Crop disaster situation loss assessment method based on remote-sensing sampling

A technology of crops and disasters, which is applied in the field of crop disaster loss assessment based on remote sensing sampling, and can solve problems such as consistency comparison

Inactive Publication Date: 2015-09-02
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0008] Previous studies often only focused on the magnitude of the NDVI pre-disaster and post-disaster changes, and divided the disaster levels according to the NDVI pre-disaster and post-disaster changes, without linking it to the actual degree of crop yield reduction. Relative severity helps somewhat, but is difficult to make consistent comparisons between different study areas and for different crops

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  • Crop disaster situation loss assessment method based on remote-sensing sampling
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  • Crop disaster situation loss assessment method based on remote-sensing sampling

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Embodiment Construction

[0046] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.

[0047] The research area of ​​the present invention is Xuchang City, Henan Province. Henan Province is located in the hinterland of the Central Plains, in the marginal area where the warm temperate zone and subtropical climate intersect. The monsoon climate is obvious, and multiple natural disasters such as drought, flood, sandstorm, hail and frost occur frequently. A severe drought occurred in Henan Province from July to August 2014. Through the comprehensive analysis of the NDVI anomaly index in August 2014 and the NDVI difference between August 20, 2014 and July 26, 2014 in Xuchang City, Henan Province, the Xuchang Dazhao Village and Beisun Village in Xiangcheng County are the research areas. The selection of the research area mainly considers the following two reasons: First, in order to ensure the verification accuracy of the empirical re...

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Abstract

The invention discloses a crop disaster situation loss assessment method based on remote-sensing sampling, which comprises the steps of: (1) acquiring remote-sensing data and pre-processing the remote-sensing data; (2) designing a remote-sensing sampling scheme; (3) investigating disaster situation of a sampled quadrat; (4) and estimating total area of affected crops and affected crop area of each grade, and carrying out precision analysis and assessment. The crop disaster situation loss assessment method based on remote-sensing sampling is high in efficiency of disaster situation loss assessment at low investigation cost, and can provide a basis for the comparison of disaster situation degrees between different disaster types and different regions.

Description

technical field [0001] The invention relates to an efficient sampling method for establishing a sampling population and a sampling frame based on remote sensing images of pre-disaster and post-disaster situations, and designing layered system sampling auxiliary variables to realize crop disaster assessment, specifically a crop disaster situation based on remote sensing sampling Methods of damage assessment. Background technique [0002] my country is a large agricultural country, and agriculture is the foundation of our national economy, which is related to national security and social stability. Natural disasters in my country, especially agricultural disasters, occur frequently and are serious. As an important means of agricultural risk management and the national agricultural support and protection system, agricultural insurance is of great significance to improving agricultural anti-risk capabilities, promoting agricultural industrialization, and ensuring food production...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/02
Inventor 朱秀芳蔡毅潘耀忠
Owner BEIJING NORMAL UNIVERSITY
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