CN117689120B - Fine distribution method for fire radiation power crops of agricultural fire - Google Patents

Fine distribution method for fire radiation power crops of agricultural fire Download PDF

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CN117689120B
CN117689120B CN202410155446.5A CN202410155446A CN117689120B CN 117689120 B CN117689120 B CN 117689120B CN 202410155446 A CN202410155446 A CN 202410155446A CN 117689120 B CN117689120 B CN 117689120B
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周颖
李星朵
郎建垒
张琬婷
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Beijing University of Technology
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Abstract

The invention discloses a fire radiation power crop refined distribution method for agricultural fires, belonging to the technical field of atmospheric environment; comprising the following steps: calculating the crop straw yield per unit area based on the crop yield per unit area, the straw-to-grain ratio and the drying ratio data, and obtaining the crop straw yield based on the crop planting area and the crop straw yield per unit area; obtaining the crop waiting period of each province and the mature crop variety of each province in ten days; calculating the yield proportion of each type of crop straw in each ten days based on the crop straw yield and the mature crop types in each ten days of each province; determining the mature crop type of the time of the fire point according to the time of the satellite fire point; based on the yield proportion of various crop straws and the fire radiation power of each province every ten days, multi-crop fire radiation power data are obtained. The invention can realize the refined distribution of the fire radiation power of the agricultural fire spot position to all the planted crops, reduces the uncertainty of the emission estimation of the atmospheric pollutants generated by the open-air incineration of the multi-crop straws, and provides data support for constructing an emission list.

Description

Fine distribution method for fire radiation power crops of agricultural fire
Technical Field
The invention belongs to the technical field of atmospheric environment, relates to a fire radiation power crop refined distribution method of agricultural fires, and in particular relates to a fire radiation power crop refined distribution method of agricultural fires based on crop straw yield, crop waiting period and satellite detection fire point data.
Background
The difference of different crop types increases the uncertainty of the emission of the atmospheric pollutants in the open-air incineration of the straws; meanwhile, the larger the agricultural fire caused by the open burning of the straw, the larger the fire radiation power which can be detected by the satellite, and the close relation between the crop type and the straw yield is achieved. Therefore, the fine distribution of the fire radiation power of agricultural fires to crops is of great importance, and the method has great significance in establishing a discharge list of the atmospheric pollutants generated by the open-air incineration of the multi-crop straws with high space-time resolution.
At present, the method for determining the radiant power of the crop fire by burning the straws in the open air mainly takes the area of the planted crop at the position where the fire occurs as the basis, and determines the crop with the largest planting area as the crop burnt by the fire, so as to determine the radiant power of the crop fire at the fire, neglect other crops possibly planted at the position where the fire occurs, and cause certain uncertainty in the result.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides a method for finely distributing fire radiation power of agricultural fires based on crop straw yield, crop weather period and satellite detection fire point data, which can realize finely distributing the fire radiation power of the fire point positions of the agricultural fires to all planted crops, reduce the uncertainty of determining the existence of the crop fire radiation power of the fire point based on the maximum planting area of the crops at the fire point occurrence positions, provide data support for constructing a high-space-time resolution multi-crop-straw open-air incineration atmospheric pollutant emission list, provide accurate basic data for relevant departments to formulate control schemes, and realize quick and accurate management and control.
The invention discloses a fire radiation power crop refined distribution method for agricultural fires, which comprises the following steps:
Step 1, acquiring crop planting area, crop unit area yield, straw-to-grain ratio and drying ratio data;
Step 2, calculating the crop straw yield per unit area based on the crop yield per unit area, the straw-to-grain ratio and the drying ratio data, and obtaining the crop straw yield based on the crop planting area and the crop straw yield per unit area;
step 3, obtaining the crop waiting period of each province, and obtaining the mature crop variety of each province in ten days;
step 4, based on the crop straw yield and the mature crop types of each province in each ten days, obtaining the crop straw yield of each ten days, and calculating the crop straw yield proportion of each ten days;
step 5, acquiring satellite detection fire point data;
step 6, determining the mature crop type of the fire point occurrence time according to the satellite fire point occurrence time;
Step 7, determining whether the crop is planted at the fire point, screening out planted crops, and eliminating non-planted crops;
And 8, obtaining multi-crop fire radiation power data based on the yield proportion of various crop straws and the fire radiation power in each province every ten days.
As a further improvement of the present invention, the step 1 specifically includes:
Acquiring the planting area of the crop j in the province of y in i years and the yield of the crop j in the unit area;
In view of the fact that the crop straw grass-valley ratio coefficient is large in difference, actual measurement cannot be achieved; thus, the straw-to-grain ratio of crop j in province i and the dry ratio of crop j are obtained.
As a further development of the invention, in said step 2,
The calculation formula of the crop straw yield per unit area is as follows:
；
The calculation formula of crop straw yield is:
；
Wherein:
the yield per ton of the crop j in the unit area of y in i year of province is given;
The yield per unit area of the crop j in the province of i year y is per ton;
the unit ton is the straw yield of crop j in the province of y year i;
the planting area of the crop j in the year y of province is shown as a unit hm 2;
The crop j has a grass-valley ratio in province i, and has no dimension;
Is the dry ratio of crop j, and has no dimension.
As a further improvement of the present invention, the step 3 specifically includes:
According to agricultural practice information of each province, taking the growth change of crops into consideration, and constructing a mature crop database of each province every ten days with the resolution of 10 days.
As a further development of the invention, in said step 4,
The calculation formula of the yield proportion of various crop straws in ten days is as follows:
；
Wherein:
For the straw yield proportion of the crop j in the province i ten days t, the crop j has no dimension;
the unit ton is the straw yield of the crop j in the province i ten days t;
the unit ton is the straw yield of crop j in the province of y year i;
the mature times of the crop j in the province of i year y are single times; because some crops are ripe for more than one year, the crop straw yield ratio is calculated by dividing the crop maturity times.
As a further improvement of the present invention, the step 5 specifically includes:
Based on rural land utilization information and satellite fire point products of geospatial data cloud of China academy of sciences resource science data center, downloading required satellite detection fire point data, and screening moon fire points in China rural areas;
and classifying the open-air straw burning fire points of each month according to a 10-day period based on time information obtained by satellite monitoring.
As a further improvement of the present invention, in the step 6, if no crop matures at the time of fire occurrence, returning to the last ten days of the time of fire occurrence for searching; if the crops are still not mature in the last ten days, searching the crops in the last ten days until all mature crop types of the fire point occurrence time are determined.
As a further development of the invention, in said step 8,
The calculation formula of the multi-crop fire radiation power data is as follows:
；
Wherein:
The unit MW is the fire radiation power of the crop j in the province i ten days t;
For the straw yield proportion of the crop j in the province i ten days t, the crop j has no dimension;
the unit MW is fire radiation power of t in i ten days.
Compared with the prior art, the invention has the beneficial effects that:
The invention realizes the fine distribution of the fire radiation power of the agricultural fire spot position to all the planted crops based on the crop straw yield, the crop waiting period and the satellite detection fire spot data, reduces the uncertainty of the emission estimation of the atmospheric pollutants of the open-air incineration of the multi-crop straw, and provides data support for constructing a high space-time resolution open-air incineration atmospheric pollutant emission list of the multi-crop straw. The research results are helpful for constructing a high-space-time resolution multi-crop-straw open-air incineration atmospheric pollutant emission list, and provide scientific support for formulating an effective air quality improvement scheme.
Drawings
FIG. 1 is a flow chart of a fire radiation power crop refinement distribution of an agricultural fire in Guangdong province in 2010, according to an embodiment of the present invention;
FIG. 2 shows partial distribution results of different grids in different days of refined distribution of fire radiation power crops for agricultural fire in Guangdong province in 2010 according to an embodiment of the present invention;
Fig. 3 shows a refined distribution result of fire radiation power crops of class 12 crop agricultural fires in Guangdong province in 2010 according to an embodiment of the invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is described in further detail below with reference to the attached drawing figures:
as shown in fig. 1, the invention provides a method for finely distributing fire radiation power crops of agricultural fires, which takes Guangdong province of China as a research area and takes 12 kinds of crops as target crops for finely distributing the fire radiation power crops of the agricultural fires in 2010 of an implementation case, and comprises the following steps:
s1, downloading planting area data of grids (10 km) of 12 kinds of crops (rice, corn, wheat, soybean, peanut, rapeseeds, beet, sugarcane, cotton, potatoes, sesame and hemp) in Guangdong province of 2010 in an SPAM (Spatial Production Allocation Model) open storage database, and acquiring unit area yield of the 12 kinds of crops in Guangdong province of 2010 through statistical annual inspection of rural areas in China;
S2, obtaining a grass-valley ratio and a drying ratio of Guangdong province, and calculating the straw yield and the grid straw yield of each crop in unit area:
；
Wherein:
The yield per ton of the crop j per unit area in 2010 of Guangdong province;
yield per unit area per ton of crop j in 2010, guangdong province;
the yield of the crop j in 2010 in Guangdong province is per ton;
The planting area of the crop j in 2010 of Guangdong province is given in hm 2;
The crop j has a grass-to-valley ratio in Guangdong province, and is dimensionless;
Is the dry ratio of crop j, and has no dimension.
S3, acquiring the crop weather period of the Guangdong province according to the agricultural practice information of the Guangdong province, and establishing a database of various mature crops in the Guangdong province every ten days; and gridding (10 km) the Guangdong province to further obtain the data of various mature crop types of the Guangdong province in ten days. Among them, various mature crops in ten days of Guangdong province are: no crop matures from 1 to 3 months, only wheat from 3 to 4 months, two crops of wheat and rapeseed from 4 months, rapeseed and sesame from 5 months and middle, sesame and other crops from 5 months and middle, rice and soybean from 6 months and middle, rice, corn, soybean and peanut from 6 months and 7 months, rice, corn, soybean, peanut and sesame from 7 months and lower, corn, peanut and sesame from 7 months and 9 months, sesame and sesame from 9 months and other crops from 9 months and rice, potato, sesame and sesame from 10 months and other crops from 10 months and lower, rice, potato and other crops from 11 months and 12 months and no matures from 11 months and 12 months;
S4, based on the grid straw yield and the grid mature crop type data of the Guangdong province in 2010, obtaining the grid ten-day-by-ten-day various crop straw yields, and calculating the grid ten-day various crop straw yield ratio:
；
Wherein:
The crop j has no outline for the straw yield proportion of the crop j in the ten days t of Guangdong province;
the yield of the crop j is the yield of the straw per ton in ten days t of Guangdong province;
the yield of the crop j in 2010 in Guangdong province is per ton;
The number of mature times of the crop j in 2010 of Guangdong province is unit times; wherein, the paddy rice in Guangdong province is twice cooked in one year, and the hemp crops are three cooked in one year, so the ratio of the yield of the paddy rice to the straw of the hemp crops is calculated and divided by the times of the ripening.
S5, logging in an official website of the American aviation and aerospace agency, and downloading MODIS (Moderate Resolution Imaging Spectrometer) the 2010 month fire data of the sensor. The moon fire point in the Guangdong province rural area is screened out according to the Guangdong province rural land utilization information of China academy of sciences resources and environmental science data center and original satellite data products including MODIS moon fire points, and then the Fire Radiation Power (FRP) obtained by satellite detection is meshed at 5 arc minute grid intervals (10 km pixels);
s6, determining the mature crop type of the fire point occurrence time according to the satellite fire point occurrence time; if no crop matures at the time of the fire, returning to the last ten days of the time of the fire for searching; if the crops are still not mature in the last ten days, searching the crops in the last ten days until all mature crop types of the fire point occurrence time are determined. For example, if no crop matures in the grid from 1 month to 3 months in Guangdong province, returning to the late 12 months, and if no crop matures in the late 12 months, returning to the middle 12 months, and if sugarcane matures in the middle 12 months, the mature crop of the grid with the fire time from 1 month to 3 months is sugarcane; only wheat is used in the middle of 3 months to the upper of 4 months, and the mature crop of the grid with the time of occurrence of the fire is wheat in the middle of 3 months to the upper of 4 months.
And S7, after grid-by-grid fire points of Guangdong province are matched with mature crops, further determining whether crops at the fire point positions are planted grid by grid, screening out planted crops, and eliminating non-planted crops. For example, in the grid of 7 late month and early ten days of Guangdong province, rice, corn, soybean, peanut and hemp should be grown as mature crops, but in a certain grid, only rice, corn, soybean and peanut are planted in 2010, and hemp is not planted, so that hemp is removed.
S8, calculating and obtaining multi-crop fire radiation power data based on the yield proportion of various crop straws and Fire Radiation Power (FRP) in ten days of Guangdong province:
；
Wherein:
the unit of the fire radiation power of the crop j in the ten-day t of Guangdong province is MW;
The crop j has no outline for the straw yield proportion of the crop j in the ten days t of Guangdong province;
the unit of the radiation power is MW for fire radiation power of t in Guangdong province;
The partial distribution results of different grids in different ten days of refined distribution of fire radiation power crops in agricultural fire in Guangdong province in 2010 are shown in fig. 2, and the distribution results of different grids in all ten days represented in fig. 2 are statistically summarized to obtain the refined distribution results of fire radiation power crops in agricultural fire in class 12 crops in Guangdong province in 2010, as shown in fig. 3.
The invention has the advantages that:
The invention realizes the fine distribution of the fire radiation power of the agricultural fire spot position to all the planted crops based on the crop straw yield, the crop waiting period and the satellite detection fire spot data, reduces the uncertainty of the emission estimation of the atmospheric pollutants of the open-air incineration of the multi-crop straw, and provides data support for constructing a high space-time resolution open-air incineration atmospheric pollutant emission list of the multi-crop straw. The research results are helpful for constructing a high-space-time resolution multi-crop-straw open-air incineration atmospheric pollutant emission list, and provide scientific support for formulating an effective air quality improvement scheme.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (5)

1. A method for finely distributing fire radiation power crops in agricultural fires, which is characterized by comprising the following steps:
Step 1, acquiring crop planting area, crop unit area yield, straw-to-grain ratio and drying ratio data;
Step 2, calculating the crop straw yield per unit area based on the crop yield per unit area, the straw-to-grain ratio and the drying ratio data, and obtaining the crop straw yield based on the crop planting area and the crop straw yield per unit area;
step 3, obtaining the crop waiting period of each province, and obtaining the mature crop variety of each province in ten days; according to agricultural practice information of each province, considering the growth change of crops, and constructing a mature crop database of each province in ten days by taking 10 days as resolution;
step 4, based on the crop straw yield and the mature crop types of each province in each ten days, obtaining the crop straw yield of each ten days, and calculating the crop straw yield proportion of each ten days; the calculation formula of the yield proportion of various crop straws in ten days is as follows:
；
Wherein:
For the straw yield proportion of the crop j in the province i ten days t, the crop j has no dimension;
the unit ton is the straw yield of the crop j in the province i ten days t;
the unit ton is the straw yield of crop j in the province of y year i;
the mature times of the crop j in the province of i year y are single times;
step 5, acquiring satellite detection fire point data;
Step 6, determining the mature crop type of the fire point occurrence time according to the satellite fire point occurrence time; if no crop matures at the fire occurrence time, returning to the last ten days of the fire occurrence time for searching; if no crop is mature in the last ten days, searching the last ten days until all mature crop types of the fire point occurrence time are determined;
Step 7, determining whether the crop is planted at the fire point, screening out planted crops, and eliminating non-planted crops;
And 8, obtaining multi-crop fire radiation power data based on the yield proportion of various crop straws and the fire radiation power in each province every ten days.
2. The method for finely distributing fire radiation power crop of agricultural fire according to claim 1, wherein the step 1 specifically comprises:
Acquiring the planting area of the crop j in the province of y in i years and the yield of the crop j in the unit area;
the straw-to-grain ratio of crop j in province i and the dry ratio of crop j are obtained.
3. The method for finely distributing fire radiation power for agricultural fires according to claim 1, characterized in that in the step 2,
The calculation formula of the crop straw yield per unit area is as follows:
；
The calculation formula of crop straw yield is:
；
Wherein:
the yield per ton of the crop j in the unit area of y in i year of province is given;
The yield per unit area of the crop j in the province of i year y is per ton;
the unit ton is the straw yield of crop j in the province of y year i;
the planting area of the crop j in the year y of province is shown as a unit hm 2;
The crop j has a grass-valley ratio in province i, and has no dimension;
Is the dry ratio of crop j, and has no dimension.
4. The method for finely distributing fire radiation power crop of agricultural fire according to claim 1, wherein the step 5 specifically comprises:
Based on rural land utilization information and satellite fire point products of geospatial data cloud of China academy of sciences resource science data center, downloading required satellite detection fire point data, and screening moon fire points in China rural areas;
and classifying the open-air straw burning fire points of each month according to a 10-day period based on time information obtained by satellite monitoring.
5. The method for finely distributing fire radiation power for agricultural fires according to claim 1, characterized in that in the step 8,
The calculation formula of the multi-crop fire radiation power data is as follows:
；
Wherein:
The unit MW is the fire radiation power of the crop j in the province i ten days t;
For the straw yield proportion of the crop j in the province i ten days t, the crop j has no dimension;
the unit MW is fire radiation power of t in i ten days.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105184234A (en) * 2015-08-20 2015-12-23 北京市环境保护监测中心 Method and apparatus for measuring and calculating the quantity of pollutant emission generated because of burning of straws of winter wheat
CN107067334A (en) * 2017-04-21 2017-08-18 中国科学院遥感与数字地球研究所 Farmland fire and crop straw burning monitoring method and system based on multi- source Remote Sensing Data data
CN112214723A (en) * 2020-09-09 2021-01-12 暨南大学 Biomass open combustion emission dynamic characterization method based on multiple satellite fire points
CN117436617A (en) * 2023-11-10 2024-01-23 黄山学院 CRB carbon emission list acquisition method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111104858B (en) * 2019-11-19 2022-07-15 浙江大学 Large-scale crop phenology extraction method based on morphological model method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105184234A (en) * 2015-08-20 2015-12-23 北京市环境保护监测中心 Method and apparatus for measuring and calculating the quantity of pollutant emission generated because of burning of straws of winter wheat
CN107067334A (en) * 2017-04-21 2017-08-18 中国科学院遥感与数字地球研究所 Farmland fire and crop straw burning monitoring method and system based on multi- source Remote Sensing Data data
CN112214723A (en) * 2020-09-09 2021-01-12 暨南大学 Biomass open combustion emission dynamic characterization method based on multiple satellite fire points
CN117436617A (en) * 2023-11-10 2024-01-23 黄山学院 CRB carbon emission list acquisition method

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