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暴雨灾害  2020, Vol. 39 Issue (5): 524-531    DOI: 10.3969/j.issn.1004-9045.2020.05.011
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基于SPI指数的黄土高原区域旱涝特征分析
李常德1,2, 王磊2, 李晓霞1, 李奇三3, 常臻1, 马真1
1. 甘肃省平凉市气象局, 平凉 744000;
2. 成都信息工程大学, 成都 610225;
3. 甘肃省白银市气象局, 白银 730900
Temporal and spatial characteristics of droughts and floods in the Loess Plateau based on standardized precipitation index
LI Changde1,2, WANG Lei2, LI Xiaoxia1, LI Qisan3, CHANG Zhen1, MA Zhen1
1. Meteorological Bureau of Pingliang, Pingliang 744000;
2. Chengdu University of Information Technology, Chengdu 610225;
3. Meteorological Bureau of Baiyin, Baiyin 730900
 全文: PDF (4120 KB)   HTML ( 输出: BibTeX | EndNote (RIS)      背景资料
摘要 利用1961—2018年黄土高原区域57个基准站逐月降水资料,引入标准化降水指数(SPI)以及多个旱涝评估指标研究了黄土高原旱涝频率时间分布特征、旱涝趋势演变特征和旱涝范围、强度演变特征等,并得出了年和夏季旱涝频率、趋势的空间分布特征以及不同地形区分布特征。分析研究表明,近58 a黄土高原旱的频率高于涝,各季中夏旱、夏涝频率最高,重度及以上旱以夏、春居多,重度及以上涝以春、秋居多;研究区各时间区间中季、月均以趋于干旱为主,近58 a总体趋于干旱;20世纪60到80年代旱涝交替出现,90年代干旱开始增多,干旱强度加剧,21世纪00年代开始干旱有所缓和,10年代由旱转涝;研究区域逐年干旱站次比和干旱强度先趋于增大后减小,雨涝站次比和雨涝强度则先趋于减小后增大,90年代干旱最重,60年代雨涝最重;研究还得出了旱涝发生高频区及变化趋势显著区,夏季多起伏地形旱涝频率总体高于平缓地形。
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李常德
王磊
李晓霞
李奇三
常臻
马真
关键词黄土高原   标准化降水指数   旱涝强度   旱涝频率     
Abstract: Based on the monthly precipitation data of 57 stations in the Loess Plateau from 1961 to 2018, this paper introduces the standardized precipitation index (SPI) and several assessment indicators of droughts and floods to study the temporal characteristics of the frequencies, the trend characteristics, the changes of the range and intensity of droughts and floods in the Loess Plateau. The spatial and topographical distribution characteristics of annual and summer frequencies and variable trend of droughts and floods are also obtained. The research shows that the droughts frequency of the Loess Plateau is higher than that of floods, the frequencies of summer droughts and summer floods are the highest among the seasons, severe droughts often occur in summer and spring, severe floods often occur in spring and autumn. Overall, the Loess Plateau tends to be arid in the past 58 years, and the trends are also the same in seasons and months. Droughts and floods alternately appeared in the 1960s and 1980s, the number and the intensity of droughts increased in the 1990s. Since the beginning of the 2000s, the drought has eased, and there is a change from drought to flood in the 2010s.The ratio of drought stations and the intensity of drought tend to increase and then decrease, while the ratio of flood stations and the intensity of flood tend to decrease and then increase. In the 1990s, the drought was the heaviest, while in the 1960s, the flood was the heaviest. The zone where droughts and floods happened frequently and the area of significant trend are also obtained by the research, frequencies of droughts and floods in the undulating terrain are generally higher than that in the gentle terrain in summer.
Key wordsThe loess plateau   SPI   intensity of droughts and floods   frequency of droughts and floods   
收稿日期: 2019-10-29;
基金资助:甘肃省气象局气象科研项目(GSMArc2019-17;Zcms2019-22);平凉市气象局气象科研项目(PLZd2019-03)
通讯作者: 李晓霞,主要从事天气气候研究。E-mail:876569907@qq.com   
作者简介: 李常德,主要从事天气气候研究。E-mail:455545325@qq.com
引用本文:   
李常德, 王磊, 李晓霞,等 .2020. 基于SPI指数的黄土高原区域旱涝特征分析[J]. 暴雨灾害, 39(5): 524-531.
LI Changde, WANG Lei, LI Xiaoxia, et al .2020. Temporal and spatial characteristics of droughts and floods in the Loess Plateau based on standardized precipitation index[J]. Torrential Rain and Disasters, 39(5): 524-531.
 
没有本文参考文献
[1] 井喜,李强,屠妮妮,井宇,陈闯,高雪娇,杨丽丽. 黄土高原一次β中尺度突发性暴雨特征及成因[J]. 暴雨灾害, 2013, 32(3): 242-248.
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