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    Evaluation of Temporal Contribution of Groundwater to a Small Lake through Analyses of Water Quantity and Quality
    Water (2020)
    Jeong-A KimSung‐Wook JeenJeonghoon LeeKyung-Seok KoDong‐Chan Koh
    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.
    Piezometer
    Rainwater Harvesting
    Infiltration (HVAC)
    Groundwater discharge
    Citations (17)
    High biodiversity and distinct assembly patterns of microbial communities in groundwater compared with surface water
    The Science of The Total Environment (2022)
    Lei JiLu ZhangZhi WangXue ZhuKang Ning
    Citations (21)
    Is Your Groundwater Under the Influence of Surface Water?
    Opflow (1994)
    Frederick W. Pontius
    Groundwater sources under direct influence of surface water must comply with the Surface Water Treatment Rule (SWTR). Groundwater sources that are not directly influenced by surface water are not subject to the rule. When is groundwater influenced by surface water, and when is it “directly” influenced? These are key questions for water suppliers that use groundwater from an aquifer that is recharged by a surface water source. This brief article clarifies “direct influence.”
    Citations (0)
    Using new mass balance methods to estimate gross surface water and groundwater exchange with naturally occurring tracer 222Rn in data poor regions: a case study in northwest China
    Hydrological Processes (2014)
    Xiaosi SuWei XuFengtian YangPucheng Zhu
    Abstract Given that the concentration of 222 Rn in groundwater is much higher than that in surface water and that its radioactive half‐life (3.83 d) is short, 222 Rn is an effective tracer of groundwater–surface water interactions. In this study, a new mass balance method is presented, which can be used to estimate specific groundwater–surface water interactions within a river reach. Three possible situations of interaction between groundwater and surface water are considered, and equations based on the mass conservation of 222 Rn are formulated for judging specific groundwater–surface water interaction processes and for calculating water flux. A case study was conducted for the Nalenggele River, Northwest China, to demonstrate the usefulness of this method. Samples of river water and groundwater containing 222 Rn were collected from the study area to estimate the interactions between groundwater and surface water. The amount of water exchanged during these interactions was estimated and the results show that transformations between groundwater and surface water are frequent along the stream. The 222 Rn mass balance method is highly sensitive for studying such interactions, even in areas for which conventional hydrologic data are sparse. Copyright © 2014 John Wiley & Sons, Ltd.
    TRACER
    Water balance
    Citations (40)