Assessment of Spatiotemporal Groundwater Recharge Distribution Using SWAT-MODFLOW Model and Transient Water Table Fluctuation Method
Recharge is a crucial section of water balance for both surface and subsurface models in water resource assessment. However, quantifying its spatiotemporal distribution at a regional scale poses a significant challenge. Empirical and numerical modeling are the most commonly used methods at the water...
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MDPI AG
2023-06-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/11/2112 |
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| author | Hiyaw Hatiya Ware Tarekegn Dejen Mengistu Bisrat Ayalew Yifru Sun Woo Chang Il-Moon Chung |
| author_facet | Hiyaw Hatiya Ware Tarekegn Dejen Mengistu Bisrat Ayalew Yifru Sun Woo Chang Il-Moon Chung |
| author_sort | Hiyaw Hatiya Ware |
| collection | DOAJ |
| description | Recharge is a crucial section of water balance for both surface and subsurface models in water resource assessment. However, quantifying its spatiotemporal distribution at a regional scale poses a significant challenge. Empirical and numerical modeling are the most commonly used methods at the watershed scales. However, integrated models inherently contain a vast number of unknowns and uncertainties, which can limit their accuracy and reliability. In this work, we have proposed integrated SWAT-MODFLOW and Transient Water Table Fluctuation Method (TWTFM) to evaluate the spatiotemporal distribution of groundwater recharge in Anyang watershed, South Korea. Since TWTFM also uses SWAT model percolation output data, calibration was performed for individual models and a coupled model. The coupled model was calibrated using daily streamflow and hydraulic head. The SWAT-MODFLOW model performed well during the simulation of streamflow compared to the SWAT model. The study output showed that the study watershed had significant groundwater recharge variations during the simulated period. A significant amount of recharge happens in the wet season. It contributes a significant amount of the average annual precipitation of the region. The direct flow components (surface and lateral) showed significant contributions when the water balance components were evaluated in the region. TWTFM showed a glimpse to estimate recharge, which requires representative monitoring wells in the study region. Comprehensively, the SWAT-MODFLOW model estimated groundwater recharge with reasonable accuracy in the region. |
| first_indexed | 2024-03-11T02:53:54Z |
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| id | doaj.art-8d27f22f760c4cf4a8b3ee1f15b18e91 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T02:53:54Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-8d27f22f760c4cf4a8b3ee1f15b18e912023-11-18T08:47:45ZengMDPI AGWater2073-44412023-06-011511211210.3390/w15112112Assessment of Spatiotemporal Groundwater Recharge Distribution Using SWAT-MODFLOW Model and Transient Water Table Fluctuation MethodHiyaw Hatiya Ware0Tarekegn Dejen Mengistu1Bisrat Ayalew Yifru2Sun Woo Chang3Il-Moon Chung4Civil and Environmental Engineering Department, University of Science and Technology (UST), Daejeon 34113, Republic of KoreaCivil and Environmental Engineering Department, University of Science and Technology (UST), Daejeon 34113, Republic of KoreaAgriculture and Life Sciences Research Institute, Kangwon National University, Chuncheon-si 24341, Republic of KoreaCivil and Environmental Engineering Department, University of Science and Technology (UST), Daejeon 34113, Republic of KoreaCivil and Environmental Engineering Department, University of Science and Technology (UST), Daejeon 34113, Republic of KoreaRecharge is a crucial section of water balance for both surface and subsurface models in water resource assessment. However, quantifying its spatiotemporal distribution at a regional scale poses a significant challenge. Empirical and numerical modeling are the most commonly used methods at the watershed scales. However, integrated models inherently contain a vast number of unknowns and uncertainties, which can limit their accuracy and reliability. In this work, we have proposed integrated SWAT-MODFLOW and Transient Water Table Fluctuation Method (TWTFM) to evaluate the spatiotemporal distribution of groundwater recharge in Anyang watershed, South Korea. Since TWTFM also uses SWAT model percolation output data, calibration was performed for individual models and a coupled model. The coupled model was calibrated using daily streamflow and hydraulic head. The SWAT-MODFLOW model performed well during the simulation of streamflow compared to the SWAT model. The study output showed that the study watershed had significant groundwater recharge variations during the simulated period. A significant amount of recharge happens in the wet season. It contributes a significant amount of the average annual precipitation of the region. The direct flow components (surface and lateral) showed significant contributions when the water balance components were evaluated in the region. TWTFM showed a glimpse to estimate recharge, which requires representative monitoring wells in the study region. Comprehensively, the SWAT-MODFLOW model estimated groundwater recharge with reasonable accuracy in the region.https://www.mdpi.com/2073-4441/15/11/2112SWAT-MODFLOWgroundwater rechargePESTWater Table Fluctuation |
| spellingShingle | Hiyaw Hatiya Ware Tarekegn Dejen Mengistu Bisrat Ayalew Yifru Sun Woo Chang Il-Moon Chung Assessment of Spatiotemporal Groundwater Recharge Distribution Using SWAT-MODFLOW Model and Transient Water Table Fluctuation Method Water SWAT-MODFLOW groundwater recharge PEST Water Table Fluctuation |
| title | Assessment of Spatiotemporal Groundwater Recharge Distribution Using SWAT-MODFLOW Model and Transient Water Table Fluctuation Method |
| title_full | Assessment of Spatiotemporal Groundwater Recharge Distribution Using SWAT-MODFLOW Model and Transient Water Table Fluctuation Method |
| title_fullStr | Assessment of Spatiotemporal Groundwater Recharge Distribution Using SWAT-MODFLOW Model and Transient Water Table Fluctuation Method |
| title_full_unstemmed | Assessment of Spatiotemporal Groundwater Recharge Distribution Using SWAT-MODFLOW Model and Transient Water Table Fluctuation Method |
| title_short | Assessment of Spatiotemporal Groundwater Recharge Distribution Using SWAT-MODFLOW Model and Transient Water Table Fluctuation Method |
| title_sort | assessment of spatiotemporal groundwater recharge distribution using swat modflow model and transient water table fluctuation method |
| topic | SWAT-MODFLOW groundwater recharge PEST Water Table Fluctuation |
| url | https://www.mdpi.com/2073-4441/15/11/2112 |
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