摘要
选取宝鸡地区9县3区1950~2015年的降雹资料和灾情记录,利用小波分析等统计方法对该地区冰雹灾害时空分布情况、冰雹灾害的强度和降雹规律进行了研究。研究结果表明:受全球变暖等大背景影响,宝鸡地区1950~2015年冰雹活动总体趋向频繁。1970年代末到达峰值。1990年代后因防灾能力提升,降雹次数开始下降。由于农业生产规模扩大,冰雹灾害自1980年代末开始增加。小波分析显示,冰雹灾害以28 a为主周期,年内主要集中在5~7月,日内集中在14:00~18:00。宝鸡地区主要有4条降雹路径,陇县为宝鸡地区冰雹灾害发生的高频区域。
The hail disaster records in 9 counties and 3 districts of Baoji area were collected from 1950 to 2015.The temporal and spatial distribution of hail occurrence,as well as the intensity and pattern of hail disaster in this area were studied by using statistical analysis methods such as wavelet analysis.The results showed that the hail occurrence in Baoji area increased from 1950 to 2015 under the background of global warming,and reached the peak in the late 1970s.After the 1990s,the hail occurrence began to decrease due to the enhancement of disaster prevention and control capacity.The hail disaster occurrence began to increase since the late 1980s because of the expansion of agricultural production scale.Wavelet analysis revealed that the main cycle of hail disaster was 28 a.Hail disaster occurred mainly from May to July in a year and from 14:00 to 18:00 in a day.There were four main hail-fall routes in Baoji area,and Longxian county had the highest occurrence frequency of hail disaster in the whole area.
作者
宁忱
陈浩
刘璨然
NING Chen;CHEN Hao;LIU Can-ran(College of Geography and Environment,Baoji University of Arts and Sciences,Baoji 721013,China)
出处
《江西农业学报》
CAS
2018年第4期110-116,共7页
Acta Agriculturae Jiangxi
基金
陕西省教育厅重点实验室项目(16JS006)
宝鸡文理学院博士启动费项目(ZK16065)
关键词
冰雹灾害
时空变化规律
宝鸡地区
Hail disaster
Temporal and spatial distribution
Baoji area
作者简介
宁忱（1992─），男，陕西咸阳人，硕士研究生，主要从事地理建模研究。;通讯作者：陈浩。
