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2024 Vol.34, Issue 2 Preview Page

Research Article

Estimation of Groundwater Availability by Using the SWAT-K Model in Yeoncheon District, South Korea

SWAT-K 모형을 이용한 연천지역의 지하수 개발가능량 추정

Jeong Eun Lee1
,
Min-Gyu Kim2
,
Il-Moon Chung3*
이 정은1
,
김 민규2
,
정 일문3*
1Senior Researcher, Department of Hydro Science and Engineering, KICT
2Research Specialist, Department of Hydro Science and Engineering, KICT
3Senior Research Fellow, Department of Hydro Science and Engineering, KICT
1한국건설기술연구원 수자원하천연구본부 수석연구원
2한국건설기술연구원 수자원하천연구본부 전임연구원
3한국건설기술연구원 수자원하천연구본부 선임연구위원
*Corresponding Author
30 June 2024. pp. 263-277
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Abstract

The availability of groundwater in the Yeoncheon area, South Korea, was estimated using the distributed hydrological model SWAT-K to calculate recharge rates based on land use and soil distribution. Model calibration and validation results were consistent between observed and simulated streamflows, with coefficients of determination of 0.75~0.97. Calculated groundwater recharge rates varied temporospatially, with lower rates in winter and spring than in summer. Estimated recharge rates were compared with the baseflow index of natural streamflow to assess the validity of estimated recharge amounts. Groundwater development potential was determined by calculating the recharge amount for a 10-year period by statistical frequency analysis, confirming it to be 11.5% of annual precipitation.

Keywords
groundwater recharge
SWAT-K
potential groundwater availability
frequency analysis

본 연구에서는 연천지역의 개발 가능한 지하수의 양을 추정하기 위해 분포형 수문모형 SWAT-K를 이용하여 토지이용, 토양분포 특성에 따른 함양량을 산정하였다. 모형의 검보정 결과 관측유량과 모의유량의 결정계수가 0.75~0.97로 양호하게 나타났으며 계산된 지하수 함양량은 겨울과 봄에 걸쳐 낮은 함양률을, 여름철에는 높은 함양률을 나타내는 시공간적 특성을 보였다. 계산된 연평균 함양률을 자연유량의 기저유출률과 비교하여 추정된 함양량의 타당성을 검토하였다. 지하수 개발가능량은 통계학적 빈도해석 기법을 이용한 10년 빈도 갈수시의 함양량으로 산정하여 연강수량의 11.5%인 것을 확인할 수 있었다.

키워드
지하수 함양
SWAT-K
지하수 개발가능량
빈도해석
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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 : 34
  • No :2
  • Pages :263-277
  • Received Date : 2024-05-27
  • Revised Date : 2024-06-24
  • Accepted Date : 2024-06-25
  • DOI :https://doi.org/10.9720/kseg.2024.2.263
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