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2023 Vol.33, Issue 3 Preview Page

Research Article

Effect of the Yeongcheon Dam Waterway Tunnel, Korea, on Local Groundwater Levels

영천댐 도수터널 주변지역 지하수위 영향 분석

Gyu-Han Kim1
,
Seong-Woo Moon2
,
Yong-Seok Seo3*
김 규한1
,
문 성우2
,
서 용석3*
1Ph.D. Student, Department of Earth and Environmental Sciences, Chungbuk National University
2Post-Doctor, Department of Earth and Environmental Sciences, Chungbuk National University
3Professor, Department of Earth and Environmental Sciences, Chungbuk National University
1충북대학교 지구환경과학과 박사과정
2충북대학교 지구환경과학과 박사 후 연구원
3충북대학교 지구환경과학과 교수
*Corresponding Author
30 September 2023. pp. 461-474
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Abstract

The study area is located in Hyeonseo-myeon and Andeok-myeon of Cheongsong-gun, Korea around the Yeongcheon dam waterway tunnel, and in this paper, it is analyzed whether the groundwater level is recovered or not compared to groundwater level before waterway tunnel construction by measuring the groundwater level of 156 wells which were installed in areas near and away from the waterway tunnel. From September 2017 to August 2018, the groundwater level of the well was measured at least once a month, and as a result of groundwater level observation survey, the groundwater level of wells distributed in the directly affected zone by the waterway tunnel is relatively lower than that of the indirectly affected zone apart from the waterway tunnel. These results are estimated to be predominantly affected by the effect of waterway tunnel acting on geologic discontinuities rather than by terrain conditions, i.e. groundwater flows being leaked to the waterway tunnel through direct or indirect channels. Continuous monitoring and further investigation will be required to maintain groundwater facilities and preserve groundwater environments in the future.

Keywords
Yeongcheon dam waterway tunnel
groundwater level observation
directly affected zone
groundwater flows

본 연구에서는 경상북도 청송군 현서면과 안덕면 일원에 설치되어 있는 영천댐 도수터널 구간과 도수터널 주변지역의 지하수위를 측정하여, 도수터널 시공 이전 대비 지하수위 회복여부를 조사하였다. 2017년 9월부터 2018년 8월까지 매월 1회 이상 총 12회에 걸쳐 지하수 관정 156공에 대한 지하수위를 측정하였으며 지하수위 관측조사 결과, 직접 영향구역에 분포하는 관정의 지하수위 값이 간접 영향구역의 값에 비하여 상대적으로 낮은 수치를 보이고 있다. 이러한 결과는 지형조건보다는 지질학적 불연속면으로 작용하는 도수터널에 의한 영향, 즉 지하수 흐름이 직간접적인 경로를 통하여 도수터널로 유출되는 것에 지배적으로 영향을 받는 것으로 추정되며, 향후 지하수 시설물의 유지관리 및 지하수 환경의 보전을 위하여 지속적인 모니터링 및 추가 조사가 필요하다.

키워드
영천댐 도수터널
지하수위 측정
지하수위 회복
직접 영향구역
간접 영향구역
지하수 흐름
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 33
  • No :3
  • Pages :461-474
  • Received Date : 2023-08-16
  • Revised Date : 2023-09-14
  • Accepted Date : 2023-09-15
  • DOI :https://doi.org/10.9720/kseg.2023.3.461
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