1961-2010年浙江省极端降水特征分析  

The Characteristics of Extreme Precipitation in Zhejiang Province from 1961 to 2010

作　　者：丁楠[1] 沙晓军 高颖会[1] 王婷[1] 游志康 徐向阳[1] DING Nan SHA Xiao-jun GAO Ying-hui WANG Ting YOU Zhi-kang XU Xiang-yang(College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China Water Management Office of Jiangyin ,Jiangyin 214400, Jiangsu Province, China)

机构地区：[1]河海大学水文水资源学院,南京210098 [2]江阴市水资源管理办公室,江苏江阴214400

出　　处：《中国农村水利水电》2017年第2期104-107,共4页China Rural Water and Hydropower

基　　金：中国工程院重大咨询研究项目(2015-ZD-07)

摘　　要：基于浙江省21个代表雨量站1961-2010年逐日降水资料,利用百分位值法定义各雨量站极端降水事件的阈值,分析了各雨量站年极端降水量、极端降水发生频次、极端降水强度和最大日降水量的空间分布特征,并对年极端降水量进行了趋势分析和突变检验。结果表明:年极端降水量、极端降水发生频次、极端降水强度和最大日降水量空间分布基本一致,呈南多北少,东南沿海地区最多的特征,且最大值均出现在临海市的括苍山地区;年极端降水量整体上呈不显著上升趋势,东南沿海地区上升最为显著;突变时间多出现在改革开放后的20世纪80年代初至20世纪90年代末。浙江省的极端降水特征与该地区城镇化的快速发展和特殊的地形地貌有关。Based on the daily precipitation data of 21 rainfall stations in Zhejiang Province from 1961 to 2010, this paper defines the percentile as the threshold of extreme precipitation for each rainfall station and analyzes the characteristics of the spatial distribution of annual amount, frequency, intensity, annual daily maximum amount of extreme precipitation events. The trend and time mutation of annual extreme precipitation are also studied. The results indicate that the spatial characteristics of annual amount, frequency, intensity and annual daily maximum amount of extreme precipitation events are basically the same, i.e., the numeric gradually decreases from south to north and their high-value centers are all located in Kuocang Mountain of Linhai. The annual extreme precipitation shows a weakly increasing trend, and the southeast coastal area in Zhejiang Province increases significantly. The time mutation appeared mostly from the early 1980s to the late 1990s. Moreover, the extreme precipitation characteristics may be associated with the rapid development of urbanization as well as the special topography of the region.

关 键 词：极端降水特征 极端降水事件 极端降水频次 趋势分析 浙江省 

分 类 号：TV125[水利工程—水文学及水资源]