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Quantitative rainfall estimation method combining meteorological radar and rainfall bucket observation data

A weather radar and observation data technology, applied in the field of meteorological detection, can solve the problems of limited number of ground rainfall buckets, inaccurate spatial distribution of precipitation, and high maintenance costs

Active Publication Date: 2021-06-15
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the number of ground rain gauge buckets is very limited, and the maintenance cost is high, so the spatial distribution of precipitation obtained by simply interpolating the observation data of rain gauge buckets is not accurate enough

Method used

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  • Quantitative rainfall estimation method combining meteorological radar and rainfall bucket observation data
  • Quantitative rainfall estimation method combining meteorological radar and rainfall bucket observation data
  • Quantitative rainfall estimation method combining meteorological radar and rainfall bucket observation data

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Embodiment Construction

[0078] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0079] A kind of quantitative precipitation estimation method combined weather radar and rain gauge observation data provided by the present invention is based on the following assumptions: (1) think that the observation value of the rain gauge at the point scale represents the real precipitation value of the point; (2) think that the meteorological The radar observation data can reflect the approximate spatial distribution ...

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Abstract

The invention discloses a quantitative rainfall estimation method combining meteorological radar and rainfall bucket observation data. The method comprises steps of obtaining the original rainfall bucket accumulation data and the original meteorological radar rainfall accumulation data, and obtaining a matched rainfall bucket-meteorological radar data G / R pair on a grid at a same geographic position; calculating observation errors of original meteorological radar rainfall accumulation data by using the G / R pairs, performing abnormal data detection, generating an initial correction factor field, judging whether distance correlation exists between the initial correction factor field and the observation errors or not, if so, adjusting the initial correction factor field, and if not, adjusting the initial correction factor field; and correcting the original meteorological radar rainfall accumulation data by using the adjusted correction factor field to obtain the corrected meteorological radar rainfall accumulation data, otherwise, directly using the average field deviation to obtain the corrected meteorological radar rainfall accumulation data. According to the method, meteorological radar and rainfall bucket observation data are effectively combined, and quantitative rainfall estimation which is more accurate in space and wide in application range is formed.

Description

technical field [0001] The invention relates to the field of meteorological detection, in particular to a quantitative precipitation estimation method combining weather radar and rain barrel observation data. Background technique [0002] Weather radars and rain barrels are common instruments for observing precipitation. Quantitative precipitation data based on meteorological radar signals has been more and more widely used around the world due to its characteristics of full automation, high temporal and spatial resolution, and strong timeliness. [0003] The transmitter antenna of the weather radar emits electromagnetic waves into the atmosphere. When precipitation occurs, the electromagnetic waves collide with the raindrops and form reflected echoes, which are received by the receiver antenna of the weather radar. The more numerous and larger the raindrops in the sky, the greater the signal strength of the weather radar returns. It can be inferred that the echo signal in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/14G01S13/86G01S13/95
CPCG01W1/14G01S13/86G01S13/95Y02A90/10G01W1/06
Inventor 何鑫孙青言陆垂裕严聆嘉吴初秦韬
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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