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Agricultural drought rapid evaluation method based on historical cases

A case and historical technology, applied in the direction of instruments, data processing applications, calculations, etc., can solve the problems that the fragility curve has many restrictions on the applicable conditions and it is difficult to meet the environmental conditions

Inactive Publication Date: 2016-07-13
BEIJING NORMAL UNIVERSITY +1
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Problems solved by technology

However, because the causes of disasters are complex and diverse, it is difficult to construct an accurate hazard-affected body vulnerability curve based on a small number of disaster factors. environmental conditions

Method used

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  • Agricultural drought rapid evaluation method based on historical cases
  • Agricultural drought rapid evaluation method based on historical cases
  • Agricultural drought rapid evaluation method based on historical cases

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Embodiment Construction

[0073] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0074] This case collects data related to agricultural drought in Henan Province from 2001 to 2013. Taking the data from 2001 to 2005 as the base of the historical case, two years, 2007 and 2013, are randomly selected from the data from 2006 to 2013 for historical analysis. For the research on disaster assessment methods of similar cases, see Table 1 for the data information used. Henan is located in the central and eastern part of China, with the middle and lower reaches of the Yellow River. The terrain is high in the west and low in the east. It is mainly composed of plains and basins. It straddles the four major water systems of the Haihe River, the Yellow River, the Huaihe River and the Yangtze River. issued by the province. During the period from 1971 to 2013, the average annual area of ​​disaster-affected crops, disaster-affected crops ...

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Abstract

The invention discloses an agricultural drought rapid evaluation method based on historical cases. The method comprises the following steps: 1, constructing a drought disaster historical case database; 2, selecting disaster condition indexes and disaster indexes; 3, selecting a similar case determining method and calculating similarities between the historical cases and a current disaster; 4, participating in determination of a disaster condition evaluation case and calculating a weight; 5, determining a disaster fighting capability correction coefficient and a disaster bearer exposure quantity correction coefficient; and 6, based on a case similarity evaluation model, calculating a disaster condition of the current disaster. The method is simple, the operation is easy, pre-evaluation based on historical similar cases can be completed even if there are only a small quantity of cases, the method is applied to pre-evaluation in which there are no conditions yet for establishing a model, the real-time performance is quite high, loss evaluation data of the disaster condition can be provided at any periods of the disaster, and references are provided for disaster fighting and disaster rescue decision-making.

Description

technical field [0001] The invention relates to a method for quickly evaluating natural disasters based on historical disaster case data through a similarity evaluation model, in particular to a method for quickly evaluating agricultural drought disasters based on historical cases. Background technique [0002] Drought is one of the most common agricultural natural disasters in the world. It has the characteristics of large impact range, long duration and high frequency of occurrence. The agricultural drought disaster assessment work can be divided into three stages according to the disaster evolution process: pre-disaster pre-assessment, disaster follow-up assessment (monitoring assessment) and post-disaster loss assessment. The main contents include drought risk, intensity, scale, development trend and loss assessment . Loss assessment is disaster assessment, which is mainly a quantitative assessment of the affected area, disaster-prone area and crop failure area of ​​cro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/02
Inventor 朱秀芳夏兴生潘耀忠王薇李苓苓温奇
Owner BEIJING NORMAL UNIVERSITY
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