Agricultural drought disaster-inducing factor risk assessment method

A disaster-causing factor and dangerous technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve the problems of unclear physical meaning, weak indication of agricultural drought, low accuracy of agricultural drought risk assessment and loss assessment and other issues to achieve the effect of expanding the scope of application and avoiding limitations

Inactive Publication Date: 2013-12-11
MIN OF CIVIL AFFAIRS NAT DISASTER REDUCTION CENT
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Problems solved by technology

[0003] In the existing technology, the research on the risk of agricultural drought disaster-causing factors usually uses simple meteorological indicators to measure its intensity and spatial scope, which often have deficiencies such as unclear physical meaning and weak indication of agricultural drought, which leads to the risk of agricultural drought. Issues such as low accuracy of assessment and damage assessment

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  • Agricultural drought disaster-inducing factor risk assessment method
  • Agricultural drought disaster-inducing factor risk assessment method
  • Agricultural drought disaster-inducing factor risk assessment method

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Embodiment Construction

[0038] The specific implementation manner of the present invention will be further described below in conjunction with the drawings and embodiments. The following examples are only used to illustrate the present invention, but not to limit the scope of the present invention.

[0039] Fundamentally, the main cause of agricultural drought is damage to crops and agricultural resources due to insufficient water. Therefore, the work of studying the hazards of disaster-causing factors should be carried out from the aspects of precipitation process, surface water system, and crop growth. The present invention is based on real-time daily precipitation data and environmental disaster reduction satellite data, and comprehensively uses parameters such as precipitation deficit rate, surface water deficit rate, and normalized vegetation index to construct an agricultural drought disaster-causing factor risk index. An efficient measure of drought hazard hazard. Combine below figure 1 The...

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Abstract

The invention relates to the technical field of application of satellite remote sensing to disaster reduction, and in particular relates to an agricultural drought disaster-inducing factor risk assessment method based on real-time daily precipitation and environmental disaster-reduction satellite data. The agricultural drought disaster-inducing factor risk assessment method is based on real-time daily precipitation and environmental disaster-reduction satellite, and mainly comprises the steps of 1: calculating a precipitation deficit rate according to the real-time daily precipitation; 2: according to environmental disaster-reduction satellite multi-spectral data, calculating a ground water deficit rate; 3: calculating a normalized differential vegetation index according to the environmental disaster-reduction satellite multi-spectral data; 4: according to the precipitation deficit rate, the ground water deficit rate and the normalized differential vegetation index, constructing an agricultural drought disaster-inducing factor risk index; and 5: according to the agricultural drought disaster-inducing factor risk index, classifying and grading an agricultural drought disaster-inducing factor risk.

Description

technical field [0001] The invention relates to the application technical field of satellite remote sensing disaster reduction, in particular to a risk assessment method for agricultural drought disaster-causing factors based on real-time daily precipitation and environmental disaster reduction satellite data. Background technique [0002] Droughts occur frequently in my country, and the drought is widespread and lasts for a long time. It is one of the most serious disasters that cause agricultural losses. Agricultural drought is the product of the interaction among disaster-causing factors, disaster-forming environment and disaster-affected body. For a long time, the research on the stability of agricultural drought disaster-forming environment and the vulnerability of hazard-affected bodies has been widely valued, but the agricultural drought disaster-causing factor, the most basic factor that induces agricultural drought, has not been paid enough attention. [0003] In t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 杨思全范一大和海霞黄河王平
Owner MIN OF CIVIL AFFAIRS NAT DISASTER REDUCTION CENT
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