Water, Energy, and Biogeochemical Model (WEBMOD), user’s manual, version 1

Webb, R. M.; Parkhurst, David L.

doi:10.3133/tm6b35

Cited by 1 publication

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is likely due to absent winter soil‐water end‐member chemistry and the uncertainty in this end‐member's chemical designation with regards to soil weathering products and reactions during this time. Winter soil‐water chemistry likely consists of greater K + concentrations from the weathering of biotite, heavier isotopic concentrations, and potentially greater Cl − concentrations (Webb & Parkhurst, ).…”

Section: Resultsmentioning

confidence: 99%

“…Talus slopes, which are abundant in Loch Vale and throughout the Colorado Front Range, help sustain base flow, contribute substantially to total annual solute export (Clow & Mast, ; Clow & Sueker, ), and have the largest groundwater storage capacity in this watershed, although only a portion of that capacity is ever full (Clow, Schrott, et al, ). Previous hydrograph separation analyses indicate that subsurface water, including soil water and talus‐slope groundwater, contributes nearly 70% to 100% of the Andrews Creek streamflow during the winter and early spring but only 20% to 32% of the total annual streamflow and as little as 15% during peak snowmelt (Clow & Mast, ; Clow, Schrott, et al, ; Webb & Parkhurst, ). In the summer, snowmelt that is routed to the stream via surface run‐off and shallow, subsurface flow paths is the dominant source of water to Andrews Creek (Mast, Kendall, Campbell, Clow, & Back, ).…”

Section: Methodsmentioning

confidence: 99%

“…Winter soil-water chemistry likely consists of greater K + concentrations from the weathering of biotite, heavier isotopic concentrations, and potentially greater Cl − concentrations (Webb & Parkhurst, 2017).…”

Section: Mixing Analysis Fit With Chosen End Membersmentioning

confidence: 99%

See 2 more Smart Citations

Influence of climate on alpine stream chemistry and water sources

Foks

Stets

Singha

et al. 2018

Hydrological Processes

View full text Add to dashboard Cite

The resilience of alpine/subalpine watersheds may be viewed as the resistance of streamflow or stream chemistry to change under varying climatic conditions, which is governed by the relative size (volume) and transit time of surface and subsurface water sources. Here, we use end‐member mixing analysis in Andrews Creek, an alpine stream in Rocky Mountain National Park, Colorado, from water year 1994 to 2015, to explore how the partitioning of water sources and associated hydrologic resilience change in response to climate. Our results indicate that four water sources are significant contributors to Andrews Creek, including snow, rain, soil water, and talus groundwater. Seasonal patterns in source‐water contributions reflected the seasonal hydrologic cycle, which is driven by the accumulation and melting of seasonal snowpack. Flushing of soil water had a large effect on stream chemistry during spring snowmelt, despite making only a small contribution to streamflow volume. Snow had a large influence on stream chemistry as well, contributing large amounts of water with low concentrations of weathering products. Interannual patterns in end‐member contributions reflected responses to drought and wet periods. Moderate and significant correlations exist between annual end‐member contributions and regional‐scale climate indices (the Palmer Drought Severity Index, the Palmer Hydrologic Drought Index, and the Modified Palmer Drought Severity Index). From water year 1994 to 2015, the percent contribution from the talus‐groundwater end member to Andrews Creek increased an average of 0.5% per year (p < 0.0001), whereas the percent contributions from snow plus rain decreased by a similar amount (p = 0.001). Our results show how water and solute sources in alpine environments shift in response to climate variability and highlight the role of talus groundwater and soil water in providing hydrologic resilience to the system.

show abstract

Section: Resultsmentioning

confidence: 99%