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近50年来浙江省降雨特性变化分析
引用本文:刘德地,李梅,楼章华,陈晓宏.近50年来浙江省降雨特性变化分析[J].自然资源学报,2009,24(11):1973-1983.
作者姓名:刘德地  李梅  楼章华  陈晓宏
作者单位:1.浙江大学水文与水资源工程研究所,杭州 310058;2.中山大学水资源与环境中心,广州 510275
基金项目:国家自然科学基金,中国博士后科学基金面上资助 
摘    要:基于浙江地区17个气象站的日降水资料,利用统计学方法,分析了近50年来浙江省在汛期、枯季和全年的降雨变化特性。研究结果表明,浙江省东北部的汛期降雨量主要呈现增加趋势,而西南部主要为减少趋势,汛期降雨频率主要表现出不显著的减少趋势,而汛期降雨强度和汛期降雨量在变化趋势上相似;枯季降雨量有较为显著的增强趋势,而枯季降雨频率在浙江东部地区为减少趋势,浙江西、北部、浙江南部有增加趋势;年降雨量在浙江西、北部为增加趋势,且存在明显的11、21年两种不同时间尺度的周期;而浙江南部降雨量在1980年后开始呈现为减少趋势,存在20、8年的明显变化周期;浙江东部年降雨量在1986年前主要为增加趋势,而后为减少趋势,同时也存在11、8、21年3个不同时间尺度的变化周期。

关 键 词:降雨频率  降雨强度  Mann-Kendall检验  小波分析  浙江省  

Analysis of Precipitation Characteristics Variation in Zhejiang Province in the Past 50 Years
LIU De-di,LI Mei,LOU Zhang-hua,CHEN Xiao-hong.Analysis of Precipitation Characteristics Variation in Zhejiang Province in the Past 50 Years[J].Journal of Natural Resources,2009,24(11):1973-1983.
Authors:LIU De-di  LI Mei  LOU Zhang-hua  CHEN Xiao-hong
Abstract:Based on the daily precipitation data from 17 stations in Zhejiang Province and combined with the statistics methods,the precipitation characteristics in the period of flood season,dry season and whole year are analyzed. In flood season,the amounts of precipitation have mainly increased in the northeastern and decreased in the southwestern parts of Zhejiang Province. The frequency of precipitation has not decreased significantly while the intensity and the amount of precipitation show a similar tendency in the flood season in the past 50 years. In dry season,the amounts of precipitation have increased significantly. And the intensities of precipitation reduce in the east of Zhejiang while increase in the southern,western and northern parts of the province. The amounts of annual precipitation in the western and northern parts show a trend to increase with 11-year and 21-year periodic changes. There is a decreasing trend after 1980 with 20-year and 8-year periodic changes in the southern part while there shows an increasing trend before 1986 with 11-year,8-year and 21-year periodic changes in the eastern part.
Keywords:precipitation frequency  precipitation intensity  Mann-Kendall Test  wavelet analysis  Zhejiang Province
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