Analysis of spatial distribution characteristics of short-term heavy rainfall combined with DEM Taking Guangzhou City as an axample
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.
short-term heavy rainfallspatial distributionDigital Elevation ModelCollaborative Kriging
万方数据
