Journal of The Korean Society of Agricultural Engineers (한국농공학회논문집)

The Korean Society of Agricultural Engineers (한국농공학회)
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Watershed Scale Drought Assessment using Soil Moisture Index

토양수분지수를 이용한 유역단위 가뭄 평가

  • 김옥경 (서울대학교 생태조경.지역시스템공학부 대학원) ;
  • 최진용 (서울대학교 생태조경.지역시스템공학부) ;
  • 장민원 (서울대학교 농업생명과학연구원) ;
  • 유승환 (서울대학교 생태조경.지역시스템공학부 대학원) ;
  • 남원호 (서울대학교 생태조경.지역시스템공학부 대학원) ;
  • 이주헌 (중부대학교 사회기반시스템공학과) ;
  • 노재경 (충남대학교 지역환경토목)
  • Published : 2006.11.30
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Abstract

Although the drought impacts are comparably not catastrophic, the results from the drought are fatal in various social and economical aspects. Different from other natural hazards including floods, drought advances slowly and spreads widely, so that the preparedness is quite important and effective to mitigate the impacts from drought. Soil moisture depletion directly resulted from rainfall shortage is highly related with drought, especially for crops and vegetations, therefore a drought can be evaluated using soil moisture conditions. In this study, SMI (Soil Moisture Index) was developed to measure a drought condition using soil moisture model and frequency analysis for return periods. Runs theory was applied to quantify the soil moisture depletions for the drought condition in terms of severity, magnitude and duration. In 1994, 1995, 2000, and 2001, Korea had experienced several severe droughts, so the SMI developed was applied to evaluate applicability in the mid-range hydrologic unit watershed scale. From the results, SMI demonstrated the drought conditions with a quite sensitive manner and can be used as an indicator to measure a drought condition.

Keywords

References

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  2. A real-time online drought broadcast system for monitoring soil moisture index vol.16, pp.3, 2012, https://doi.org/10.1007/s12205-012-1357-3