CN110188986A - In conjunction with the ecological risk evaluating method of landscape pattern and the regional ecological risk factor - Google Patents
In conjunction with the ecological risk evaluating method of landscape pattern and the regional ecological risk factor Download PDFInfo
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Abstract
The invention discloses the ecological risk evaluating method of a kind of combination landscape pattern and the regional ecological risk factor, this method includes 1) to Division risk assessment unit to be evaluated；2) risk receptor and ecological endpoint are determined, risk source is analyzed, with its probability and intensity reflection risk source to the extent of injury of receptor, obtains the danger level (P) of risk source；3) contact exposure relationship of the risk source with receptor in basin is studied, to the vulnerability measurement of the ecosystem, with the landscape degree of disturbance exponential representation different type ecosystem by extraneous annoyance level, fragile degree index reflects the vulnerability of structure inside the ecosystem, obtains the vulnerability (D) of the ecosystem；4) using the potential loss degree of ecological asset characterization risk receptor, the degree of loss (L) of risk receptor is obtained；5) ecological risk assessment model is constructed, ecological risk (ER) is considered as to the danger level (P) of risk source, the vulnerability (D) of the ecosystem, the continuous function of the degree of loss (L) of risk receptor.
Description
Technical field
The present invention relates to GIS technology, remote sensing technology and landscape ecology technical fields, it particularly relates to which one kind is based on
The ecological risk evaluating method of GIS technology and remote sensing technology.
Background technique
Ecological risk is the ecosystem and its risk that component is born, and is primarily upon in certain area, is had uncertain
Property accident or disaster to the ecosystem and its issuable detrimental effect of component, there is uncertainty, harmfulness, objective
The features such as property, complexity and dynamic.Ecological risk assessment is exactly the process that unfavorable ecology influence possibility occurs for evaluation, is root
The process of unknown consequence is predicted according to limited given data.Currently, geography and the area of ecological process of ecology-oriented risk assessment
The thought of domain integrated approach and coupling landscape and ecological process is the primary study content in ecological risk assessment field, therefore, existing
Some research mainly carries out ecological risk assessment from landscape, regional perspective.Regional ecological risk assessment is survey region scale
The kinds of risks factors such as environmental pollution, artificial stress or natural calamity in the upper different type ecosystem make assessment endpoint
At a possibility that adverse effect and potential hazard degree, the synthesis for only stressing multiple risks is stacked, and has ignored landscape pattern's knot
Structure acts on the long-term accumulated effect of risk source.In addition to this, regional ecological risk assessment more considers risk source, risk receptor
And its habitat, the attribute of ecosystem itself also should be more paid close attention on assessment endpoint.Landscape Ecological Risk Assessment relies on landscape
Ecological ecological process couples associated visual angle with spatial framework, with determine under the influence of nature or human factor landscape pattern with
The issuable negative consequence of ecological process interaction.It is integrally-built to change and move due to the height heterogeneity of landscape
State process is relatively slower, quantitatively characterizing of the existing research for the internal association of landscape ecological risk and its in risk assessment
Lack due care.Current Landscape Ecological Risk Assessment method lacks when choosing and calculating pattern index and landscape system
The connection of each level Ecological Loss, the ecological risk under multiple target is oriented to not only includes direct losses suffered by human society,
The judge of the measurement and these Ecological Loss of the loss of different brackets system ecology to mankind's happiness potential impact should more be paid close attention to.
Summary of the invention
For above-mentioned technical problem in the related technology, the invention proposes a kind of combination landscape pattern and local area ecological wind
The ecological risk evaluating method of the dangerous factor.This method chooses Landscape Ecological Risk Assessment index, danger level, ecology from risk source
Comprehensive ecological risk evaluation model is constructed in terms of the vulnerability of system, the degree of loss of risk receptor three, utilizes RS and GIS techniques
Evaluation result is visualized, and then obtains the ecological risk situation and spatial distribution characteristic in region to be evaluated.With previous evaluation
Method is compared, and has regional ecological risk assessment in conjunction with the ecological risk evaluating method of landscape pattern and the regional ecological risk factor
Mankind's activity or natural calamity are described on the basis of analyzing landscape pattern's structure with the advantage of landscape risk assessment respectively
To influence and harm that the ecosystem in region generates, and ecological asset is introduced as risk receptor degree of loss, by landscape system
The generation of each level Ecological Loss is associated with risk evaluation results, pays close attention to substance, the energy of the ecosystem in the presence of ecological risk
Measure the extent of damage under set landscape pattern.This method is the ecological risk assessment under multiple-factor participates in, and not only includes nature
Disaster direct losses, the ecosystem caused by the ecosystem have been more concerned about different lifes from the resistivity for facing risk
The measurement of state system loss and these Ecological Loss are to potential impact existing for mankind's happiness.To realize the above-mentioned technical purpose,
The technical scheme of the present invention is realized as follows:
A kind of ecological risk evaluating method of combination landscape pattern and the regional ecological risk factor, comprising the following steps:
Step S1 carries out evaluation unit division to area to be evaluated, in this, as risk assessment unit；
Step S2, to risk Source Description and analysis, with its probability and intensity come reflect risk source to the extent of injury of receptor,
Obtain the danger level (P) of risk source；
Step S3 carries out the selection of risk receptor and the determination of ecological endpoint, contact exposure of the research risk source with receptor
Relationship measures the vulnerability of the ecosystem, the ecology reflected with landscape degree of disturbance exponential representation different landscape type
System is reflected the vulnerability of structure inside the ecosystem, obtains the ecosystem by extraneous annoyance level, fragile degree index
Vulnerability (D)；
Step S4, and using the potential loss degree of ecological asset characterization risk receptor, obtain the degree of loss of risk receptor
(L)；
Step S5 constructs the ecological risk assessment mould based on landscape pattern based on the analysis and integration of above several levels
River basin ecological risk (ER) is considered as the danger level (P) based on risk source by type, the vulnerability (D) of the ecosystem, risk receptor
The continuous function of degree of loss (L) three is evaluated with the ecological risk that this treats evaluation region.
Further, step S1 includes:
Using risk cell as unit evaluation specific region, evaluation unit division is carried out in conjunction with the characteristics of specific region, by it
It is divided into the risk cell of N km × N km；
Further, step S2 includes:
(1) risk source is the one or more source pressures adversely affected to region environment.It need to be according to specific
The ecological state in region carries out the selection of risk source, and such as selection flood, arid, the soil erosion, disposal of pollutants refer to for risk source
Mark；
(2) different degrees of influence can be generated to receptor by acting on its intensity of the risk source of receptor and size, therefore to wind
Dangerous source, which carries out classification, can effectively embody the difference of risk source density of infection.The characteristics of for composite risk source, introduces
Relative weight coefficient characterizes the danger level size of the risk source of different type and rank, is finally commented with the synthesis of risk source danger level
Valence index carrys out the intensity that different risk sources occur in reflecting regional.
Wherein, PkIndicate the comprehensive evaluation index of risk source danger level in k-th of risk cell；Pi' indicate k-th of risk
The danger level of i-th class risk source in cell；αiIndicate the relative weighting of the i-th class risk source；N is total number of types of risk source；Lij
Indicate the danger level index of jth grade in the i-th class risk source in k-th of risk cell；βijIndicate jth etc. in the i-th class risk source
The risk source weight of grade；M is total number of levels of risk source.
Further, step S3 includes:
(1) risk receptor and ecological endpoint analysis.The risk that risk receptor is exposed under risk source subjects, and is ecology
The constituent and structural element of environment can make quick and accurate response to the change of environment.Risk receptor is usually
The element most sensitive to external disturbance, can be organism or inorganic matter.Principle based on landscape ecology, by area to be evaluated
As risk receptor, regional ecological environment and vegetation characteristic distributions in bond area carry out landscape pattern for the landscape pattern in domain
It divides, generally comprises the ecosystem that different vegetation major class, construction land and waters represent；
(2) structure and spatial distribution of landscape pattern have different features on the responsiveness of confrontation external interference.
This method is according to Landscape Ecology Principle, with the journey of external interference suffered by landscape degree of disturbance index characterization different landscape pattern
Degree.This method chooses Scenic Bridges, view globality and Landscape isolation as Measure Indexes, passes through being overlapped mutually for three
Obtain landscape degree of disturbance index Et, to reflect annoyance level that different landscape type is subject to:
Et=aCt+bDt+cNt
In formula, EtIndicate landscape degree of disturbance index；CtIndicate Scenic Bridges；DtIndicate view globality；NtIndicate landscape
Separating degree；A, b, c indicate degree of fragmentation, dominance, the weight of separating degree (a+b+c=1), and then obtain all kinds of ecological indexes.
Scenic Bridges embody the entire ecosystem or its constituent under by external interference, and structure is by list
One, homogeneous, continuously to process that is complicated, heterogeneous, discontinuously changing, reflect the divided degree of fragmentation of landscape and natural resources
Protected degree, formula are as follows:
In formula, ntFor the patch number of landscape types t；AtFor the gross area of landscape types t.
Landscape isolation reflects the dispersion degree of different element individual distributions in a certain landscape types, and value is bigger, scape
Sight more disperses in spatial distribution, formula are as follows:
In formula, ntFor the patch number of landscape types t；AtFor the gross area of landscape types t；A is the gross area of all landscapes.
View globality reflects different landscape element status shared in landscape, is inversely proportional with diversity indices,
Value is bigger, shows that the quantity of the region patch and area ratio differ greatly, the quantity of main landscape element is more, formula are as follows:
In formula, UtSample prescription number/gross sample number formulary that=patch occurs；VtThe number of=patch/patch total number；Lt=patch
Area/patch gross area.
(3) landscape fragile degree index reflects the vulnerability and its generation that the ecosystem is shown when by external interference
The complexity of Back Up, it is in close relations with external interference, the structure of landscape pattern itself and the mutual mode of action.One
As for, in landscape initial stage, species diversity is less, the simple ecosystem of matter and energy cyclic process, landscape
Fragile degree index is bigger, and the ecosystem is weaker to the resistivity of external interference, and the ecosystem is more easily damaged.According to research area
The characteristics of ecologic structure and risk source, sorts to the fragile degree of each landscape types and assigns corresponding weight, to indicate its fragility
Resulting weight is finally standardized by the size of degree, obtains the fragile degree index F of all kinds of landscapest。
(4) it is superimposed by landscape degree of disturbance index and landscape fragile degree index, building reflection ecosystem potential risk
Ecosystem rapid wear sex index, to measure the extent of damage of the ecosystem.By the structure of each risk cell Study of Platycladus orientalis-Robinia pseudoacacia ecosystem
Be converted into the evaluation variable of ecological risk with the response characteristic of confrontation external interference, establish landscape structure and regional ecological risk it
Between connection, and then obtain the rapid wear sex index of the ecosystem.
In formula, DkIndicate the ecosystem rapid wear sex index of k-th of risk cell；The number of l expression landscape types；SktTable
Show the area of t landscape types in k-th of risk cell；SkIndicate the gross area of k-th of risk cell；EtIndicate landscape interference
Spend index；FtIndicate landscape fragile degree index.
Further, step S4 includes:
By merging structural pattern, function superiority and inferiority and the value of ecosystem service of landscape, one region institute of comprehensive assessment
The ecological risk of receiving.Ecosystem-type, vegetative coverage by ecological asset remote sensing computation model, in conjunction with specific region
Degree, precipitation, evapotranspiration, soil erosion amount etc. carry out ecological asset calculating to the ecosystem that all kinds of landscape types represent, obtain
To the ecological asset spatial framework in region to be evaluated, the potential loss degree L of risk receptor is measured with it.
Further, step S5 includes:
According to risk source and risk receptor analysis, exposed and hazard analysis, risk characterization conceptual model and local area ecological
The thought of risk assessment constructs comprehensive ecological risk evaluation model, and each risk cell for treating evaluation region carries out ecological wind
River basin ecological risk (ER) is considered as the danger level (P) based on risk source by danger evaluation, the vulnerability (D) of the ecosystem, risk by
The continuous function of degree of loss (L) three of body, establishes ecological risk model, obtains the comprehensive ecological risk of each risk cell k
Index using Kriging interpolation method, and then obtains the Rate of aggregative risk result in research area.
ERk=Pk×Dk×Lk
In formula, ERkIndicate the comprehensive ecological risk index of k-th of risk cell；PkIndicate risk in k-th of risk cell
The comprehensive evaluation index of source danger level；DkIndicate the ecosystem rapid wear sex index of k-th of risk cell；LkIndicate k-th of risk
Ecological asset in cell.
After adopting the above technical scheme, beneficial effects of the present invention: Landscape Ecological Risk Assessment index is chosen, from risk source
Danger level, the vulnerability of the ecosystem, comprehensive ecological risk evaluation model is constructed in terms of the degree of loss of risk receptor three, utilize
RS and GIS techniques visualize evaluation result, and then obtain the ecological risk situation and spatial distribution characteristic in region to be evaluated.
Compared with previous evaluation method, junction closes landscape pattern and the ecological risk evaluating method of the regional ecological risk factor has area
The advantage of domain ecological risk assessment and landscape risk assessment respectively describes the mankind on the basis of analyzing landscape pattern's structure
The influence and harm that activity or natural calamity generate the ecosystem in region, and introduce ecological asset and lost as risk receptor
Degree, the generation of each level Ecological Loss of landscape system is associated with risk evaluation results, pay close attention to ecology in the presence of ecological risk
The extent of damage of the substance, energy of system under set landscape pattern.This method is the ecological risk assessment under multiple-factor participates in,
Not only comprising natural calamity direct losses, the ecosystem caused by the ecosystem certainly in the resistivity for facing risk, more
The measurement for having paid close attention to Different ecosystems loss and these Ecological Loss are to potential impact existing for mankind's happiness.It is comprehensive by this
Molding type be capable of it is more comprehensive, it is accurate prediction and measurement specific region ecological risk, for Regional Eco-construction, prevent and reduce natural disasters,
Safeguard that river basin ecological provides safely decision and foundation.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below.Based on the reality in the present invention
Example is applied, those of ordinary skill in the art's every other embodiment obtained shall fall within the protection scope of the present invention.The present invention mentions
The ecological risk evaluating method of a kind of combination landscape pattern and the regional ecological risk factor out, technical solution are realized in
:
A kind of ecological risk evaluating method of combination landscape pattern and the regional ecological risk factor, comprising the following steps:
Step S1 carries out evaluation unit division to area to be evaluated, in this, as risk assessment unit；
Step S2, to risk Source Description and analysis, with its probability and intensity come reflect risk source to the extent of injury of receptor,
Obtain the danger level (P) of risk source；
Step S3 carries out the selection of risk receptor and the determination of ecological endpoint, contact exposure of the research risk source with receptor
Relationship measures the vulnerability of the ecosystem, the ecology reflected with landscape degree of disturbance exponential representation different landscape type
System is reflected the vulnerability of structure inside the ecosystem, obtains the ecosystem by extraneous annoyance level, fragile degree index
Vulnerability (D)；
Step S4, and using the potential loss degree of ecological asset characterization risk receptor, obtain the degree of loss of risk receptor
(L)；
Step S5 constructs the ecological risk assessment mould based on landscape pattern based on the analysis and integration of above several levels
River basin ecological risk (ER) is considered as the danger level (P) based on risk source by type, the vulnerability (D) of the ecosystem, risk receptor
The continuous function of degree of loss (L) three is evaluated with the ecological risk that this treats evaluation region.
Further, step S1 includes:
Using risk cell as unit evaluation specific region, evaluation unit division is carried out in conjunction with the characteristics of specific region, by it
It is divided into the risk cell of N km × N km；
Further, step S2 includes:
(1) risk source is the one or more source pressures adversely affected to region environment.It need to be according to specific
The ecological state in region carries out the selection of risk source, and such as selection flood, arid, the soil erosion, disposal of pollutants refer to for risk source
Mark；
(2) different degrees of influence can be generated to receptor by acting on its intensity of the risk source of receptor and size, therefore to wind
Dangerous source, which carries out classification, can effectively embody the difference of risk source density of infection.The characteristics of for composite risk source, introduces
Relative weight coefficient characterizes the danger level size of the risk source of different type and rank, is finally commented with the synthesis of risk source danger level
Valence index carrys out the intensity that different risk sources occur in reflecting regional.
Wherein, PkIndicate the comprehensive evaluation index of risk source danger level in k-th of risk cell；Pi' indicate k-th of risk
The danger level of i-th class risk source in cell；αiIndicate the relative weighting of the i-th class risk source；N is total number of types of risk source；Lij
Indicate the danger level index of jth grade in the i-th class risk source in k-th of risk cell；βijIndicate jth etc. in the i-th class risk source
The risk source weight of grade；M is total number of levels of risk source.
Further, step S3 includes:
(1) risk receptor and ecological endpoint analysis.The risk that risk receptor is exposed under risk source subjects, and is ecology
The constituent and structural element of environment can make quick and accurate response to the change of environment.Risk receptor is usually
The element most sensitive to external disturbance, can be organism or inorganic matter.Principle based on landscape ecology, by area to be evaluated
As risk receptor, regional ecological environment and vegetation characteristic distributions in bond area carry out landscape pattern for the landscape pattern in domain
It divides, generally comprises the ecosystem that different vegetation major class, construction land and waters represent；
(2) structure and spatial distribution of landscape pattern have different features on the responsiveness of confrontation external interference.
This method is according to Landscape Ecology Principle, with the journey of external interference suffered by landscape degree of disturbance index characterization different landscape pattern
Degree.This method chooses Scenic Bridges, view globality and Landscape isolation as Measure Indexes, passes through being overlapped mutually for three
Obtain landscape degree of disturbance index Et, to reflect annoyance level that different landscape type is subject to:
Et=aCt+bDt+cNt
In formula, EtIndicate landscape degree of disturbance index；CtIndicate Scenic Bridges；DtIndicate view globality；NtIndicate landscape
Separating degree；A, b, c indicate degree of fragmentation, dominance, the weight of separating degree (a+b+c=1), and then obtain all kinds of ecological indexes.
Scenic Bridges embody the entire ecosystem or its constituent under by external interference, and structure is by list
One, homogeneous, continuously to process that is complicated, heterogeneous, discontinuously changing, reflect the divided degree of fragmentation of landscape and natural resources
Protected degree, formula are as follows:
In formula, ntFor the patch number of landscape types t；AtFor the gross area of landscape types t.
Landscape isolation reflects the dispersion degree of different element individual distributions in a certain landscape types, and value is bigger, scape
Sight more disperses in spatial distribution, formula are as follows:
In formula, ntFor the patch number of landscape types t；AtFor the gross area of landscape types t；A is the gross area of all landscapes.
View globality reflects different landscape element status shared in landscape, is inversely proportional with diversity indices,
Value is bigger, shows that the quantity of the region patch and area ratio differ greatly, the quantity of main landscape element is more, formula are as follows:
In formula, UtSample prescription number/gross sample number formulary that=patch occurs；VtThe number of=patch/patch total number；Lt=patch
Area/patch gross area.
(3) landscape fragile degree index reflects the vulnerability and its generation that the ecosystem is shown when by external interference
The complexity of Back Up, it is in close relations with external interference, the structure of landscape pattern itself and the mutual mode of action.One
As for, in landscape initial stage, species diversity is less, the simple ecosystem of matter and energy cyclic process, landscape
Fragile degree index is bigger, and the ecosystem is weaker to the resistivity of external interference, and the ecosystem is more easily damaged.According to research area
The characteristics of ecologic structure and risk source, sorts to the fragile degree of each landscape types and assigns corresponding weight, to indicate its fragility
Resulting weight is finally standardized by the size of degree, obtains the fragile degree index F of all kinds of landscapest。
(4) it is superimposed by landscape degree of disturbance index and landscape fragile degree index, building reflection ecosystem potential risk
Ecosystem rapid wear sex index, to measure the extent of damage of the ecosystem.By the structure of each risk cell Study of Platycladus orientalis-Robinia pseudoacacia ecosystem
Be converted into the evaluation variable of ecological risk with the response characteristic of confrontation external interference, establish landscape structure and regional ecological risk it
Between connection, and then obtain the rapid wear sex index of the ecosystem.
In formula, DkIndicate the ecosystem rapid wear sex index of k-th of risk cell；The number of l expression landscape types；SktTable
Show the area of t landscape types in k-th of risk cell；SkIndicate the gross area of k-th of risk cell；EtIndicate landscape interference
Spend index；FtIndicate landscape fragile degree index.
Further, step S4 includes:
By merging structural pattern, function superiority and inferiority and the value of ecosystem service of landscape, one region institute of comprehensive assessment
The ecological risk of receiving.Ecosystem-type, vegetative coverage by ecological asset remote sensing computation model, in conjunction with specific region
Degree, precipitation, evapotranspiration, soil erosion amount etc. carry out ecological asset calculating to the ecosystem that all kinds of landscape types represent, obtain
To the ecological asset spatial framework in region to be evaluated, the potential loss degree L of risk receptor is measured with it.
Further, step S5 includes:
According to risk source and risk receptor analysis, exposed and hazard analysis, risk characterization conceptual model and local area ecological
The thought of risk assessment constructs comprehensive ecological risk evaluation model, and each risk cell for treating evaluation region carries out ecological wind
River basin ecological risk (ER) is considered as the danger level (P) based on risk source by danger evaluation, the vulnerability (D) of the ecosystem, risk by
The continuous function of degree of loss (L) three of body, establishes ecological risk model, obtains the comprehensive ecological risk of each risk cell k
Index using Kriging interpolation method, and then obtains the Rate of aggregative risk result in research area.
ERk=Pk×Dk×Lk
In formula, ERkIndicate the comprehensive ecological risk index of k-th of risk cell；PkIndicate risk in k-th of risk cell
The comprehensive evaluation index of source danger level；DkIndicate the ecosystem rapid wear sex index of k-th of risk cell；LkIndicate k-th of risk
Ecological asset in cell.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of ecological risk evaluating method of combination landscape pattern and the regional ecological risk factor, including risk assessment unit are drawn
Sub-module, the danger level index computing module of risk source, the ecosystem vulnerability index computing module, risk receptor loss
Spend index computing module and comprehensive ecological risk index computing module；Wherein,
The risk assessment dividing elements module carries out evaluation unit division to area to be evaluated；
The danger level index computing module of the risk source, since being used for risk source progress classification in reflecting regional not
The intensity occurred with risk source；
The vulnerability index computing module of the ecosystem, the structure of each risk cell Study of Platycladus orientalis-Robinia pseudoacacia ecosystem and confrontation is outer
The response characteristic of boundary's interference is converted into the evaluation variable of ecological risk, to obtain the vulnerability measurement of the ecosystem；
The degree of loss index computing module of the risk receptor, for each level ecology of landscape system under clear View of Complexity
The producing cause of loss and its interrelated, and be more focused on concern different brackets system ecology loss measurement and these
The potential impact that Ecological Loss generates mankind's happiness；
The comprehensive ecological risk index computing module obtains area to be evaluated for constructing comprehensive ecological risk evaluation model
Rate of aggregative risk result.
2. the ecological risk evaluating method of combination landscape pattern and the regional ecological risk factor according to claim 1, institute
Risk assessment dividing elements module is stated to specifically include:
Evaluation unit division is carried out according to the characteristics of research area first, is divided into the risk cell of N km × N km.
3. the ecological risk evaluating method of combination landscape pattern and the regional ecological risk factor according to claim 1, institute
The danger level index computing module for stating risk source specifically includes:
The selection of risk source is carried out according to the ecological state of specific region, such as chooses flood, arid, the soil erosion, disposal of pollutants
Deng for risk source index；
The characteristics of for composite risk source, the danger level for introducing the risk source of relative weight coefficient characterization different type and rank are big
It is small, the intensity that different risk sources occur in reflecting regional is come with the comprehensive evaluation index of risk source danger level.
4. the ecological risk evaluating method of combination landscape pattern and the regional ecological risk factor according to claim 1, institute
The vulnerability index computing module for stating the ecosystem specifically includes:
Risk receptor and ecological endpoint are analyzed, using the landscape pattern in region to be evaluated as risk receptor, bond area
Interior regional ecological environment and vegetation characteristic distributions divides landscape pattern；
The ecosystem reflected with landscape degree of disturbance exponential representation different landscape type is by extraneous annoyance level, fragile degree
Index reflects the vulnerability of structure inside the ecosystem, is superimposed by landscape degree of disturbance index and landscape fragile degree index, building
Reflect the ecosystem rapid wear sex index of ecosystem potential risk.
5. the ecological risk evaluating method of combination landscape pattern and the regional ecological risk factor according to claim 1, institute
The degree of loss index computing module for stating risk receptor includes:
Using the potential loss degree of ecological asset characterization risk receptor, covered in conjunction with the ecosystem-type of specific region, vegetation
Cover degree, precipitation, evapotranspiration, soil erosion amount etc. carry out ecological asset calculating to the ecosystem that all kinds of landscape types represent,
The degree of loss index of risk receptor is obtained, the potential loss degree of risk receptor is measured with it.
6. the ecological risk evaluating method of combination landscape pattern and the regional ecological risk factor according to claim 1, institute
Stating comprehensive ecological risk index computing module includes:
Comprehensive ecological risk evaluation model is constructed, each risk cell for treating evaluation region carries out ecological risk assessment, will give birth to
State risk is considered as the danger level based on risk source, the vulnerability of the ecosystem, the continuous function of the degree of loss three of risk receptor,
Ecological risk model is established, the comprehensive ecological risk index of each risk cell is obtained, using Kriging interpolation method, and then
To the Rate of aggregative risk result in research area.
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| CN111144775A (en) * | 2019-12-30 | 2020-05-12 | 四川省自然资源科学研究院 | Landscape pattern-based ecological risk evaluation method for total planning of rural land utilization |
| CN111652522A (en) * | 2020-06-09 | 2020-09-11 | 中国环境科学研究院 | Ecological risk assessment method for natural protected area |
| CN112860830A (en) * | 2021-01-28 | 2021-05-28 | 中南林业科技大学 | Ecological vulnerability space-time feature extraction method and aggregation judgment method for lake wetland landscape |
| CN113505510A (en) * | 2021-07-13 | 2021-10-15 | 四川师范大学 | Ecological safety pattern recognition method fusing landscape index and random walk model |
| CN114118854A (en) * | 2021-12-03 | 2022-03-01 | 中国科学院地理科学与资源研究所 | Method and device for evaluating influence of road network expansion on landscape ecological risks |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111144775A (en) * | 2019-12-30 | 2020-05-12 | 四川省自然资源科学研究院 | Landscape pattern-based ecological risk evaluation method for total planning of rural land utilization |
| CN111652522A (en) * | 2020-06-09 | 2020-09-11 | 中国环境科学研究院 | Ecological risk assessment method for natural protected area |
| CN112860830A (en) * | 2021-01-28 | 2021-05-28 | 中南林业科技大学 | Ecological vulnerability space-time feature extraction method and aggregation judgment method for lake wetland landscape |
| CN112860830B (en) * | 2021-01-28 | 2024-03-29 | 中南林业科技大学 | Ecological weakness space-time characteristic extraction method and aggregation judgment method for lake wetland landscape |
| CN113505510A (en) * | 2021-07-13 | 2021-10-15 | 四川师范大学 | Ecological safety pattern recognition method fusing landscape index and random walk model |
| CN114118854A (en) * | 2021-12-03 | 2022-03-01 | 中国科学院地理科学与资源研究所 | Method and device for evaluating influence of road network expansion on landscape ecological risks |
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