Abstract
Groundwater can flow into or out of surface water and thus can greatly affect the quantity and quality of surface water. In this study, we conducted a water quantity and quality analysis for 11 months in 2018 and 2019 to evaluate the temporal contribution of groundwater to surface water at Osongji, a small lake located in Jeonju-si, Jeollabuk-do, Korea. Groundwater fluxes and groundwater and surface water levels were measured using seepage meters and a piezometer, respectively. On-site water quality parameters, cations, and anions for groundwater and surface water were analyzed. Hydrogen and oxygen isotopes for groundwater, surface water, and rainwater were also analyzed. Groundwater influx did not correlate directly to precipitation, suggesting that it may be delayed after rainwater infiltration. Aqueous chemistry indicated that the hydrogeochemical characteristics of surface water were substantially affected by groundwater. The isotopic composition of surface water changed over time, indicating a different contribution of groundwater in different seasons. This study shows that water quantity and quality data can be used in combination to evaluate temporal changes in the groundwater contribution to surface water.
Highlights
Groundwater interacts closely with surface water within the perspective of the water cycle.In recent years, the importance of groundwater baseflow has been increasingly recognized due to the contribution of groundwater to surface water, both in terms of quantity and quality [1,2]
Groundwater flux measured by each seepage meter (A, B, C, and D) during the study period shows large differences at each location, with only groundwater influx being observed within the range of +2.2 × 10−10 –+4.9 × 10−8 m/s
Groundwater influx did not increase immediately after precipitation measured by each seepage meter (A, B, C, and D) during the study period shows large differences at each location, with only groundwater influx being observed within the range of +2.2 × 10−10–+4.9 ×
Summary
The importance of groundwater baseflow has been increasingly recognized due to the contribution of groundwater to surface water, both in terms of quantity and quality [1,2]. Groundwater and surface water are often managed separately, and the management of surface water has largely focused on surface runoff, which has an immediate effect on surface water. The contribution of groundwater flux to surface water varies according to seasonality [3,4,5]. In particular, the contribution of groundwater baseflow to river flow can be greater than that of direct runoff [6]. Barkle et al [4] showed that the groundwater contribution to the Pukemanga
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
