Articles | Volume 28, issue 7
https://doi.org/10.5194/hess-28-1711-2024
https://doi.org/10.5194/hess-28-1711-2024
Research article
 | 
15 Apr 2024
Research article |  | 15 Apr 2024

Stream water sourcing from high-elevation snowpack inferred from stable isotopes of water: a novel application of d-excess values

Matthias Sprenger, Rosemary W. H. Carroll, David Marchetti, Carleton Bern, Harsh Beria, Wendy Brown, Alexander Newman, Curtis Beutler, and Kenneth H. Williams

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Cited articles

Bennett, K. E. and Talsma, C.: Concurrent Changes in Extreme Hydroclimate Events in the Colorado River Basin, Water, 13, 978, https://doi.org/10.3390/w13070978, 2021. 
Beria, H., Larsen, J. R., Ceperley, N. C., Michelon, A., Vennemann, T., and Schaefli, B.: Understanding snow hydrological processes through the lens of stable water isotopes, Wiley Interdiscip, Rev. Water, 5, e1311, https://doi.org/10.1002/wat2.1311, 2018. 
Beria, H., Larsen, J. R., Michelon, A., Ceperley, N. C., and Schaefli, B.: Data for the manuscript “HydroMix v1.0: a new Bayesian mixing framework for attributing uncertain hydrological sources” (Version 1.0), Zenodo [code], https://doi.org/10.5281/zenodo.3475429, 2019. 
Beria, H., Larsen, J. R., Michelon, A., Ceperley, N. C., and Schaefli, B.: HydroMix v1.0: a new Bayesian mixing framework for attributing uncertain hydrological sources, Geosci. Model Dev., 13, 2433–2450, https://doi.org/10.5194/gmd-13-2433-2020, 2020. 
Bureau of Reclamation: Colorado River Basin Water Supply and Demand Study Executive Summary, Reclam. Manag. Water West, https://www.usbr.gov/watersmart/bsp/docs/finalreport/ColoradoRiver/CRBS_Executive_Summary_FINAL.pdf (last access: 10 April 2024), 2012. 
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Short summary
Stable isotopes of water (described as d-excess) in mountain snowpack can be used to infer proportions of high-elevation snowmelt in stream water. In a Colorado River headwater catchment, nearly half of the water during peak streamflow is derived from melted snow at elevations greater than 3200 m. High-elevation snowpack contributions were higher for years with lower snowpack and warmer spring temperatures. Thus, we suggest that d-excess could serve to assess high-elevation snowpack changes.