Winter wheat meteorological disaster comprehensive risk dynamic evaluation method and device

Abstract

The invention discloses a winter wheat meteorological disaster comprehensive risk dynamic evaluation method and device. In order to reduce the meteorological disaster risk of winter wheat is reduced,the whole growth stage of the winter wheat and meteorological disasters influencing the development and growth of the winter wheat are integrated, dynamic data are observed in combination with a regional automatic meteorological station, a comprehensive risk evaluation model is used as a basis, and the comprehensive risk dynamic evaluation of the main meteorological disasters of the winter wheat is realized; the accuracy and the dynamic property of risk evaluation are improved; disaster occurrence of winter wheat can be accurately early warned in advance. the transition from coping with a single disaster to comprehensive disaster reduction and the transition from the single disaster type to the comprehensive disaster reduction are realized; the disaster loss is reduced and the disaster risk is reduced; for induced factors, comprehensive risk assessment, hazard influence benefits and comprehensive integrated quantitative comparison of multi-disaster combinations at different time periods, dynamic quantitative risk assessment based on a crop growth mechanism and a disaster formation mechanism is realized, and an assessment result can meet the actual needs of meteorological disaster early warning and disaster prevention and reduction work.

Description

technical field [0001] The present disclosure relates to the fields of plant growth environment risk assessment and agricultural production risk assessment, in particular to a method and device for dynamic comprehensive risk assessment of winter wheat meteorological disasters. Background technique [0002] Winter wheat is mainly planted in North China, where meteorological disasters occur frequently. The growth period of winter wheat coincides with the dry winter and spring season in North China. Drought, dry hot wind, cold spring and other meteorological disasters affect the growth and harvest of winter wheat, resulting in reduced grain production. The current risk assessment methods mainly have the following two problems. (1) The crop risk assessment technology for a single disaster has been quite mature and widely used. However, crops will be threatened by various meteorological disasters throughout the development period, and there are significant differences in the tole...

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Problems solved by technology

It can be seen that the inducing factors, comprehensive risk assessment, hazard impact benefit, etc. for different periods of multi-hazard combinations have not been effectively resolved.

(2) The current risk assessment of agricultural meteorological disasters is still mainly based on static assessment, lacking dynamic quantitative risk assessment based on crop growth mechanism and disaster formation mechanism, and the assessment results cannot meet the actual needs of meteorological disaster early warning and disaster prevention and mitigation

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