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Method and system for reducing short-time rainfall estimation deviation

A deviation and short-term technology, applied in the fields of radar rainfall model, image processing, and average calibration, can solve problems such as long time consumption and complex calculation of correction methods

Active Publication Date: 2020-09-11
SHANDONG LANGCHAO YUNTOU INFORMATION TECH CO LTD
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Problems solved by technology

In order to further improve the accuracy of estimated precipitation, the researchers also used the average calibration method, variational assimilation method, and Kalman filter calibration method for correction. time consuming

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  • Method and system for reducing short-time rainfall estimation deviation
  • Method and system for reducing short-time rainfall estimation deviation

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[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part 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 those of ordinary skill in the art without creative work belong to the protection of the present invention. scope.

[0046] On the basis of the previous research results, the present invention proposes to determine the Z-R relationship by using the radar map data and the average calibration method, establish the Z-R relationship through the actual precipitation data and the radar echo data, and use the relevant formula to inversely calculate the correction coefficient,...

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Abstract

The invention provides a method and a system for reducing short-time rainfall estimation deviation, and belongs to the field of image processing, radar rainfall models and average calibration. According to the method, the Z-R relationship is determined by utilizing radar map data information and an average calibration method, the Z-R relationship is established through actual precipitation data and radar echo data, a correction coefficient is obtained through back-stepping calculation by utilizing a related formula, and then a Z-R relationship model with the correction coefficient is obtainedto quantitatively estimate the precipitation of the observation grid point without the automatic station. The problem of short-time rainfall estimation deviation at present is solved, high-resolutionquantitative estimation rainfall data with business application value can be obtained in real time, and auxiliary support is provided for fine forecasting service and heavy rainfall waterlogging riskassessment.

Description

technical field [0001] The invention relates to the fields of image processing, radar rainfall models, and average calibration, and in particular to a method and system for reducing short-term precipitation estimation deviations. Background technique [0002] In recent years, using the new generation of Doppler weather radar to retrieve precipitation technology has become the focus of radar data application research. Radar can detect cloud and precipitation structure and system occurrence, development and evolution in real time, and can quickly provide real-time precipitation in a certain area. Precipitation retrieved by radar is the basic data of refined meteorological services, and it has high application value for monitoring and analysis of weather and climate, assessment of heavy rainfall disasters, verification and calibration of numerical forecast models, and hydrological analysis. [0003] Doppler weather radar generally uses Z=AR to measure rainfall b (Z-radar refl...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41Y02A90/10
Inventor 欧阳彤宋海涛尹曦萌颜丙洋于春蕾
Owner SHANDONG LANGCHAO YUNTOU INFORMATION TECH CO LTD
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