凉山州暴雨预警信号的发布特征变化研究

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中图分类号P426.62 文献标识码A 文章编号1007-7731（2025）13-0096-03

DOI号 10.16377/j.cnki.issn1007-7731.2025.13.023

Research on characteristics and changes of heavy rain warning signals issued in LiangshanPrefecture

WANG Chuanyun

（Liangshan Yi Autonomous Prefecture Meteorological Bureau，Xichang 615OOo， China）

AbstractThe issuancedata of rainstorm warning signals issued by meteorological stations in Liangshan Prefecture from 2O18 to 2O24 were analyzed in this study to compare interannual and monthly variations，as wellas spatial distribution patterns.The findingsrevealed that（1）An increasing trend was observed intheannual average number ofrainstorm warnings issued，with a significant rise recorded in2O24 when 617warning signals were isued， 93.8% of which were concentrated between June and September.（2）Regarding the tiered warning mechanism，the proportion offirst-issued yellow warnings was found to have decreased by 28.8 percentage points in 2024 compared to 2018-2023，while the proportionof updated warnings increased by31.7O percentage points.The proportion offirstissued orange warnings was shown to have risen to 65.3% ，and red warningswere documented to have been issued for thefirsttime in 2O24. （3）A decentralized distribution pattern was identified in the total number of rainstorm warnings issuedacrossLiangshan Prefectureduring 2O18-2O23，whereas aspatial distribution characterizedby higher frequency in the southwest and lower frequencyin the northeast was demonstrated in 2O24.To improve the timeliness and effectiveness of warning issuance，recommendations were made to enhance public education on rainstorm warning standards and to establish a 5G-GIS intelligent dissemination system.

Keywordsheavy rain;warning signal; tiered warning;spatial distribution

暴雨是主要的气象灾害之一，具有突发性强、破坏力大等特点。（剩余3318字）