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2023 Vol.65, Issue 3 Preview Page
Flash Drought Onset and Development Mechanisms Using Flash Drought Intensity Index (FDII) Based on Satellite-Based Soil Moisture

위성영상 토양수분 기반 FDII를 활용한 돌발가뭄의 메커니즘 분석

Hee-Jin Leea
,
Won-Ho Namb†
,
Chanyang Surc
,
Jason A. Otkind
,
Yafang Zhonge
,
Mark D. Svobodaf
이 희진a
,
남 원호b†
,
서 찬양c
,
Otkin Jason A.d
,
Zhong Yafange
,
Svoboda Mark D.f
aPh.D. Student, Department of Convergence Systems Engineering, Hankyong National University, Anseong, Republic of Korea
bAssociate Professor, School of Social Safety and Systems Engineering, Institute of Agricultural Environmental Science, National Agricultural Water Research Center, Hankyong National University, Anseong, Republic of Korea
cSenior Researcher, National Agricultural Water Research Center, Hankyong National University, Anseong, Republic of Korea
dAssociate Scientist, Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin-Madison, WI, USA
eResearch Associate, Cooperative Institute for Meteorological Satellite Studies, Space Science and Engineering Center, University of Wisconsin-Madison, WI, USA
fDirector, National Drought Mitigation Center, School of Natural Resources, University of Nebraska-Lincoln, NE, USA
a대한민국 안성, 한경대학교 융합시스템공학과 박사과정 학생
b한경대학교 사회안전시스템공학부 부교수, 국립농업과학원 농업환경과학연구소, 국립농업용수연구소, 안성, 대한민국
c대한민국 안성, 국립 한경대학교 농업용수연구센터 선임 연구원
d부과학자, 미국 위스콘신대학교-매디슨 우주과학 및 공학 센터 기상위성 연구 협력 연구소, 미국 위스콘신대학교-매디슨, 미국
e미국 위스콘신-매디슨 대학교 우주 과학 및 공학 센터, 기상 위성 연구 협력 연구소 연구원, 미국 위스콘신-매디슨 대학
f미국 네브래스카주 링컨 대학교 천연자원학부 국가 가뭄 완화 센터 책임자, 디렉터
† Corresponding author Tel.: 010-8009-9900, Fax: +82-31-670-5139 E-mail: wonho.nam@hknu.ac.kr
2023. pp. 57-67
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Abstract

A flash drought is a rapid-onset drought that develops over a short period of time as weather and environmental factors change rapidly, unlike general droughts, due to meteorological abnormalities. Abnormally high evapotranspiration rates and rapid declines in soil moisture increase vegetation stress. In addition, crop yields may decrease due to flash droughts during crop growth and may damage agricultural and economic ecosystems. In this study, Flash Drought Intensity Index (FDII) based on soil moisture data from Gravity Recovery Climate Experiment (GRACE) was used to analyze flash drought. FDII, which is calculated using soil moisture percentile, is expressed by multiplying two factors: the rate of intensification and the drought severity. FDII was developed for domestic flash drought events from 2014 to 2018. The flash drought that occurred in 2018, Chungcheongbuk-do showed the highest FDII. FDII was higher in heat wave flash drought than in precipitation deficit flash drought. The results of this study show that FDII is reliable flash drought analysis tool and can be applied to quantitatively analyze the characteristics of flash drought in South Korea.

Keywords
Flash drought
Flash Drought Intensity Index (FDII)
soil moisture
heat wave
drought severity
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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 : 65
  • No :3
  • Pages :57-67
  • Received Date : 2023-03-07
  • Revised Date : 2023-04-20
  • Accepted Date : 2023-04-24
  • DOI :https://doi.org/10.5389/KSAE.2023.65.3.057
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