Journal of Wetlands Research (한국습지학회지)

Korean Wetlands Society (한국습지학회)
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Weighting Coefficient Estimation of Vegetation Health Index for Ecological Drought Analysis

생태가뭄분석을 위한 식생건강지수의 가중치 매개변수 추정

  • Won, Jeongeun (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University) ;
  • Choi, Jeonghyeon (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University) ;
  • Lee, Okjeong (Department of Environmental Engineering, Pukyong National University) ;
  • Seo, Jiyu (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University) ;
  • Kim, Sangdan (Department of Environmental Engineering, Pukyong National University)
  • 원정은 (부경대학교 지구환경시스템과학부 (환경공학전공)) ;
  • 최정현 (부경대학교 지구환경시스템과학부 (환경공학전공)) ;
  • 이옥정 (부경대학교 환경공학과) ;
  • 서지유 (부경대학교 지구환경시스템과학부 (환경공학전공)) ;
  • 김상단 (부경대학교 환경공학과)
  • Received : 2020.08.31
  • Accepted : 2020.10.29
  • Published : 2020.11.30
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Abstract

In this study, after estimating VCI (Vegation Condition Index), TCI (Thermal Condition Index) and VHI (Vegetation Health Index) from the NDVI (Normalized Differentiation Vegetation Index) and LST (Land Surface Temperature) remotely sensed at major sites in Korea during the 2001-1919 period, the correlation between these indices and various drought indices is analyzed for the purpose of assessing the effects of ecological drought. The relative impact of VCI and TCI on vegetation health was found to vary by region. The effects of drought on vegetation in Korea's forest areas could be more clearly identified in TCI than in VCI. It is suggested that the revised VHI, reflecting the relative influence of VCI and TCI, can better explain the effects of drought on vegetation.

본 연구에서는 2001년에서 2019년 기간 동안의 우리나라 주요 지점에서 원격으로 탐사된 정규화식생지수(Normalized Difference Vegetation Index, NDVI)와 지표면온도(Land Surface Temperature, LST)로부터 식생상태지수(Vegetation Condition Index, VCI), 열상태지수(Thermal Condition Index, TCI), 식생건강지수(Vegetation Health Index, VHI)를 추정한 후, 생태학적 가뭄의 영향을 평가할 목적으로 이들 지수들과 다양한 가뭄지수들 사이의 상관성이 분석된다. VCI와 TCI가 식생건강에 미치는 상대적 영향력은 지역에 따라 달라지는 것이 발견되었다. 우리나라 산림지역의 식생에 미치는 가뭄의 영향은 VCI보다는 TCI에서 더 분명하게 식별될 수 있었다. VCI와 TCI의 상대적인 영향력이 반영되어 추정된 VHI는 식생에 미치는 가뭄의 영향을 더 잘 설명할 수 있음이 제시된다.

Keywords

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