CN108537439A - A kind of multiple dimensioned landscape pattern in basin and water quality index relationship research method - Google Patents
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Abstract
The invention discloses a kind of multiple dimensioned landscape patterns in the basin based on remote sensing image data and water quality index relationship research method, this method includes 1) utilizing multi-spectrum remote sensing image and high-resolution remote sensing image, fusion " collection of illustrative plates " feature extraction valley sight source remittance pattern information;2) Law of DEM Data (DEM) and land use classes data, after dividing basin minimum Hydrologic response units, the location-weighted landscape contrast index after computed improved are based on;3) by calculating separately the Spearman related coefficients of landscape indices, water quality index, structure is comprehensive and redundancy is low landscape indices system and water quality index system;4) multi-variables analysis and Canonical correspondence analysis method are utilized, studies the relationship of landscape indices and water quality index under multiple space and time scales respectively.The present invention is by improving a kind of landscape index, and the influences of the scales to landscape pattern and non-point pollution relational process such as space-time are considered in subsequent analysis, so that analysis result has more Ecology Action, efficiently solve the problems, such as that traditional analysis best research scale when analyzing the relationship of the two is uncertain.
Description
Technical field
The present invention relates to remote sensing technologies and landscape ecology technical field, it particularly relates to which a kind of being based on remote sensing technology
The multiple dimensioned landscape pattern in basin and water quality index relationship research method.
Background technology
The Spatial Heterogeneous Environment characteristic in basin determines landscape structure complexity, merges the complementary advantage of " figure-spectrum " characteristic information,
Basin non-point pollution landscape source can utmostly be promoted and converge the precision and intelligent of pattern key area extraction.In conjunction with non-dots
Source pollution ecology process, Non-point Source Pollutants will pass through not during by generating being pooled to water body with processes such as rainwashes
Same Yuan Hui types landscape pattern, therefore source remittance type composition, space structure and arrangement mode etc. of landscape pattern will certainly shadows
The transmission of Non-point Source Pollutants is rung, and then influences water quality.It is discharged by Fertility in Intensive Agricultural in face of agricultural pollution substance in basin
The pressure of industry development, it is difficult under the conditions of the socio-economic development for realizing decrement, need in basin non-point pollution landscape source remittance lattice
Water quality impact relationship aspect quantification scientific theory is supported in office's space structure and its configuration with method.Existing landscape pattern grinds
In studying carefully, the result of calculation of landscape index does not have ecological significance, compared to the source remittance categorical data of gridding, with a numerical value
Landscape pattern's feature that result of calculation is come under image study scale is that do not have convincingness, is searched to the bottom, Traditional Landscape index
Result of calculation do not have Spatial Difference.In addition to this, landscape pattern and water quality index relationship are often ignored in existing research
In scale effect, under different Research scales, landscape pattern is to the effect of certain class or a few class water quality index can there were significant differences.
There will be a series of problem based on this landscape pattern and water quality index relationship result of study
Invention content
For above-mentioned technical problem in the related technology, it is multiple dimensioned that the present invention proposes a kind of basin based on remote sensing technology
Landscape pattern and water quality index relationship research method, efficiently solve traditional analysis best research when analyzing the relationship of the two
The uncertain problem of scale.Utilize multi-spectrum remote sensing image and high-resolution remote sensing image extraction earth's surface source remittance type information, profit
Minimum Hydrologic response units are divided with dem data and earth's surface land use data, are being calculated based on minimum Hydrologic response units
On the basis of location-weighted landscape contrast index, comprehensive and low redundancy landscape index and water quality are built using rank analysis method
Index system finally analyzes landscape lattice from Canonical correspondence analysis method using multivariate correlation analysis under different spatial and temporal scales
Correlativity between office's index and water quality index.
To realize the above-mentioned technical purpose, the technical proposal of the invention is realized in this way:
A kind of multiple dimensioned landscape pattern in basin based on remote sensing technology and water quality index relationship research method, including following step
Suddenly:
Step S1, the valley sight source remittance pattern information extraction of fusion " collection of illustrative plates " feature;
Step S2, the location-weighted landscape contrast index based on minimum water unit calculate;
Step S3, the landscape indices and water quality index system construction, for building comprehensive and low redundancy scape
See index number system and water quality index system;
Step S4, the landscape indices choose module and landscape indices and water quality index relationship with water quality index
Research;
Further, step S1 includes:
(1) remote sensing image " collection of illustrative plates " feature extraction, carries for the shape to high spatial resolution satellite image, textural characteristics
It takes and the spectral band information extraction of centering resolution multi-spectral satellite image works;
(2) fusion " collection of illustrative plates " feature landscape types extraction, for according to the distinctive shape of different landscape, texture information with
And landscape source remittance type information is extracted in turn to distinguish in the variation of different-waveband reflectivity;
Further, step S2 includes:
(1) minimum Hydrologic response units divide, the minimum Research scale calculated for division index;
(2) source remittance landscape types amendment and geographic influence factor correction, pass for weighing Non-point Source Pollutants in basin
By the influence degree of geographic factor when defeated;
(3) location-weighted landscape contrast index calculation formula is expressed as:
HRULCIi=Wi*Ai
Wherein, i indicates that a certain specific HRU, Ai indicate that the area of the HRU, Wi indicate productions of the HRU to Non-point Source Pollutants
Life/rejection coefficient, Wi are influenced by Land-Use, soil property, precipitation and applying quantity of chemical fertilizer etc., consider non-point source
Pollutant need to be modified different geographic factors, Wi is represented by by the process of HRU generations/decay and eventually enter into water body:
Wi=F (L, P, R, D, N, S, F, A)
Wherein, L represents land use pattern correction factor, and P represents gradient correction factor, and R represents average annual precipitation amendment
Coefficient, D represent distance factor correction factor, and N represents NDVI correction factors, and S represents soil texture correction factor, and F represents chemical fertilizer
Using quantity correction coefficient, A represents the correction factor of Effective Soil Water Content.
Meanwhile to allow the space load correlation index between different HRU to compare, the dirt to different landscape source remittance type
Dye object correction factor is standardized, i.e.,:
Wherein Wi is the Non-point Source Pollutants correction factor of certain land use landscape, and WMAX refers to soil in valley sight
Utilize the maximum value of Non-point Source Pollutants correction factor under landscape.If Non-point Source Pollutants there are many in HRU,:
HRULCIXY=HRULCIX+HRULCIY
Wherein, HRULCIY is landscape load factors of the Non-point Source Pollutants Y in HRU, and HRULCIXY is pollutant X and Y
Landscape load factor summation in HRU.
For sub-basin, the calculating of non-point pollution landscape load factor is expressed as:
Wherein N represents landscape types in sub-basin as the HRU total numbers of source landscape, and i represents HRU.
Further, step S4 includes:
(1) multi-space Research scale selects, for according to research area source remittance landscape and hydrology period feature, selection to have generation
The time scale (vegetation key phenological period) of table and space scale (Watershed Scale, catchment scale, buffering area scale) conduct
The Research scale of relationship research;
(2) landscape indices system and hydrology index body relationship analysis, for being studied between the two under multiple space and time scales
Correlativity.
After adopting the above technical scheme, beneficial effects of the present invention:The relationship research of landscape pattern and water quality index is distant
Important application of the sense technology in basin non-point pollution ecological process research considers that the scale effect of ecological process, research exist
Landscape pattern contributes to the relationship of water quality index to choose the best scale studied under different time and space scales.The present invention is directed to non-dots
The big feature of spatio-temporal difference is polluted in source, improves location-weighted landscape contrast index, is ground suitable for the basin under various scales
Study carefully, the structure links of wherein landscape indices and water quality index solve the problems, such as between index redundancy it is high this.The present invention has
Help optimize remittance pattern in non-point pollution landscape source in basin, while ecological evaluation and non-point pollution prevention and control have in watershed
Significance.
Specific implementation mode
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, the every other embodiment that those of ordinary skill in the art are obtained shall fall within the protection scope of the present invention.The present invention carries
The multiple dimensioned landscape pattern in a kind of basin based on remote sensing technology gone out and water quality index relationship research method, technical solution is in this way
It realizes:
A kind of multiple dimensioned landscape pattern in basin based on remote sensing technology and water quality index relationship research method, including following step
Suddenly:
Step S1, the valley sight source remittance pattern information extraction of fusion " collection of illustrative plates " feature;
Step S2, the location-weighted landscape contrast index based on minimum water unit calculate;
Step S3, the landscape indices and water quality index system construction, for building comprehensive and low redundancy scape
See index number system and water quality index system;
Step S4, the landscape indices choose module and landscape indices and water quality index relationship with water quality index
Research;
Further, step S1 includes:
(1) remote sensing image " collection of illustrative plates " feature extraction, carries for the shape to high spatial resolution satellite image, textural characteristics
It takes and the spectral band information extraction of centering resolution multi-spectral satellite image works;
(2) fusion " collection of illustrative plates " feature landscape types extraction, for according to the distinctive shape of different landscape, texture information with
And landscape source remittance type information is extracted in turn to distinguish in the variation of different-waveband reflectivity;
Further, step S2 includes:
(1) minimum Hydrologic response units divide, the minimum Research scale calculated for division index;
(2) source remittance landscape types amendment and geographic influence factor correction, pass for weighing Non-point Source Pollutants in basin
By the influence degree of geographic factor when defeated;
(3) location-weighted landscape contrast index calculation formula is expressed as:
HRULCIi=Wi*Ai
Wherein, i indicates that a certain specific HRU, Ai indicate that the area of the HRU, Wi indicate productions of the HRU to Non-point Source Pollutants
Life/rejection coefficient, Wi are influenced by Land-Use, soil property, precipitation and applying quantity of chemical fertilizer etc., consider non-point source
Pollutant need to be modified different geographic factors, Wi is represented by by the process of HRU generations/decay and eventually enter into water body:
Wi=F (L, P, R, D, N, S, F, A)
Wherein, L represents land use pattern correction factor, and P represents gradient correction factor, and R represents average annual precipitation amendment
Coefficient, D represent distance factor correction factor, and N represents NDVI correction factors, and S represents soil texture correction factor, and F represents chemical fertilizer
Using quantity correction coefficient, A represents the correction factor of Effective Soil Water Content.
Meanwhile to allow the space load correlation index between different HRU to compare, the dirt to different landscape source remittance type
Dye object correction factor is standardized, i.e.,:
Wherein Wi is the Non-point Source Pollutants correction factor of certain land use landscape, and WMAX refers to soil in valley sight
Utilize the maximum value of Non-point Source Pollutants correction factor under landscape.If Non-point Source Pollutants there are many in HRU,:
HRULCIXY=HRULCIX+HRULCIY
Wherein, HRULCIY is landscape load factors of the Non-point Source Pollutants Y in HRU, and HRULCIXY is pollutant X and Y
Landscape load factor summation in HRU.
For sub-basin, the calculating of non-point pollution landscape load factor is expressed as:
Wherein N represents landscape types in sub-basin as the HRU total numbers of source landscape, and i represents HRU.
Further, step S4 includes:
(1) multi-space Research scale selects, for according to research area source remittance landscape and hydrology period feature, selection to have generation
The time scale (vegetation key phenological period) of table and space scale (Watershed Scale, catchment scale, buffering area scale) conduct
The Research scale of relationship research;
(2) landscape indices system and hydrology index body relationship analysis, for being studied between the two under multiple space and time scales
Correlativity.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
With within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention god.
Claims (5)
1. a kind of multiple dimensioned landscape pattern in basin based on remote sensing technology and water quality index relationship research method, including fusion " figure
Converge pattern information extraction modules, the location-weighted landscape contrast index based on minimum water unit in the valley sight source of spectrum " feature
Computing module, landscape indices and water quality index choose module and landscape indices and water quality index relationship research module;
Wherein,
The valley sight source remittance pattern information extraction modules of described fusion " collection of illustrative plates " feature, for extraction source remittance landscape types letter
Breath;
The location-weighted landscape contrast index computing module based on minimum water unit, for calculating a kind of improved scape
See space load correlation index;
The landscape indices choose module with water quality index and choose comprehensive and independent index and index system for establishing;
The landscape indices are with water quality index relationship research module for studying landscape pattern and water under multi-space angle
Correlativity between matter index.
2. the multiple dimensioned landscape pattern in the basin according to claim 1 based on remote sensing image data grinds with water quality index relationship
Study carefully method, the valley sight source remittance pattern information extraction modules of described fusion " collection of illustrative plates " feature specifically include:
Remote sensing image " collection of illustrative plates " feature extraction unit, for shape, the texture feature extraction to high spatial resolution satellite image
And the spectral band information extraction work of centering resolution multi-spectral satellite image;
Merge " collection of illustrative plates " feature landscape types extraction unit, for according to the distinctive shape of different landscape, texture information and
It is distinguished in the variation of different-waveband reflectivity and then extracts landscape source remittance type information.
3. the multiple dimensioned landscape pattern in the basin according to claim 1 based on remote sensing image data grinds with water quality index relationship
Study carefully method, the location-weighted landscape contrast index computing module based on minimum water unit specifically includes:
Minimum Hydrologic response units division unit, the minimum Research scale calculated for division index;
Converge landscape types amendment and geographic influence factor correction unit in source, when being transmitted in basin for weighing Non-point Source Pollutants
By the influence degree of geographic factor.
4. the multiple dimensioned landscape pattern in the basin according to claim 1 based on remote sensing image data grinds with water quality index relationship
Study carefully method, the landscape indices are chosen module with water quality index and specifically included:
Key index system construction unit, for building comprehensive and low redundancy landscape index system and water quality index system.
5. the multiple dimensioned landscape pattern in the basin according to claim 1 based on remote sensing image data grinds with water quality index relationship
Study carefully method, the landscape indices choose module and landscape indices and water quality index relationship research module with water quality index
Including:
Multi-space Research scale selecting unit is represented for according to research area source remittance landscape and hydrology period feature, selecting to have
Property time scale (vegetation key phenological period) and space scale (Watershed Scale, catchment scale, buffering area scale) as pass
It is the Research scale of research;
Landscape indices system and hydrology index body relationship analysis unit, for studying phase between the two under multiple space and time scales
Pass relationship.
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CN112990684A (en) * | 2021-03-09 | 2021-06-18 | 中国科学院城市环境研究所 | Method and system for determining accessibility of green land to ecological effect of building energy consumption carbon emission reduction |
CN112990661A (en) * | 2021-02-07 | 2021-06-18 | 华中农业大学 | Small watershed ecological space health assessment system and method |
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Cited By (5)
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CN111898896A (en) * | 2020-07-24 | 2020-11-06 | 中国科学院城市环境研究所 | Watershed non-point source pollution loss intensity evaluation method considering soil attributes |
CN112990661A (en) * | 2021-02-07 | 2021-06-18 | 华中农业大学 | Small watershed ecological space health assessment system and method |
CN112990661B (en) * | 2021-02-07 | 2023-04-07 | 华中农业大学 | Small watershed ecological space health assessment system and method |
CN112990684A (en) * | 2021-03-09 | 2021-06-18 | 中国科学院城市环境研究所 | Method and system for determining accessibility of green land to ecological effect of building energy consumption carbon emission reduction |
CN112990684B (en) * | 2021-03-09 | 2022-09-13 | 中国科学院城市环境研究所 | Method and system for determining accessibility of green land to ecological effect of building energy consumption carbon emission reduction |
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