Effects of Baekje Weir Operation on the Stream–Aquifer Interaction in the Geum River Basin, South Korea
| Autor: | Hyeonju Lee, Soo Young Cho, Dong-Hun Kim, Min-Ho Koo, Yong Hwa Oh, Byong Wook Cho, Yongcheol Kim, Jung-Yun Lee, Yongje Kim |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Hydrology
geography lcsh:TD201-500 geography.geographical_feature_category lcsh:Hydraulic engineering Groundwater flow stream–aquifer interaction MODFLOW Geography Planning and Development Drainage basin Baekje weir Aquifer Aquatic Science Biochemistry Hydraulic structure lcsh:Water supply for domestic and industrial purposes Visual MODFLOW lcsh:TC1-978 Weir Environmental science Groundwater discharge Groundwater weir operation Water Science and Technology |
| Zdroj: | Water, Vol 12, Iss 2984, p 2984 (2020) Water Volume 12 Issue 11 |
| ISSN: | 2073-4441 |
| Popis: | Hydraulic structures have a significant impact on riverine environment, leading to changes in stream&ndash aquifer interactions. In South Korea, 16 weirs were constructed in four major rivers, in 2012, to secure sufficient water resources, and some weirs operated periodically for natural ecosystem recovery from 2017. The changed groundwater flow system due to weir operation affected the groundwater level and quality, which also affected groundwater use. In this study, we analyzed the changes in the groundwater flow system near the Geum River during the Baekje weir operation using Visual MODFLOW Classic. Groundwater data from 34 observational wells were evaluated to analyze the impact of weir operation on stream&ndash aquifer interactions. Accordingly, the groundwater discharge rates increased from 0.23 to 0.45 cm/day following the decrease in river levels owing to weir opening, while the hydrological condition changed from gaining to losing streams following weir closure. The variation in groundwater flow affected the groundwater quality during weir operation, changing the groundwater temperature and electrical conductivity (EC). Our results suggest that stream&ndash aquifer interactions are significantly affected by weir operation, consequently, these repeated phenomena could influence the groundwater quality and groundwater use. |
| Databáze: | OpenAIRE |
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