山东农业科学2017，Vol.49Issue(7)：131-138,8.DOI:10.14083/j.issn.1001-4942.2017.07.029
基于标准化降水指数的鲁西地区干旱时空特征分析
Analysis of Spatial and Temporal Characteristics of Drought inWestern Shandong Based on Standardized Precipitation Index
摘要
Abstract
The annual and seasonal drought evolution characteristics in Western Shandong were analyzed based on the monthly precipitation data of 8 national meteorological stations from 1962 to 2015 by the standardized precipitation index (SPI), principal component analysis and spatial interpolation method of ArcGIS.The results showed that in Western Shandong, the drought had rather high occurrence frequency and lasted a long time.The annual and seasonal drought frequency fluctuated around 30%.The drought degree usually was light drought and moderate drought, and the heavy drought and excessive drought had lower occurrence frequency.In the station number ratio of annual and seasonal drought, the drought in spring and winter showed a decline trend, and the drought in summer and autumn showed an increase trend.The spatial distribution of the first two feature vectors in principal component analysis was in accordance with the regional distribution of station number ratio of drought frequency.关键词
鲁西地区/干旱/标准化降水指数/时空特征Key words
Western Shandong/Drought/Standardized precipitation index/Temporal and spatial characteristics分类
农业科技引用本文复制引用
李楠,李慧,李强,杨志勇,韩学蕾..基于标准化降水指数的鲁西地区干旱时空特征分析[J].山东农业科学,2017,49(7):131-138,8.基金项目
山东省气象局青年基金项目(2016SDQN19) （2016SDQN19）
山东省气象局面上课题(2014sdqxm03) （2014sdqxm03）
