Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Drought Monitoring for Paddy Fields Using Satellite-derived Evaporative Stress Index

위성영상기반 증발스트레스지수를 활용한 필지단위 논 가뭄 모니터링

  • Lee, Hee-Jin (Department of Bioresources and Rural Systems Engineering, National Agricultural Water Research Center, Hankyong National University) ;
  • Nam, Won-Ho (School of Social Safety and Systems Engineering, Institute of Agricultural Environmental Science, National Agricultural Water Research Center, Hankyong National University) ;
  • Yoon, Dong-Hyun (Department of Convergence of Information and Communication Engineering, Hankyong National University) ;
  • Kim, Ha-Young (School of Social Safety and Systems Engineering, Hankyong National University) ;
  • Woo, Seung-Beom (School of Social Safety and Systems Engineering, Hankyong National University) ;
  • Kim, Dae-Eui (Rural Research Institute, Korea Rural Community Corporation)
  • Received : 2021.03.09
  • Accepted : 2021.03.31
  • Published : 2021.05.31
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Abstract

Drought monitoring over paddy field area is an important role as the frequency and intensity of drought due to climate change increases. This study analyzed the applicability of drought monitoring on paddy crops using MODIS-based field surveys. As a satellite-based drought index using evapotranspiration for quantitative drought determination, ESI (Evaporative Stress Index), was applied and calculated through the ratio of MODIS- based actual and potential evapotranspiration. For the irrigated areas of Idong, Gosam, Geumgwang, and Madun reservoirs the availability of irrigation water supply, ponding depth, precipitation, paddy growth were investigated for the paddy field within one grid of MODIS. In addition, the percentile-based ESI drought severity was calculated to compare the growth process of paddy and changes in the drought category of ESI. The Idong area was irrigated about a week later than other reservoirs for the period of water supply, transplanting, and water drainage and the ESI drought category tended to be different. The Gosam, Geumgwang, and Madun area expressed moderate drought prior to the farming season, and indicated normal as the water was supplied. During the water drainage, the drought category intensified, indicating that the water available on land was decreasing. These results demonstrated that the MODIS-based ESI could be an effective tool for agricultural drought monitoring over paddy field area.

Keywords

Acknowledgement

본 연구는 행정안전부 극한재난대응기반기술개발사업의 연구비 지원 (2019-MOIS31-010)에 의해 수행되었습니다.

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