Spatiotemporal Characteristics of Drought in Shanxi Province Based on SPEI

Abstract

All Drought is one of the most complex natural disasters affecting agriculture, water resources, natural ecosystems and society. The paper used the drought index SPEI to quantify the drought events. Based on the average temperature and monthly rainfall data of 15 meteorological stations in Shanxi Province from 1957 to 2017, the SPEI index was calculated at different time scales, and the drought changes at different time scales were analyzed. In the year, the applicability of SPEI index to drought response in Shanxi Province was verified, and the distribution of drought spatial distribution in Shanxi Province was graphically displayed. The results showed that the SPEI index had good applicability to the drought scenario in Shanxi Province. The overall drought degree was higher in summer and summer, and the distribution of drought was uneven with seasonal variation. The degree of drought changed with time in 1960s-2010s, especially in 2000s.