摘要
根据淮河流域32个气象站逐月气象数据,采用标准化降水指数(SPI)、正交经验分解函数和旋转正交经验分解函数等方法,分析近50a淮河流域旱涝时空变化分布特征。结果表明,淮河流域旱涝灾害多交替发生在春夏二季。旱涝分布存在一定的一致性,又由于受地形地貌、地理位置以及季风等因素的影响,亦存在空间变异性。
According to the monthly meteorological data from 32 stations in Huaihe basin, spatial-temporal distribution characteristics of drought and flood changes in recent 50 years in Huaihe region were analyzed using standardized precipitation index （SPI）, experience orthogona decomposition function and rotating orthogonal function. Results showed that flood and drought mainly appeared alternately in summer and autumn in Huaihe basin. There was a certain consistency for distribution of drought and flood, and spatial variability exsited due to the topography and geomorphology, the geographical position and monsoon.
出处
《灌溉排水学报》
CSCD
北大核心
2014年第6期117-121,共5页
Journal of Irrigation and Drainage
基金
黄淮海高产农田作物需水及高效用水技术研究与示范(201203077)
主要农作物涝渍灾害防控关键技术研究与示范(201203032)
关键词
标准化降水指数
经验正交分解函数
旋转经验正交分解函
淮河流域
standardized precipitation index
empirical orthogonal function
rotated empirical orthogonal function
the huaihe basin
