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2022 Vol.64, Issue 6 Preview Page
충청지역 극한강우지수의 시공간적 경향과 변동성 분석

Analysis of Spatial-temporal Variability and Trends of Extreme Precipitation Indices over Chungcheong Province, South Korea

aResearcher, Department of Agricultural Civil Engineering; Institute of Agricultural Science & Technology, Kyungpook National University, Daegu 41566, Korea; Department of Agricultural and Biosystems Engineering, University of Ilorin, PMB 1515, Ilorin 240003, Nigeria
bGraduate Student, Department of Agricultural Civil Engineering, Kyungpook National University, Daegu 41566, Korea
cResearcher, Department of Agricultural Civil Engineering; Institute of Agricultural Science & Technology, Kyungpook National University, Daegu 41566, Korea
dProfessor, Department of Agricultural Civil Engineering; Institute of Agricultural Science & Technology, Kyungpook National University, Daegu 41566, Korea
a농업토목공학과 연구원, 경북대학교 농업과학기술원, 대구 41566, 한국, 일로린대학교 농업 및 생물시스템공학과, PMB 1515, 일로린 240003, 나이지리아
b대구 41566 경북대학교 농업토목공학과 대학원생
c농업토목공학과 연구원 경북대학교 농업과학기술원 대구 41566
d대구41566 경북대학교 농업토목공학과 교수
† Corresponding author Tel.: +82-53-950-5731, Fax: +82-53-950-6752 E-mail: ks.choi@knu.ac.kr
2022. pp. 101-112
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Abstract

Extreme precipitation events have recently become a leading cause of disasters. Thus, investigating the variability and trends of extreme precipitation is crucial to mitigate the increasing impact of such events. Spatial distribution and temporal trends in annual precipitation and four extreme precipitation indices of duration (CWD), frequency (R10 mm), intensity (Rx1day), and percentile-based threshold (R95pTOT) were analyzed using the daily precipitation data of 10 observation stations in Chungcheong province during 1974–2020. The precipitation at all observation stations, except the Boryeong station, showed nonsignificant increasing trends at 95% confidence level (CL) and increasing magnitudes from the west to east regions. The high variability in mean annual precipitation was more pronounced around the northeast and northwest regions. Similarly, there were moderate to high patterns in extreme precipitation indices around the northeast region. However, the precipitation indices of duration and frequency consistently increased from the west to east regions, while those of intensity and percentile-based threshold increased from the south to east regions. Nonsignificant increasing trends dominated in CWD, R10 mm, and Rx1day at all stations, except for R10 mm at Boeun station and Rx1day at Cheongju and Jecheon stations, which showed a significantly increasing trend. The spatial distribution of trend magnitude shows that R10 mm increased from the west to east regions. Furthermore, variations in precipitation were very strongly correlated (99% CL) with R10 mm, Rx1day, and R95pTOT at all stations, except with wR10 mm at Cheongju station, which was strongly correlated with a 95% CL.

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Information
  • Publisher :The Korean Society of Agricultural Engineers
  • Publisher(Ko) :한국농공학회
  • Journal Title :Journal of Korean Society of Agricultural Engineers
  • Journal Title(Ko) :한국농공학회논문집
  • Volume : 64
  • No :6
  • Pages :101-112
  • Received Date : 2022-09-26
  • Revised Date : 2022-10-16
  • Accepted Date : 2022-10-20
  • DOI :https://doi.org/10.5389/KSAE.2022.64.6.101
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