CN105806754B - Detect the method and device of the PM2.5 mass in sheet forest land - Google Patents
Detect the method and device of the PM2.5 mass in sheet forest land Download PDFInfo
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- CN105806754B CN105806754B CN201410855688.1A CN201410855688A CN105806754B CN 105806754 B CN105806754 B CN 105806754B CN 201410855688 A CN201410855688 A CN 201410855688A CN 105806754 B CN105806754 B CN 105806754B
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Abstract
The present invention discloses a kind of method and device detecting the PM2.5 mass in sheet forest land, can calculate the PM2.5 mass in sheet forest land.The method includes：A vertical section and several cross sections are chosen in sheet forest land to be detected；For every side of vertical section, the mean concentration of the PM2.5 on several cross sections described in the side is determined, and determine the expression formula of the mean concentration of PM2.5 on the cross section in several cross sections described in the side between the adjacent cross section of each two；For every side of vertical section, the PM2.5 mass between two adjacent cross sections is determined according to the mean concentration of the PM2.5 on the cross section between the adjacent cross section of each two in several cross sections of the side；For every side of vertical section, the PM2.5 mass between adjacent cross section in several cross sections of the side is summed, determine forest land the side PM2.5 mass；PM2.5 mass by forest land in vertical section both sides is summed, and determines the PM2.5 mass in forest land.
Description
Technical field
The present invention relates to environmental monitoring technology fields, and in particular to a kind of side for detecting the PM2.5 mass in sheet forest land
Method and device.
Background technology
PM2.5 is a kind of major pollutants of current atmospheric pollution, and PM2.5 is easily inhaled human body, and is directly entered branch
Tracheae interferes the gas exchanges of lung, is damaged to respiratory system and cardiovascular system, causes asthma, bronchitis and the heart
The disease of angiosis etc., seriously affects human health.
The concentration of PM2.5 in air can be effectively reduced by afforestation, this is because trees can be by covering ground
Table reduces the sources PM2.5, and PM2.5 is adsorbed by blade face, branch surface, stem, PM2.5 can also be promoted heavy by reducing wind speed
Drop changes wind direction obstruction PM2.5 and enters the approach such as regional area removal PM2.5, to reduce the concentration of PM2.5 in air.
Thus, if it is possible to the PM2.5 mass in sheet forest land is calculated, then can be to be reduced for City woods
PM2.5 concentration provides foundation.But the PM2.5 mass in sheet forest land can be but calculated without effective means now.
Invention content
The PM2.5 matter in sheet forest land cannot be effectively calculated the technical problem to be solved by the present invention is to the prior art
The problem of amount.
For this purpose, the present invention proposes a kind of method detecting the PM2.5 mass in sheet forest land, including：
A vertical section and several cross sections are chosen in sheet forest land to be detected；
For every side of the vertical section, the mean concentration of the PM2.5 on several cross sections described in the side is determined,
And it is determined every two in several cross sections described in the side according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section between a adjacent cross section；
For every side of the vertical section, according between the adjacent cross section of each two in several cross sections described in the side
Cross section on the expression formula of mean concentration of PM2.5 determine the PM2.5 mass between two adjacent cross sections；
For every side of the vertical section, by the PM2.5 between adjacent cross section in several cross sections described in the side
Quality is summed, determine the forest land the side PM2.5 mass；
PM2.5 mass by the forest land in the vertical section both sides is summed, and determines the PM2.5 in the forest land
Quality.
The method that the embodiment of the present invention detects the PM2.5 mass in sheet forest land, first, in sheet forest land to be detected
It chooses a vertical section and several cross sections determines that several are cross-section described in the side for every side of the vertical section
The mean concentration of PM2.5 on face, and the side is determined according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section in several described cross sections between the adjacent cross section of each two, so
Afterwards, for every side of the vertical section, according to the cross between the adjacent cross section of each two in several cross sections described in the side
The expression formula of the mean concentration of PM2.5 on section determines the PM2.5 mass between two adjacent cross sections, next, right
In every side of the vertical section, the PM2.5 mass between adjacent cross section in several cross sections described in the side is asked
With, determine the forest land the side PM2.5 mass, finally, the PM2.5 mass by the forest land in the vertical section both sides
It sums, determines the PM2.5 mass in the forest land, can effectively calculate the PM2.5 mass in sheet forest land.
On the other hand, the present invention proposes a kind of device detecting the PM2.5 mass in sheet forest land, including：
Selection unit, for choosing a vertical section and several cross sections in sheet forest land to be detected；
First determination unit is determined for every side for the vertical section on several cross sections described in the side
PM2.5 mean concentration, and determined described in the side according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section in several cross sections between the adjacent cross section of each two；
Second determination unit, for every side for the vertical section, according to every in several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section between two adjacent cross sections determines between two adjacent cross sections
PM2.5 mass；
Third determination unit will be adjacent in several cross sections described in the side for every side for the vertical section
PM2.5 mass between cross section is summed, determine the forest land the side PM2.5 mass；
4th determination unit is summed for the PM2.5 mass by the forest land in the vertical section both sides, is determined
PM2.5 mass in the forest land.
The embodiment of the present invention detects the device of the PM2.5 mass in sheet forest land, first, in sheet forest land to be detected
It chooses a vertical section and several cross sections determines that several are cross-section described in the side for every side of the vertical section
The mean concentration of PM2.5 on face, and the side is determined according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section in several described cross sections between the adjacent cross section of each two, so
Afterwards, for every side of the vertical section, according to the cross between the adjacent cross section of each two in several cross sections described in the side
The expression formula of the mean concentration of PM2.5 on section determines the PM2.5 mass between two adjacent cross sections, next, right
In every side of the vertical section, the PM2.5 mass between adjacent cross section in several cross sections described in the side is asked
With, determine the forest land the side PM2.5 mass, finally, the PM2.5 mass by the forest land in the vertical section both sides
It sums, determines the PM2.5 mass in the forest land, can effectively calculate the PM2.5 mass in sheet forest land.
Description of the drawings
Fig. 1 show a kind of flow diagram for one embodiment of method detecting the PM2.5 mass in sheet forest land；
Fig. 2 is the flow diagram of mono- embodiments of S2 in Fig. 1；
Fig. 3 is a kind of frame structure schematic diagram for one embodiment of device detecting the PM2.5 mass in sheet forest land；
Fig. 4 is the frame structure schematic diagram of one embodiment of the first determination unit in Fig. 3.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical solution in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
As shown in Figure 1, the present embodiment discloses a kind of method detecting the PM2.5 mass in sheet forest land, including：
S1, a vertical section and several cross sections are chosen in sheet forest land to be detected；
S2, every side for the vertical section determine that the PM2.5's on several cross sections described in the side is average dense
Degree, and determined in several cross sections described in the side according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section between the adjacent cross section of each two；Wherein, the expression formula is by corresponding
Cross section and decision at a distance from a cross section in two adjacent cross sections；
S3, every side for the vertical section, according to the adjacent cross section of each two in several cross sections described in the side
Between cross section on the expression formula of mean concentration of PM2.5 determine the PM2.5 mass between two adjacent cross sections；
S4, every side for the vertical section, will be between adjacent cross section in several cross sections described in the side
PM2.5 mass is summed, determine the forest land the side PM2.5 mass；
S5, the PM2.5 mass by the forest land in the vertical section both sides are summed, and are determined in the forest land
PM2.5 mass.
The method that the embodiment of the present invention detects the PM2.5 mass in sheet forest land, first, in sheet forest land to be detected
It chooses a vertical section and several cross sections determines that several are cross-section described in the side for every side of the vertical section
The mean concentration of PM2.5 on face, and the side is determined according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section in several described cross sections between the adjacent cross section of each two, so
Afterwards, for every side of the vertical section, according to the cross between the adjacent cross section of each two in several cross sections described in the side
The expression formula of the mean concentration of PM2.5 on section determines the PM2.5 mass between two adjacent cross sections, next, right
In every side of the vertical section, the PM2.5 mass between adjacent cross section in several cross sections described in the side is asked
With, determine the forest land the side PM2.5 mass, finally, the PM2.5 mass by the forest land in the vertical section both sides
It sums, determines the PM2.5 mass in the forest land, can effectively calculate the PM2.5 mass in sheet forest land.
Optionally, referring to Fig. 2, in another embodiment that the method for the PM2.5 mass in sheet forest land is detected in the present invention,
The mean concentration (S2) for determining the PM2.5 on several cross sections described in the side, including：
S20, for each cross section in several cross sections described in the side, according to the length in the cross section and the cross
The PM2.5 concentration observation points of vegetation pattern setting preset quantity on forest land corresponding to section；
S21, the PM2.5 concentration f that any point on the cross section is determined according to the PM2.5 concentration of the observation point with
Relational expression f (x)=ax of the point to the distance x of the vertical section2+bx+c；Wherein, described a, b and c are the relational expression f (x)
Coefficient；
S22, the mean concentration for carrying out the PM2.5 that integral is determined on the cross section to f (x)/l on 0 to l section；
Wherein, the l is the width in the cross section.
In the embodiment of the present invention, it is assumed that the quantity in several cross sections of selection is 4, with vertical section unilateral side cross section A, cross
For section B, cross section C and D4, cross section cross section, it is assumed that the observation chosen on each cross section in 4 cross sections
Point is 3, and is an intersection point in cross section and vertical section, in the middle part of cross section apart from vertical section distance is cross section width
Half a bit, cross section Edge Distance vertical section distance be cross section width a bit.Observation point on this 4 cross sections
PM2.5 concentration is as shown in the table：
Following table is the PM2.5 concentration of sheet forest land cross section observation point
| A | B | C | D | |
| The positions PM2.5 | The positions PM2.5 | The positions PM2.5 | The positions PM2.5 | |
| Vertical section | 78.450 | 65.430 | 65.60 | 77.820 |
| In the middle part of cross section | 78.450 | 74.3223 | 74.8226 | 77.820 |
| Cross section edge | 78.450 | 80.6846 | 81.2852 | 77.820 |
The unit of PM2.5 concentration is microgram/cubic meter in upper table, and position is distance of the observation point apart from vertical section, unit
For rice.
Illustrate by taking the calculating of the mean concentration of the PM2.5 on cross section A and cross section B as an example on several cross sections
The computational methods of the mean concentration of PM2.5.It is apparent from the mean concentration p of the PM2.5 on the A of cross sectiona=78.45 micrograms/cubic meter.
The PM2.5 concentration f at any point on the B of cross section can be established according to the PM2.5 concentration of three observation points on the B of cross section and is somebody's turn to do
Relational expression f (x)=(- 0.0024) * x of the point to the distance x of vertical section2+ 0.4415*x+65.43, and the width of cross section B is
46 meters, thus in accordance with formula pb=
It can determine that being averaged for the PM2.5 on the B of cross section
Concentration pb=73.89 micrograms/cubic meter.
Optionally, in another embodiment of the method for the PM2.5 mass in present invention detection sheet forest land, the basis
The mean concentration of PM2.5 on several cross sections described in the side determines that each two is adjacent in several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section between cross section, including：
For any two in several cross sections described in the side adjacent cross section A and B, the cross section A and B is established
Between arbitrary cross section width g and the distance between the arbitrary cross section and the cross section A z relational expression g (z)=
dz2+ ez+t is established between the mean concentration h of the PM2.5 on the arbitrary cross section and the arbitrary cross section and the cross section A
Distance z relational expression h (z)=pa+(pb-pa)*z/m；Wherein, described d, e and t are the coefficient of the relational expression g (z), described
paFor the mean concentration of the PM2.5 on the cross section A, the pbIt is described for the mean concentration of the PM2.5 on the cross section B
M is the distance between the cross section B and the cross section A.
In the embodiment of the present invention, still by taking the citing in previous embodiment as an example.With appointing between cross section A and cross section B
Several cross sections described in illustrating vertical section per side for the calculating of the expression formula of the mean concentration of PM2.5 on meaning cross section
The computational methods of the expression formula of the mean concentration of the PM2.5 on cross section between the adjacent cross section of middle each two.According to upper table
In data easily establish the width g in the arbitrary cross section between cross section A and B, with the arbitrary cross section and the cross section A it
Between distance z relational expression g (z)=0.0122z2+ 0.0365z, it is possible thereby to establish the flat of the PM2.5 on the arbitrary cross section
Equal concentration h, relational expression h (z)=78.45+ (73.89- with the distance between the arbitrary cross section and the cross section A z
78.45) * z/60=78.45-4.56*z/60.
Optionally, in another embodiment of the method for the PM2.5 mass in present invention detection sheet forest land, the basis
The expression formula of the mean concentration of the PM2.5 on cross section in several cross sections described in the side between the adjacent cross section of each two
Determine the PM2.5 mass between two adjacent cross sections, including：
For any two in several cross sections described in the side adjacent cross section A and B, on 0 to the section of the m
N*g (z) * h (z) are integrated, the PM2.5 mass between the cross section A and B is calculated；Wherein, the n is the cross
The mean stand height in forest land between section A and B.
In the embodiment of the present invention, still by taking the citing in previous embodiment as an example.With between cross section A and cross section B
In several cross sections described in illustrating vertical section per side for the calculating of PM2.5 mass between the adjacent cross section of each two
PM2.5 mass.Assuming that the mean stand height in forest land is 12.5 meters between cross section A and B, then to 12.5*g on 0 to 60 section
(z) * h (z) are integrated, as a result the PM2.5 mass between as cross section A and cross section B.
It can similarly calculate in several cross sections described in the every side of vertical section between the adjacent cross section of each two
PM2.5 mass sums the PM2.5 mass between the adjacent cross section in calculated vertical section both sides, as a result as forest land
Interior PM2.5 mass.
Optionally, in another embodiment of the method for the PM2.5 mass in present invention detection sheet forest land, the selection
Cross section quantity be more than 3.
As shown in figure 3, the present embodiment discloses a kind of device detecting the PM2.5 mass in sheet forest land, including：
Selection unit 1, for choosing a vertical section and several cross sections in sheet forest land to be detected；
First determination unit 2 is determined for every side for the vertical section on several cross sections described in the side
PM2.5 mean concentration, and determined described in the side according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section in several cross sections between the adjacent cross section of each two；Wherein, should
Expression formula by corresponding cross section with determined at a distance from a cross section in two adjacent cross sections；
Second determination unit 3, for every side for the vertical section, according to every in several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section between two adjacent cross sections determines between two adjacent cross sections
PM2.5 mass；
Third determination unit 4 will be adjacent in several cross sections described in the side for every side for the vertical section
PM2.5 mass between cross section is summed, determine the forest land the side PM2.5 mass；
4th determination unit 5 is summed for the PM2.5 mass by the forest land in the vertical section both sides, is determined
Go out the PM2.5 mass in the forest land.
The embodiment of the present invention detects the device of the PM2.5 mass in sheet forest land, first, in sheet forest land to be detected
It chooses a vertical section and several cross sections determines that several are cross-section described in the side for every side of the vertical section
The mean concentration of PM2.5 on face, and the side is determined according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section in several described cross sections between the adjacent cross section of each two, so
Afterwards, for every side of the vertical section, according to the cross between the adjacent cross section of each two in several cross sections described in the side
The expression formula of the mean concentration of PM2.5 on section determines the PM2.5 mass between two adjacent cross sections, next, right
In every side of the vertical section, the PM2.5 mass between adjacent cross section in several cross sections described in the side is asked
With, determine the forest land the side PM2.5 mass, finally, the PM2.5 mass by the forest land in the vertical section both sides
It sums, determines the PM2.5 mass in the forest land, can effectively calculate the PM2.5 mass in sheet forest land.
Optionally, referring to Fig. 4, in another embodiment that the device of the PM2.5 mass in sheet forest land is detected in the present invention,
First determination unit 2, including：
Subelement 20 is arranged in observation point, for for each cross section in several cross sections described in the side, according to
The PM2.5 concentration observation points of vegetation pattern setting preset quantity on forest land corresponding to the length in the cross section and the cross section；
First determination subelement 21, it is arbitrary on the cross section for being determined according to the PM2.5 concentration of the observation point
The PM2.5 concentration f of any and the point to relational expression f (x)=ax of the vertical section distance x2+bx+c；Wherein, described a, b
With the coefficient that c is the relational expression f (x)；
Second determination subelement 22 is determined for carrying out integral to f (x)/l on 0 to l section on the cross section
The mean concentration of PM2.5；Wherein, the l is the width in the cross section.
Optionally, in another embodiment of the device of the PM2.5 mass in present invention detection sheet forest land, described first
Determination unit, for for any two in several cross sections described in the side adjacent cross section A and B, establishing described cross-section
The relational expression g of the width g in the arbitrary cross section between face A and B and the distance between the arbitrary cross section and the cross section A z
(z)=dz2+ ez+t establishes the mean concentration h and the arbitrary cross section and the cross section A of the PM2.5 on the arbitrary cross section
The distance between z relational expression h (z)=pa+(pb-pa)*z/m；Wherein, described d, e and t are the coefficient of the relational expression g (z),
The paFor the mean concentration of the PM2.5 on the cross section A, the pbFor the mean concentration of the PM2.5 on the cross section B,
The m is the distance between the cross section B and the cross section A.
Optionally, in another embodiment of the device of the PM2.5 mass in present invention detection sheet forest land, described second
Determination unit, for for any two in several cross sections described in the side adjacent cross section A and B, arriving the m's 0
N*g (z) * h (z) are integrated on section, calculate the PM2.5 mass between the cross section A and B；Wherein, the n is
The mean stand height in forest land between the cross section A and B.
Optionally, in another embodiment of the device of the PM2.5 mass in present invention detection sheet forest land, the selection
Cross section quantity be more than 3.
Although the embodiments of the invention are described in conjunction with the attached drawings, but those skilled in the art can not depart from this hair
Various modifications and variations are made in the case of bright spirit and scope, such modifications and variations are each fallen within by appended claims
Within limited range.
Claims (10)
1. a kind of method of PM2.5 mass in detection sheet forest land, which is characterized in that including：
A vertical section and several cross sections are chosen in sheet forest land to be detected；
For every side of the vertical section, the mean concentration of the PM2.5 on several cross sections described in the side, and root are determined
Each two phase in several cross sections described in the side is determined according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section between adjacent cross section；
For every side of the vertical section, according to the cross between the adjacent cross section of each two in several cross sections described in the side
The expression formula of the mean concentration of PM2.5 on section determines the PM2.5 mass between two adjacent cross sections；
For every side of the vertical section, by the PM2.5 mass between adjacent cross section in several cross sections described in the side
Sum, determine the forest land the side PM2.5 mass；
PM2.5 mass by the forest land in the vertical section both sides is summed, and determines the PM2.5 matter in the forest land
Amount.
2. the method for PM2.5 mass in detection sheet forest land according to claim 1, which is characterized in that described to determine
The mean concentration of PM2.5 on several cross sections described in the side, including：
It is right according to the length in the cross section and the cross section for each cross section in several cross sections described in the side
Answer the vegetation pattern on forest land that the PM2.5 concentration observation points of preset quantity are set；
The PM2.5 concentration f and the point to institute at any point on the cross section are determined according to the PM2.5 concentration of the observation point
State relational expression f (x)=ax of the distance x of vertical section2+bx+c；Wherein, described a, b and c are the coefficient of the relational expression f (x)；
The mean concentration for the PM2.5 that integral is determined on the cross section is carried out to f (x)/l on 0 to l section；Wherein, described
L is the width in the cross section.
3. the method for PM2.5 mass in detection sheet forest land according to claim 1 or 2, which is characterized in that the basis
The mean concentration of PM2.5 on several cross sections described in the side determines that each two is adjacent in several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section between cross section, including：
For any two in several cross sections described in the side adjacent cross section A and B, establish between the cross section A and B
Arbitrary cross section width g and the distance between the arbitrary cross section and the cross section A z relational expression g (z)=dz2+ez
+ t establishes the mean concentration h and the distance between the arbitrary cross section and the cross section A z of the PM2.5 on the arbitrary cross section
Relational expression h (z)=pa+(pb-pa)*z/m；Wherein, described d, e and t are the coefficient of the relational expression g (z), the paFor institute
State the mean concentration of the PM2.5 on the A of cross section, the pbFor the mean concentration of the PM2.5 on the cross section B, the m is institute
State the distance between cross section B and the cross section A.
4. the method for PM2.5 mass in detection sheet forest land according to claim 3, which is characterized in that the basis should
The expression formula of the mean concentration of the PM2.5 on cross section in several cross sections described in side between the adjacent cross section of each two is true
PM2.5 mass between fixed two adjacent cross sections, including：
For any two in several cross sections described in the side adjacent cross section A and B, to n* on 0 to the section of the m
G (z) * h (z) are integrated, and the PM2.5 mass between the cross section A and B is calculated；Wherein, the n is the cross section A
The mean stand height in forest land between B.
5. the method for PM2.5 mass in detection sheet forest land according to claim 1, which is characterized in that the selection
The quantity in cross section is more than 3.
6. a kind of device of the PM2.5 mass in detection sheet forest land, which is characterized in that including：
Selection unit, for choosing a vertical section and several cross sections in sheet forest land to be detected；
First determination unit is determined for every side for the vertical section on several cross sections described in the side
The mean concentration of PM2.5, and if being determined described in the side according to the mean concentration of the PM2.5 on several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section in dry cross section between the adjacent cross section of each two；
Second determination unit, for every side for the vertical section, according to each two in several cross sections described in the side
The expression formula of the mean concentration of the PM2.5 on cross section between adjacent cross section determines between two adjacent cross sections
PM2.5 mass；
Third determination unit will be adjacent cross-section in several cross sections described in the side for every side for the vertical section
PM2.5 mass between face is summed, determine the forest land the side PM2.5 mass；
4th determination unit is summed for the PM2.5 mass by the forest land in the vertical section both sides, is determined described
PM2.5 mass in forest land.
7. the device of PM2.5 mass in detection sheet forest land according to claim 6, which is characterized in that described first really
Order member, including：
Subelement is arranged in observation point, is used for for each cross section in several cross sections described in the side, cross-section according to this
The PM2.5 concentration observation points of vegetation pattern setting preset quantity on forest land corresponding to the length in face and the cross section；
First determination subelement, for determining any point on the cross section according to the PM2.5 concentration of the observation point
PM2.5 concentration f and the point to relational expression f (x)=ax of the vertical section distance x2+bx+c；Wherein, described a, b and c are institute
State the coefficient of relational expression f (x)；
Second determination subelement integrates the PM2.5 determined on the cross section for being carried out to f (x)/l on 0 to l section
Mean concentration；Wherein, the l is the width in the cross section.
8. the device of PM2.5 mass in the detection sheet forest land described according to claim 6 or 7, which is characterized in that described first
Determination unit, for for any two in several cross sections described in the side adjacent cross section A and B, establishing described cross-section
The relational expression g of the width g in the arbitrary cross section between face A and B and the distance between the arbitrary cross section and the cross section A z
(z)=dz2+ ez+t establishes the mean concentration h and the arbitrary cross section and the cross section A of the PM2.5 on the arbitrary cross section
The distance between z relational expression h (z)=pa+(pb-pa)*z/m；Wherein, described d, e and t are the coefficient of the relational expression g (z),
The paFor the mean concentration of the PM2.5 on the cross section A, the pbFor the mean concentration of the PM2.5 on the cross section B,
The m is the distance between the cross section B and the cross section A.
9. the device of PM2.5 mass in detection sheet forest land according to claim 8, which is characterized in that described second really
Order member is used for for any two in several cross sections described in the side adjacent cross section A and B, in the area that 0 arrives the m
Between on n*g (z) * h (z) are integrated, calculate the PM2.5 mass between the cross section A and B；Wherein, the n is institute
State the mean stand height in forest land between cross section A and B.
10. the device of PM2.5 mass in detection sheet forest land according to claim 6, which is characterized in that the selection
The quantity in cross section is more than 3.
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| CN110487689B (en) * | 2018-05-14 | 2022-02-18 | 扬州大学 | Method for measuring, calculating and comparing relative average concentration of dust particles in similar areas in city |
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