Hydrodynamics of a high Alpine catchment characterized by four natural tracers
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Published:2023-04-03
Issue:7
Volume:27
Page:1403-1430
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ISSN:1607-7938
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Container-title:Hydrology and Earth System Sciences
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language:en
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Short-container-title:Hydrol. Earth Syst. Sci.
Author:
Michelon AnthonyORCID, Ceperley NatalieORCID, Beria HarshORCID, Larsen JoshuaORCID, Vennemann Torsten, Schaefli BettinaORCID
Abstract
Abstract. Hydrological processes in high-elevation catchments are strongly influenced by alternating snow accumulation and melt in addition to summer rainfall. Although diverse water sources and flow paths that generate streamflow in the world's water towers emerge from these two driving inputs, a detailed process understanding remains poor. We measured a combination of natural tracers of water at a high frequency, including stable isotope compositions, electrical conductivity (EC), and water and soil temperature to characterize hydrological processes in a snow-dominated Alpine catchment and to understand the diversity of streamflow sources and flow paths. Stable isotope composition of the sampled water revealed the prominence of snowmelt year-round (even during winter baseflow), and a strong flushing of the entire system with snowmelt at the start of the main melt period, sometimes referred to as the freshet, led to a reset, or return to baseline, of the isotopic values in most sampled water. Soil temperature measurements help identify snow-free periods and indicate sub-snowpack local flow, for example, in the case of rain-on-snow events. Water temperature measurements in springs can indicate flow path depth. EC measurements reflect the magnitude of subsurface exchange and allow for the separation of subsurface snowmelt contribution to streamflow from the contribution of stored groundwater. These insights into the details of streamflow generation in such a dynamic environment were only made possible due to intense, year-round water sampling. The sampled tracers are revealed to complement each other in important ways particularly because they were sampled during winter and spring, both snow-covered periods, the importance of which is a key implication of this work.
Funder
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
Publisher
Copernicus GmbH
Subject
General Earth and Planetary Sciences,General Engineering,General Environmental Science
Reference110 articles.
1. Affolter, S., Hauselmann, A. D., Fleitmann, D., Hauselmann, P., and Leuenberger, M.: Triple isotope (delta D, delta O-17, delta O-18) study on precipitation, drip water and speleothem fluid inclusions for a Western Central European cave (NW Switzerland), Quaternary Sci. Rev., 127, 73–89, https://doi.org/10.1016/j.quascirev.2015.08.030, 2015. 2. Antoniazza, G., Nicollier, T., Boss, S., Mettra, F., Badoux, A., Schaefli, B., Rickenmann, D., and Lane, S.: Hydrological drivers of bedload transport in an Alpine watershed, Water Resour. Res., 58, 2021WR030663, https://doi.org/10.1029/2021WR030663, 2022. 3. Arnoux, M., Brunner, P., Schaefli, B., Mott, R., Cochand, F., and Hunkeler, D.: Low-flow behavior of alpine catchments with varying quaternary cover under current and future climatic conditions, J. Hydrol., 592, 125591, https://doi.org/10.1016/j.jhydrol.2020.125591, 2020. 4. Badoux, H.: Aperçu géologique du Vallon de Nant, in: Géologie simplifié de la région de Morcles – Les Diablerets – Vallon de Nant, Jardin alpin du Pont de Nant 1891–1991, edited by: Argand, E., Badoux, H., and Lugeon, M.: revue“La Thomasia”, 37–43, http://clubjurassien.ch/archivePDF/1342426319.pdf (last access: 30 March 2023), 1991. 5. Barkan, E. and Luz, B.: High precision measurements of O-17/O-16 and O-18/O-16 ratios in H2O, Rapid Commun. Mass Sp., 19, 3737–3742, https://doi.org/10.1002/rcm.2250, 2005.
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