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Drought early warning method and device reflecting non-uniform drought characteristic variables

A feature variable, drought technology, applied in complex mathematical operations and other directions, can solve problems such as inaccurate analysis results

Active Publication Date: 2020-10-23
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0006] Embodiments of the present invention provide a drought early warning method and device reflecting non-uniform drought characteristic variables, so as to solve the inaccurate analysis results of the drought analysis method for non-uniform drought characteristic variables in the related art. question

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  • Drought early warning method and device reflecting non-uniform drought characteristic variables
  • Drought early warning method and device reflecting non-uniform drought characteristic variables
  • Drought early warning method and device reflecting non-uniform drought characteristic variables

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Embodiment Construction

[0061] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0062] see figure 1 , an embodiment of the present invention provides a drought early warning method reflecting non-uniform drought characteristic variables, the method may include the following steps:

[0063] Step 101, obtaining the meteorological drought index of the target area within a preset historical time period.

[0064] In a specific implementation, the meteorological drought index may also be referred to as "comprehensive meteorological dro...

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Abstract

The embodiment of the invention provides a drought early warning method and device for reflecting inconsistent drought characteristic variables, and the method comprises the steps: obtaining a meteorological drought index of a target region in a preset historical time period; according to the meteorological drought index, determining a drought characteristic variable sequence, and the drought characteristic variable sequence comprises drought characteristic variables of each year in the preset historical time period; according to a target probability distribution function, determining a drought recurrence period, corresponding to the estimated drought characteristic variable, of the target area, the target probability distribution function being matched with the drought characteristic variable sequence; and outputting drought early warning information under the condition that the drought recurrence period is greater than or equal to a preset recurrence period. According to the embodiment of the invention, the accuracy of the drought recurrence period calculated by the target probability distribution function can be improved.

Description

technical field [0001] The invention relates to the technical field of drought early warning, in particular to a drought early warning method and device reflecting non-uniform drought characteristic variables. Background technique [0002] In the related technology, the meteorological drought index and run theory are used to determine the drought characteristic variable, and the drought return period is determined according to the frequency analysis method of the drought variable. [0003] Among them, the meteorological drought index includes precipitation anomaly percentage, relative humidity index, standardized precipitation index, relative soil humidity drought index, Palmer drought index, meteorological drought index and other drought index values; in addition, in the run theory, the pre-set drought Index threshold, if several drought index values ​​are less than the drought index threshold, it is considered to be a drought, and greater than the drought index threshold i...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/18
CPCG06F17/18
Inventor 鲁帆宋昕熠肖伟华严登华赵勇孙高虎侯保灯许怡然
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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