摘要
基于2001~2018年的GPM卫星降雨数据,采用一致性检验、累积距平、滑动平均等方法对上海市多年暴雨时空变化进行分析,同时引入随机暴雨移置法(Stochastic Storm Transposition,SST)进行暴雨频率分析。研究发现上海市降雨年际、月际分布不均,近20年降雨量、降雨强度有所增加,空间分布上降雨自东南向西北递减,暴雨仍以局部暴雨为主,且降雨城郊分布明显。SST法得到的暴雨频率分析显示,在较大重现期下设计暴雨的空间不均匀性更为显著,包含降雨时空分布信息的设计暴雨方案可为上海地区防洪规划工作提供依据。
Based on the GPM precipitation products,the spatio-temporal characteristics of precipitation in Shanghai from 2001 to2018 were analyzed by consistency test,departure accumulation,Slip averaging and other methods.Meanwhile,the design storm with spatio-temporal rainfall structure was conducted using the Stochastic Storm Transposition(SST)method.The results show that,the annual and monthly precipitation in Shanghai is unevenly distributed,and the annual total precipitation generally shows an increasing trend with a rate of 236 mm/10 a in the past 20 years.The spatial distribution of rainfall decreases from north-west to south-east,and the rainstorm is still dominated by the localized rains especially concentrated in downtown areas.Compared with the traditional design storm method,the SST method provides the design rainstorm with the information of the spatio-temporal distribution of rainfall,which has great importance in urban hydrological studies.These results could provide the basis for the regional flood control in Shanghai.
作者
庄琦
刘曙光
周正正
ZHUANG Qi;LIU Shuguang;ZHOU Zhengzheng(Department of Hydraulic Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Yangtze River Water Environment,Ministry of Education,TOngji University,Shanghai 200092,China)
出处
《水文》
CSCD
北大核心
2021年第4期74-80,共7页
Journal of China Hydrology
基金
国家自然科学基金资助项目(41672230,51961145106)。
关键词
降雨时空分布
设计暴雨
上海
随机暴雨移置
spatio-temporal distribution of precipitation
design storm
Shanghai
stochastic storm transposition
