Method and system for evaluating influence of sand and dust weather process on urban environment air quality

Abstract

The invention belongs to the technical field of environment monitoring, and relates to a method and system for evaluating the influence of a sand and dust weather process on urban environment air quality, and the method comprises the steps: collecting marked sand and dust influence day and non-sand and dust influence day data; calculating the average concentration of PM10 and the average concentration of PM2.5 after deducting the influence of the sand and dust based on the data of the sand and dust influence day and the non-sand and dust influence day; based on the PM10 average concentration and the PM2.5 average concentration after the sand dust influence is deducted, the influence of the sand dust weather process on the urban particulate matter concentration is evaluated; determining the number of sand and dust exceeding days and the number of sand and dust heavy pollution days based on the data of the sand and dust influence days and the non-sand and dust influence days; and evaluating the influence of the sand and dust weather process on the proportion of the urban excellent days and the heavy pollution days based on the sand and dust standard exceeding days and the sand and dust heavy pollution days. According to the method, the concentration of PM2.5 and PM10 particles, the proportion of the number of excellent days and the proportion of the number of heavy pollution days can be quantitatively evaluated.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental monitoring, and relates to a method and system for evaluating the impact of sandstorm weather processes on urban ambient air quality. Background Art

[0002] Dust storms are one of the important uncontrollable natural factors that affect ambient air quality. Their occurrence has obvious seasonal and regional characteristics. Strong winds frequently occur in the main dust source areas in spring, which can easily trigger large-scale dust storms and lead to the increase of inhalable particulate matter (PM 10 ) and fine particulate matter (PM 2.5 ) concentration increased sharply.

[0003] However, there is currently a lack of scientific assessment methods for the impact of sandstorm weather processes on urban air quality.

[0004] Therefore, there is an urgent need for a systematic and quantitative assessment method for the impact of sandstorm weather processes on urban environmental air quality to provide a scientific basis for precise pollution control. Summary of the Invention

[0005] Aiming at the problem that the existing technology lacks a scientific evaluation method for the impact of sandstorms on urban air quality, the present invention proposes a scientific and systematic evaluation method for the impact of sandstorms on urban ambient air quality, which can realize the impact of sandstorms on urban PM2.5. 10 、PM 2.5 Quantitative assessment of particulate matter concentration, proportion of days with good urban air quality, and proportion of days with heavy pollution.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A method for evaluating the impact of sandstorms on urban ambient air quality, comprising the following steps: 1) Collect the marked data of sandstorm-affected days and non-sandstorm-affected days, where the collected marked data of sandstorm-affected days and non-sandstorm-affected days include daily PM 10 、PM 2.5 , SO2, NO2, CO, O3-8h, air quality index (AQI), city, date, and identification result, where the identification result is a sandstorm-affected day or a non-sandstorm-affected day; 2) Calculate PM after deducting dust impact based on the dust impact day data and the non-dust impact day data 10 Average concentration and PM 2.5 average concentration; 3) Based on the PM after deducting the impact of dust 10 Average concentration and PM 2.5 The average concentration is used to assess the impact of dust weather processes on urban particulate matter concentrations; 4) Determine the number of days with excessive sand and dust pollution and the number of days with severe sand and dust pollution based on the data on sand and dust-affected days and the data on days without sand and dust pollution; 5) Based on the number of days with sand and dust exceeding the standard and the number of days with severe sand and dust pollution, evaluate the impact of sand and dust weather processes on the ratio of good days and heavy pollution days in the city.

[0007] Preferably, the step 2) specifically includes: 21) Calculate PM after deducting the impact of dust 10 Average concentration : , in, PM after deducting the impact of dust 10 Average concentration, n is the number of days without sandstorm impact, C i is the PM on the i-th non-dust-affected day 10 ; 22) Calculate PM after deducting the impact of dust 2.5 Average concentration: , in, PM after deducting the impact of dust 2.5 Average concentration, m is the number of days without sandstorm impact, C j is the PM on the jth non-dust-affected day 2.5 .

[0008] Preferably, the impact of the sandstorm process on the concentration of urban particulate matter in step 3) is : in, The impact of sandstorm weather on urban particulate matter concentrations, The measured urban PM during the evaluation period 10 Average concentration, The measured urban PM during the evaluation period 2.5 Average concentration.

[0009] Preferably, the step 4) specifically includes: 41) Determine the days with excessive dust and dust levels and calculate the number of days with excessive dust and dust levels based on the daily data of dust and dust impact days where particulate matter in the ambient air exceeds the standard but gaseous pollutants do not exceed the standard; 42) Determine the days of severe dust pollution and calculate the number of days of severe dust pollution based on the daily data of dust impact caused by dust weather, in which the concentration of ambient air particulate matter reaches the severe pollution category or above, but the concentration of gaseous pollutants does not reach the severe pollution category or above.

[0010] Preferably, in step 41), the days with excessive dust are determined based on the following conditions: air quality index AQI>100; PM 2.5 >75 μg / m 3 or PM 10 >150 μg / m 3 , SO2<150μg / m 3 , NO2<80μg / m 3 , CO<4 mg / m 3 , O3-8h<160μg / m 3 The step 42) determines the day of heavy dust pollution based on the following conditions: air index AQI> 200; PM 2.5 >150 μg / m 3 or PM 10 >350 μg / m 3 , SO2<800μg / m 3 , NO2<280μg / m 3 , CO<24 mg / m 3 , O3-8h<265μg / m 3 .

[0011] Preferably, the step 5) specifically includes: 51) Calculate the proportion of good weather days after deducting the impact of sandstorms D a : Da=((T a + T i ) / T t )×100%, Among them, D a is the ratio of good days after deducting the impact of sandstorms, T a is the total number of good days in the evaluation period, T i is the number of days with sand and dust exceeding the standard during the assessment period, T t is the number of effective monitoring days within the evaluation period; 52) Calculate the proportion of heavy pollution days after deducting the impact of sandstorms (D) b : D b =((T b -T j ) / T t )×100%, Among them, D b is the proportion of heavy pollution days after deducting the impact of sandstorms, T b is the total number of heavy pollution days during the assessment period, T j is the number of days with heavy dust pollution during the assessment period, T t is the number of effective monitoring days within the evaluation period; 53) Calculate the impact of sandstorms on the proportion of good and heavy pollution days in a city: R=(T k / T t )×100%, Among them, R is the ratio of days with sand and dust exceeding the standard or days with heavy sand and dust pollution to the effective monitoring days, T k T is the number of days with excessive sand and dust pollution or days with severe sand and dust pollution. t is the number of effective monitoring days within the evaluation period.

[0012] In addition, the present invention also provides an assessment system for the impact of sandstorms on urban ambient air quality, which is characterized by comprising: A data collection module is used to collect marked dust-affected day data and non-dust-affected day data; The first calculation module is used to calculate the PM after deducting the dust impact based on the dust impact day data and the non-dust impact day data. 10 Average concentration and PM 2.5 average concentration; The first evaluation module is used to evaluate the PM after deducting the dust effect. 10 Average concentration and PM 2.5 The average concentration is used to assess the impact of dust weather processes on urban particulate matter concentrations; A second calculation module is used to determine the number of days with excessive sand and dust pollution and the number of days with severe sand and dust pollution based on the sand and dust impact day data and the non-sand and dust impact day data; The second evaluation module is used to evaluate the impact of the sandstorm weather process on the ratio of good days to heavy pollution days in the city based on the number of days with sandstorms exceeding the standard and the number of days with heavy sandstorm pollution.

[0013] Furthermore, the present invention also provides an evaluation device for the impact of sandstorms on urban ambient air quality, which is characterized by comprising: one or more processors; a memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the above-mentioned method for evaluating the impact of sandstorm weather processes on urban environmental air quality. Finally, the present invention also provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the program is executed by a processor, the steps of the method for evaluating the impact of sandstorm weather processes on urban environmental air quality as described above are implemented.

[0014] Compared with the prior art, the method and system for evaluating the impact of sandstorms on urban ambient air quality of the present invention have one or more of the following beneficial technical effects: 1. The method for evaluating the impact of sandstorms on urban ambient air quality provided by the present invention can achieve a quantitative evaluation of the impact of sandstorms on ambient air quality.

[0015] 2. The present invention can achieve the effect of sandstorm weather on urban PM 10 、PM 2.5 Quantitative assessment of particulate matter concentration, the proportion of days with good urban air quality, and the proportion of days with heavy pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of the method for evaluating the impact of sandstorm weather processes on urban ambient air quality according to the present invention.

[0017] Figure 2 It is a schematic diagram of the composition of the evaluation system for the impact of sandstorm weather processes on urban ambient air quality according to the present invention. DETAILED DESCRIPTION

[0018] Before describing in detail any embodiment of the present invention, it should be understood that the present invention is not limited in its application to the construction and arrangement details of the components set forth in the following description or illustrated in the following figures. The present invention is capable of other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used herein are for descriptive purposes and should not be considered restrictive. The use of "including" or "having" and their variations herein is intended to cover the items and their equivalents set forth below and additional items. Unless otherwise specified or limited, the terms "mounted", "connected", "supported" and "coupled" and their variations are used broadly and cover direct mounting and indirect mounting, connection, support and coupling. In addition, "connected" and "coupled" are not limited to physical or mechanical connections or couplings. Furthermore, on the first hand, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second hand, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0019] Figure 1 The flow chart of the method for evaluating the impact of sandstorm weather on urban ambient air quality of the present invention is shown. Figure 1As shown, the method for evaluating the impact of sandstorms on urban ambient air quality of the present invention comprises the following steps: 1. Data collection.

[0020] In the present invention, marked sandstorm-affected day data and non-sandstorm-affected day data of a certain historical period (eg, the past year, etc.) may be collected.

[0021] Specifically, the collected data on days affected by dust and days not affected by dust include daily PM 10 、PM 2.5 , SO2, NO2, CO, O3-8h, air index AQI, city, date, and judgment result, where the judgment result is a sandstorm-affected day or a non-sandstorm-affected day.

[0022] Therefore, based on the discrimination results, it can be determined whether a certain day in a certain city is a sandstorm-affected day or a non-sandstorm-affected day, and the PM2.5 level of the city on that day can also be determined based on the collected data. 10 、PM 2.5 , SO2, NO2, CO, O3-8h, air index AQI and other daily average values ​​of various indicators affecting air quality.

[0023] 2. Calculation of PM after deducting the impact of dust 10 and PM 2.5 Average concentration.

[0024] In the present invention, the PM2.5 after deducting the dust impact is calculated based on the collected dust impact day data and non-dust impact day data (evaluation period, such as February 10, 2025 to May 10, 2025). 10 Average concentration and PM 2.5 Average concentration, including: 1. Calculate PM after deducting the impact of dust 10 Average concentration : , in, PM after deducting the impact of dust 10 Average concentration (μg / m 3 ), n is the number of days without sandstorm impact, C i is the PM on the i-th non-dust-affected day 10 (Unit: μg / m 3 ).

[0025] 2. Calculate PM after deducting the impact of dust 2.5 Average concentration: , in, PM after deducting the impact of dust 2.5 Average concentration (μg / m 3 ), m is the number of days without sandstorm impact, C j is the PM on the jth non-dust-affected day 2.5 (Unit: μg / m 3 ).

[0026] 3. Evaluate the impact of sandstorm weather processes on urban particulate matter concentrations.

[0027] After deducting the dust effect, PM 10 and PM 2.5 After averaging the concentration, the PM after deducting the dust effect can be calculated. 10 Average concentration and PM 2.5 The average concentration evaluates the impact of sandstorm weather processes on urban particulate matter concentrations over a period of time (e.g., February 10, 2025 to May 10, 2025).

[0028] Specifically, the impact of sandstorms on urban particulate matter concentration is: : in, is the impact of sandstorms on urban particulate matter concentrations (unit: μg / m 3 ), The measured urban PM during the evaluation period 10 Average concentration (μg / m 3 ), The measured urban PM during the evaluation period 2.5 Average concentration (μg / m 3 ).

[0029] Thus, through the The present invention can realize the control of urban PM during sandstorm weather. 10 、PM 2.5 Quantitative assessment of particulate matter concentrations.

[0030] 4. Determine the number of days with excessive sand and dust pollution and the number of days with severe sand and dust pollution.

[0031] The number of days with excessive sand and dust pollution and the number of days with severe sand and dust pollution can be determined based on the sand and dust impact day data and the non-sand and dust impact day data, which specifically include: 1. Based on the daily data of sandstorms affecting the environment where particulate matter in the ambient air exceeds the standard but gaseous pollutants do not exceed the standard, determine the days with sandstorms exceeding the standard and calculate the number of days with sandstorms exceeding the standard.

[0032] In the present invention, specifically, if the air quality index AQI>100 on a certain day; PM 2.5>75 μg / m 3 or PM 10 >150 μg / m 3 , SO2<150μg / m 3 , NO2<80μg / m 3 , CO<4 mg / m 3 , O3-8h<160μg / m 3 , then the day is determined to be a day with excessive sand and dust. The number of days with excessive sand and dust during the assessment period can be calculated by accumulating the number of days with excessive sand and dust during the assessment period.

[0033] 2. Determine the days of severe sandstorm pollution and calculate the number of days of severe sandstorm pollution based on the daily data of sandstorm impact when the concentration of ambient air particulate matter reaches the severe pollution category or above and the concentration of gaseous pollutants does not reach the severe pollution category or above.

[0034] In the present invention, specifically, if the air quality index AQI>200 on a certain day; PM 2.5 >150 μg / m 3 or PM 10 >350 μg / m 3 , SO2<800μg / m 3 , NO2<280μg / m 3 , CO<24 mg / m 3 , O3-8h<265μg / m 3 , then the day is considered a day of severe sand and dust pollution. The number of days of severe sand and dust pollution during the assessment period can be calculated by accumulating the number of days of severe sand and dust pollution during the assessment period.

[0035] 5. Evaluate the impact of sandstorms on the ratio of good days to heavy pollution days in cities.

[0036] The impact of sandstorms on the ratio of good days to heavy pollution days in a city can be assessed based on the number of days with sandstorms exceeding the standard and the number of days with heavy sandstorm pollution, which specifically includes: 1. Calculate the proportion of good days after deducting the impact of sandstorms D a : Da=((T a +T i ) / T t )×100%, Where D a is the ratio of good days after deducting the impact of sandstorms, T a is the total number of good days in the assessment period (including days with good sandstorm impact), T i is the number of days with sand and dust exceeding the standard during the assessment period, T t= is the number of effective monitoring days during the evaluation period. Whether a day is a good day can be determined based on the daily AQI during the evaluation period, and the total number of good days during the evaluation period can be obtained by accumulating the good days.

[0037] 2. Calculate the proportion of heavy pollution days after deducting the impact of sandstorms D b : D b =((T b -T j ) / T t )×100%, Where D b is the proportion of heavy pollution days after deducting the impact of sandstorms, T b is the total number of heavy pollution days during the assessment period, T j is the number of days with heavy dust pollution during the assessment period, T t is the number of effective monitoring days during the evaluation period. Whether a day is a heavy pollution day can be determined based on the daily AQI during the evaluation period, and the total number of heavy pollution days during the evaluation period can be obtained by accumulating the heavy pollution days.

[0038] 3. Calculate the impact of sandstorms on the proportion of good and heavy pollution days in a city: R=(T k / T t )×100%, Among them, R is the ratio of days with sand and dust exceeding the standard or days with heavy sand and dust pollution to the effective monitoring days, T k T is the number of days with excessive sand and dust pollution or days with severe sand and dust pollution. t is the number of effective monitoring days within the evaluation period.

[0039] Therefore, the present invention can achieve quantitative evaluation of the proportion of days with good air quality and the proportion of days with heavy pollution in cities due to sandstorm weather processes.

[0040] Figure 2 The schematic diagram of the system for evaluating the impact of sandstorms on urban air quality is shown in the figure. Figure 2 As shown, the evaluation system for the impact of sandstorm weather on urban ambient air quality of the present invention includes: 1. Data collection module.

[0041] The data collection module is used to collect marked sand and dust impact day data and non-sand and dust impact day data.

[0042] 2. The first calculation module.

[0043] The first calculation module is used to calculate the PM after deducting the dust impact based on the dust impact day data and the non-dust impact day data. 10Average concentration and PM 2.5 Average concentration.

[0044] 3. The first evaluation module.

[0045] The first evaluation module is used to evaluate the PM after deducting the dust effect. 10 Average concentration and PM 2.5 The average concentration is used to evaluate the impact of sandstorm weather processes on urban particulate matter concentrations.

[0046] 4. The second calculation module.

[0047] The second calculation module is used to determine the number of days with excessive sand and dust pollution and the number of days with severe sand and dust pollution based on the sand and dust impact day data and the non-sand and dust impact day data.

[0048] 5. The second evaluation module.

[0049] The second evaluation module is used to evaluate the impact of the sandstorm weather process on the ratio of good days to heavy pollution days in the city based on the number of days with sandstorms exceeding the standard and the number of days with heavy sandstorm pollution.

[0050] In addition, the present invention also provides an evaluation device for the impact of sandstorm weather processes on urban environmental air quality, which includes: one or more processors; a memory for storing one or more programs; when the one or more programs are executed by the one or more processors, the one or more processors implement the evaluation method for the impact of sandstorm weather processes on urban environmental air quality as described above. Finally, the present invention also provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the program is executed by a processor, the steps of the method for evaluating the impact of sandstorm weather processes on urban environmental air quality as described above are implemented.

[0051] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art may, based on the principles of the present invention, modify or replace the technical solutions of the present invention with equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A method for evaluating the impact of sandstorms on urban ambient air quality, characterized in that: The following steps are involved: 1) Collect the marked data of sandstorm-affected days and non-sandstorm-affected days, where the collected marked data of sandstorm-affected days and non-sandstorm-affected days include daily PM 10 、PM 2.5 , SO2, NO2, CO, O3-8h, air quality index (AQI), city, date, and identification result, where the identification result is a sandstorm-affected day or a non-sandstorm-affected day; 2) Calculate PM after deducting dust impact based on the dust impact day data and the non-dust impact day data 10 Average concentration and PM 2.5 average concentration; 3) Based on the PM after deducting the impact of dust 10 Average concentration and PM 2.5 The average concentration is used to assess the impact of dust weather processes on urban particulate matter concentrations; 4) Determine the number of days with excessive sand and dust pollution and the number of days with severe sand and dust pollution based on the data on sand and dust-affected days and the data on days without sand and dust pollution; 5) Based on the number of days with sand and dust exceeding the standard and the number of days with severe sand and dust pollution, evaluate the impact of sand and dust weather processes on the ratio of good days and heavy pollution days in the city.

2. The method for evaluating the impact of sandstorms on urban air quality according to claim 1, characterized in that: The step 2) specifically includes: 21) Calculate PM after deducting the impact of dust 10 Average concentration : ， in, PM after deducting the impact of dust 10 Average concentration, n is the number of days without sandstorm impact, C i is the PM on the i-th non-dust-affected day 10 ; 22) Calculate PM after deducting the impact of dust 2.5 Average concentration: ， in, PM after deducting the impact of dust 2.5 Average concentration, m is the number of days without sandstorm impact, C j is the PM on the jth non-dust-affected day 2.5。 3. The method for evaluating the impact of sandstorms on urban air quality according to claim 2, characterized in that: The impact of the sandstorm process on the urban particulate matter concentration in step 3) is: : in, The impact of sandstorm weather on urban particulate matter concentrations, The measured urban PM during the evaluation period 10 Average concentration, The measured urban PM during the evaluation period 2.5 Average concentration.

4. The method for evaluating the impact of sandstorms on urban air quality according to claim 1, characterized in that: The step 4) specifically includes: 41) Determine the days with excessive dust and dust levels and calculate the number of days with excessive dust and dust levels based on the daily data of dust and dust impact days where particulate matter in the ambient air exceeds the standard but gaseous pollutants do not exceed the standard; 42) Determine the days of severe dust pollution and calculate the number of days of severe dust pollution based on the daily data of dust impact caused by dust weather, in which the concentration of ambient air particulate matter reaches the severe pollution category or above, but the concentration of gaseous pollutants does not reach the severe pollution category or above.

5. The method for evaluating the impact of sandstorms on urban air quality according to claim 4, characterized in that: In step 41), the days with excessive dust are determined based on the following conditions: air quality index AQI>100; PM 2.5 >75 μg / m 3 or PM 10 >150 μg / m 3 , SO2<150μg / m 3 , NO2<80μg / m 3 , CO<4 mg / m 3 , O3-8h<160μg / m 3 The step 42) determines the day of heavy dust pollution based on the following conditions: air index AQI> 200; PM 2.5 >150 μg / m 3 or PM 10 >350 μg / m 3 , SO2<800μg / m 3 , NO2<280μg / m 3 , CO<24 mg / m 3 , O3-8h<265μg / m 3 .

6. The method for evaluating the impact of sandstorms on urban air quality according to claim 1, characterized in that: The step 5) specifically includes: 51) Calculate the proportion of good weather days after deducting the impact of sandstorms D a : Da=((T a +T i ) / T t )×100%, Among them, D a is the ratio of good days after deducting the impact of sandstorms, T a is the total number of good days in the evaluation period, T i is the number of days with sand and dust exceeding the standard during the assessment period, T t is the number of effective monitoring days within the evaluation period; 52) Calculate the proportion of heavy pollution days after deducting the impact of sandstorms (D) b : D b =((T b -T j ) / T t )×100%, Among them, D b is the proportion of heavy pollution days after deducting the impact of sandstorms, T b is the total number of heavy pollution days during the assessment period, T j is the number of days with heavy dust pollution during the assessment period, T t is the number of effective monitoring days within the evaluation period; 53) Calculate the impact of sandstorms on the proportion of good and heavy pollution days in a city: R=(T k / T t )×100%, Among them, R is the ratio of days with sand and dust exceeding the standard or days with heavy sand and dust pollution to the effective monitoring days, T k T is the number of days with excessive sand and dust pollution or days with severe sand and dust pollution. t is the number of effective monitoring days within the evaluation period.

7. A system for evaluating the impact of sandstorms on urban air quality, characterized in that: include: A data collection module is used to collect marked dust-affected day data and non-dust-affected day data; The first calculation module is used to calculate the PM after deducting the dust impact based on the dust impact day data and the non-dust impact day data. 10 Average concentration and PM 2.5 average concentration; The first evaluation module is used to evaluate the PM after deducting the dust effect. 10 Average concentration and PM 2.5 The average concentration is used to assess the impact of dust weather processes on urban particulate matter concentrations; A second calculation module is used to determine the number of days with excessive sand and dust pollution and the number of days with severe sand and dust pollution based on the sand and dust impact day data and the non-sand and dust impact day data; The second evaluation module is used to evaluate the impact of the sandstorm weather process on the ratio of good days to heavy pollution days in the city based on the number of days with sandstorms exceeding the standard and the number of days with heavy sandstorm pollution.

8. An assessment device for the impact of sandstorms on urban air quality, characterized in that: include: one or more processors; a memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the method for evaluating the impact of sandstorm weather processes on urban ambient air quality as described in any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method for evaluating the impact of sandstorm weather processes on urban ambient air quality are implemented as described in any one of claims 1 to 6.

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