| Title |
Estimation of Distributed Groundwater Recharge in Jangseong District by using Integrated Hydrologic Model |
| Authors |
정일문(Chung, Il-Moon) ; 박승혁(Park, Seunghyuk) ; 이정은(Lee, Jeong Eun) ; 김민규(Kim, Min Gyu) |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.4.0517 |
| Keywords |
지하수 함양;하천-대수층 상호작용 Groundwater recharge;SWAT;MODFLOW;River-Aquifer Interaction |
| 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%. |