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http://dx.doi.org/10.12652/Ksce.2018.38.4.0517

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

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)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.38, no.4, 2018 , pp. 517-526 More about this Journal
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%.
Keywords
Groundwater recharge; SWAT; MODFLOW; River-Aquifer Interaction;
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