| Title |
Analysis of Spatiotemporal Changes in Groundwater Recharge and Baseflow using SWAT and BFlow Models |
| Authors |
이지민 ( Ji Min Lee ) ; 박윤식 ( Youn Shik Park ) ; 정영훈 ( Young Hun Jung ) ; 조재필 ( Jae Pil Cho ) ; 양재의 ( Jae Eui Yang ) ; 이관재 ( Gwan Jae Lee ) ; 김기성 ( Ki Sung Kim ) ; 임경재 ( Kyoung Jae Lim ) |
| DOI |
https://doi.org/10.15681/KSWE.2014.30.5.549 |
| Keywords |
Baseflow; Climate change; Groundwater; RCP Scenario; SWAT |
| Abstract |
Occurrence frequency of flood and drought tends to increase in last a few decades, leading to social and economic damage since the abnormality of climate changes is one of the causes for hydrologic facilities by exceedance its designed tolerance. Soil and Water Assessment Tool (SWAT) model was used in the study to estimate temporal variance of groundwater recharge and baseflow. It was limited to consider recession curve coefficients in SWAT model calibration process, thus the recession curve coefficient was estimated by the Baseflow Filter Program (BFLOW) before SWAT model calibration. Precipitation data were estimated for 2014 to 2100 using three models which are GFDL-ESM2G, IPSL-CM5A-LR, and MIROC-ESM with Representative Concentration Pathways (RCP) scenario. SWAT model was calibrated for the Soyang watershed with NSE of 0.83, and R2 of 0.89. The percentage to precipitation of groundwater recharge and baseflow were 27.6% and 17.1% respectively in 2009. Streamflow, groundwater recharge, and baseflow were estimated to be increased with the estimated precipitation data. GFDL-ESM2g model provided the most large precipitation data in the 2025s, and IPSL-CM5A-LR provided the most large precipitation data in the 2055s and 2085s. Overall, groundwater recharge and baseflow displayed similar trend to the estimated precipitation data. |