Hydrochemistry and isotope geochemistry of Song Stream, a headwater tributary of the South Han River, South Korea

Ryu, Jong-Sik; Lee, Kwang-Sik; Chang, Ho‐Wan

doi:10.1007/bf02913929

Cited by 8 publications

(9 citation statements)

References 22 publications

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“…In the present study, we further investigate the hydrogeological system of alpine glacierized catchments using hydrochemical and stable isotopic parameters. Numerous studies have demonstrated the utility of using hydrochemistry and stable isotopes of water to characterize hydrologic dynamics in glacierized catchments (Clow et al ., ; Strauch et al ., ; Ryu et al ., ; Roy and Hayashi, ,b; Crossman et al ., ; Yang et al ., ; La Frenierre and Mark, ). These methods are powerful research tools in areas where conventional in situ hydrological and hydrogeological methods are difficult to deploy given a lack of instrumentation (Mark et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Contribution of groundwater to the outflow from ungauged glacierized catchments: a multi‐site study in the tropical Cordillera Blanca, Peru

Baraër

McKenzie

Mark

et al. 2014

Hydrological Processes

134

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The rapid retreat of the glaciers of the Cordillera Blanca is having a noticeable impact on the downstream hydrology. Although groundwater is a critical hydrologic component that sustains stream flows during the dry season, its characteristics and its contribution to downstream hydrology remain poorly understood. In this study, we analyse the hydrochemical and isotopic properties of potential hydrologic sources mixing in surface streams to characterize the proglacial hydrology in four glacially fed watersheds within the Cordillera Blanca, Peru. Water samples from streams, glacial melt and groundwater were collected in 2008 and 2009 and analysed for major ions and stable isotopes (δ18O and δ2H). Multivariate analysis of variance was used first to identify the hydrochemical and isotopic characteristics (tracers) of the water samples that depend primarily on the water source. Then several analyses, including hierarchical cluster analysis and mixing diagrams, were performed using these source‐dependent tracers, enabling a qualitative description of the key hydrological mechanisms that characterize the study watersheds. Finally, we applied a multi‐component spatial mixing model, the hydrochemical basin characterization method, to quantify the contributions of different water sources to the outflow from the four watersheds. The hydrochemical basin characterization method results show that groundwater is a major component of the discharge during the dry season and that the groundwater contribution to outflow is greater than 24% in all of the valleys. The results are used to develop a conceptual proglacial hydrological model of the Cordillera Blanca valleys. Talus and avalanche cones are identified as key components of the hydrology of the valleys. The talus deposits collect precipitation and runoff from higher elevations (approximately 400 m above the valley floor) and have a residence time that is long enough to actively release substantial volumes of water throughout the dry season. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Contribution of groundwater to the outflow from ungauged glacierized catchments: a multi‐site study in the tropical Cordillera Blanca, Peru

Baraër

McKenzie

Mark

et al. 2014

Hydrological Processes

134

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“…We carried out five synoptic sampling campaigns during January 1-8, 2012;July 7-9, 2012;June 12-15, 2015;June 25-30, 2016;and February 4-7, 2017. The June and July (January (Hooper and Shoemaker, 1986;Mark and Seltzer, 10 2003; Ryu et al, 2007;Mark and Mckenzie, 2007;Baraer et al, 2009), as well as to identify groundwater flow paths (Clow et al, 2003;Kendall et al, 2003;Baraer et al, 2009;Crossman et al, 2011;Baraer et al, 2015). Here, the proportion of glacier melt versus groundwater in discharge at the Gavilan Machay watershed is quantified using the Hydrochemical Basin Characterization Model (HBCM), a multi-component hydrochemical mixing model developed for use in data-sparse, glacierized tropical watersheds (Baraer et al, 2009).…”

Section: Field Samplingmentioning

confidence: 99%

Multi-scale temporal variability in meltwater contributions in a tropical glacierized watershed

Saberi¹,

McLaughlin²,

Ng³

et al. 2018

Preprint

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Abstract. Climate models predict amplified warming at high elevations in low latitudes, making tropical glacierized regions some of the most vulnerable hydrological systems in the world. Observations reveal decreasing streamflow due to retreating glaciers in the Andes, which hold 99% of all tropical glaciers. However, the timescales over which meltwater contributes to streamflow and the pathways it takes -surface and subsurface -remain uncertain, hindering our ability to predict how shrinking glaciers will impact water resources. Two major contributors to this uncertainty are the sparsity of hydrologic mea-5 surements in tropical glacierized watersheds and the complication of hydrograph separation where there is year-round glacier melt. We address these challenges using a multi-method approach that employs repeat hydrochemical mixing model analysis, hydroclimatic time series analysis, and integrated watershed modeling. Each of these approaches interrogates distinct timescale relationships among meltwater, groundwater, and stream discharge. Our results challenge the commonly held conceptual model that glaciers buffer discharge variability. Instead, in a sub-humid watershed on Volcán Chimborazo, Ecuador, meltwater drives 10 nearly all the variability in discharge (Pearson correlation coefficient of 0.89 in simulations), with glaciers contributing a broad range of 20-60% or wider of discharge, mostly (86%) through surface runoff on hourly timescales, but also through infiltration that increases annual groundwater contributions by nearly 20%. We further found that rainfall may enhance melt contributions to discharge at timescales that complement melt generation, possibly explaining why minimum discharge occurred at the study site during warm but dry El Niño conditions, which typically heighten melt in the Andes. Our findings caution against extrap-15 olations from isolated measurements: stream discharge and meltwater contributions in tropical glacierized systems can change substantially at hourly to interannual timescales, due to climatic variability and surface to subsurface flow processes.

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“…Sulfur isotopic composition of sulfate (δ 34 S SO4 ) shows values ranging from +2.6 to +4.8‰ in the streams of the study area. Sulfate isotopic values from the southern part of the Han River reported during spring and summer reveal δ 34 S SO4 values of +3.5 ± 1‰ (Ryu et al, 2007). The sulfur in streams and shallow groundwater may be derived from the oxidation of sulfide minerals as well as deposition of atmospheric sulfates through precipitation.…”

Section: Origin and Migration Of Sulfur Sources In East Asiamentioning

confidence: 99%

Sulfur, oxygen, and hydrogen isotope compositions of precipitation in Seoul, South Korea

Lim

Lee

et al. 2012

Geochem. J.

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Hydrochemistry and isotope geochemistry of Song Stream, a headwater tributary of the South Han River, South Korea

Cited by 8 publications

References 22 publications

Contribution of groundwater to the outflow from ungauged glacierized catchments: a multi‐site study in the tropical Cordillera Blanca, Peru

Contribution of groundwater to the outflow from ungauged glacierized catchments: a multi‐site study in the tropical Cordillera Blanca, Peru

Multi-scale temporal variability in meltwater contributions in a tropical glacierized watershed

Sulfur, oxygen, and hydrogen isotope compositions of precipitation in Seoul, South Korea

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