Using stable isotopes and tritium to delineate groundwater flow systems and their relationship to streams in the Geum River basin, Korea

Jung, Youn Young; Koh, Dong‐Chan; Yoon, Yoon Yeol; Kwon, Hong Il; Heo, Joonghyeok; Ha, Kyoochul; Yun, Seong Taek

doi:10.1016/j.jhydrol.2019.03.084

Cited by 25 publications

(6 citation statements)

References 91 publications

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“…7) may reflect very local input of regional groundwater or older near-river waters being flushed into the stream during the early stages of rainfall. Unlike in some catchments (Tsujimura et al, 2007;Birks et al, 2019;Jung et al, 2019), the major ion and 440 stable isotope geochemistry of regional groundwater and near-river water are similar (Figs. 3 and 4; Tables S1 and S2).…”

mentioning

confidence: 89%

“…Unlike tracers such as chlorofluorocarbons, and SF6, 14 C, and 3 He, its abundance is not affected by degassing or 100 geochemical or biogeochemical reactions. This allows 3 H to be used to estimate MTTs of shallow groundwater, water from the unsaturated zone and stream water (e.g., Morgenstern et al, 2010;Duvert et al, 2016;Jung et al, 2019). Due to atmospheric nuclear tests, 3 H activities in rainfall reached a peak in the 1950s and 1960s (the "bomb pulse").…”

Section: Documenting Mean Transit Timesmentioning

confidence: 99%

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Using geochemistry to understand the sources and mean transit times of stream water in an intermittent river system: the upper Wimmera River, southeast Australia

Zhou

Cartwright

Morgenstern

2022

Preprint

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Abstract. Determining the mean transit times (MTTs) and water sources in catchments at different flow conditions helps better understand river functioning, manage riverine system health and water resources, and discern the responses to climate change and global water stress. Despite being common in a range of environments, understanding of MTTs and variable water sources in intermittent streams remain incomplete compared to perennial streams. Major ion geochemistry, stable isotopes, 14C, 3H and were used in this study to identify water sources and MTTs of a periodically-intermittent river from southeast Australia at different flow conditions, including zero-flow periods. The disconnected pool waters during the zero-flow period in the summer months of 2019 had 3H activities of 0.64 to 3.29 TU. These and the variations in total dissolved solids and stable isotopes imply that these pools contained a mixture of groundwater and younger evaporated stream water. 3H activities during the high-flow period in July 2019 were 1.85 to 3.00 TU, yielding MTTs of up to 17 years. The 3H activities at moderate and low-flow conditions in September and November 2019 ranged from 2.26 to 2.88 TU, implying MTTs of 1.6 to 7.8 years. Regional groundwater near the Wimmera River has 3H activities of < 0.02 to 0.45 TU and 14C activities of 57 to 103 pMC and is not recharged by the river at high flows. The Wimmera River and other intermittent streams in southeast Australia are sustained by smaller volumes of younger catchment waters than comparable perennials streams, indicating that near-river stores have significant impacts on maintaining streamflow during low-flow periods than older deeper regional groundwater. These smaller reservoirs result in the intermittent streams being more susceptible to changes of climate and streamflow and necessitate protection of near-river corridors to maintain the health of the riverine systems.

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mentioning

confidence: 89%

Section: Documenting Mean Transit Timesmentioning

confidence: 99%

Using geochemistry to understand the sources and mean transit times of stream water in an intermittent river system: the upper Wimmera River, southeast Australia

Zhou

Cartwright

Morgenstern

2022

Preprint

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“…This allows 3 H to be used to estimate MTTs of shallow groundwater, water from the unsaturated zone, and stream water (e.g. Morgenstern et al, 2010;Duvert et al, 2016;Jung et al, 2019). Due to atmospheric nuclear tests, 3 H activities in rainfall reached a peak in the 1950s and 1960s (the "bomb pulse").…”

Section: Documenting Mean Transit Timesmentioning

confidence: 99%

“…the Tambo River: Unland et al, 2015) and is a common feature in many river systems (sometimes referred to as the old water paradox: Kirchner, 2003;. Unlike in some catchments (Tsujimura et al, 2007;Birks et al, 2019;Jung et al, 2019), the major ion and stable isotope geochemistry of regional groundwater and near-river water are similar (Figs. 3 and 4; Tables S1 and S2).…”

Section: Identification Of Water Sourcesmentioning

confidence: 99%

“…The water that sustains river flow may have residence times ranging from a few days to several centuries. Younger water may be derived from stores in the shallow near-river environment (such as surface runoff, water stored in the soil, and interflow), while regional groundwater represents a large store of older water (Soulsby et al, 2000;McGuire and Mc-Donnell, 2006;Stewart et al, 2010;Cartwright and Morgenstern, 2015;Duvert et al, 2016;Jung et al, 2019). However, relatively little is known about the timescale of water flow in most catchments, and whether water of different ages and from different stores contributes to rivers at different flow conditions.…”

Section: Introductionmentioning

confidence: 99%

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Sources and mean transit times of stream water in an intermittent river system: the upper Wimmera River, southeast Australia

Zhou

Cartwright²,

Morgenstern³

2022

Hydrol. Earth Syst. Sci.

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Abstract. Determining the mean transit times (MTTs) and water sources in catchments at different flow conditions helps better understand river functioning, and manage river health and water resources. Despite being common in a range of environments, the MTTs and water sources in intermittent streams are much less well understood compared to perennial streams. Major ion geochemistry, stable isotopes, 14C, and 3H were used in this study to identify water sources and MTTs of the periodically intermittent upper Wimmera River from southeast Australia at different flow conditions, including zero-flow periods. The disconnected pool waters during the zero-flow period in the summer months of 2019 had 3H activities of 0.64 to 3.29 TU. These and the variations in total dissolved solids and stable isotopes imply that these pools contained a mixture of older groundwater and younger stream water impacted by evaporation. 3H activities during the high-flow period in July 2019 were 1.85 to 3.00 TU, yielding MTTs of up to 17 years. The 3H activities at moderate and low-flow conditions in September and November 2019 ranged from 2.26 to 2.88 TU, implying MTTs of 1.6 to 7.8 years. Regional groundwater near the Wimmera River had 3H activities of < 0.02 to 0.45 TU and 14C activities of 57 to 103 pMC, and was not recharged by the river at high flows. The Wimmera River and other intermittent streams in southeast Australia are sustained by younger catchment waters from relatively small near-river stores than comparable perennial streams, which have older deeper regional groundwater inputs. This results in these intermittent streams being more susceptible to short-term changes in climate and necessitates the protection of near-river corridors to maintain the health of the riverine systems.

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Refining the origin of thermal water using stable isotope, hydrochemistry and GIS approaches in Jiaoxi, Taiwan

Peng,

Lee,

Zhan

et al. 2024

Hydrological Processes

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Comprehending the recharge of thermal springs is crucial for preserving the water quality of such springs. However, limited groundwater well data in mountainous areas presents a challenge to determining thermal‐spring recharge areas. This study analyzes the isotopes (δ2H and δ18O) and major ions in rainwater, streamwater, mountain groundwater and thermal spring water in Jiaoxi, located near Taiwan's largest city, Taipei. The results of the isotope‐elevation relationship and GIS recharge analysis indicate that the thermal spring water originated from a remote mountain at elevations of approximately 1170–1480 m, rather than the upstream watershed. The thermal spring water was divided into two groups based on the carbonate saturation index (SI) and isotope composition: the foothill group, which had a positive SI and lower δ value, and the downstream group, which had a negative SI and higher δ value. This study improved the conceptual model of the thermal flow path by demonstrating that the recharge of thermal water is a transboundary regional flow and that the foothill thermal water does not mix with the meteoric water. The revised model also highlights the role of structural lineament trends (faults, fractures and folds) in the movement of regional flow in fractured mountain blocks.

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Using stable isotopes and tritium to delineate groundwater flow systems and their relationship to streams in the Geum River basin, Korea

Cited by 25 publications

References 91 publications

Using geochemistry to understand the sources and mean transit times of stream water in an intermittent river system: the upper Wimmera River, southeast Australia

Using geochemistry to understand the sources and mean transit times of stream water in an intermittent river system: the upper Wimmera River, southeast Australia

Sources and mean transit times of stream water in an intermittent river system: the upper Wimmera River, southeast Australia

Refining the origin of thermal water using stable isotope, hydrochemistry and GIS approaches in Jiaoxi, Taiwan

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