结合DEM的短时强降水空间分布特征分析以广州市为例

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Abstract Based on the hourly precipitation data of 316 automatic meteorological observation stations in Guangzhou from 2014 to 2023,the frequency of short-term heavy rainfall (STHR) in recent 10 years was analyzed.A Digital Elevation Model(DEM) was introduced,and the Collaborative Kriging(COK) spatial interpolation method was used to conduct in-depth analysis of the spatial distribution characteristics of STHR frequency at different time scales.The results show that the STHR in Guangzhou is more in the eastern part of the city,less in the western and southern part,with 4 high incidence centers.The frequency and range of STHR in the pre-flood season were higher than those in the post-flood season.From April to June,STHR occurred frequently in the mountainous and hilly areas in the north and east of Guangzhou,with local distribution characteristics in July to August and frequent occurrence in the central urban area in September.The central and southern parts of Guangzhou are most prone to STHR in the morning to noon,while the hilly areas in the central and northern parts tend to occur at night.

Key words： short-term heavy rainfall spatial distribution Digital Elevation Model Collaborative Kriging

Received: 14 March 2024

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	Wen Nanzhen
	Jiao Yang
	Cai Shunming
	Zhu Liyuan
	Wu Ruilin
	He Yaobin

Cite this article:

Wen Nanzhen,Jiao Yang,Cai Shunming等. Analysis of spatial distribution characteristics of shortterm heavy rainfall combined with DEMTaking Guangzhou City as an axample[J]. Meteorological Hydrological and Marine Instrument, 2024, 41(2): 63-65.

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http://www.qxswhy.com/EN/ OR http://www.qxswhy.com/EN/Y2024/V41/I2/63

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