Characteristics Analysis of Short-term Heavy Precipitation in Nansha,Guangzhou for the Past 11 Years
The spatial and temporal distribution characteristics of short-term heavy precipitation(to be referred to as"SHP"hereafter)in Nansha,Guangzhou in 2012 to 2022 were analyzed by using the hourly precipitation data of automatic weather stations of the district in the past 11 years.The results are shown as follows.In the 11 years studied,the annual average number of SHP days in the district is 66 d,mainly with local and regional SHP.The strong precipitation level is mainly 20-40 mm/h.The occurrence of disaster-causing SHP with the rain intensity≥50 mm/h shows a fluctuating growth trend.Extreme SHP is most like-ly to occur in May,which is associated with the annually first rainy season and monsoon outbreak.For heavy rainfall at the level of 20 mm/h,it has the most rain days in July and August,and for heavy rainfall at the level of 50 mm/h,it occurs most frequently in May and August.Both of the rainfall had similar diurnal change,i.e.,from midnight to the evening during the course of the day,both of them increase in fluctua-tion and are most likely to occur from post-midday to the evening.The SHP has uneven spatial distribution with both of the rainfall having two significant areas of frequent occurrence in the north and south.Although they differ in the area they cover,they have identical cores of frequent occurrence,in Lanhe Town for the northern part of Nanshan and in Zhujiang and Longxue Residential Communities as well as the northern part of Wanqingsha for the southern part.
climatologyshort-term heavy precipitationspatiotemporal characteristicsNansha,Guan-gzhou
万方数据
维普
