CN117131313A - Method for calculating soil moisture content parameters of traditional Chinese medicinal materials, computer equipment and medium - Google Patents
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Abstract
The application discloses a method for calculating soil moisture content parameters of traditional Chinese medicinal materials, computer equipment and a medium, and relates to the field of soil moisture content calculation, wherein the method comprises the following steps: calculating the surface net radiant flux according to the surface albedo, the total solar radiant flux, the atmospheric emissivity and the surface emissivity of the Chinese medicinal material planting area; calculating the soil heat flux; calculating the transpiration of the reference crop according to the net radiation flux of the ground surface, the soil heat flux, the air temperature, the air humidity and the air pressure; calculating a dynamic crop coefficient by using a real-time value of a normalized vegetation index of a Chinese medicinal material planting area; calculating the crop transpiration according to the reference crop transpiration and the dynamic crop coefficient; the water demand and the latent heat flux were calculated from the transpiration of the reference crop. According to the application, the soil moisture content parameters are calculated through parameters closely related to the growth stage and the environmental condition of the traditional Chinese medicinal materials, which are acquired in real time, so that the soil moisture content parameters are more accurate, and all the parameters required for calculating the soil moisture content parameters are easy to acquire.
Description
Technical Field
The application relates to the field of soil moisture content calculation, in particular to a method for calculating soil moisture content parameters of traditional Chinese medicinal materials, computer equipment and a medium.
Background
Soil moisture content detection of the growth environment of the traditional Chinese medicinal materials is very important. The soil moisture content is the water content in the soil of a plough layer of a traditional Chinese medicinal material, plays a vital role in accumulation of organic matter content in the growth process of the traditional Chinese medicinal material, energy circulation between the atmosphere and the soil, soil drought early warning and agricultural water consumption efficiency, and is generally measured by latent heat flux, crop transpiration and water demand. At present, the calculation of soil moisture content parameters in the prior art is generally based on an aerodynamic principle, and a soil heat balance method is used for calculation, wherein the calculation of aerodynamic parameters, soil physical parameters and the like is difficult, and part of parameters are closely related to the growth stage and environmental conditions of traditional Chinese medicinal materials, so that the calculation of the soil moisture content parameters is difficult.
Disclosure of Invention
The application aims to provide a method, computer equipment and medium for calculating soil moisture content parameters of traditional Chinese medicinal materials, which can improve the accuracy of the soil moisture content parameters of the traditional Chinese medicinal materials.
In order to achieve the above object, the present application provides the following solutions:
a method for calculating soil moisture content parameters of Chinese medicinal materials, comprising the following steps of:
s1: calculating the surface net radiation flux of the Chinese medicinal material planting area according to the surface albedo, the total solar radiation flux, the atmospheric emissivity and the surface emissivity of the Chinese medicinal material planting area; the earth surface albedo is determined by the solar uplink short-wave radiation flux and the solar downlink short-wave radiation flux of the traditional Chinese medicinal material planting area; the total solar radiation flux is determined by the solar downlink short wave radiation flux of the traditional Chinese medicinal material planting area; the atmospheric emissivity is determined by the air temperature of the traditional Chinese medicine planting area; the earth surface emissivity is determined by vegetation coverage of the traditional Chinese medicine planting area; the vegetation coverage of the traditional Chinese medicine planting area is calculated by the real-time value of the normalized vegetation index of the traditional Chinese medicine planting area, the normalized vegetation index when the soil is completely uncovered and the normalized vegetation index when the vegetation is covered;
s2: calculating the soil heat flux of the traditional Chinese medicine planting area according to the surface net radiation flux and the vegetation coverage;
s3: calculating the reference crop transpiration of the traditional Chinese medicine planting area according to the surface net radiation flux, the soil heat flux, the air temperature, the air humidity and the air pressure of the traditional Chinese medicine planting area;
s4: calculating the dynamic crop coefficients of the traditional Chinese medicine planting areas according to the real-time values of the normalized vegetation indexes of the traditional Chinese medicine planting areas;
s5: calculating the crop transpiration of crops in the traditional Chinese medicine planting area according to the reference crop transpiration and the dynamic crop coefficient;
s6: calculating the water demand and the latent heat flux of crops in the traditional Chinese medicine planting area according to the transpiration of the reference crops; the crop transpiration quantity, the water demand and the latent heat flux form soil moisture content parameters.
Optionally, before S1, the method further includes:
determining a normalized vegetation index when the soil is completely uncovered in the traditional Chinese medicine planting area according to the radiation flux parameter when the soil is completely uncovered in the traditional Chinese medicine planting area; the radiation flux parameters comprise the uplink and downlink radiation fluxes of the red wave band and the uplink and downlink radiation fluxes of the near infrared wave band;
and determining a normalized vegetation index when the full vegetation is covered in the traditional Chinese medicine planting area according to the radiation flux parameter when the full vegetation is covered in the traditional Chinese medicine planting area.
Optionally, a calculation formula of vegetation coverage of the planting area of the traditional Chinese medicinal materials is as follows:
；
wherein,vegetation coverage of the planting area of the traditional Chinese medicinal materials; NDVI is a real-time value of normalized vegetation index of the chinese herbal medicine planting area; NDVI s Normalized vegetation index when the soil is completely bare in the Chinese medicinal material planting area; NDVI v The normalized vegetation index is used for covering the whole vegetation in the planting area of the traditional Chinese medicinal materials.
Optionally, the calculation formula of the surface net radiant flux of the Chinese medicinal material planting area is as follows:
；
wherein,the net radiation flux of the ground surface of the Chinese medicinal material planting area; />Is the earth surface albedo; />Is the total radiant flux of the sun; />Is the atmospheric emissivity; />Is the emissivity of the earth surface; />Is the boltzmann constant; />Is the air temperature.
Optionally, the calculation formula of the soil heat flux of the Chinese herbal medicine planting area is as follows:
；
wherein G is the soil heat flux of a Chinese medicinal material planting area;the net radiation flux of the ground surface of the Chinese medicinal material planting area;soil heat flux under the condition of full vegetation coverage accounts for the proportion of net radiation; />The soil heat flux under the bare soil condition accounts for the net radiation proportion; />Is the vegetation coverage of the planting area of the traditional Chinese medicinal materials.
Optionally, S3 specifically includes:
calculating saturated water vapor pressure according to the air temperature;
calculating average saturated water vapor pressure in a measurement period according to the saturated water vapor pressure;
calculating an actual average water vapor pressure according to the saturated water vapor pressure, the average saturated water vapor pressure and the average air humidity in the measurement period;
calculating a saturated water vapor pressure temperature slope according to the air temperature and the saturated water vapor pressure;
calculating a hygrometer constant according to the air pressure;
and calculating the reference crop transpiration quantity of the traditional Chinese medicine planting area according to the surface net radiation flux, the soil heat flux, the average saturated water vapor pressure, the actual average water vapor pressure, the saturated water vapor pressure temperature slope and the hygrometer constant of the traditional Chinese medicine planting area.
Optionally, the calculation formula of the transpiration of the reference crop in the planting area of the traditional Chinese medicinal materials is as follows:
；
wherein ET is 0 Transpiration of reference crops in a traditional Chinese medicine planting area;is the saturated water vapor pressure temperature slope; />The net radiation flux of the ground surface of the Chinese medicinal material planting area; g is the soil heat flux of the Chinese medicinal material planting area; />Is hygrometer constant; />Wind speed at a height of 2m from the ground; />For measuring the average saturated water vapor pressure in the period; />Is the actual average water vapor pressure; />Is the air temperature.
Optionally, the calculation formula of the water demand of crops in the planting area of the traditional Chinese medicinal materials is as follows:
；
wherein CWD is the water demand of crops in the planting area of the Chinese medicinal materials; RF is rainfall in the Chinese medicinal material planting area;is the transpiration of crops。
The application also provides computer equipment, which comprises a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to execute the steps of the method for calculating the soil moisture content parameters of the traditional Chinese medicinal materials.
The application also provides a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is suitable for being loaded by a processor and executing the method for calculating the soil moisture content parameters of the traditional Chinese medicinal materials.
According to the specific embodiment provided by the application, the application discloses the following technical effects: the application provides a method for calculating soil moisture content parameters of Chinese medicinal materials, computer equipment and a medium, wherein the method comprises the following steps: calculating the surface net radiant flux of the Chinese medicinal material planting area according to the surface albedo, the total solar radiant flux, the atmospheric emissivity and the surface emissivity of the Chinese medicinal material planting area; the earth surface albedo is determined by the solar uplink short-wave radiation flux and the solar downlink short-wave radiation flux of the traditional Chinese medicine planting area; the total solar radiation flux is determined by the solar downlink short wave radiation flux of the Chinese medicinal material planting area; the atmospheric emissivity is determined by the air temperature of the planting area of the traditional Chinese medicinal materials; the earth surface emissivity is determined by vegetation coverage of the Chinese medicinal material planting area; the vegetation coverage of the traditional Chinese medicine planting area is calculated by the real-time value of the normalized vegetation index of the traditional Chinese medicine planting area, the normalized vegetation index when the soil is completely uncovered and the normalized vegetation index when the vegetation is covered; calculating the soil heat flux of the Chinese medicinal material planting area according to the net radiation flux of the earth surface and the vegetation coverage; calculating the reference crop transpiration of the traditional Chinese medicine planting area according to the surface net radiation flux, the soil heat flux, the air temperature, the air humidity and the air pressure of the traditional Chinese medicine planting area; calculating dynamic crop coefficients of the traditional Chinese medicine planting areas according to real-time values of normalized vegetation indexes of the traditional Chinese medicine planting areas; calculating the crop transpiration of crops in the traditional Chinese medicine planting area according to the reference crop transpiration and the dynamic crop coefficient; calculating the water demand and the latent heat flux of crops in a traditional Chinese medicine planting area according to the transpiration of the reference crops; the transpiration quantity, water demand and latent heat flux of crops form soil moisture content parameters. According to the application, the soil moisture content parameters are calculated through the parameters closely related to the growth stage and the environmental condition of the traditional Chinese medicinal materials, which are acquired in real time, the result is more accurate, and the parameters required for calculating the soil moisture content parameters are easy to acquire.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a method for calculating soil moisture content parameters of Chinese medicinal materials according to an embodiment of the application;
fig. 2 is a schematic diagram of a specific implementation flow of a method for calculating soil moisture content parameters of a traditional Chinese medicine provided by an embodiment of the application;
fig. 3 is a schematic structural diagram of a computer device according to the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The application aims to provide a calculation method, computer equipment and medium for soil moisture content parameters of traditional Chinese medicinal materials, which are characterized in that light radiation data of growth environments of the traditional Chinese medicinal materials are collected in real time to directly reflect the growth stage and growth conditions of plants (the real-time value of normalized vegetation indexes of planting areas of the traditional Chinese medicinal materials is calculated according to the real-time value of the light radiation data), the calculation method is combined with the meteorological data of the growth environments of the traditional Chinese medicinal materials, and crop transpiration and latent heat flux in the growth period of the traditional Chinese medicinal materials are calculated, so that the calculation difficulty of the traditional method is simplified, and the accuracy of the calculated soil moisture content parameters is improved; compared with the traditional model which is based on an aerodynamic model to calculate soil moisture content parameters, the environment light radiation model provided by the application has the advantages that the model variables are too many and are difficult to measure, the growth health condition of the traditional Chinese medicinal materials can be reflected, and the soil moisture content of the growth soil of the traditional Chinese medicinal materials can be reflected. In addition, the environmental light radiation data is simpler to obtain, and the calculation difficulty of soil moisture content parameters of the traditional Chinese medicinal materials is reduced.
In order that the above-recited objects, features and advantages of the present application will become more readily apparent, a more particular description of the application will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 and 2, the application provides a method for calculating soil moisture content parameters of Chinese medicinal materials, which comprises the following steps:
s1: calculating the surface net radiation flux of the Chinese medicinal material planting area according to the surface albedo, the total solar radiation flux, the atmospheric emissivity and the surface emissivity of the Chinese medicinal material planting area; the earth surface albedo is determined by the solar uplink short-wave radiation flux and the solar downlink short-wave radiation flux of the traditional Chinese medicinal material planting area; the total solar radiation flux is determined by the solar downlink short wave radiation flux of the traditional Chinese medicinal material planting area; the atmospheric emissivity is determined by the air temperature of the traditional Chinese medicine planting area; the earth surface emissivity is determined by vegetation coverage of the traditional Chinese medicine planting area; the vegetation coverage of the traditional Chinese medicine planting area is calculated by the real-time value of the normalized vegetation index of the traditional Chinese medicine planting area, the normalized vegetation index when the soil is completely uncovered and the normalized vegetation index when the vegetation is covered.
S2: and calculating the soil heat flux of the traditional Chinese medicine planting area according to the surface net radiation flux and the vegetation coverage.
S3: and calculating the transpiration quantity of the reference crop of the traditional Chinese medicine planting area according to the surface net radiation flux, the soil heat flux, the air temperature, the air humidity and the air pressure of the traditional Chinese medicine planting area.
S4: and calculating the dynamic crop coefficient of the traditional Chinese medicine planting area according to the real-time value of the normalized vegetation index of the traditional Chinese medicine planting area.
S5: and calculating the crop transpiration of crops in the traditional Chinese medicine planting area according to the reference crop transpiration and the dynamic crop coefficient.
S6: calculating the water demand and the latent heat flux of crops in the traditional Chinese medicine planting area according to the transpiration of the reference crops; the crop transpiration quantity, the water demand and the latent heat flux form soil moisture content parameters.
Firstly, acquiring environmental light radiation data in a Chinese medicinal material planting area from meteorological data, wherein the environmental light radiation data of the Chinese medicinal material planting area comprises real-time values of solar uplink short wave radiation flux and solar downlink short wave radiation flux, solar uplink radiation flux and solar downlink radiation flux of a red wave band and a near infrared wave band when the Chinese medicinal material planting area is completely bare soil and the Chinese medicinal material planting area is covered by full vegetation.
The calculation formula of the earth surface albedo of the Chinese medicinal material planting area is as follows:
。 （1）
wherein,is the earth surface albedo; />For solar uplink short wave radiation (+)>）；/>For solar downlink short wave radiation (+)>）。
In this embodiment, before step S1, the method further includes:
determining a normalized vegetation index when the soil is completely uncovered in the traditional Chinese medicine planting area according to the radiation flux parameter when the soil is completely uncovered in the traditional Chinese medicine planting area; the radiation flux parameters include the up and down radiation fluxes of the red wave band and the up and down radiation fluxes of the near infrared band.
And determining a normalized vegetation index when the full vegetation is covered in the traditional Chinese medicine planting area according to the radiation flux parameter when the full vegetation is covered in the traditional Chinese medicine planting area.
The calculation formula of the normalized vegetation index when the soil is completely bare is as follows:
。 （2）
wherein,normalized vegetation index at full bare soil (NDVI normalized vegetation index, normalized Difference Vegetation Index); />And->The definition of the albedo of the near infrared band and the albedo of the red wave band when the soil is completely bare is the same as that of (1). I.e. < ->，/>Likewise, a normalized vegetation index +.>。/>。
The real-time value of the normalized vegetation index is different according to the growth stages of the traditional Chinese medicinal materials, and the calculation formula is as follows. Wherein (1)>Is the real-time value of the albedo of the near infrared band of the planting area of the Chinese medicinal materials>Is a real-time value of the albedo of the infrared band of the planting area of the traditional Chinese medicine materials.
After the normalized vegetation index when the Chinese medicinal material planting area is completely bare soil and the normalized vegetation index when the whole vegetation is covered are obtained, the vegetation coverage of the Chinese medicinal material planting area can be calculated, and the calculation formula is as follows:
。 （3）
wherein,vegetation coverage of the planting area of the traditional Chinese medicinal materials; NDVI is the real-time value of the normalized vegetation index of the Chinese herbal medicine planting area; NDVI s Normalized vegetation index when the soil is completely bare in the Chinese medicinal material planting area; NDVI v The normalized vegetation index is used for covering the whole vegetation in the planting area of the traditional Chinese medicinal materials.
In S1, the calculation formula of the surface emissivity is:
。 （4）
wherein,is the emissivity of the earth's surface.
Environmental meteorological data in the traditional Chinese medicine planting area is obtained from the meteorological data, and the environmental meteorological data in the traditional Chinese medicine planting area comprise wind speed, air temperature, air humidity, air pressure and the like.
The atmospheric emissivity is calculated according to the air temperature, and the calculation formula of the atmospheric emissivity is as follows:
。 （5）
wherein,is the atmospheric emissivity; a is the atmospheric emission constant, and the calculation formula is +.>；/>Is Boltzmann constant, & gt>；/>Is the air temperature (K).
The ground surface net radiant flux of the Chinese medicinal material planting area is calculated according to the ground surface albedo, the total solar radiant flux, the atmospheric emissivity and the ground surface emissivity, and the calculation formula of the ground surface net radiant flux of the Chinese medicinal material planting area is as follows:
。 （6）
wherein,the surface net radiant flux of the Chinese medicinal material planting area is (/ -for Chinese medicinal materials>）；/>Is the earth surface albedo; />For the total solar radiation flux, <' > in this embodiment, < > in>，/>For solar downlink short wave radiation (+)>）；/>Is the atmospheric emissivity; />Is the emissivity of the earth surface; />Is the boltzmann constant; />Is the air temperature (K).
The soil heat flux is calculated according to the net radiation flux of the earth surface and the vegetation coverage, and the calculation formula of the soil heat flux of the Chinese herbal medicine planting area is as follows:
。 （7）
wherein G is the soil heat flux of the planting area of the Chinese medicinal materials）；/>The surface net radiant flux of the Chinese medicinal material planting area is (/ -for Chinese medicinal materials>）；/>The soil heat flux under the condition of full vegetation coverage accounts for the proportion of net radiation, generally +.>=0.05；/>In general +.>=0.315；/>Is the vegetation coverage of the planting area of the traditional Chinese medicinal materials.
In step S3, according to the air temperature, the air humidity and the air pressure, the average saturated water vapor pressure, the actual average water vapor pressure, the saturated water vapor pressure temperature slope and the hygrometer constant in the planting area of the Chinese herbal medicine are calculated, which specifically comprises:
the saturated water vapor pressure was calculated from the air temperature.
And calculating the average saturated water vapor pressure in the measurement period according to the saturated water vapor pressure.
And calculating the actual average water vapor pressure according to the saturated water vapor pressure, the average saturated water vapor pressure and the average air humidity in the measurement period.
And calculating the saturated water vapor pressure temperature slope according to the air temperature and the saturated water vapor pressure.
And calculating a hygrometer constant according to the air pressure.
The saturated water vapor pressure is calculated as follows:
。 （8）
wherein,for air temperature->(K) Saturated water vapour pressure (kPa) under conditions.
The average saturated water vapor pressure is calculated as follows:
。 （9）
wherein,for measuring the average saturated water vapour pressure (kPa) over period T; />Is saturated water vapour pressure (kPa).
The actual average water vapor pressure is calculated as follows:
。 （10）
wherein,for air temperature->(K) Actual average water vapor pressure under conditions (kPa); />For measuring the average humidity during period T.
The calculation formula of the saturated water vapor pressure temperature slope is as follows:
。 （11）
wherein,is saturated water vapor pressure temperature slope (kPa/K); />Is the air temperature (K); />For air temperature->Saturated water vapour pressure (kPa) under conditions.
The hygrometer constant is calculated as follows:
。 （12）
wherein,is hygrometer constant (kPa/K); />Is the current air pressure (kPa).
Calculating the reference crop transpiration amount of the traditional Chinese medicine planting area according to the ground surface net radiation flux, the soil heat flux, the average saturated water vapor pressure, the actual average water vapor pressure, the saturated water vapor pressure temperature slope and the hygrometer constant of the traditional Chinese medicine planting area, wherein the calculation formula of the reference crop transpiration amount of the traditional Chinese medicine planting area is as follows:
。 （13）
wherein ET is 0 Transpiration (mm/day) of a reference crop in a planting area of the traditional Chinese medicinal materials;is the saturated water vapor pressure temperature slope;the surface net radiant flux of the Chinese medicinal material planting area is (/ -for Chinese medicinal materials>) The method comprises the steps of carrying out a first treatment on the surface of the G is the soil heat flux of the planting area of the Chinese medicinal materials (& lt/EN & gt)>）；/>Is hygrometer constant (kPa/K); />Wind speed (m/s) at a height of 2m from the ground; />For measuring the average saturated water vapor pressure in the period; />For air temperature->(K) Actual average water vapor pressure under conditions; />Is the air temperature (K).
In S4, the calculation formula of the dynamic crop coefficient is as follows:
。 （14）
wherein,is a dynamic crop coefficient; NDVI is the normalized vegetation index real-time value of the Chinese herbal medicine planting area.
According to the evaporation capacity of the reference crop and the dynamic crop coefficient, the crop transpiration capacity, the water demand and the latent heat flux in the traditional Chinese medicine planting area are calculated, and the method specifically comprises the following steps:
the crop transpiration calculation formula is as follows:
。 （15）
wherein,transpiration for crops (mm/day); />Is a dynamic crop coefficient; ET (electric T) 0 The transpiration quantity (mm/day) of the reference crop in the planting area of the traditional Chinese medicinal materials.
The calculation formula of the crop water demand is as follows:
。 （16）
wherein CWD is the water demand (mm/day) of crops in the planting area of the Chinese medicinal materials; RF is rainfall (mm/day) in the planting area of the Chinese medicinal materials;is the transpiration (mm/day) of crops.
The calculation formula of the latent heat flux is as follows:
。 （17）
wherein LE is the flux of latent heat）；/>Is the transpiration (mm/day) of crops.
The application provides a method for calculating soil moisture content parameters of traditional Chinese medicinal materials based on environmental light radiation, which simplifies the calculation process of the soil moisture content parameters and provides guiding advice for irrigation of the traditional Chinese medicinal materials. The application provides a calculation method based on dynamic crop growth coefficients, which provides references for the assessment of growth stages and growth conditions of traditional Chinese medicinal materials and calculation of soil moisture content parameters.
In the process of acquiring the environmental light radiation data, the application not only can acquire the NDVI for calculating the latent heat flux, but also can acquire other canopy vegetation indexes for evaluating the health condition of the traditional Chinese medicine, such as chlorophyll index, leaf spot index and the like.
The application also provides computer equipment, which comprises a memory and a processor, wherein the memory stores a computer program, and the computer program, when executed by the processor, causes the processor to execute the steps of the method for calculating the soil moisture content parameters of the traditional Chinese medicinal materials.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a computer device according to the present application. As shown in fig. 3, the computer device 1000 may include: processor 1001, network interface 1004, and memory 1005, in addition, computer device 1000 may further comprise: a user interface 1003, and at least one communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display (Display), a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface, among others. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (non-volatile memory), such as at least one disk memory. The memory 1005 may also optionally be at least one storage device located remotely from the processor 1001. As shown in fig. 3, an operating system, a network communication module, a user interface module, and a device control application may be included in the memory 1005, which is one type of computer storage medium.
In the computer device 1000 shown in FIG. 3, the network interface 1004 may provide network communication functions; while user interface 1003 is primarily used as an interface for providing input to a user; the processor 1001 may be used to call the device control application program stored in the memory 1005 to implement the method for calculating the soil moisture content parameter of the traditional Chinese medicinal materials according to the above embodiment, which will not be described herein.
The present application also provides a computer readable storage medium, in which a computer program is stored, where the computer program is suitable for being loaded by a processor and executing the method for calculating soil moisture content parameters of the traditional Chinese medicinal materials described in the foregoing embodiments, and details will not be repeated here.
The above-described program may be deployed to be executed on one computer device or on multiple computer devices that are deployed at one site or on multiple computer devices that are distributed across multiple sites and interconnected by a communication network, and the multiple computer devices that are distributed across multiple sites and interconnected by a communication network may constitute a blockchain network.
The computer readable storage medium may be an internal storage unit of the computer device, such as a hard disk or a memory of the computer device. The computer readable storage medium may also be an external storage device of the computer device, such as a plug-in hard disk, a smart card (SMC), a Secure Digital (SD) card, a flash memory card (flashcard), etc. which are provided on the computer device. Further, the computer-readable storage medium may also include both internal storage units and external storage devices of the computer device. The computer-readable storage medium is used to store the computer program and other programs and data required by the computer device. The computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The principles and embodiments of the present application have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present application and the core ideas thereof; also, it is within the scope of the present application to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the application.
Claims (10)
1. The method for calculating soil moisture content parameters of traditional Chinese medicinal materials is characterized by comprising the following steps of:
s1: calculating the surface net radiation flux of the Chinese medicinal material planting area according to the surface albedo, the total solar radiation flux, the atmospheric emissivity and the surface emissivity of the Chinese medicinal material planting area; the earth surface albedo is determined by the solar uplink short-wave radiation flux and the solar downlink short-wave radiation flux of the traditional Chinese medicinal material planting area; the total solar radiation flux is determined by the solar downlink short wave radiation flux of the traditional Chinese medicinal material planting area; the atmospheric emissivity is determined by the air temperature of the traditional Chinese medicine planting area; the earth surface emissivity is determined by vegetation coverage of the traditional Chinese medicine planting area; the vegetation coverage of the traditional Chinese medicine planting area is calculated by the real-time value of the normalized vegetation index of the traditional Chinese medicine planting area, the normalized vegetation index when the soil is completely uncovered and the normalized vegetation index when the vegetation is covered;
s2: calculating the soil heat flux of the traditional Chinese medicine planting area according to the surface net radiation flux and the vegetation coverage;
s3: calculating the reference crop transpiration of the traditional Chinese medicine planting area according to the surface net radiation flux, the soil heat flux, the air temperature, the air humidity and the air pressure of the traditional Chinese medicine planting area;
s4: calculating the dynamic crop coefficients of the traditional Chinese medicine planting areas according to the real-time values of the normalized vegetation indexes of the traditional Chinese medicine planting areas;
s5: calculating the crop transpiration of crops in the traditional Chinese medicine planting area according to the reference crop transpiration and the dynamic crop coefficient;
s6: calculating the water demand and the latent heat flux of crops in the traditional Chinese medicine planting area according to the transpiration of the reference crops; the crop transpiration quantity, the water demand and the latent heat flux form soil moisture content parameters.
2. The method for calculating soil moisture content parameters of Chinese medicinal materials according to claim 1, further comprising, before S1:
determining a normalized vegetation index when the soil is completely uncovered in the traditional Chinese medicine planting area according to the radiation flux parameter when the soil is completely uncovered in the traditional Chinese medicine planting area; the radiation flux parameters comprise the uplink and downlink radiation fluxes of the red wave band and the uplink and downlink radiation fluxes of the near infrared wave band;
and determining a normalized vegetation index when the full vegetation is covered in the traditional Chinese medicine planting area according to the radiation flux parameter when the full vegetation is covered in the traditional Chinese medicine planting area.
3. The method for calculating soil moisture content parameters of Chinese medicinal materials according to claim 1, wherein the vegetation coverage of the planting area of the Chinese medicinal materials is calculated according to the following formula:
；
wherein,vegetation coverage of the planting area of the traditional Chinese medicinal materials; NDVI is a real-time value of normalized vegetation index of the chinese herbal medicine planting area; NDVI s Normalized vegetation index when the soil is completely bare in the Chinese medicinal material planting area; NDVI v The normalized vegetation index is used for covering the whole vegetation in the planting area of the traditional Chinese medicinal materials.
4. The method for calculating soil moisture content parameters of Chinese medicinal materials according to claim 1, wherein the calculation formula of the surface net radiant flux of the Chinese medicinal material planting area is as follows:
；
wherein,the net radiation flux of the ground surface of the Chinese medicinal material planting area; />Is the earth surface albedo; />Is the total radiant flux of the sun;is the atmospheric emissivity; />Is the emissivity of the earth surface; />Is the boltzmann constant; />Is the air temperature.
5. The method for calculating soil moisture content parameters of Chinese medicinal materials according to claim 1, wherein the calculation formula of the soil heat flux of the Chinese medicinal material planting area is as follows:
；
wherein G is the soil heat flux of a Chinese medicinal material planting area;the net radiation flux of the ground surface of the Chinese medicinal material planting area; />Soil heat flux under the condition of full vegetation coverage accounts for the proportion of net radiation; />The soil heat flux under the bare soil condition accounts for the net radiation proportion;is the vegetation coverage of the planting area of the traditional Chinese medicinal materials.
6. The method for calculating soil moisture content parameters of Chinese medicinal materials according to claim 1, wherein S3 specifically comprises:
calculating saturated water vapor pressure according to the air temperature;
calculating average saturated water vapor pressure in a measurement period according to the saturated water vapor pressure;
calculating an actual average water vapor pressure according to the saturated water vapor pressure, the average saturated water vapor pressure and the average air humidity in the measurement period;
calculating a saturated water vapor pressure temperature slope according to the air temperature and the saturated water vapor pressure;
calculating a hygrometer constant according to the air pressure;
and calculating the reference crop transpiration quantity of the traditional Chinese medicine planting area according to the surface net radiation flux, the soil heat flux, the average saturated water vapor pressure, the actual average water vapor pressure, the saturated water vapor pressure temperature slope and the hygrometer constant of the traditional Chinese medicine planting area.
7. The method for calculating soil moisture content parameters of Chinese medicinal materials according to claim 1, wherein the calculation formula of the reference crop transpiration of the Chinese medicinal material planting area is as follows:
；
wherein ET is 0 Transpiration of reference crops in a traditional Chinese medicine planting area;is the saturated water vapor pressure temperature slope; />The net radiation flux of the ground surface of the Chinese medicinal material planting area; g is the soil heat flux of the Chinese medicinal material planting area; />Is hygrometer constant; />Wind speed at a height of 2m from the ground; />For measuring the average saturated water vapor pressure in the period; />Is the actual average water vapor pressure; />Is the air temperature.
8. The method for calculating soil moisture content parameters of Chinese medicinal materials according to claim 1, wherein the calculation formula of the water demand of crops in the planting area of the Chinese medicinal materials is as follows:
；
wherein CWD is the water demand of crops in the planting area of the Chinese medicinal materials; RF is rainfall in the Chinese medicinal material planting area;is the transpiration of crops.
9. A computer device comprising a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the method of any of claims 1-8.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program adapted to be loaded by a processor and to perform the method of any of claims 1-8.
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