Hydrology and Earth System Sciences
Hydrology and Earth System Sciences
HESS
Articles | Volume 30, issue 17
Articles | Volume 30, issue 17
https://doi.org/10.5194/hess-30-5735-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/hess-30-5735-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 30, issue 17
Research article
 | 
10 Sep 2026
Research article |  | 10 Sep 2026

Historical evolution of snowpack capacity to buffer rain-on-snow runoff in a large Columbia River headwaters basin

Joel Brown and Joel Harper

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Short summary
We present daily analysis of a 72-year snowpack evolution model driven by climate reanalysis data over a large Columbia River headwaters basin. Trends in cold content and total capillary retention reveal decreasing capacity to buffer against rain-on-snow flood events with the largest changes occurring during the last 5 weeks of the accumulation period. We demonstrate that seasonality of changes in factors related to snowpack buffering capacity is important when assessing rain-on-snow flood risk.
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