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2020 Vol.62, Issue 3 Preview Page
Drought Hazard Assessment using MODIS-based Evaporative Stress Index (ESI) and ROC Analysis

MODIS 위성영상 기반 ESI와 ROC 분석을 이용한 가뭄위험평가

Dong-Hyun Yoona
,
Won-Ho Namb†
,
Hee-Jin Leec
,
Eun-Mi Hongd
,
Taegon Kime
윤 동현a
,
남 원호b†
,
이 희진c
,
홍 은미d
,
김 태곤e
aGraduate Student, Department of Bioresources and Rural 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
cGraduate Student, Department of Bioresources and Rural Systems Engineering, Hankyong National University, Anseong, Republic of Korea
dAssistant Professor, School of Natural Resources and Environmental Science, Kangwon National University, Chuncheon, Republic of Korea
eResearch Associate, Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, USA
a한경 대학교 생명 자원 및 농촌 시스템 공학과 대학원생
b한경 대학교 국립 농업 수자원 연구 센터 농업 환경 과학 연구원 사회 안전 시스템 공학과 부교수
c한경 대학교 생명 자원 및 농촌 시스템 공학과 대학원생
d강원 대학교 춘천 자연 자원 환경 과학부 조교수
e미네소타 주 미네소타 주 미네소타 대학교 바이오 제품 및 바이오 시스템 공학과 연구원
† Corresponding author Tel.: +82-31-670-5137, Fax: +82-31-670-5139 E-mail: wonho.nam@hknu.ac.kr
2020. pp. 51-61
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Abstract

Drought events are not clear when those start and end compared with other natural disasters. Because drought events have different timing and severity of damage depending on the region, various studies are being conducted using satellite images to identify regional drought occurrence differences. In this study, we investigated the applicability of drought assessment using the Evaporative Stress Index (ESI) based on Moderate Resolution Imaging Spectroradiometer (MODIS) satellite images. The ESI is an indicator of agricultural drought that describes anomalies in actual and reference evapotranspiration (ET) ratios that are retrieved using remotely sensed inputs of Land Surface Temperature (LST) and Leaf Area Index (LAI). However, these approaches have a limited spatial resolution when mapping detailed vegetation stress caused by drought, and drought hazard in the actual crop cultivation areas due to the small crop cultivation in South Korea. For these reasons, the development of a drought index that provides detailed higher resolution ESI, a 500 m resolution image is essential to improve the country’s drought monitoring capabilities. The newly calculated ESI was verified through the existing 5 km resolution ESI and historical records for drought impacts. This study evaluates the performance of the recently developed 500 m resolution ESI for severe and extreme drought events that occurred in South Korea in 2001, 2009, 2014, and 2017. As a result, the two ESIs showed high correlation and tendency using Receiver Operating Characteristics (ROC) analysis. In addition, it will provide the necessary information on the spatial resolution to evaluate regional drought hazard assessment and and the small-scale cultivation area across South Korea.

Keywords
Drought monitoring
evaporative stress index (ESI)
satellite imagery
receiver operating characteristics (ROC)
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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 : 62
  • No :3
  • Pages :51-61
  • Received Date : 2020-03-27
  • Revised Date : 2020-05-14
  • Accepted Date : 2020-05-14
  • DOI :https://doi.org/10.5389/KSAE.2020.62.3.051
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