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Research Article

Analysis of groundwater hydraulic gradient and major flow direction according to monitoring well arrangement conditions in alluvium

충적층에서 관측정 배열 조건에 따른 지하수의 수리경사와 주 흐름 방향 분석

Byung-Woo Kima
,
Dong-hwan Kangb*
,
Kyeong-deok Parkc
,
Minjune Yangd
,
Jinyoung Parke
,
Jeonghyeon Byeonf
김 병우a
,
강 동환b*
,
박 경덕c
,
양 민준d
,
박 진영e
,
변 정현f
aPrincipal Researcher, K-water Research Institute, Korea Water Resources Corporation, Daejeon, Korea
bFull-time Researcher, Institute of Environmental Geosciences, Pukyong National University, Busan, Korea
cFull-time Researcher, Institute of Environmental Geosciences, Pukyong National University, Busan, Korea
dAssociate Professor, Major of Environmental Geosciences, Division of Earth and Environmental System Sciences, Pukyong National University, Busan, Korea
ePresident, Wible Co. Ltd., Busan, Korea
fResearcher, K-water Research Institute, Korea Water Resources Corporation, Daejeon, Korea
a한국수자원공사 K-water연구원 책임연구원
b부경대학교 지질환경연구소 전임연구원
c부경대학교 지질환경연구소 전임연구원
d부경대학교 지구환경시스템과학부 지구환경과학전공 부교수
e(주)와이블 대표
f한국수자원공사 K-water연구원 연구원
*Corresponding Author
28 February 2025. pp. 129-139
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Abstract

In this study, the hydraulic gradient and major flow direction according to the arrangement conditions (square, right triangle, and rectangle) of nine monitoring wells located in the alluvium were calculated and analyzed using the Devlin (2003) method, and the monitoring well arrangement that can most appropriately explain the groundwater flow in the alluvial aquifer was suggested. The average hydraulic gradient of groundwater estimated under the square arrangement (TW) condition using all observation well data was 0.0109, and the average major flow direction was 85.8364. The average hydraulic gradient estimated under the right triangular arrangement (T1~T4) condition was 0.0099~0.0123, and the average major flow direction was 79.7201~95.0048°. The average hydraulic gradient estimated under the rectangular arrangement (R1~R4) condition was 0.0094~0.0126, and the average major flow direction was 82.8661~85.7661°. As a result of analyzing the average hydraulic gradient and average major flow direction based on the square arrangement, the average hydraulic gradient showed a difference in both the right triangular and rectangular arrangement conditions, and the average major flow direction was similar to the square arrangement condition that the rectangular condition than the right triangular arrangement condition.

Keywords
Fluvial aquifer
Monitoring well arrangement
Groundwater level
Hydraulic gradient
Major flow direction

본 연구에서는 충적층에 위치한 9개 관측정의 배열 조건(정방형, 직삼각형, 직사각형)에 따른 수리경사 및 주 흐름 방향을 Devlin (2003) 방법으로 산정하고 분석하였으며, 충적 대수층에서 지하수 흐름을 가장 적정하게 설명할 수 있는 관측정 배열을 제시하였다. 모든 관측정의 자료를 이용한 정방형 배열(TW) 조건에서 산정된 지하수의 평균 수리경사는 0.0109, 평균 주 흐름 방향은 85.8364°로 나타났다. 직삼각형 배열(T1~T4) 조건에서 산정된 평균 수리경사는 0.0099~0.0123, 평균 주 흐름 방향은 79.7201~95.0048°로 나타났다. 직사각형 배열(R1~R4) 조건에서 산정된 평균 수리경사는 0.0094~0.0126, 평균 주 흐름 방향은 82.8661~85.7661°로 나타났다. 정방형 배열을 기준으로 한 평균 수리경사와 평균 주 흐름 방향을 분석한 결과, 평균 수리경사는 직삼각형 배열 조건과 직사각형 배열 조건 모두 차이를 보였으며, 평균 주 흐름 방향은 직삼각형 배열 조건보다 직사각형 배열 조건이 정방형 배열 조건에 유사하게 나타났다.

키워드
충적층
관측정 배열
지하수위
수리경사
주 흐름 방향
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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 : 58
  • No :2
  • Pages :129-139
  • Received Date : 2024-11-15
  • Revised Date : 2024-12-18
  • Accepted Date : 2024-12-26
  • DOI :https://doi.org/10.3741/JKWRA.2025.58.2.129
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