yongchuan is slightly weaker than that of the other two research areas in remote sensing ecological environment. Namely, as for the stability evaluation result of the remote sensing ecological environment index in 2000-2019, the thistle area, the Yongchuan area and the area of the wine are all ecologically suitable for living, wherein the ecological environment condition of the area of the wine is most stable and is more suitable for living.
The stability index adopted in the embodiment of the application is used as an auxiliary index of ecological livable life and still has space for improvement.
Based on the above method, an embodiment of the present invention provides an apparatus for executing an ecological environment stability assessment method, and an internal structural block diagram of the apparatus is shown in fig. 3: comprises an area determining module 301, a data collecting and processing module 302 and a grade determining module 303.
And the region determining module 301 is configured to determine a region for evaluating ecological environment stability.
The data collection and processing module 302 is configured to obtain basic data of a region for evaluating an ecological environment stability index, and process the basic data of the region to obtain a regional ecological environment index; solving the average value of the regional ecological environment indexes, solving the standard deviation of the regional ecological environment indexes based on the average value, solving the variation coefficient of the regional ecological environment indexes according to the standard deviation, and processing the variation coefficient of the regional ecological environment indexes to obtain regional ecological environment stability indexes; and determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the values of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions.
The method specifically comprises the steps of obtaining image data of different regional years, preprocessing the image data to obtain regional basic data, and obtaining remote sensing image data of at least 4 years of at least 3 different regions; and carrying out radiometric calibration and atmospheric correction on the obtained remote sensing image data, and cutting out a research area range by using a vector boundary file.
The system comprises a data acquisition module, a data processing module and a data processing module, wherein the data acquisition module is used for carrying out integrated processing on regional basic data to obtain a regional ecological environment index, solving an average value of the regional ecological environment index, solving a standard deviation of the regional ecological environment index based on the average value, solving a variation coefficient of the regional ecological environment index according to the standard deviation, and processing the variation coefficient of the regional ecological environment index to obtain a regional ecological environment stability index; and determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the values of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions.
Specifically, based on regional basic data, representing ecological environment condition change by using a greenness index, a humidity index, a heat index and a dryness index of a natural ecological environment; and integrating the greenness index, the humidity index, the heat index and the dryness index by adopting a principal component analysis method to obtain a regional ecological environment index.
And solving the average value of the regional ecological environment indexes, solving the standard deviation of the regional ecological environment indexes based on the average value, and solving the variation coefficient of the regional ecological environment indexes according to the standard deviation.
According to the meaning of the coefficient of variation, the larger the numerical value of the coefficient of variation, the larger the degree of variation of the ecological environment indexes for comparison. In order to make the index with a large value represent good stability, the result of subtracting the coefficient of variation from 1 is used as the ecological environment stability index result.
Comparing the ecological environment stability indexes in different areas; determining the threshold v of the ecological environment stability indexes in different areas by an expert consultation method, a questionnaire survey method or an experimental methodjAnd a weight wiAnd calculating the regional comprehensive ecological environment stability index according to the threshold values and the weights of the ecological environment stability indexes in different regions.
And the grade determining module 303 is configured to grade the regional comprehensive ecological environment stability index, and determine the regional comprehensive ecological environment stability according to the grade.
Specifically, the method comprises the steps of obtaining a regional comprehensive ecological environment stability index threshold value based on the regional comprehensive ecological environment stability index, grading the regional comprehensive ecological environment stability index according to the regional comprehensive ecological environment stability index threshold value, and determining the regional comprehensive ecological environment stability according to the grading.
The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
It is intended that the one or more embodiments of the present specification embrace all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of one or more embodiments of the present disclosure are intended to be included within the scope of the present disclosure.
Claims (6)
1. An ecological environment stability assessment method is characterized by comprising the following steps:
determining an area for evaluating the stability of the ecological environment;
acquiring basic data of a region for evaluating the ecological environment stability index, and processing the basic data of the region to obtain a regional ecological environment index;
solving the average value of the regional ecological environment indexes, solving the standard deviation of the regional ecological environment indexes based on the average value, and solving the variation coefficient of the regional ecological environment indexes according to the standard deviation;
processing the variation coefficient of the regional ecological environment index to obtain a regional ecological environment stability index;
determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the value of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions;
and grading the regional comprehensive ecological environment stability index, and determining the regional comprehensive ecological environment stability according to the grading.
2. The ecological environment stability assessment method according to claim 1, wherein the calculation formula of the regional ecological environment index standard deviation is as follows:
wherein, sigma is the standard deviation of the ecological environment index of the research year; n is the number of years of study; x is the number ofiIs the ecological environment index value of the year; mu is the average value of the regional ecological environment index in the study time.
3. The ecological environment stability assessment method according to claim 1, wherein the coefficient of variation of the regional ecological environment index is calculated as follows:
wherein, CvIs the coefficient of variation.
4. The ecological environment stability assessment method according to claim 1, wherein the regional ecological environment stability index is calculated as follows:
wherein ESI (environmental stability index) is the constructed ecological environment stability index.
5. The ecological environment stability assessment method according to claim 1, wherein said determining the threshold and weight of the ecological environment stability indexes of different regions by comparing the value of the ecological environment stability indexes of different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and weight of the ecological environment stability indexes of different regions comprises:
comparing the ecological environment stability indexes in different areas;
determining the threshold v of the ecological environment stability indexes in different areas by an expert consultation method, a questionnaire survey method or an experimental methodjAnd a weight wi；
According to a threshold value vjAnd a weight wiSolving the stability index of the regional comprehensive ecological environment, wherein the calculation formula is as follows:
wherein V is the stability index of the regional comprehensive ecological environment.
6. An apparatus for performing the ecological environment stability assessment method according to any one of claims 1 to 5, comprising:
the region determining module is used for determining a region for evaluating the stability of the ecological environment;
the data collection and processing module is used for acquiring basic data of the region for evaluating the ecological environment stability index, and processing the basic data of the region to obtain the regional ecological environment index; solving the average value of the regional ecological environment indexes, solving the standard deviation of the regional ecological environment indexes based on the average value, solving the variation coefficient of the regional ecological environment indexes according to the standard deviation, and processing the variation coefficient of the regional ecological environment indexes to obtain regional ecological environment stability indexes; determining the threshold and the weight of the ecological environment stability indexes in different regions by comparing the value of the ecological environment stability indexes in different regions, and calculating the regional comprehensive ecological environment stability index according to the threshold and the weight of the ecological environment stability indexes in different regions;
and the grade determining module is used for grading the regional comprehensive ecological environment stability index and determining the regional comprehensive ecological environment stability according to the grading.
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| CN106599601A (en) * | 2016-12-29 | 2017-04-26 | 中国科学院遥感与数字地球研究所 | Remote sensing assessment method and system for ecosystem vulnerability |
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| KR20130113215A (en) * | 2012-04-05 | 2013-10-15 | (주)유엔이 | Ecological environment evaluation system and method thereof |
| CN106599601A (en) * | 2016-12-29 | 2017-04-26 | 中国科学院遥感与数字地球研究所 | Remote sensing assessment method and system for ecosystem vulnerability |
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