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2026 Vol.59, Issue 7S-1 Preview Page
Analysis of the effects of the dam and meteorological variables on riparian vegetation in the Yeongju Dam watershed

영주댐 유역에서 댐과 기상 변수가 수변 식생에 미치는 영향 분석

Yeonggyo Joa
,
Haeun Jungb
,
Jiyu Seoc
,
Sangdan Kimd*
조 영교a
,
정 하은b
,
서 지유c
,
김 상단d*
aMaster Student, Division of Earth Environmental System Science, Pukyong National University, Busan, Korea
bPh.D Candidate, Division of Earth Environmental System Science, Pukyong National University, Busan, Korea
cPh.D Candidate, Division of Earth Environmental System Science, Pukyong National University, Busan, Korea
dProfessor, Division of Earth Environmental System Science, Pukyong National University, Busan, Korea
a국립부경대학교 지구환경시스템과학부 석사과정
b국립부경대학교 지구환경시스템과학부 박사수료
c국립부경대학교 지구환경시스템과학부 박사수료
d국립부경대학교 지구환경시스템과학부 교수
*Corresponding Author
31 July 2026. pp. 783-792
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Abstract

This study investigated the effects of the Yeongju Dam on riparian vegetation by analyzing Landsat-derived Normalized Difference Vegetation Index (NDVI) data for the pre-dam period (2005-2012) and the post-dam period (2017-2024). The results showed that, except for September, mean NDVI values increased significantly following dam construction, with particularly pronounced enhancements during the low-flow season. Beta regression results indicated that temperature exerted the greatest influence on NDVI variability, while the dam factor emerged as the second most important determinant. Precipitation generally exhibited a minor contribution, although it played a significant role in certain localities. Patterns of variable importance were largely consistent between upstream and downstream reaches, yet more pronounced dam effects were observed in specific upstream riparian zones. Collectively, these findings suggest that although climate remains the dominant driver of vegetation dynamics, dam operation substantially contributes to hydrological stabilization during dry periods and thereby enhances the resilience of riparian ecosystems.

Keywords
NDVI
Yeongju Dam
Riparian Vegetation
Beta regression

본 연구는 영주댐 건설이 수변 식생에 미치는 영향을 규명하기 위해 댐 건설 전(2005-2012년)과 후(2017-2024년)의 Landsat 기반 NDVI (Normalized Difference Vegetation Index, NDVI)자료를 분석하였다. 분석 결과, 9월을 제외한 모든 달에서 댐 건설 후 NDVI 평균값이 유의하게 증가하였으며, 특히 갈수기에 뚜렷한 향상이 나타났다. 베타 회귀 분석에서는 기온이 NDVI 변동에 가장 큰 영향을 주었고, 댐 요인이 두번째로 중요한 요인으로 확인되었으며, 강수량은 전반적으로 낮은 중요도를 보였으나 일부 픽셀에서는 주요하게 작용하였다. 변수 중요도 패턴은 상류와 하류에서 전반적으로 유사하였으나, 일부 상류 수변 지역에서는 댐 효과가 더 뚜렷하게 나타났다. 이러한 결과는 기후가 식생 생장을 지배하는 주요 요인임에도 불구하고, 댐 운영이 갈수기 수문 안정화 및 수변 식생 유지에 중요한 역할을 수행함을 시사한다.

키워드
NDVI
영주댐
수변 식생
베타 회귀
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Information
  • Publisher :KOREA WATER RESOURECES ASSOCIATION
  • Publisher(Ko) :한국수자원학회
  • Journal Title :Journal of Korea Water Resources Association
  • Journal Title(Ko) :한국수자원학회 논문집
  • Volume : 59
  • No :7
  • Pages :783-792
  • Received Date : 2025-10-13
  • Revised Date : 2025-11-17
  • Accepted Date : 2025-11-18
  • DOI :https://doi.org/10.3741/JKWRA.2026.59.S-1.783
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