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Mountain small watershed radar quantitative rainfall estimation technology

A small watershed and radar technology, applied in measuring devices, radio wave measurement systems, radio wave reflection/reradiation, etc., can solve problems such as insufficient accuracy, and achieve the effect of improving accuracy and improving products

Pending Publication Date: 2021-08-27
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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Problems solved by technology

[0006] The purpose of the present invention is to provide radar quantitative precipitation estimation technology for small mountain watersheds, to solve the problem that the current domestic radar QPE business products are still insufficient in the accuracy of quantitative precipitation estimation for small mountain watersheds in the above-mentioned background technology

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  • Mountain small watershed radar quantitative rainfall estimation technology
  • Mountain small watershed radar quantitative rainfall estimation technology

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Embodiment Construction

[0019] 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 only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0020] For the sake of simplicity, common technical knowledge known to those skilled in the art is omitted in the following content.

[0021] Such as figure 1 As shown, it specifically includes the following steps:

[0022] S1: According to the historical radar base data, artificially distinguish physical quantities such as precipitation echo, surface object echo, clear sky echo and sea wave echo, and then establish membership functions according to the chara...

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Abstract

The invention discloses a mountain small watershed radar quantitative rainfall estimation technology in the technical field of convective disaster weather monitoring. The technology comprises the steps of S1, building a membership function, and obtaining Z-R relation statistics of different rainfall types; S2, judging the echo type, and removing non-rainfall echoes; S3, carrying out precipitation type division; S4, carrying out rainfall inversion through echo observation of different rainfall types and Z-R relation statistics of different rainfall types, and generating a single-station radar quantitative rainfall estimation product; and S5, generating a radar precipitation rate puzzle product according to the precipitation puzzle and the radar reflectivity. According to the mountain small watershed radar quantitative rainfall estimation technology, through processing in five aspects, namely, reflectivity factor quality control, rainfall type classification, radar mixed elevation reflectivity calculation, Z-R conversion relation and radar puzzle, the precision of a mountain small watershed weather radar QPE product is improved, and the mountain small watershed weather radar QPE product can better serve rainfall forecast and early warning of hydrological and geological disasters.

Description

technical field [0001] The invention relates to the technical field of convective disaster weather monitoring, in particular to radar quantitative precipitation estimation technology in small mountain watersheds. Background technique [0002] my country's mountainous areas are widely distributed, and the risks of hydrological and geological disasters are relatively high. The deployment of weather radars with higher temporal and spatial resolutions can more precisely describe the spatial and temporal distribution of regional precipitation, and improve the accuracy of hydrological and geological disaster forecasts for small mountain watersheds. The topographical conditions also increase the difficulty of weather radar precipitation detection, making it difficult for the accuracy of weather radar quantitative precipitation estimation (QPE) products to meet application requirements. [0003] At present, China's main radar QPE business products include national network quantitativ...

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Application Information

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IPC IPC(8): G01S13/02G01S13/88
CPCG01S13/02G01S13/88
Inventor 戚友存朱自伟张哲
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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