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2016 Vol.49, Issue 1 Preview Page
Development and Application of Drought Index Based on Accumulative Pattern of Daily Rainfall

일 단위 강수량의 누적 패턴을 이용한 가뭄지수 개발 및 적용

Minsung Kwona
,
Dong-Hyeok Parkb
,
Kyung Soo Juna
,
Tae-Woong Kimc*
권 민성a
,
박 동혁b
,
전 경수a
,
김 태웅c*
aGraduate School of Water Resources, Sungkyunkwan Univ.
bDept. of Civil and Environmental Engineering, Hanyang Univ.
cDept. of Civil and Environmental Engineering, Hanyang Univ.
a성균관대학교 수자원전문대학원
b한양대학교 대학원 건설환경공학과
c한양대학교 공학대학 건설환경플랜트공학과
*교신저자. *Corresponding Author. 
31 January 2016. pp. 41-49
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Abstract

This study proposed a new drought index considering the accumulative pattern of daily rainfall, i.e., Rainfall Accumulation Drought Index (RADI). The RADI can be easily calculated at daily scale by comparing the long-term averaged cumulative rainfall to the observed cumulative rainfall for a specific duration. This study evaluated the availability of the RADI in the field of monitoring short-term and long-term droughts by investigating the spatial and temporal variability and the recurrence cycle of drought in South Korea. To present the short-term and long-term droughts, the various SPIs with different durations should be used in practice. However, the RADI can present and monitor both short-term and long-term droughts as a single index. By investigating the national average of the RADI, specific drought patterns of 20-year cycle were identified in this study. This study also proposed a five-level drought classification considering occurrence probability that would be a suitable alternative as a drought criterion for drought forecast/response.

Keywords
accumulative pattern
daily rainfall
drought index

본 연구에서는 일강수량의 누적 패턴을 고려하여 새로운 가뭄지수(RADI)를 개발하였다. RADI는 누적 강수량의 장기간의 평균과 특정 기간에 관측된 누적 강수량을 비교하여 일단위로 가뭄지수를 간단히 산정할 수 있도록 개발되었다. 우리나라의 대표적인 가뭄기간 동안의 RADI의 시·공간적 변동성과 재현 주기를 살펴봄으로써 장·단기 가뭄의 감시에 대한 RADI의 적용성을 평가하였다. SPI의 경우, 장·단기 가뭄을 표현하기 위해서는 여러 가지 지속기간을 가지는 SPI를 사용해야 하지만, RADI는 하나의 지수로 단기 및 장기가뭄을 표현하고 모니터링 할 수 있다. RADI의 전국 평균값을 살펴본 결과, 우리나라에서 20년 주기로 가뭄이 발생하고 있다는 사실을 확인하였다. 또한 RADI의 발생확률 및 통계 분석을 통해 5단계의 가뭄 등급을 제안하였으며, 이는 가뭄 예보와 대응을 위한 기준으로 활용될 수 있을 것으로 판단된다.

키워드
가뭄지수
누적 패턴
일강수
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 49
  • No :1
  • Pages :41-49
  • Received Date : 2015-10-10
  • Revised Date : 2015-11-13
  • Accepted Date : 2015-11-17
  • DOI :https://doi.org/10.3741/JKWRA.2016.49.1.41
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