Chemical separation of the discharge generated by artificial rain-on-snow experiments in a snowpack

Lee, Jeong-Hoon; Ham, Ji-Young; Kim, Hyerin

doi:10.14770/jgsk.2016.52.2.113

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…Moreover, since the isotope composition of water varies among the components of the water cycle, isotope measurement makes it possible to identify the source of water masses and determine their interrelationships [42]. In particular, because stream water has a complicated relationship between rainfall (new water) and groundwater (old water), isotope composition is a useful tool for determining mixing patterns and relative contribution rates via hydrograph separation [26,38].…”

Section: Stable Water Isotopesmentioning

confidence: 99%

“…To this end, studies on stable water isotopes in the atmospheric source must first be conducted in order to form a basis for understanding and predicting the movement of contaminants in the groundwater flowpath [16]. For the past 40 years, many studies have been conducted using the hydrograph separation technique through stable water isotopes or conservative chemical tracers to investigate the movement of water components such as groundwater, rainfall, snowmelt, and soil water in the stream water [16,[19][20][21][22][23][24][25][26]. In particular, Ladouche et al [20] investigated the streamflow components using hydrograph separation with stable water isotopes, major chemical parameters, and dissolved organic carbon (DOC).…”

Section: Introductionmentioning

confidence: 99%

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Stable Isotopes of Water and Nitrate for the Identification of Groundwater Flowpaths: A Review

Jung

Koh

Kim³

et al. 2020

Water

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Nitrate contamination in stream water and groundwater is a serious environmental problem that arises in areas of high agricultural activities or high population density. It is therefore important to identify the source and flowpath of nitrate in water bodies. In recent decades, the dual isotope analysis (δ15N and δ18O) of nitrate has been widely applied to track contamination sources by taking advantage of the difference in nitrogen and oxygen isotope ratios for different sources. However, transformation processes of nitrogen compounds can change the isotopic composition of nitrate due to the various redox processes in the environment, which often makes it difficult to identify contaminant sources. To compensate for this, the stable water isotope of the H2O itself can be used to interpret the complex hydrological and hydrochemical processes for the movement of nitrate contaminants. Therefore, the present study aims at understanding the fundamental background of stable water and nitrate isotope analysis, including isotope fractionation, analytical methods such as nitrate concentration from samples, instrumentation, and the typical ranges of δ15N and δ18O from various nitrate sources. In addition, we discuss hydrograph separation using the oxygen and hydrogen isotopes of water in combination with the nitrogen and oxygen isotopes of nitrate to understand the relative contributions of precipitation and groundwater to stream water. This study will assist in understanding the groundwater flowpaths as well as tracking the sources of nitrate contamination using the stable isotope analysis in combination with nitrate and water.

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Section: Stable Water Isotopesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Stable Isotopes of Water and Nitrate for the Identification of Groundwater Flowpaths: A Review

Jung

Koh

Kim³

et al. 2020

Water

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A review on hydrograph separation using isotopic tracers

Lee¹

2017

JGSK

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Isotopic Hydrograph Separation Using Artificial Rain-on-snow Experiments and Its Implications by Each Tracer

Lee¹

2016

Ocean and Polar Research

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Many studies using tracers have been conducted to understand a physical process in a system. Rain-on-snow could accelerate snowmelt processes, which influences the hydrological process in both temperate and polar regions. Hydrological and ecological conditions will be affected by the amount and timing of discharge reaching the bottom of a snowpack. The discharge consists of the rain-on-snow, pore water penetrating into the snowpack and natural meltwater. In this study, after a rain-on-snow experiment, we conducted an isotopic hydrograph separation to distinguish rainwater and pore water from meltwater. Using the isotopic data of snow and meltwater from Lee et al. (2010), two components were separated based on the assumption that rainwater and pore water are new water and natural meltwater is old water. After the second rain-on-snow experiment, the maximum contributions of rainwater and pore water reached up to 69% of the discharge and then decreased. During the study period, the measured total discharge was 4153 L and 40% (based on hydrogen isotope) of rainwater and pore water was calculated in the discharge, which is not consistent with what Lee et al. (2016) calculated using chemical separation (63%). This inconsistency can be explained by how an end-member was defined in both approaches. The contributions of artificial rainonsnow and pore water to melwater discharge range between the two methods. This study will suggest a mixing calculation from isotopic compositions of the Southern Ocean.

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Chemical separation of the discharge generated by artificial rain-on-snow experiments in a snowpack

Cited by 3 publications

References 14 publications

Stable Isotopes of Water and Nitrate for the Identification of Groundwater Flowpaths: A Review

Stable Isotopes of Water and Nitrate for the Identification of Groundwater Flowpaths: A Review

A review on hydrograph separation using isotopic tracers

Isotopic Hydrograph Separation Using Artificial Rain-on-snow Experiments and Its Implications by Each Tracer

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