RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2019, Vol. 28 >> Issue (04): 971-980.doi: 10.11870/cjlyzyyhj201904022

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Spatial and Temporal Characteristics of Extreme Precipitation and Drought in Hengshui City from 1961 to 2015

KE Hang1,2, WANG Xiao-jun2,3, YIN Yi-xing1, LUO Zhi-wen1,2   

  1. (1. School of Hydrology and Water Resources, NUIST, Nanjing 210044, China; 2. State Key Laboratory of Hydrology-Water 
    Resources and Hydraulic Engineering, Nanjing Hydraulic Research Institute, Nanjing 210029, China; 
    3. Research Center for Climate Change, Ministry of Water Resources, Nanjing 210029, China)
  • Online:2019-04-20 Published:2019-05-09

Abstract: Based on the daily precipitation data of 11 meteorological stations in Hengshui City, Hebei Province from 1961 to 2015, StarDex extreme precipitation index and SPEI drought index were used to analyze the spatial and temporal characteristics of precipitation and drought in the city. The results showed that:(1) the Max no. consecutive dry days (PXCDD) and the mean of dry spell lengths (PDSAV) show an upward trend, while Max no. consecutive wet days (PXCWD) and annual precipitation decreased. (2) From the perspective of spatial distribution, there was a trend toward drought in the western and northern regions. (3) SPEI indicated a significant increase in the occurrence number of drought after the 1990s. Annual, summer and winter series tend to develop toward drought. Droughts occured more frequently in the west and north. (4) The extreme precipitation index correlated well with SPEI. SPI and SPEI had good consistency at the 12-month scale, but there were differences on the degree of drought. The extreme precipitation index and SPI performed well in typical drought years of different degrees. In general, the drought in Hengshui City was becoming more and more severe, which was characterized by frequent occurrence in summer and winter, and severe disaster in the west and north. 


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