水资源保护2019，Vol.35Issue(1)：35-40,6.DOI:10.3880/j.issn.1004-6933.2019.01.007
基于两种SPEI序列的淮河流域干湿特征变化
Change of dry-wet characteristics in Huaihe River Basin based on two SPEI sequences
摘要
Abstract
Based on two potential evapotranspiration calculation methods of FAO56 Penman-Monteith and HargreavesSamani, standardized precipitation evapotranspiration index (SPEI) at 12-month scale was obtained. The spatial and temporal variations of dry and wet in Huaihe River Basin from 1960 to 2016 and the sensitivity of two SPEI sequences to related meteorological factors were studied. The results show that both SPEI sequences show a trend of wetting. The temperature anomaly is negatively correlated with SPEI and positively correlated with the potential evapotranspiration anomaly. Spatially, the northwest and east of the basin show a significant trend of wetting, while the central region shows a non-significant trend of drying. After the detrend of SPEI, the slope of dry-wet change in the basin decreases, and the detrend process does not change the trend distribution of SPEI, but only affects the range of dry-wet change in the basin.The trend change of meteorological factors can affect the trend and grade of dry-wet change in the basin. The order of influencing factors of dry-wet change in Huaihe River Basin from strong to weak is temperature, sunshine duration, wind speed and relative humidity.关键词
潜在蒸散发/标准化降水蒸散指数/干湿变化/敏感性/淮河流域Key words
potential evapotranspiration/SPEI/dry-wet change/sensitivity/Huaihe River Basin分类
天文与地球科学引用本文复制引用
冯怡,薛联青,张敏,苗智英,任磊,张子沐..基于两种SPEI序列的淮河流域干湿特征变化[J].水资源保护,2019,35(1):35-40,6.基金项目
江苏省水利科技项目(2017027) （2017027）
