KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
권호 표지
DOI QR코드

DOI QR Code

Estimation of Distributed Groundwater Recharge in Jangseong District by using Integrated Hydrologic Model

통합수문모형을 이용한 장성지역의 분포형 지하수 함양량 추정

  • Chung, Il-Moon (Korea Institute of Civil Engineering and Building Technology) ;
  • Park, Seunghyuk (Jeju Province Development Corporation) ;
  • Lee, Jeong Eun (Korea Institute of Civil Engineering and Building Technology) ;
  • Kim, Min Gyu (Korea Institute of Civil Engineering and Building Technology)
  • 정일문 (한국건설기술연구원 국토보전연구본부) ;
  • 박승혁 (제주특별자치도개발공사) ;
  • 이정은 (한국건설기술연구원 국토보전연구본부) ;
  • 김민규 (한국건설기술연구원 국토보전연구본부)
  • Received : 2018.06.18
  • Accepted : 2018.07.09
  • Published : 2018.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

As groundwater recharge shows the heterogeneity in space and time due to land use and soil types, estimating daily recharge by integrated hydrologic analysis is needed. In this work, the SWAT-MODFLOW model was applied to compute daily based groundwater recharge in Jangseong region. The accuracy of the model was evaluated by comparing the observed and calculated values of the unsteady groundwater flow levels after calibrating the observed and calculated flow rates of the stream for a hydrological analysis. The estimated hydrologic components showed a strong correlation with each other and significant spatial variations regarding the groundwater recharge rate in accordance with the heterogeneous watershed characteristics such as subbasin slope, land use, and soil type. Overall, it was concluded that the coupled hydrologic models were capable of simulating the spatial variation with respect to the hydrologic component process in surface water and groundwater. The average recharge rate was estimated at approximately 20.8%.

지하수 함양은 기후조건, 토지이용, 수리지질학적 비균질성에 의해 시공간적인 변동성을 나타내므로 통합수문해석에 의한 지하수 함양량의 추정이 필요하다. 본 연구에서는 SWAT-MODFLOW 연계모형을 활용하여 장성지역의 물리적 기반의 일단위 지하수 함양량을 산정하였다. 수문분석은 하천에서의 관측유량과 계산유량의 검보정에 이어 부정류 지하수위의 계산값과 관측값의 비교를 통해 모형의 정확도를 평가하였다. 추정된 수문성분은 상호간에 서로 관련이 깊고, 유역내의 비균질한 인자들인 소유역 경사, 토지이용, 토양종류에 따라 지하수 함양량의 공간적 변동이 크게 나타났다. 통합수문모형은 지표수 및 지하수 수문성분 프로세스의 시공간적 변화를 잘 모의하고 있는 것으로 평가되었다. 추정된 함양량의 평균은 약 20.8%로 나타났다.

Keywords

References

  1. Arnold, J. G., Allen, P. M. and Bernhardt, G. (1993). "A comprehensive surface-groundwater flow model." Journal of Hydrology, Vol. 142, pp. 47-69. https://doi.org/10.1016/0022-1694(93)90004-S
  2. Arnold, J. G., Williams, J. R. and Maidment, D. R. (1995). "Continuoustime water and sediment-routing model for large basin." Journal of Hydraulic Engineering, ASCE, Vol. 121, No. 2, pp. 171-183. https://doi.org/10.1061/(ASCE)0733-9429(1995)121:2(171)
  3. Available at: http://soil.rda.go.kr
  4. Available at: https://www.groundwater.or.kr
  5. Chung, I. M., Kim, N. W., Lee, J. and Sophocleous, M. (2010). "Assessing distributed groundwater recharge rate using integrated surface water-groundwater modelling: Application to Mihocheon watershed, South Korea." Hydrogeology Journal, Vol. 18, pp. 1253-1264. https://doi.org/10.1007/s10040-010-0593-1
  6. Danish Hydraulic Institute (1999). MIKE SHE Water Movement User Manual.
  7. Kim, N. W., Chung, I. M., Won, Y. S. and Arnold, J. G. (2008). "Development and application of the integrated SWAT-MODFLOW model." Journal of Hydrology, Vol. 356, pp. 1-16. https://doi.org/10.1016/j.jhydrol.2008.02.024
  8. McDonald, M. G. and Harbaugh, A. W. (1988). A Modular Three-Dimensional Finite- Difference Ground-water Flow Model, Techniques of Water Resources Investigations Report, U.S. Geological Survey, Book 6, Chapter A1, p. 528.
  9. MOCT (2002). Basic Plan for Groundwater Management in Korea.
  10. Neitsch, S. L., Arnold, J. G., Kiniry, J. R. and Williams, J. R. (2001). Soil and Water Assessment Tool Version 2000, Agricultural Research Service, Texas Agricultural Experiment Station, Temple, Texas.
  11. SDI Environmental Service, Inc. (1997). Water Resource Evaluation and Integrated Hydrologic Model of the Central Northern Tampa Bay Region, Final Report ISGW/CNTB Model SDE Project No. WCF-690, Prepared for West Coast Regional Water Supply Authority, Clearwater Florida.