Refined Characteristics of Extreme Short-Term Heavy Precipitation in Qingyuan and the Influence of Topography
WEI Cui
ZHANG Chenxian
HUANG Qingxi
HU Xiaoni
WANG Chao
WEI Rui
Abstract：This article uses hourly precipitation data from intensively located meteorological monitoring stations in Qingyuan area from 2011 to 2022 to analyze the fine-scale spatial and temporal distribution char-acteristics of extreme short-term heavy precipitation in Qingyuan City.The results show that in the past 12 years,the frequency of extreme short-term heavy precipitation in Qingyuan City generally shows a"higher in the south and lower in the north"spatial pattern,with four high-frequency centers.Its occurrence displays distinct seasonality,with a monthly frequency distribution characterized by a"double-peak"pattern.The pri-mary peak occurs in May and June,while a secondary peak is observed in August.Temporally,extreme short-term heavy precipitation events are most likely to occur during two periods:from afternoon to evening,and in the early morning hours.Furthermore,the study highlights a strong correlation between the occurrence of ex-treme short-term heavy rainfall and topographical features in Qingyuan City.These events frequently occur on windward slopes and in valley terrains,with the maximum rainfall intensity typically generated by the wind-ward slope topography of trumpet-shaped valleys.
Keywords：climatologyextreme short-term heavy rainfallrefinementtopographyQingyuan
Publication Date：2025-04-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 28-31,37 )