摘要
以承德市9个气象观测站资料为基础,运用经典统计学、小波分析方法,研究了区域降雨量的倾向趋势、震荡周期与空间分布特征。结果表明,1951~2018年承德市年降雨量呈弱增加趋势,倾向斜率1.1105mm/a,各季节中除了秋季和冬季降雨量呈减少趋势外,春夏季节的降雨量表现出增加趋势,但均不显著。承德市年、季降雨量变化周期以3~5a的短周期为主,另外有13,20a等多个长周期;区域降水受季风与海洋暖湿气流路径影响,呈现自中南部向西和北部减少的地带性特征。
Based on the data of 9 meteorological stations in Chengde,the trend,oscillation period and spatial distribution of regional rainfall are studied by using classical statistics,wavelet analysis and geostatistics.The results show that the annual rainfall in Chengde from 1951 to 2018 shows an increasing trend,with a slope of 1.1105mm/a.in all seasons,except autumn and winter,the annual rainfall shows an increasing trend,but it is not significant.The annual and seasonal rainfall in Chengde is dominated by short cycles of 3~5 years,and also by long cycles of 13 and 20 years,show from the south-central to the west and north of the reduction of the zonal characteristics.
作者
刘剑达
LIU Jianda(Hydrologic and Water Resources Survey Bureau of Chengde,Chengde 067000,China)
出处
《水科学与工程技术》
2020年第2期19-21,共3页
Water Sciences and Engineering Technology
关键词
降雨量
时间变化
空间分布
rainfall
temporal variation
spatial distribution
