Browse > Article
http://dx.doi.org/10.12652/Ksce.2021.41.6.0655

Estimation of Exploitable Groundwater in the Jinju Region by Using a Distributed Hydrologic Model  

Lee, Jeong Eun (Korea Institute of Civil engineering and building Technology)
Chung, Il-Moon (Korea Institute of Civil engineering and building Technology)
Lee, Jeongwoo (Korea Institute of Civil engineering and building Technology)
Kim, Min Gyu (Korea Institute of Civil engineering and building Technology)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.41, no.6, 2021 , pp. 655-662 More about this Journal
Abstract
This study aimed to estimate exploitable groundwater for the sustainable supply of groundwater in the Jinju region of South Gyeongsang Province. As an integrated hydrologic analysis model, SWAT-MODFLOW was used to estimate the distributed groundwater recharge in consideration of land use and soil distribution. As a result of calibration of the model, the coefficient of determination between the observed flow and the simulated flow was 0.75-0.80, which was good. The simulated groundwater recharge rate showed a spatio-temporal distribution due to heterogeneous watershed characteristics. The amount of groundwater recharge shows lower values over winter and spring, but it increases according to the pattern of precipitation in summer and autumn. The calculated average annual groundwater recharge was compared with the result using the baseflow separation method of natural flow, and the deviation of both results was small, within 3 %, confirming the validity of the estimated groundwater recharge. Exploitable groundwater is defined as the amount of recharge corresponding to low flow with 10 years of return period. Therefore, in this study, 14.2 % of the annual precipitation was found to be exploitable as a result of calculating the amount of recharge at a 10-year frequency using a statistical frequency analysis technique.
Keywords
Groundwater recharge; SWAT; MODFLOW; Exploitable groundwater; Frequency analysis;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Arnold, J. G., Williams, J. R. and Maidment, D. R. (1995). "Continuous-time water and sediment-routing model for large basin." Journal of Hydraulic Engineering, ASCE, Vol. 121. No. 2, pp. 171-183.
2 Chung, I. M., Kim, N. W. and Lee, J. W. and Sophocleous, M. (2010). "Assessing distributed groundwater recharge rate using integrated surface water-groundwater modelling: application to Mihocheon watershed, South Korea." Journal of Hydrology, Vol. 18, No. 5, pp. 1253-1264.
3 Chung, I. M., Lee, J. W., Lee, J. E. and Kim, M. S. (2019). "Method of estimating exploitable groundwater amount considering relationship between precipitation and recharge and the variation of 10-year minimum precipitation." Journal of Korea Water Resources Association, KWRA, Vol. 52, No. 6, pp. 421-427 (in Korean).   DOI
4 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.   DOI
5 Korea Soil Information System (KSIS) (2021). Soil association map, Available at: http://soil.rda.go.kr (Accessed: July 3, 2021).
6 McDonald, M. G. and Harbaugh, A. W. (1988). A modular threedimensional finite- difference ground-water flow model, Techniques of Water Resources Investigations Report, U.S. Geological Survey, Book 6, Chapter A1, p. 528 .
7 Lee, J. E., Kim, N. W., Chung, I. M. and Lee, J. (2008). "Amount of groundwater development in Chungju basin by using watershed hydrologic model and frequency analysis." Economic and Environmental Geology, Vol. 41, No. 4, pp. 443-451 (in Korean).
8 Ministry of Environment (ME) (2020). Integrated groundwater investigation in Jinju district (in Korean).
9 Nathan, R. J. and McMahon, T. A. (1990). "Evaluation of automated techniques for baseflow and recession analysis." Water Resources Research, Vol. 26, No. 7, pp. 1465-1473.   DOI
10 Ministry of Land, Infrastructure and Transport (MOLIT) (2017). Basic plan for groundwater management in Korea (in Korean).
11 Ministry of Land, Transport and Maritime Affairs (MLTM) (2014). Report on basic groundwater investigation in Jangseong district (in Korean).
12 Arnold, J. G., Allen, P. M. and Bernhardt, G. (1993). "A comprehensive surface-groundwater flow model." Journal of Hydrology, Vol. 142, No. 1-4, pp.47-69.   DOI
13 Hosking, J. R. M. (1990). "L-moment: Analysis and estimation ofdistribution using linear combi-nation of order statistics." Journal of Royal Statistical Society, Series B. Vol. 52, pp. 105-124.