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Volume 40 Issue 11
Nov.  2022
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Article Navigation >  ENVIRONMENTAL ENGINEERING  > 2022  >  40(11): 41-46
DU Ying'en, HOU Jingming, CHAI Jie, BAI Guangbi, LI Xuan, ZHANG Hongfang, ZHANG Zhaoan, CHEN Guangzhao, LI Bingyao. TEMPORAL VARIATION CHARACTERISTICS OF PRECIPITATION EXTREMES IN XI'AN[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 41-46. doi: 10.13205/j.hjgc.202211006
Citation: DU Ying'en, HOU Jingming, CHAI Jie, BAI Guangbi, LI Xuan, ZHANG Hongfang, ZHANG Zhaoan, CHEN Guangzhao, LI Bingyao. TEMPORAL VARIATION CHARACTERISTICS OF PRECIPITATION EXTREMES IN XI'AN[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 41-46. doi: 10.13205/j.hjgc.202211006
shu

TEMPORAL VARIATION CHARACTERISTICS OF PRECIPITATION EXTREMES IN XI'AN

doi: 10.13205/j.hjgc.202211006

  • 1. State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an 710048, China;

  • 2. Northwest A&F University, Yangling 712100, China;

  • 3. Shaanxi Meteorological Service Center, Shaanxi Meteorological Bureau, Xi'an 710010, China

  • Received Date: 2021-12-31
    Available Online: 2023-03-24
    Abstract
  • Global climate variation leads to frequent urban flood disasters. Extreme rainfall has the characteristics of short duration and rapid disaster, which is the major cause of urban inundation. The study on the changing trend of extreme rainfall can provide a reference for cities to deal with inundation. To analyze the temporal evolution characteristics of extreme rainfall events in Xi'an, this paper analyzed the rainfall data of Xi'an from 1990 to 2020 by using the methods of moving average, linear regression, M-K mutation test, and Hurst index analysis. After that, the change characteristics of rainfall events in Xi'an over the past 30 years were obtained, and the future change trend was predicted and analyzed. The results showed that:1) there was no obvious change trend of annual rainfall in Xi'an, however, the extreme rainfall showed an increasing trend at the rate of 29 mm/10 a, and the trend had an increasing mutation in 2002; 2) the frequency of extreme rainfall showed an increasing trend of 0.85 times/10 a, however, the frequency of extreme rainfall had an increasing mutation in 2014; 3) the H values of extreme rainfall and extreme rainfall frequency were 0.974 and 0.893 respectively, and both had strong sustainability. This showed that the change trends of both were consistent with the past, and the extreme rainfall events in Xi'an would continue to increase in the future.
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