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2025 Vol.24, Issue 1

Research Article

Analysis of Slope Hazards of Solar Power Plants in Mountain Area

산지 태양광 발전시설 지역의 산지 재해 발생 특성 분석

Ji-Ho Kim1
,
Ki-Il Song2
,
Chan-Young Yune3*
김 지호1
,
송 기일2
,
윤 찬영3*
1Non-Member, Graduate Student, Dept. of Civil and Environmental Engineering, Gangneung-Wonju National Univ., 7 Jukheon-gil, Gangneung-si, Gangwon-do 25457, Republic of Korea
2Member, Professor, Dept. of Civil Engineering, Inha Univ., 100 Inha-ro, Michuhol-gu, Incheon 22212, Republic of Korea
3Member, Professor, Dept. of Civil and Environmental Engineering, Gangneung-Wonju National Univ., 7 Jukheon-gil, Gangneung-si, Gangwon-do 25457, Republic of Korea
*Corresponding Author
30 March 2025. pp. 1-14
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Abstract

With the increasing adoption of renewable energy technologies in South Korea, the expansion of solar power plants in mountainous regions has raised concerns over slope instability and the risk of debris flows. This study analyzes the impact of solar power plants on landslide and debris flow occurrences in these regions. Geographic Information System (GIS) techniques and numerical simulation model were used to investigate slope stability and debris flow behavior under various rainfall conditions. Case studies were conducted in four domestic regions where recent landslides have occurred. The analysis revealed that steep slopes tend to form at the boundary between natural and artificial slopes during solar power plant installation, increasing the risk of slope failure during heavy rainfall. Rainfall data analysis indicated that slopes with intrinsic instability could fail with relatively low rainfall amounts. Furthermore, debris flow simulations demonstrated that landslides could transition into debris flows, causing damage to nearby roads and residential areas. It was confirmed that the slope stability assessments and debris flow analysis were needed during the design and construction of solar power plants in mountainous regions to effectively mitigate disaster risks.

Keywords
Landslide
Debris flow
Solar power plant
GIS
FLO-2D

근래에 국내에서는 신·재생에너지 기술의 도입이 증가함에 따라 산지에 태양광 발전시설이 확산되면서 사면 불안정과 토석류 발생에 대한 우려가 증가하고 있다. 이에 본 연구에서는 산지에 설치된 태양광 발전시설이 산사태 및 토석류 발생에 미치는 영향을 분석하였다. 지리정보시스템(Geographic Information System, GIS) 기법과 수치 시뮬레이션 모델을 활용하여 사면 안정성과 강우 조건에 따른 토석류 거동을 조사하였다. 최근 산사태가 발생한 국내 4개 지역을 대상으로 사례 분석을 수행하였으며, 분석 결과, 태양광 발전시설 시공 시 자연사면과 인공사면 경계부에서 급경사지가 형성되어 집중호우 시 사면 붕괴 위험이 증가하는 것으로 나타났다. 강우 자료 분석 결과, 내적으로 불안정한 사면은 비교적 적은 강우량에도 산사태가 발생할 수 있음을 확인하였다. 또한, 토석류 시뮬레이션 결과, 발생한 산사태가 토석류로 전이되어 유하하면서 인근 도로와 민가에 피해를 유발할 수 있었다. 이를 통하여 산지 태양광 발전시설의 설계 및 시공 시 사면 안정성 평가와 토석류 흐름 분석을 병행하여 재해 위험을 효과적으로 저감할 필요성이 있음을 확인하였다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 24
  • No :1
  • Pages :1-14
  • Received Date : 2024-12-20
  • Revised Date : 2025-01-14
  • Accepted Date : 2025-01-20
  • DOI :https://doi.org/10.12814/jkgss.2025.24.1.001
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