Use of stable water isotopes to identify hydrological processes of meteoric water in montane catchments

2015 ◽  
Vol 29 (23) ◽  
pp. 4957-4967 ◽  
Author(s):  
Tsung-Ren Peng ◽  
Kuan-Yu Chen ◽  
Wen-Jun Zhan ◽  
Wan-Chung Lu ◽  
Lun-Tao John Tong
Keyword(s):  
Meteoric Water ◽  
Hydrological Processes ◽  
Water Isotopes ◽  
Stable Water Isotopes

scholarly journals Understanding snow hydrological processes through the lens of stable water isotopes

2018 ◽  
Vol 5 (6) ◽  
Author(s):  
Harsh Beria ◽  
Joshua R. Larsen ◽  
Natalie Claire Ceperley ◽  
Anthony Michelon ◽  
Torsten Vennemann ◽  
...  
Keyword(s):  
Hydrological Processes ◽  
Water Isotopes ◽  
Stable Water Isotopes

scholarly journals Effects of climatic seasonality on the isotopic composition of evaporating soil waters

2018 ◽  
Author(s):  
Paolo Benettin ◽  
Till H. M. Volkmann ◽  
Jana von Freyberg ◽  
Jay Frentress ◽  
Daniele Penna ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Water Samples ◽  
Meteoric Water ◽  
Water Isotopes ◽  
Source Water ◽  
Stable Water Isotopes ◽  
Dual Isotope ◽  
Left Behind ◽  
Biased Estimates ◽  
By Products

Abstract. Stable water isotopes are widely used in ecohydrology as tracers of the transport, storage, and mixing of water on its journey through landscapes and ecosystems. Evaporation leaves a characteristic signature on the isotopic composition of the water that is left behind, such that in dual-isotope space, evaporated waters plot below the Local Meteoric Water Line (LMWL) that characterizes precipitation. Soil and xylem water samples can often plot below the LMWL as well, suggesting that they have also been influenced by evaporation. These soil and xylem water samples frequently plot along linear trends in dual-isotope space. These trendlines are sometimes termed evaporation lines and their intersection with the LMWL is sometimes interpreted as the isotopic composition of the precipitation source water. Here we use numerical experiments based on established isotope fractionation theory to show that these trendlines are often by-products of the seasonality in evaporative fractionation and in the isotopic composition of precipitation. Thus, they are often not true evaporation lines, and, if interpreted as such, can yield highly biased estimates of the isotopic composition of the source water.

scholarly journals Understanding snow hydrological processes through the lens of stable water isotopes

2017 ◽  
Author(s):  
Harsh Beria ◽  
Joshua Larsen ◽  
Natalie Ceperley ◽  
Anthony Michelon ◽  
Torsten Vennemann ◽  
...  
Keyword(s):  
Hydrological Processes ◽  
Water Isotopes ◽  
Stable Water Isotopes

Wintertime decoupling of urban valley and rural ridge hydrological processes revealed through stable water isotopes

2019 ◽  
Vol 213 ◽  
pp. 337-348 ◽  
Author(s):  
Richard P. Fiorella ◽  
Ryan Bares ◽  
John C. Lin ◽  
Gabriel J. Bowen
Keyword(s):  
Hydrological Processes ◽  
Water Isotopes ◽  
Stable Water Isotopes

scholarly journals Characterizing hydrological processes within kettle holes using stable water isotopes in the Uckermark of northern Brandenburg, Germany

2020 ◽  
Vol 34 (8) ◽  
pp. 1868-1887
Author(s):  
Stuart Andrew Vyse ◽  
Majid Taie Semiromi ◽  
Gunnar Lischeid ◽  
Christoph Merz
Keyword(s):  
Hydrological Processes ◽  
Water Isotopes ◽  
Stable Water Isotopes

Improving hydrologic model realism by using stable water isotopes

2020 ◽  
Author(s):  
Harsh Beria ◽  
Lionel Benoit ◽  
Natalie Ceperley ◽  
Anthony Michelon ◽  
Joshua R. Larsen ◽  
...  
Keyword(s):  
Hydrological Modeling ◽  
Hydrologic Model ◽  
Swiss Alps ◽  
Hydrological Processes ◽  
Model Complexity ◽  
Water Isotopes ◽  
Environmental Tracers ◽  
State Variables ◽  
Rainfall Runoff ◽  
Stable Water Isotopes

<p>The last century of hydrological research has led to significant improvements in representing different hydrological processes in rainfall-runoff models. With widely available streamflow data, such models are typically calibrated against this reference time series, which can limit their predictive power. One option to improve the realism of rainfall-runoff models is by incorporating environmental tracers such as stable isotopes of water, water temperature and electrical conductivity within the modeling setup. Conventionally, stable water isotopes have been used to learn more about the dominant hydrological processes that occur within a given catchment, which generally helps improve the hydrologic model structure, but often at the cost of increased model complexity to simulate the tracer concentration along with streamflow.</p><p>In this study, we develop a framework to incorporate stable water isotopes in continuous hydrological modeling, without significantly increasing model complexity. In the first step, stable water isotopes are used along with streamflow recession analysis to initialize the model state variables. After that, a Bayesian mixing model is used to infer the proportion of slow vs fast subsurface flow, and the results are used as additional constraints during the model calibration. This framework is extensively tested in a snow-dominated experimental catchment called Vallon de Nant, located in the Southwestern Swiss Alps (1189-3051 m. a.s.l.). During the presentation, we will discuss the advantages and limitations of such a modeling approach and how it can be extended to other experimental catchments.</p>

scholarly journals Effects of climatic seasonality on the isotopic composition of evaporating soil waters

2018 ◽  
Vol 22 (5) ◽  
pp. 2881-2890 ◽  
Author(s):  
Paolo Benettin ◽  
Till H. M. Volkmann ◽  
Jana von Freyberg ◽  
Jay Frentress ◽  
Daniele Penna ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Water Samples ◽  
Meteoric Water ◽  
Water Isotopes ◽  
Source Water ◽  
Stable Water Isotopes ◽  
Dual Isotope ◽  
Left Behind ◽  
Biased Estimates ◽  
By Products

Abstract. Stable water isotopes are widely used in ecohydrology to trace the transport, storage, and mixing of water on its journey through landscapes and ecosystems. Evaporation leaves a characteristic signature on the isotopic composition of the water that is left behind, such that in dual-isotope space, evaporated waters plot below the local meteoric water line (LMWL) that characterizes precipitation. Soil and xylem water samples can often plot below the LMWL as well, suggesting that they have also been influenced by evaporation. These soil and xylem water samples frequently plot along linear trends in dual-isotope space. These trend lines are often termed “evaporation lines” and their intersection with the LMWL is often interpreted as the isotopic composition of the precipitation source water. Here we use numerical experiments based on established isotope fractionation theory to show that these trend lines are often by-products of the seasonality in evaporative fractionation and in the isotopic composition of precipitation. Thus, they are often not true evaporation lines, and, if interpreted as such, can yield highly biased estimates of the isotopic composition of the source water.

scholarly journals A Lagrangian perspective on stable water isotopes during the West African Monsoon

2021 ◽  
Author(s):  
Christopher Johannes Diekmann ◽  
Matthias Schneider ◽  
Peter Knippertz ◽  
Andries Jan de Vries ◽  
Stephan Pfahl ◽  
...  
Keyword(s):  
West African Monsoon ◽  
West African ◽  
Water Isotopes ◽  
Stable Water Isotopes ◽  
The West ◽  
African Monsoon

scholarly journals Use of stable water isotopes to identify stages of the pingo ice core formation

2018 ◽  
Vol 58 (4) ◽  
pp. 507-523 ◽  
Author(s):  
Ju. N. Chizhova ◽  
Yu. K. Vasil’chuk
Keyword(s):  
Closed System ◽  
Ice Core ◽  
Ice Cores ◽  
Water Isotopes ◽  
Ice Formation ◽  
Stable Water Isotopes ◽  
Additional Tool ◽  
Hydrological Conditions ◽  
Water Saturated ◽  
Average Annual Precipitation

Te isotopic characteristics of the pingo ice cores are considered. Te distribution of δ18O and δ2H values, dexc, δ18O–δ2H and δ2H–d exc relationships, and the simulation of the distribution of δ18O and δ2H values during the ice formation in a closed system, allowed drawing conclusion about the hydrological conditions and stages of the ice core growth. All pingos (Pestsovoye, Weather, Pingo-20) were formed in draining lake basins in the course of freezing of closed taliks. It is established that the water, which served as a source for the formation of the ice core, was subjected to evaporation still before the ice formation. According to our estimates, the water from which the ice of the Pestsovoye pingo was formed was heavier in values of δ18O and δ2H by 3.9 and 29.7‰, respectively, than the current average annual precipitation in the region. Similarly, for the ice of the core of the Pingo Weather it is 2.9 and 14.5‰, and 5.1 and 27.7‰ for the Pingo-20, respectively. In the ice cores of all considered pingos there is an ice formed in a closed system: in Pingo-20 it is a pure injection ice, while in the Pestsovoye and the Weser ones – the injected-segregated ice. Te frost mounds Pestsovoe and Weser grew under changing hydrological conditions: one part of the ice was formed when there was a free flow of water to the freezing front (open system); the other one – when the water-saturated lenses of the closed talik were frozen (closed system). Te isotopic composition of ice being formed under conditions of a closed system reflects isotopic depletion during freezing and ice formation according to the Rayleigh model. It is expressed in a successive decrease in the values of δ18O and δ2H from the frst portions of ice to the last ones as the freezing continued. Te contrast values of δ18O and δ2H in different parts of the ice being formed in the closed system may be used as an additional tool to identify direction of freezing. In a closed system, the last portions of ice have the greater contrast of the isotope values as compared to the frst portions.

Sign in / Sign up

Export Citation Format

Share Document