Tracing the isotopic signatures of cryospheric water and establishing the altitude effect in Central Himalayas: A tool for cryospheric water partitioning

Pant, Neeraj; Semwal, Poonam; Khobragade, S. D.; Prakash, Shive; Kumar, Sudhir; Dubey, Rajesh Kumar; Jacob, Noble; Joshi, Suneel Kumar; Rawat, Yadhvir Singh; Nainwal, H. C.; Shah, Sunil Singh; Mishra, Aditya N.; Ahluwalia, Rajeev Saran

doi:10.1016/j.jhydrol.2021.125983

Cited by 22 publications

(26 citation statements)

References 93 publications

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“…Moreover, the 14 C values for the collected water samples Ao= 85 ± 5% pmc as the study area was mainly on alluvium (Clark & Fritz, 1997;Geyh, 2000;Mook, 2000). The surface water and groundwater samples are close to the meteoric water lines (LMWL), indicating the meteoric origin of the groundwater (Pant et al, 2021b). This means that the source of the groundwater in the study area is mainly from the rain water.…”

Section: Surface Water and Groundwatermentioning

confidence: 64%

“…The 3 H value is found to be in the range of 0.95 -2.13 TU which suggests that these water samples are a mixture of between submodern water which prior to 1952 and recent recharge is less than 10 years (Clark & Fritz, 1997;Mook 2000). The tritium concentration of <1TU, suggesting that the water is older than 50 years (Pant et al, 2021b).…”

Section: Surface Water and Groundwatermentioning

confidence: 99%

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Assessment of groundwater recharge sources and its dynamics using environmental isotope and hydrochemical approaches in coastal aquifers of Peninsular Malaysia

MOSTAPA¹,

SAMUDING²,

DAUNG³

et al. 2022

ASMScJ

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The aims of this study are to investigate the interconnection and the dynamics between groundwater and surface water in the coastal area in the eastern part of Peninsular Malaysia using isotope technique integrated with the hydrochemical and hydrogeological approach. Using stable isotopic composition (d2H and d18O), it was shown that there is no relationship between the mid–deep and deep groundwater indicating that they came from different aquifers. Based on the two–component mass balance for oxygen, the source of groundwater salinity was determined. The results showed that 12% of the groundwater is recharged by the seawater while 88% is from both rainwater and river water. This reveals that one of the deep groundwater (UMPB) was affected by seawater intrusion. However, the deep groundwater in the southern part of the study area was not influenced by saline water because of the geological conditions. As a result of the seawater intrusion, UMPB is showing the characteristics of shallow groundwater due to mixing with modern saline water which was also supported by the natural radioactive isotope (3H and 14C) and hydrochemical results.

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Section: Surface Water and Groundwatermentioning

confidence: 64%

Section: Surface Water and Groundwatermentioning

confidence: 99%

Assessment of groundwater recharge sources and its dynamics using environmental isotope and hydrochemical approaches in coastal aquifers of Peninsular Malaysia

MOSTAPA¹,

SAMUDING²,

DAUNG³

et al. 2022

ASMScJ

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“…Spatial variation in the stable isotopic composition of hydrogen and oxygen in precipitation and river water is a direct cause of spatial variation in the recharge sources of runoff (James & Roulet, 2009; Pant et al, 2021). The spatial variation within the basin does not only exert an influence on the composition of runoff by a single factor, but also by the synthesis of different elevational environments, evapotranspiration processes and meteorological conditions on the composition of runoff (Elias et al, 2021; Gao et al, 2021; Gulev et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Earlier studies in the region have identified the proportion of different recharge sources in an integral basin, but there is a clear zonal differentiation in the mountain basin influenced by the pattern of vertical zonal differentiation (James & Roulet, 2009; Kumar et al, 2019). To clarify the impact of this variability on runoff recharge mechanisms, a more refined observation is required (Pant et al, 2021). In this study, we established an observation system in the Shiyang River Basin, an arid inland river basin in China.…”

Section: Introductionmentioning

confidence: 99%

Spatial variability of runoff recharge sources and influence mechanisms in an arid mountain flow‐producing zone

Sang

Zhu

Qiu

et al. 2022

Hydrological Processes

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In‐depth knowledge of the hydrological conditions of basins in arid regions can help to maintain the long‐term water security. The mechanisms of runoff generation and flow paths in different landscape areas are not fully known due to spatial variability. We have explored the mechanisms by which spatial variability affects the runoff recharge sources in the Xiying River Basin. The results showed that the spatial variability of the sources and generation mechanisms of runoff in the arid mountain flow‐producing zone is the result of the combined effect of different landscape, elevation and meteorological elements. In the upstream area, the short mean transit time (MTT) combined with the high contribution of recharge from the meltwater (29.32%) and the proportion of pre‐event water (between 60% and 90%) means that runoff production processes are strongly controlled by meltwater recharge and precipitation events. The MTT and the proportion of pre‐event water in the midstream area are ranked in the middle of the three landscape areas, but the highest contribution of precipitation (16.57%) indicates the importance of precipitation to runoff production processes. In the downstream area, the MTT is the longest and the proportion of pre‐event water is the smallest, and groundwater remains the basis for long‐term stability of runoff (groundwater contribution rate: 40.62%). By enhancing the spatial resolution for identifying runoff recharge sources can reduce the model uncertainty by 69%. Thus, taking full account of the spatial heterogeneity in arid regions is an important initiative to achieve scientific water resources management.

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“…The range of snowmelt water

\delta

18 O and

\delta

2 H values can be different from the range of precipitation isotope values (Beria et al., 2018; Gat, 1996; Hooper & Shoemaker, 1986; McNamara et al., 1997; Rodhe, 1981, 1998). Snowmelt water 18 O or 2 H isotopes are often used as one of the end‐members in isotope hydrograph separation methods for understanding streamflow generation processes and source water partitioning (Laudon et al., 2002; Pant et al., 2021; Penna & van Meerveld, 2019; Penna et al., 2014, 2016; Rodhe, 1981), in mixing models (Beria et al., 2020; Unnikrishna et al., 2002) and to help infer transit time distributions of catchment storage (Ceperley et al., 2020; Fang et al., 2019; Lyon et al., 2010). The snowpack water 18 O and 2 H isotopes can be used to provide proxy records of water sources for plants (Alstad et al., 1999; Jespersen et al., 2018; Welker et al., 2005; Young‐Robertson et al., 2017) and moisture transport mechanisms (Ala‐aho et al., 2021; Pu, Kong, et al., 2020; Sinclair & Marshall, 2008).…”

Section: Introductionmentioning

confidence: 99%

The Spatiotemporal Variability of Snowpack and Snowmelt Water ¹⁸O and ²H Isotopes in a Subarctic Catchment

Noor

Marttila

Kløve

et al. 2023

Water Resources Research

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This study provides a detailed characterization of spatiotemporal variations of stable water 18O and 2H isotopes in both snowpack and meltwater in a subarctic catchment. We performed extensive sampling and analysis of snowpack and meltwater isotopic compositions at 11 locations in 2019 and 2020 across three different landscape features: (a) forest hillslope, (b) mixed forest, and (c) open mires. The vertical isotope profiles in the snowpack's layered stratigraphy presented a consistent pattern in all locations before snowmelt, and isotope profiles homogenized during the peak melt period; represented by a 1–2‰ higher δ $\delta $18O value than prior to melting. Our data indicated that the liquid‐ice fractionation was the prime reason that caused the depletion of heavy isotopes in initial meltwater samples prior to the peak melt period. The liquid‐ice fractionation was influenced by snowmelt rate, with higher fractionation during slow melt. The kinetic liquid‐ice fractionation was evident only in close examination of meltwater lc‐excess values, not δ $\delta $18O values alone. Meltwater was isotopically heavier and more variable than the depth‐integrated snowpack; the weighted mean of meltwater isotope values was higher by 0.62–1.33‰ δ $\delta $18O than the weighted mean of snowpack isotope values in forest hillslope and mixed forest areas, and 1.51–6.37‰ δ $\delta $18O in open mires. Our results reveal close to 3.1‰ δ $\delta $18O disparity between the meltwater and depth‐integrated snowpack isotope values prior to the peak melt period, suggesting that proper characterization of meltwater δ $\delta $18O and δ $\delta $2H values is vital for tracer‐based ecohydrological studies and models.

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Tracing the isotopic signatures of cryospheric water and establishing the altitude effect in Central Himalayas: A tool for cryospheric water partitioning

Cited by 22 publications

References 93 publications

Assessment of groundwater recharge sources and its dynamics using environmental isotope and hydrochemical approaches in coastal aquifers of Peninsular Malaysia

Assessment of groundwater recharge sources and its dynamics using environmental isotope and hydrochemical approaches in coastal aquifers of Peninsular Malaysia

Spatial variability of runoff recharge sources and influence mechanisms in an arid mountain flow‐producing zone

The Spatiotemporal Variability of Snowpack and Snowmelt Water ¹⁸O and ²H Isotopes in a Subarctic Catchment

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Tracing the isotopic signatures of cryospheric water and establishing the altitude effect in Central Himalayas: A tool for cryospheric water partitioning

Cited by 22 publications

References 93 publications

Assessment of groundwater recharge sources and its dynamics using environmental isotope and hydrochemical approaches in coastal aquifers of Peninsular Malaysia

Assessment of groundwater recharge sources and its dynamics using environmental isotope and hydrochemical approaches in coastal aquifers of Peninsular Malaysia

Spatial variability of runoff recharge sources and influence mechanisms in an arid mountain flow‐producing zone

The Spatiotemporal Variability of Snowpack and Snowmelt Water 18O and 2H Isotopes in a Subarctic Catchment

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The Spatiotemporal Variability of Snowpack and Snowmelt Water ¹⁸O and ²H Isotopes in a Subarctic Catchment