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- W4200068763 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Climate change affects precipitation phase, which can propagate into changes in streamflow timing and magnitude. This study examines how the spatial and temporal distribution of rainfall and snowmelt affects discharge in rainâsnow transition zones. These zones experience large year-to-year variations in precipitation phase, cover a significant area of mountain catchments globally, and might extend to higher elevations under future climate change. We used observations from 11 weather stations and snow depths measured from one aerial lidar survey to force a spatially distributed snowpack model (iSnobal/Automated Water Supply Model) in a semiarid, 1.8âkm<span class=inline-formula><sup>2</sup></span> headwater catchment. We focused on surface water input (SWI; the summation of rainfall and snowmelt on the soil) for 4Â years with contrasting climatological conditions (wet, dry, rainy, and snowy) and compared simulated SWI to measured discharge. A strong spatial agreement between snow depth from the lidar survey and model (r<span class=inline-formula><sup>2</sup></span>â<span class=inline-formula>=</span>â0.88) was observed, with a median NashâSutcliffe efficiency (NSE) of 0.65 for simulated and measured snow depths at snow depth stations for all modeled years (0.75 for normalized snow depths). The spatial pattern of SWI was consistent between the 4Â years, with north-facing slopes producing 1.09â1.25 times more SWI than south-facing slopes, and snowdrifts producing up to 6 times more SWI than the catchment average. Annual discharge in the catchment was not significantly correlated with the fraction of precipitation falling as snow; instead, it was correlated with the magnitude of precipitation and spring snow and rain. Stream cessation depended on total and spring precipitation, as well as on the melt-out date of the snowdrifts. These results highlight the importance of the heterogeneity of SWI at the rainâsnow transition zone for streamflow generation and cessation, and emphasize the need for spatially distributed modeling or monitoring of both snowpack and rainfall dynamics." @default.
- W4200068763 created "2021-12-31" @default.
- W4200068763 creator A5022233953 @default.
- W4200068763 date "2021-11-29" @default.
- W4200068763 modified "2023-10-16" @default.
- W4200068763 title "Reply on RC2" @default.
- W4200068763 doi "https://doi.org/10.5194/hess-2021-362-ac2" @default.
- W4200068763 hasPublicationYear "2021" @default.
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