한국수자원학회논문집 (Journal of Korea Water Resources Association)

  • 제39권7호
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  • Pages.617-626
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  • 2006
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  • 2799-8746(pISSN)
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  • 2799-8754(eISSN)
한국수자원학회 (Korea Water Resources Association)
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EOF 해석 및 다변량시계열 모형을 이용한 농업가뭄 대비능력의 평가

Evaluation of Agricultural Drought Prevention Ability Based on EOF Analysis and Multi-variate Time Series Model

  • 유철상 (고려대학교 사회환경시스템공학과) ;
  • 김대하 (고려대학교 사회환경시스템공학과) ;
  • 김상단 (부경대학교 환경시스템공학부)
  • 발행 : 2006.07.01
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초록

본 연구에서는 전국 59개 지점의 3개월 SPI 자료를 가지고 EOF를 유도하고 아울러 그 공간적 특성을 분석하였다. 또한 EOF 해석에 의해 나타난 Coefficient Time Series를 다변량 시계열 모형에 적용하여 SPI 시계열을 자료기간 10,000년으로 확장하였고 전국적인 가뭄심도를 판단하기 위해 전국 평균 지수를 이용하여 재현기간별 최대심도를 결정하였다. 마지막으로 각 대권역의 댐 유효저수량과 농경지 면적을 이용하여 농업가뭄 대비능력을 판단하였는데 재현기간 30년 가뭄에 적절히 대비할 수 있는 이수능력을 갖춘 유역은 한강유역이 유일한 것으로 파악되었다. 특히 영산강 유역은 큰 농경지 면적에 비해 저수용량이 크게 부족한 것으로 파악되었고 강우량의 크기에 민감한 농업가뭄에 가장 취약할 것으로 나타났다.

In this study 3-month SPI data from 59 stations over the Korean peninsula are analyzed by deriving and spatially characterizing the EOFs. Also, the coefficient time series of EOF are applied to the multi-variate time series model to generate the time series of 10,000 years, to average them to estimate the areal average, and to decide the maximum drought severity for given return periods. Finally, the drought prevention ability is evaluated by considering the effective storage of dam within the basin and the size of agricultural area. Especially for the return period of 30 years, only the Han river basin has the potential to overcome the drought. Other river basins like the Youngsan river basin, which has a large portion of agricultural area but less water storage, are found to be very vulnerable to the rainfall-sensitive agricultural drought.

키워드

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  2. Real-Time Drought Index for Determining Drought Conditions in Natural Water Supply System Communities vol.13, pp.5, 2013, https://doi.org/10.9798/KOSHAM.2013.13.5.365
  3. An Application of Drought Severity-Area-Duration Curves Using Copulas-Based Joint Drought Index vol.45, pp.10, 2012, https://doi.org/10.3741/JKWRA.2012.45.10.1043
  4. Drought Severity - Duration - Frequency Analysis based on KMA 1-km Resolution RCP Scenario vol.15, pp.3, 2015, https://doi.org/10.9798/KOSHAM.2015.15.3.347