CN114965883A - Method for judging main atmospheric pollutants and main atmospheric pollution sources in area - Google Patents
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Abstract
The invention discloses a method for judging main atmospheric pollutants and main atmospheric pollution sources in an area, which comprises the following steps: defining a population concentration area; determining the distance from each pollution source to each population concentration area by combining the regional map; determining the wind direction of a population concentration area relatively nearest to each pollution source by combining the perennial dominant wind directions of the areas; calculating the environmental pollution index of each pollutant in each pollution source; respectively solving the pollution index ratio of each pollutant and each pollution source in the area; screening out main atmospheric pollutants in the area by sequencing the pollution index ratio of each pollutant; and (4) sorting the pollution index ratio of each pollution source to screen out the main atmospheric pollution sources in the area. The method can reasonably determine the main atmospheric pollutants and the main atmospheric pollution sources in the area, and is beneficial to environmental protection departments to make scientific and reasonable treatment decisions, so that the treated objects are more definite and the treatment intensity is more reasonable.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a method for judging main atmospheric pollutants and main atmospheric pollution sources in an area.
Background
For pollution control, besides reasonably planning layout and strictly controlling pollution emission of new construction, reconstruction and extension projects, another important approach is to make a pollution emission reduction plan for the existing projects, and especially to make a treatment and emission reduction scheme for key pollutants and key pollution sources in an area. Therefore, it is important to determine the important pollutants and the important pollution sources of the area by a scientific and reasonable method. Since atmospheric pollutants have the characteristic of moving with wind, the determination of the important pollutants and the important pollution sources in an area should not be simply determined by the discharge amount and the discharge concentration of the pollutants, and is also related to the geographical position (such as the relative wind direction and the relative position of the air pollution sources and a population concentration area) where the air pollution sources are located. Under the same condition, if the pollution source is positioned in the upwind direction of the population concentration area, the influence of the pollution source on the population concentration area is larger than that in the downwind direction and the crosswind direction; under the same condition, if the pollution source is close to the population concentration area, the influence of the pollution source on the population concentration area is larger at a longer distance, and the two points are different from the atmospheric pollution and the soil pollution.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the method for judging the main atmospheric pollutants and the main atmospheric pollution sources in the area is provided, the main atmospheric pollutants and the main atmospheric pollution sources in the area can be reasonably determined, and the method is beneficial to environmental protection departments to make scientific and reasonable treatment decisions, so that the treatment objects are clearer and the treatment strength is more reasonable.
The technical scheme is as follows: in order to achieve the purpose, the invention provides a method for judging main atmospheric pollutants and main atmospheric pollution sources in an area, which comprises the following steps:
s1: defining a population concentration area;
s2: determining the distance from each pollution source to each population concentration area by combining the regional map; determining the wind direction of a population concentration area relatively nearest to each pollution source by combining the perennial dominant wind directions of the areas;
s3: calculating the environmental pollution index of each pollutant in each pollution source;
s4: respectively solving the pollution index ratio of each pollutant and each pollution source in the area;
s5: screening out main atmospheric pollutants in the area by sequencing the pollution index ratio of each pollutant; and (4) sorting the pollution index ratio of each pollution source to screen out the main atmospheric pollution sources in the area.
Further, the method for defining the mouth concentration area in step S1 includes: areas with dense population such as scientific research, culture and education, residences, businesses and the like are drawn out on a map by using outlines, the number of population concentration areas is determined according to specific conditions and is generally not too large, when the number of the defined population concentration areas is large and dispersed, the defined population concentration areas can be combined nearby, the population concentration areas with small scale can be ignored, the number of the suggested population concentration areas is controlled within 5, and z population concentration areas defined in a certain area are set.
Further, the method for determining the distance from each pollution source to each population concentration area in step S2 is as follows: measuring the distance l between each pollution source and each population concentration area by using a distance tool in combination with a regional map ik (km, i.e. the distance of the ith contamination source from the kth person's oral concentration zone, i ═ 1, 2, 3, … n; k ═ 1, 2, 3, … z).
Further, the method for determining the wind direction of each pollution source in the relatively nearest population concentration area in step S2 is as follows: determining the wind direction of each pollution source relative to each population concentration area by combining the perennial dominant wind directions of the areas, wherein the wind directions comprise an upwind direction, a downwind direction and a lateral wind direction, and if the pollution sources are positioned in the upwind direction of the population concentration area, giving a weight of 1; the pollution source is positioned in the downwind direction of the population concentration area, and the weight is given to be 0.1; the pollution source is positioned in the wind direction at the side of the population concentration area, and the weight is given to 0.5; weight w ik The wind direction weight of the ith pollution source relative to the kth person mouth concentration region.
Further, the method for obtaining the environmental pollution index of each pollutant in each pollution source in step S3 includes:
in the formula: i.e. i＝1，2，3，…n；j＝1，2，3，…m；k＝1，2，3，…z；L ij The environmental pollution index (m) of the jth pollutant in the ith pollution source 3 /a)；C ij Is the average emission concentration (mg/m) of the pollutant 3 )；C 0ij Is the environmental quality standard (mg/m) of the pollutant in the local environment 3 )；E i Is the unit time emission (m) of the pollution source 3 /a)。
Further, the method for acquiring the pollution index ratio of each pollution source in the area in the step S4 is as follows:
total pollution index L of ith pollution source i ：
Further, the method for acquiring the ratio of the pollution indexes of each pollutant in the area in the step S4 is as follows:
total pollution index L of j-th pollutant j ：
Further, the method for determining the main atmospheric pollutants and the main atmospheric pollution sources in the area in step S5 is as follows: according to the pollution index ratio L of the pollutants in the area j The accumulated percentage is calculated, and the pollutants with the accumulated percentage larger than a set value are listed as main atmospheric pollutants in the area; pollution index ratio L in area according to pollution source i The magnitude of the pollution is sorted, the cumulative percentage is calculated, and the pollution source with the cumulative percentage larger than the set value is listed as the main atmospheric pollution source of the area.
Has the advantages that: compared with the prior art, the method can more reasonably determine the main atmospheric pollutants and the main atmospheric pollution source in the area, can provide decision support for the emission reduction and the pollutant treatment of the atmospheric pollution in the area, and avoids the blindness of experience decision, thereby achieving the purpose of improving the air quality of the area environment.
Drawings
FIG. 1 is a schematic flow diagram of the process of the present invention;
fig. 2 is a schematic diagram of the distribution of pollution sources and population concentration areas in this embodiment.
Detailed Description
The present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
The invention provides a method for judging main atmospheric pollutants and main atmospheric pollution sources in an area, which comprises the following steps as shown in figure 1:
s1: the method comprises the following steps of (1) defining human mouth concentration areas such as regional residence, cultural and educational:
the map is drawn by outline lines in the areas with dense population such as scientific research, culture, residence, business and the like. The number of population concentration areas is determined according to specific situations, and is generally not suitable to be too large. When the number of the defined population concentration areas is large and scattered, the defined population concentration areas can be combined nearby, the population concentration areas with small sizes can be ignored, and the number of the suggested population concentration areas is controlled within 5. Here, z population concentration areas defined by a certain area are set.
S2: and (3) judging the distance of each pollution source from each population concentration area by combining the regional map:
measuring the distance l between each pollution source and each population concentration area by using a distance tool in combination with a regional map ik (km, i.e. the distance of the ith contamination source from the kth person's oral concentration zone, i ═ 1, 2, 3, … n; k ═ 1, 2, 3, … z).
S3: and (3) judging the wind direction of each pollution source relative to the nearest population concentration area by combining the perennial dominant wind directions of the areas:
if the pollution source is located in the wind direction of the population concentration area, the weight is given 1; the pollution source is positioned in the downwind direction of the population concentration area, and the weight is given to be 0.1; the pollution source is positioned in the wind direction at the side of the population concentration area, and the weight is given to 0.5; weight ofw ik The wind direction weight of the ith pollution source relative to the kth person mouth concentration area.
S4: and (3) solving an environmental pollution index of each pollutant in each pollution source:
environmental pollution index (L) of jth pollutant in ith pollution source in area ij ) Is defined as:
in the formula: 1, 2, 3, … n; j ═ 1, 2, 3, … m; k is 1, 2, 3, … z; l is a radical of an alcohol ij The environmental pollution index (m) of the jth pollutant in the ith pollution source 3 /a)；C ij Is the average emission concentration (mg/m) of the pollutant 3 )；C 0ij Is the environmental quality standard (mg/m) of the pollutant in the local environment 3 )；E i Is the unit time emission (m) of the pollution source 3 /a)。
S5: determining a pollution index ratio of each pollution source in the area:
total pollution index (L) of the ith pollution Source i )：
S6: calculating a pollution index ratio of each pollutant in the area:
total contamination index (L) of j-th contaminant j )：
S7: determining the main atmospheric pollutants and the main atmospheric pollution sources in the area:
in terms of the pollution index ratio (L) of the pollutants in the area j ) Sorting the sizes of the pollutants, calculating the cumulative percentage, and listing the pollutants with the cumulative percentage more than 80 percent as main atmospheric pollutants in the area; according to the source of pollutionPollution index ratio (L) in a region i ) The method comprises the steps of sorting, calculating the cumulative percentage, and listing the pollution sources with the cumulative percentage more than 80% as the main atmospheric pollution sources of the area.
Based on the above technical solution, the above technical solution is applied to the judgment of the main atmospheric pollutants and the main atmospheric pollution source in a certain area in this embodiment, and the specific process is as follows:
1) and defining a human mouth concentration area such as living, cultural and educational areas in a certain area. This area has 2 large population concentrations. The regional environmental air quality executes the secondary standard of environmental air quality standard (GB 3095-. The perennial dominant wind direction of the region is southwest wind, the distribution conditions of pollution sources and population concentration regions are shown in figure 2, and the survey data of the pollution sources are shown in table 1 below.
TABLE 1 investigation of regional pollutant emissions
| Name of pollution Source | Exhaust emission (m) 3 /a) | SO 2 (mg/m 3 ) | NO 2 (mg/m 3 ) | Smoke dust (mg/m) 3 ) |
| Pollution source 1 | 1440 wan | 500 | 350 | 90 |
| Pollution source 2 | 2000 ten thousand | 450 | 240 | 110 |
| Pollution source 3 | 3000 ten thousand | 390 | 350 | 100 |
| Pollution source 4 | 2400 ten thousand | 470 | 500 | - |
| Pollution source 5 | 1500 ten thousand | 520 | 560 | 90 |
2) The distance of each pollution source from each population concentration zone is determined. According to investigation, the relative distance l between the pollution source and the population concentration area ik See table 2.
3) The wind direction of each pollution source relative to the nearest population concentration area is determined. According to investigation, the relative wind directions of the pollution source and the population concentration area and the assigned weight w ik See table 2.
TABLE 2 relative distance and relative wind direction between pollution source and population concentration area
4) And (4) solving the environmental pollution index of each pollutant in each pollution source. Environmental pollution index (L) of jth pollutant in ith pollution source in area ij ) Calculated according to the following formula:
in the formula: 1, 2, 3, 4, 5; j is 1, 2, 3; k is 1, 2; l is ij The environmental pollution index (m) of the jth pollutant in the ith pollution source 3 /a)；C ij Is the average emission concentration (mg/m) of the atmospheric pollutants 3 ) The data are shown in Table 1; c 0ij Is the environmental quality standard (mg/m) of the atmospheric pollutant in the local environment 3 ) By consulting the second-level standard of environmental air quality Standard (GB 3095- 2 、NO 2 The daily average concentration of the smoke dust is 0.15mg/m 3 、0.08mg/m 3 、0.15 mg/m 3 ；E i The amount of exhaust gas discharged per unit time (m) of the pollution source 3 A), data are shown in table 1. L is ij The results of the calculations are shown in Table 3.
5) And (4) calculating the pollution index ratio of each pollution source in the area. Total pollution index (L) of ith pollution Source i )：
6) The ratio of the contamination indexes of each contaminant in the area is determined. Total contamination index (L) of j-th contaminant j )：
Above L i 、L j The results of the calculations are shown in Table 3.
TABLE 3 calculation and determination process of main atmospheric pollutants and main atmospheric pollution sources in area
7) The primary atmospheric pollutants and the primary source of atmospheric pollution in the area are determined. In terms of the pollution index ratio (L) of the pollutants in the area j ) Sorting the sizes of the pollutants, calculating the cumulative percentage, and listing the pollutants with the cumulative percentage more than 80 percent as main atmospheric pollutants in the area; pollution index ratio (L) in an area according to pollution source i ) The total percentage is more than 80 percent, and the pollution sources with the total percentage more than 80 percent are listed as the main atmospheric pollution sources of the area. According to the percentage calculation results in the table 3, the main atmospheric pollutant in the area is determined to be NO through sequencing comparison 2 、SO 2 The main air pollution sources in the area are a pollution source 3 and a pollution source 4.
In the future, the area is mainly focused on NO in the aspect of formulating atmospheric pollution control 2 、SO 2 The two pollutants are treated, and NO can be formulated according to the pollution sources 3 and 4 2 、SO 2 Emission reduction planning of (1).
Claims (8)
1. A method for judging main atmospheric pollutants and main atmospheric pollution sources in an area is characterized by comprising the following steps:
s1: defining a population concentration area;
s2: determining the distance from each pollution source to each population concentration area by combining the regional map; determining the wind direction of a population concentration area relatively nearest to each pollution source by combining the perennial dominant wind directions of the areas;
s3: calculating the environmental pollution index of each pollutant in each pollution source;
s4: respectively solving the pollution index ratio of each pollutant and each pollution source in the area;
s5: screening out main atmospheric pollutants in the area by sequencing the pollution index ratio of each pollutant; and (4) sorting the pollution index ratio of each pollution source to screen out the main atmospheric pollution sources in the region.
2. The method for determining main atmospheric pollutants and main atmospheric pollution sources in an area according to claim 1, wherein the method for defining the concentrated population area in the step S1 is as follows: areas with denser population are outlined on the map.
3. The method for determining the main atmospheric pollutants and the main atmospheric pollution sources in the area according to claim 1, wherein the distance from each pollution source to each population concentration area in the step S2 is determined by the following method: measuring the distance l between each pollution source and each population concentration area by using a distance tool in combination with a regional map ik 。
4. The method for judging main atmospheric pollutants and main atmospheric pollution sources in a region according to claim 1, wherein the method for judging the wind direction of the population concentration region with each pollution source relatively nearest in the step S2 is as follows: the method comprises the steps of determining the wind direction of each pollution source relative to each population concentration area by combining the perennial dominant wind direction of the area, wherein the wind direction comprises an upwind direction, a downwind direction and a lateral wind direction, and if the pollution source is located in the upwind direction of the population concentration area, giving a weight of 1; the pollution source is positioned in the downwind direction of the population concentration area, and the weight is given to be 0.1; the pollution source is positioned in the wind direction at the side of the population concentration area, and the weight is given to 0.5; weight w ik The wind direction weight of the ith pollution source relative to the kth person mouth concentration region.
5. The method for judging the main atmospheric pollutants and the main atmospheric pollution sources in the area according to claim 1, wherein the method for obtaining the environmental pollution index of each pollutant in each pollution source in the step S3 is as follows:
in the formula: 1, 2, 3, … n; j ═ 1, 2, 3, … m; k is 1, 2, 3, … z; l is ij The environmental pollution index of the jth pollutant in the ith pollution source; c ij Is the average emission concentration of the pollutants; c 0ij Is the environmental quality standard of the pollutant in the local environment; e i Is the unit time emission of pollution sources.
6. The method for judging main atmospheric pollutants and main atmospheric pollution sources in an area according to claim 5, wherein the pollution index ratio of each pollution source in the area in the step S4 is obtained by:
total pollution index L of ith pollution source i ：
7. The method for judging main atmospheric pollutants and main atmospheric pollution sources in a region according to claim 5, wherein the pollution index ratio of each pollutant in the region in the step S4 is obtained by:
total pollution index L of j-th pollutant j ：
8. The method of claim 1, wherein the method comprises determining the prevailing atmospheric pollutant and the prevailing atmospheric pollution source in the areaThe method for determining the main atmospheric pollutants and the main atmospheric pollution sources in the area in the step S5 is as follows: according to the pollution index ratio L of the pollutants in the area j The accumulated percentage is calculated, and the pollutants with the accumulated percentage larger than a set value are listed as main atmospheric pollutants in the area; pollution index ratio L in area according to pollution source i The magnitude of the pollution is sorted, the cumulative percentage is calculated, and the pollution source with the cumulative percentage larger than the set value is listed as the main atmospheric pollution source of the area.
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