摘要
通过对陕西地区1368-2013a间冰雹灾害事件的搜集整理,利用Arc GIS及Matlab等软件统计分析了该地区冰雹灾害的时空分布特征及周期变化规律。结果表明:1368-2013a间,陕西地区共发生了991次冰雹灾害事件,平均每年发生1.54次,其中初等雹灾、中等雹灾和特等雹灾分别占冰雹灾害的25.43%、61.96%和12.61%。冰雹灾害在时间尺度上存在着175a、250a和500a等3个振荡周期。在时间分布上,冰雹灾害发生的频率呈现出波浪式的上升趋势,18世纪以后,冰雹灾害的发生频次明显增加,且夏秋连雹的现象最多。在空间分布上,区域内雹灾存在明显空间的差异,冰雹灾害主要发生在关中平原西部及以北地区,存在以榆林、延安及陇县为中心的高频区域。
Hail disasters events between 1368 -2013 in Shaanxi province were collected to statistically analyze the characteristics of spatial and temporal distribution and cycle change discipline of hail disasters by using ArcGIS and Matlab software. The results showed that 991 times of hail disasters occurred in Shaanxi region during 1368-2013a, about 1.54 times occurred each year, including elementary, secondary and special hailstorms that accounted for 25.43%, 61.96% and 12.61% of total hail disasters,respectively. Hail disasters existed three periods of oscillation on time scale by 175a, 250 a and 500a. Hail disasters occurring frequency presented a wave of rising trend in time distribution, obviously increased after the 18th century; it mainly concentrated in summer and autumn. On the spatial distribution, hail disasters also existed obvious difference, mainly occurred in the western of Guanzhong plain and north region. There had three high frequency centers in Yulin, Yanan and Longxian area.
作者
万红莲
宋海龙
朱婵婵
刘东玥
WAN Honglian SONG Hailong ZHU Chanchan LIU Dongyue(The Key Laboratory of Disaster Monitoring and Mechanism Simulation of Shaanxi Provinee, Baoji University of Arts and Sciences, Baoji 721013, China School of Literature of Huzhou Teachers CoLlege, Huzhou 313000, China College of Geography and Environment, Baoji University of Arts and Scienees, Baoji 721013, China)
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2017年第2期123-127,共5页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金(41071359)
陕西省教育厅重点实验室项目(15JS008)
陕西省教育科学"十二五"规划课题(SGH140676)
宝鸡市科技计划项目(14SFGG-2)
宝鸡文理学院重点教改项目(JGZD15017)
宝鸡文理学院重点项目(ZK16031)
宝鸡文理学院自然地理学陕西省重点学科基金资助
关键词
历史时期
冰雹灾害
时空分布特征
陕西地区
historical period
hail disaster
spatial temporal distribution characteristics
Shaanxi region