CN114545527A - Method for forecasting weather suitability of farming activities - Google Patents
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- CN114545527A CN114545527A CN202210082943.8A CN202210082943A CN114545527A CN 114545527 A CN114545527 A CN 114545527A CN 202210082943 A CN202210082943 A CN 202210082943A CN 114545527 A CN114545527 A CN 114545527A
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- G01W—METEOROLOGY
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Abstract
The invention discloses a method for forecasting the weather suitability of farming activities, which comprises the following steps: acquiring meteorological data and acquiring meteorological forecast information; judging the weather suitability of the farming activities according to the acquired weather forecast information; broadcasting the weather suitability of the farming activities. The method for forecasting the weather suitability of the farming activity can scientifically and finely forecast the weather suitability of the farming activity.
Description
Technical Field
The invention belongs to the field of agricultural weather service, and particularly relates to a method for forecasting weather suitability of farming activities.
Background
China is a big agricultural country, and weather is agricultural service and is the primary task of applying weather service. The meteorological conditions have objective and obvious influence on the growth of crops, the farming activities and the benefits of agricultural production. In recent years, research and application work of relevant agricultural weather services are developed in various ways by combining local agricultural planting characteristics and actual production requirements. The agricultural weather forecast service business is widely developed, and the basic idea is to study the influence of weather on agriculture, determine influence factors and judgment indexes, establish a weather influence evaluation model, bring weather actual conditions and forecast data into the model, and obtain the estimated result of the suitability of future weather conditions on agricultural production and farming activities.
The existing agricultural activity weather suitability forecasting method is limited in application range, most of the current researches are to establish a judgment index or model based on local observation and forecasting data by combining local agricultural planting characteristics, and a standard and scientific agricultural activity weather suitability forecasting method with strong universality is lacked.
Disclosure of Invention
A farming activity weather suitability forecasting method comprises the following steps:
acquiring meteorological data and acquiring meteorological forecast information;
judging the weather suitability of the farming activities according to the acquired weather forecast information;
and broadcasting the weather suitability of the farming activities.
The farming activities comprise spraying, airing and fertilizing, and the judgment basis of the spraying weather suitability comprises precipitation, wind, the highest air temperature and fog; the judgment basis of the weather suitability for airing comprises the hourly highest temperature, the hourly relative humidity, the hourly average wind speed grade and the hourly cloud cover; the judgment basis of the fertilization weather suitability comprises soil humidity, precipitation, air temperature and wind; the weather suitability for spraying and drying comprises suitability, unsuitability and extremely unsuitability, and the weather suitability for fertilizing comprises suitability, suitability and unsuitability.
Further, the relation between the spraying weather suitability and the judgment index is as follows:
when the judgment index is 0, the spraying weather suitability is extremely unsuitable,
when the judgment index is more than 0 and less than or equal to 5, the spraying weather suitability is not suitable,
when the judgment index is more than 5 and less than or equal to 7, the spraying weather suitability is more suitable,
when the judgment index is more than 7 and less than or equal to 10, the spraying weather suitability is proper;
judgment index of 10 ═ X (X)Rain water*XWind power*XHighest point of the designAir temperature*XFog mist)，
XRain waterAs an index of precipitation, XRain waterThe precipitation amount R is 12h12hAccording to XRain waterThe relation between the precipitation amount and 12h is as follows:
R12hwhen equal to 0, XRain water＝1，
0.1mm≤R12h<At 2.5mm, XRain water＝0.7，
2.5mm≤R12h<At 5mm, XRain water＝0.5，
R12When not less than 5mm, XRain water＝0；
XWind (W)As an index of wind speed, XWind powerBased on the wind speed class, XWind powerThe relationship with the wind speed rating is:
when the wind speed grade is less than or equal to 3 grades, XWind power＝1，
When the wind speed grade is more than 3 grade and less than 5 grade, XWind power＝0.5，
When the wind speed grade is more than or equal to 5 grades, XWind power＝0；
XMaximum air temperatureIs an index of air temperature, XMaximum air temperatureBased on the daily maximum temperature, XMaximum air temperatureThe relationship with the daily maximum temperature is:
when the daily maximum temperature is less than or equal to 33 ℃, XMaximum air temperature＝1，
33℃<When the daily maximum temperature is less than or equal to 35 ℃, XMaximum air temperature＝0.7，
35℃<When the daily maximum temperature is less than or equal to 37 ℃, XMaximum air temperature＝0.5，
When the daily maximum temperature is higher than 37 ℃, XMaximum air temperature＝0；
XFog mistAs fog index, when there is no dense fog, XFog mistWhen dense fog is present, X is 1Fog mist＝0。
Further, the weather-drying suitability is judged by taking hourly evaporation capacity as a judgment index, and the relation between the weather-drying suitability and the hourly evaporation capacity is as follows:
the hourly evaporation capacity is more than or equal to 3 in winter, more than or equal to 9 in summer, more than or equal to 7 in spring and autumn, and the weather suitability for airing is proper,
the hourly evaporation capacity is more than or equal to 1.3 and less than or equal to 2.9 in winter, the hourly evaporation capacity is more than or equal to 5.6 and less than or equal to 8.9 in summer, the hourly evaporation capacity is more than or equal to 3.1 and less than or equal to 6.9 in spring and autumn, and the weather suitability for airing is more appropriate,
the hourly evaporation in winter is less than or equal to 1.2, the hourly evaporation in summer is less than or equal to 5.5, the hourly evaporation in spring and autumn is less than or equal to 3, and the weather suitability for airing is not suitable,
when the precipitation or wind speed grade is more than or equal to 6, the weather drying suitability is extremely unsuitable;
the method comprises the steps of analyzing the climate of each site according to seasonal distribution differences of different regions, dividing the climate seasons, and dynamically selecting the relation between hourly evaporation capacity and weather drying suitability. The weather season division is based on the weather industry standard QX/T152-.
Wherein the hourly evaporation rate is 43.5+0.259X1-0.983X2+0.583X3+1.642X4，
X1To hourly maximum temperature, X2To hourly relative humidity, X3To average wind speed rating hourly, X4Is an hourly cloud index, wherein when the hourly cloud index is less than or equal to 10 percent, X is4When the hourly cloud content is less than or equal to 80 percent and is 4 and 10 percent, X4When the hourly cloud is > 80%, X is 34＝2。
Further, the judgment basis of the fertilization weather suitability is as follows: soil humidity index, precipitation index, temperature index and wind index,
the relation between the weather suitability of the fertilization and the judgment basis is as follows:
when at least one of the soil humidity index, the precipitation index, the air temperature index and the wind index is 0, the fertilizing weather suitability is not suitable,
when the sum of the soil humidity index, the precipitation index, the air temperature index and the wind index is more than or equal to 7, the fertilizing weather suitability is proper,
when the soil humidity index, the precipitation index, the temperature index and the wind index are not 0 and are less than 7, the fertilizing meteorological suitability is more suitable;
wherein, the judgment standard of the soil humidity index is as follows:
when the accumulated precipitation is less than or equal to 25mm in the past 48h or less than or equal to 10mm in the past 24h, the soil humidity index is 2,
when the accumulated precipitation is more than or equal to 50mm in the past 48h or more than or equal to 25mm in the past 24h, the soil humidity index is 0,
when the accumulated precipitation is less than 50mm in the past 48 hours and the precipitation is less than 25mm in the past 24 hours after the accumulated precipitation is less than 25mm in the past 25mm is less than 25mm, the soil humidity index is 1;
the judgment standard of the precipitation index is as follows:
when the precipitation is less than or equal to 5mm in 3 days in the future, the precipitation index is 2,
when the precipitation is more than or equal to 25mm in any day in the future of 3 days or the precipitation is more than or equal to 10mm in a single hour in the future of 24 hours, the precipitation index is 0,
the precipitation amount of any day is less than 25mm when the precipitation amount is less than 5mm and less than 3 days in the future, and the precipitation amount index is 1 when the precipitation amount of a single hour is less than 10mm in 24 hours in the future;
the judgment standard of the temperature index is as follows:
when the average temperature is less than or equal to 23 ℃ within 24 hours in the future at the temperature of 10 ℃ or more, the temperature index is 2,
when the average air temperature in the future 24h is less than 10 ℃, or the average air temperature in the future 24h is more than or equal to 28 ℃, or the difference between the average air temperature in the future 24h and the average air temperature in ten days is less than or equal to minus 6 ℃, the air temperature index is 0,
when the average air temperature is more than 23 ℃ and less than 28 ℃ in the future 24h and the difference between the average air temperature in the future 24h and the average air temperature in the ten days is-6 ℃, the air temperature index is 1;
the judgment standard of the wind index is as follows:
when the wind speed grade is less than or equal to 3 grade in 24h in the future, the wind index is 2,
when the wind speed grade is more than or equal to 5 grade in the future 24h, the wind index is 0,
when the wind speed grade is less than 3 grades and less than 24h in the future, the wind index is 1.
Compared with the prior art, the invention has the advantages that: the method for forecasting the weather suitability of the farming activity can accurately and comprehensively forecast the weather suitability of the farming activity and obtain weather forecast information according to the acquired weather data, wherein the weather suitability forecasting of pesticide spraying and fertilizer application is carried out on a daily basis, the weather suitability forecasting of airing is carried out on an hourly basis, the weather suitability forecasting can be carried out more accurately, people can be guided and helped to select and utilize the best airing opportunity, life and production plans are reasonably arranged, the risk prevention capability of the agricultural weather disasters is improved, and the agricultural weather service capability is enhanced.
Detailed Description
Examples
A farming activity weather suitability forecasting method comprises the following steps:
acquiring meteorological data and acquiring meteorological forecast information;
judging the weather suitability of the farming activities according to the acquired weather forecast information;
broadcasting the weather suitability of the farming activities.
The farming activities comprise spraying, airing and fertilizing, and the judgment basis of the spraying weather suitability comprises precipitation, wind, the highest air temperature and fog; the judgment basis of the weather suitability for airing comprises the hourly highest temperature, the hourly relative humidity, the hourly average wind speed grade and the hourly cloud cover; the judgment basis of the fertilization weather suitability comprises soil humidity, precipitation, air temperature and wind; the spraying and airing suitability degree comprises suitability, more suitability, unsuitability and extremely unsuitability, and the fertilizing weather suitability degree comprises suitability, more suitability and unsuitability.
Optionally, the relation between the spraying weather suitability and the judgment index is as follows:
when the judgment index is 0, the spraying weather suitability is extremely unsuitable,
when the judgment index is more than 0 and less than or equal to 5, the spraying weather suitability is not suitable,
when the judgment index is more than 5 and less than or equal to 7, the spraying weather suitability is more suitable,
when the judgment index is more than 7 and less than or equal to 10, the spraying weather suitability is proper;
judgment index of 10 ═ X (X)Rain water*XWind power*XMaximum air temperature*XFog mist)，
XRain waterAs an index of precipitation, XRain waterThe precipitation amount R is 12h12hFor this reason, when there is no rainfall or only a trace amount of rainfall, there is no influence on the field spraying activity, and the stronger the rainfall intensity is, the less suitable is the spraying because the rainfall will dilute the concentration of the drug and reduce the drug effect. Thus, XRain waterThe relation between the precipitation amount and 12h is as follows:
R12hwhen equal to 0, XRain water＝1，
0.1mm≤R12h<At 2.5mm, XRain water＝0.7，
2.5mm≤R12h<At 5mm, XRain water＝0.5，
R12When not less than 5mm, XRain water＝0；
XWind powerAs an index of wind speed, XWind powerBased on the wind speed grade as the basis,
when the pesticide is applied, the pesticide can be blown away in windless or breezy days, the volatilization speed is accelerated, the pesticide effect time is shortened, and the pesticide killing effect is influenced. Thus, XWind powerThe relationship with the wind speed rating is:
when the wind speed grade is less than or equal to 3 grades, XWind power＝1，
When the wind speed grade is more than 3 grade and less than 5 grade, XWind power＝0.5，
When the wind speed grade is more than or equal to 5 grades, XWind power＝0；
XMaximum air temperatureIs an index of air temperature, XMaximum air temperatureThe pesticide effect of the pesticide can be improved under the condition of higher temperature within a certain temperature range by taking the highest daily temperature as the basis. However, when the temperature is too high to exceed a certain range, the drug effect is reduced, because the too high temperature can accelerate the volatilization of the drug and shorten the durability of the drug effect, and in addition, the metabolism of a drug sprayer is accelerated in the weather of too high temperature, which is easy to cause inhalation poisoning.
XMaximum air temperatureThe relationship with the daily maximum temperature is:
when the daily maximum temperature is less than or equal to 33 ℃, XMaximum air temperature＝1，
33℃<When the daily maximum temperature is less than or equal to 35 ℃, XMaximum air temperature＝0.7，
35℃<The daily maximum temperature is less than or equal to 37 DEG CWhen, XMaximum air temperature＝0.5，
When the daily maximum temperature is higher than 37 ℃, XMaximum air temperature＝0；
XFog mistWhen applied in mist, the agent concentration is diluted and the drug effect is reduced. Thus, in the absence of dense fog, XFog mistWhen dense fog is present, X is 1Fog mist＝0。
Optionally, the weather suitability for airing is judged by taking hourly evaporation capacity as a judgment index, and since the evaporation capacity is closely related to seasons, the weather suitability for airing is divided according to seasons, and the relationship between the weather suitability for airing and the hourly evaporation capacity is as follows:
the hourly evaporation capacity is more than or equal to 3 in winter, more than or equal to 9 in summer, more than or equal to 7 in spring and autumn, and the weather suitability for airing is proper,
the hourly evaporation capacity is more than or equal to 1.3 and less than or equal to 2.9 in winter, the hourly evaporation capacity is more than or equal to 5.6 and less than or equal to 8.9 in summer, the hourly evaporation capacity is more than or equal to 3.1 and less than or equal to 6.9 in spring and autumn, and the weather suitability for airing is more appropriate,
the hourly evaporation in winter is less than or equal to 1.2, the hourly evaporation in summer is less than or equal to 5.5, the hourly evaporation in spring and autumn is less than or equal to 3, and the weather suitability for airing is not suitable,
when precipitation exists or the wind speed grade is more than or equal to 6, the weather drying suitability is extremely unsuitable;
due to the fact that the seasonal distribution difference of different regions is large, climate analysis is conducted on more than 2000 sites in the country, and the relation between hourly evaporation capacity and weather drying suitability is dynamically selected. The weather season division is based on the weather industry standard QX/T152-.
Wherein the hourly evaporation rate is 43.5+0.259X1-0.983X2+0.583X3+1.642X4，
X1To hourly maximum temperature, X2To hourly relative humidity, X3To average wind speed class hour by hour, X4Is an hourly cloud index, wherein when the hourly cloud index is less than or equal to 10 percent, X is4When the hourly cloud content is less than or equal to 80 percent and is 4 and 10 percent, X4When the hourly cloud is greater than 80%, (3)，X4＝2。
Optionally, the judgment basis of the fertilization weather suitability is as follows: soil humidity index, precipitation index, temperature index and wind index,
the relation between the fertilization weather suitability and the judgment reference is as follows:
when at least one of the soil humidity index, the precipitation index, the air temperature index and the wind index is 0, the fertilizing weather suitability is not suitable,
when the sum of the soil humidity index, the precipitation index, the air temperature index and the wind index is more than or equal to 7, the fertilizing weather suitability is proper,
when the soil humidity index, the precipitation index, the temperature index and the wind index are not 0 and are less than 7, the fertilizing meteorological suitability is more suitable;
the fertilizer application of the crops needs certain soil humidity, if the crops are too dry, the fertilizer efficiency can not be exerted, the soil air permeability can be influenced by over-wetting, the absorption of the crops to nutrients is not facilitated, and nutrient loss can also be caused, so that precipitation preferably occurs two days before the fertilizer application, but the precipitation can not be too large.
Therefore, the soil humidity index is determined by the following criteria:
when the accumulated precipitation is less than or equal to 25mm in the past 48h or less than or equal to 10mm in the past 24h, the soil humidity index is 2,
when the accumulated precipitation is more than or equal to 50mm in the past 48h or more than or equal to 25mm in the past 24h, the soil humidity index is 0,
when the accumulated precipitation is less than 50mm in the past 48 hours and the precipitation is less than 25mm in the past 24 hours after the accumulated precipitation is less than 25mm in the past 25mm is less than 25mm, the soil humidity index is 1;
after fertilization, the precipitation is too large in a short time, runoff is formed, and the loss of fertilizer water is caused, so that strong rainfall cannot occur on the same day or two days in the future or short-term strong rainfall cannot occur on the fertilization.
Therefore, the criterion of the precipitation indicator is:
when the precipitation is less than or equal to 5mm in 3 days in the future, the precipitation index is 2,
when the precipitation is more than or equal to 25mm in any day in the future of 3 days or the precipitation is more than or equal to 10mm in a single hour in the future of 24 hours, the precipitation index is 0,
when the precipitation is less than 25mm in any day for 3 days in the future when the thickness is less than 5mm, the precipitation index is 1;
the temperature is high, which causes the decomposition of some ammoniacal nitrogen fertilizers to be accelerated, and the ammoniacal nitrogen fertilizers are easy to lose, and the absorption and utilization of the fertilizers are affected when the temperature is too low, so that the temperature after fertilization and fertilization is proper, and the temperature is obviously lower than the same-period value throughout the year or the average temperature is too high, which is not suitable for fertilization.
The judgment standard of the temperature index is as follows:
when the average temperature is less than or equal to 23 ℃ within 24 hours in the future at the temperature of 10 ℃ or more, the temperature index is 2,
when the average air temperature in the future 24h is less than 10 ℃, or the average air temperature in the future 24h is more than or equal to 28 ℃, or the difference between the average air temperature in the future 24h and the average air temperature in ten days is less than or equal to minus 6 ℃, the air temperature index is 0,
when the average temperature is less than 28 ℃ for 24 hours in the future at 23 ℃ and less, the temperature index is 1;
in windy weather, the fertilizer can be blown away along with wind, so that the fertilizer is not applied in place or is not uniformly applied, meanwhile, the fertilizer volatilization can be accelerated to cause waste and environmental pollution, and the effect is reduced, so that the fertilizer is generally suitable for being applied in windless or breezy weather.
The judgment standard of the wind index is as follows:
when the wind speed grade is less than or equal to 3 grade in 24h in the future, the wind index is 2,
when the wind speed grade is more than or equal to 5 grade in the future 24h, the wind index is 0,
when the wind speed grade is less than 3 grades and less than 24h in the future, the wind index is 1.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (4)
1. A farming activity weather suitability forecasting method is characterized by comprising the following steps:
acquiring meteorological data and acquiring meteorological forecast information;
judging the weather suitability of the farming activities according to the acquired weather forecast information;
broadcasting the weather suitability of the farming activities;
the farming activities comprise spraying, airing and fertilizing, and the judgment basis of the spraying weather suitability comprises precipitation, wind, the highest air temperature and fog; the judgment basis of the weather suitability for airing comprises the hourly highest temperature, the hourly relative humidity, the hourly average wind speed grade and the hourly cloud cover; the judgment basis of the fertilization weather suitability comprises soil humidity, precipitation, air temperature and wind; the weather suitability for spraying and drying comprises suitability, unsuitability and extremely unsuitability, and the weather suitability for fertilizing comprises suitability, suitability and unsuitability.
2. The method for forecasting weather suitability for farming activities according to claim 1, wherein the weather suitability for sunning is judged by using hourly evaporation as a judgment index, and the relation between the weather suitability for sunning and the hourly evaporation is as follows:
the hourly evaporation capacity is more than or equal to 3 in winter, the hourly evaporation capacity is more than or equal to 9 in summer, the hourly evaporation capacity is more than or equal to 7 in spring and autumn, and the weather suitability for airing is proper,
the hourly evaporation capacity is more than or equal to 1.3 and less than or equal to 2.9 in winter, the hourly evaporation capacity is more than or equal to 5.6 and less than or equal to 8.9 in summer, the hourly evaporation capacity is more than or equal to 3.1 and less than or equal to 6.9 in spring and autumn, and the weather suitability for airing is more appropriate,
the hourly evaporation capacity is less than or equal to 1.2 in winter, less than or equal to 5.5 in summer, less than or equal to 3 in spring and autumn, and the weather suitability for airing is not suitable,
when precipitation exists or the wind speed grade is more than or equal to 6, the weather drying suitability is extremely unsuitable;
wherein the hourly evaporation rate is 43.5+0.259X1-0.983X2+0.583X3+1.642X4，
X1To hourly maximum temperature, X2To hourly relative humidity, X3To average wind speed rating hourly, X4To be made intoAn hour cloud index, wherein when the hourly cloud is less than or equal to 10 percent, X4When the hourly cloud content is less than or equal to 80 percent and is 4 and 10 percent, X4When the hourly cloud is > 80%, X is 34＝2，
The method comprises the steps of analyzing the climate of each site according to seasonal distribution differences of different regions, dividing the climate seasons, and dynamically selecting the relation between hourly evaporation capacity and weather drying suitability.
3. The weather suitability forecasting method for farming activities according to claim 1, wherein the relation between the spraying weather suitability and the judgment index is as follows:
when the judgment index is 0, the spraying weather suitability is extremely unsuitable,
when the judgment index is more than 0 and less than or equal to 5, the spraying weather suitability is not suitable,
when the judgment index is more than 5 and less than or equal to 7, the spraying weather suitability is more suitable,
when the judgment index is more than 7 and less than or equal to 10, the spraying weather suitability is proper;
wherein the judgment index is 10 ═ X (X)Rain water*XWind power*XMaximum air temperature*XFog mist)，
XRain waterAs an index of precipitation, XRain waterThe precipitation amount R is 12h12hAccording to XRain waterThe precipitation amount R is equal to 12h12hThe relationship between them is:
R12hwhen equal to 0, XRain water＝1，
0.1mm≤R12h<At 2.5mm, XRain＝0.7，
2.5mm≤R12h<At 5mm, XRain water＝0.5，
R12When not less than 5mm, XRain＝0；
XWind powerAs an index of wind speed, XWind powerBased on the wind speed class, XWind powerThe relationship with the wind speed rating is:
when the wind speed grade is less than or equal to 3 grades, XWind (W)＝1，
When the wind speed grade is more than 3 grade and less than 5 grade, XWind power＝0.5，
When the wind speed grade is more than or equal to 5 grades, XWind power＝0；
XMaximum air temperatureIs an index of air temperature, XMaximum air temperatureBased on the daily maximum temperature, XMaximum air temperatureThe relationship with the daily maximum temperature is:
when the daily maximum temperature is less than or equal to 33 ℃, XMaximum air temperature＝1，
33℃<When the daily maximum temperature is less than or equal to 35 ℃, XMaximum air temperature＝0.7，
35℃<When the daily maximum temperature is less than or equal to 37 ℃, XMaximum air temperature＝0.5，
When the daily maximum temperature is higher than 37 ℃, XMaximum air temperature＝0；
XFog mistAs fog index, when there is no dense fog, XFog mistWhen dense fog is present, X is 1Fog mist＝0。
4. The method for forecasting weather suitability for farming activities according to claim 1, wherein the judgment of the weather suitability for fertilization is based on: soil humidity index, precipitation index, temperature index and wind index,
the relation between the weather suitability of the fertilization and the judgment basis is as follows:
when at least one of the soil humidity index, the precipitation index, the temperature index and the wind index is 0, the fertilization weather suitability is not suitable,
when the sum of the soil humidity index, the precipitation index, the air temperature index and the wind index is more than or equal to 7, the fertilizing weather suitability is proper,
when the soil humidity index, the precipitation index, the temperature index and the wind index are not 0 and are less than 7, the fertilizing meteorological suitability is more suitable;
wherein, the judgment standard of the soil humidity index is as follows:
when the accumulated precipitation is less than or equal to 25mm in the past 48h or less than or equal to 10mm in the past 24h, the soil humidity index is 2,
when the accumulated precipitation is more than or equal to 50mm in the past 48h or more than or equal to 25mm in the past 24h, the soil humidity index is 0,
when the accumulated precipitation is less than 50mm in the past 48 hours and the precipitation is less than 25mm in the past 24 hours after the accumulated precipitation is less than 25mm in the past 25mm is less than 25mm, the soil humidity index is 1;
the judgment standard of the precipitation index is as follows:
when the precipitation is less than or equal to 5mm in 3 days in the future, the precipitation index is 2,
when the precipitation is more than or equal to 25mm in any day in the future of 3 days or the precipitation is more than or equal to 10mm in a single hour in the future of 24 hours, the precipitation index is 0,
when the precipitation is less than 25mm in any day in 3 days in the future when the 5mm is less than 3 days in the future, and the precipitation is less than 10mm in a single hour in 24 hours in the future, the precipitation index is 1;
the judgment standard of the temperature index is as follows:
when the average temperature is less than or equal to 23 ℃ within 24 hours in the future at the temperature of 10 ℃ or more, the temperature index is 2,
when the average air temperature in the future 24h is less than 10 ℃, or the average air temperature in the future 24h is more than or equal to 28 ℃, or the difference between the average air temperature in the future 24h and the average air temperature in ten days is less than or equal to minus 6 ℃, the air temperature index is 0,
when the average air temperature is more than 23 ℃ and less than 28 ℃ in the future 24h and the difference between the average air temperature in the future 24h and the average air temperature in the ten days is-6 ℃, the air temperature index is 1;
the judgment standard of the wind index is as follows:
when the wind speed grade is less than or equal to 3 grade in 24h in the future, the wind index is 2,
when the wind speed grade is more than or equal to 5 grade in the future 24h, the wind index is 0,
when the wind speed grade is less than 3 grades and less than 24h in the future, the wind index is 1.
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| CN117094470A (en) * | 2023-09-14 | 2023-11-21 | 广东省气象服务中心(广东气象影视宣传中心) | Construction suitability weather forecast method for concrete operation scene of building site |
| CN117094470B (en) * | 2023-09-14 | 2024-05-10 | 广东省气象服务中心(广东气象影视宣传中心) | Construction suitability weather forecast method for concrete operation scene of building site |
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| CN117094470A (en) * | 2023-09-14 | 2023-11-21 | 广东省气象服务中心(广东气象影视宣传中心) | Construction suitability weather forecast method for concrete operation scene of building site |
| CN117094470B (en) * | 2023-09-14 | 2024-05-10 | 广东省气象服务中心(广东气象影视宣传中心) | Construction suitability weather forecast method for concrete operation scene of building site |
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