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Physical Sciences and Mathematics Commons™
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- Great Salt Lake (2)
- Mercury (2)
- Alpine Lakes (1)
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- Bioaccumulation (1)
- Biogeochemical (1)
- DOM (1)
- Design procedure (1)
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- Erosion process (1)
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- Food webs (1)
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- Southwestern US (1)
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Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
Biogeochemical Response Of Alpine Lakes To A Recent Increase In Dust Deposition In The Southwestern, Us, Ashley P. Ballantyne, Janice Brahney, C. L. Lawrence, J. Saros, Jason C. Neff
Biogeochemical Response Of Alpine Lakes To A Recent Increase In Dust Deposition In The Southwestern, Us, Ashley P. Ballantyne, Janice Brahney, C. L. Lawrence, J. Saros, Jason C. Neff
Watershed Sciences Faculty Publications
The deposition of dust has recently increased significantly over some regions of the western US. Here we explore how changes in dust deposition have affected the biogeochemistry of two alpine watersheds in Colorado, US. We first reconstruct recent changes in the mass accumulation rate of sediments and then we use isotopic measurements in conjunction with a Bayesian mixing model to infer that approximately 95% of the inorganic fraction of lake sediments is derived from dust. Elemental analyses of modern dust indicate that dust is enriched in Ca, Cr, Cu, Mg, Ni, and in one watershed, Fe and P relative to …
Mercury In The Pelagic And Benthic Food Webs Of The Great Salt Lake, Wayne A. Wurtsbaugh, Erin Fleming, Caleb Izdepski, Jodi Gardberg
Mercury In The Pelagic And Benthic Food Webs Of The Great Salt Lake, Wayne A. Wurtsbaugh, Erin Fleming, Caleb Izdepski, Jodi Gardberg
Watershed Sciences Faculty Publications
No abstract provided.
Large Shift In Source Of Fine Sediment In The Upper Mississippi River, Patrick Belmont, Karen B. Gran, Shawn P. Schottler, Peter Wilcock, Stephanie S. Day, Carrie Jennings, J. Wesley Lauer, Enrica Viparelli, Jane K. Willenbring, Daniel R. Engstrom, Gary Parker
Large Shift In Source Of Fine Sediment In The Upper Mississippi River, Patrick Belmont, Karen B. Gran, Shawn P. Schottler, Peter Wilcock, Stephanie S. Day, Carrie Jennings, J. Wesley Lauer, Enrica Viparelli, Jane K. Willenbring, Daniel R. Engstrom, Gary Parker
Watershed Sciences Faculty Publications
Although sediment is a natural constituent of rivers, excess loading to rivers and streams is a leading cause of impairment and biodiversity loss. Remedial actions require identification of the sources and mechanisms of sediment supply. This task is complicated by the scale and complexity of large watersheds as well as changes in climate and land use that alter the drivers of sediment supply. Previous studies in Lake Pepin, a natural lake on the Mississippi River, indicate that sediment supply to the lake has increased 10-fold over the past 150 years.Herein we combine geochemical fingerprinting and a suite of geomorphic change …
Mercury And Selenium Bioaccumulation In The Stromatolite Community Of The Great Salt Lake, Utah, Usa, Wayne A. Wurtsbaugh
Mercury And Selenium Bioaccumulation In The Stromatolite Community Of The Great Salt Lake, Utah, Usa, Wayne A. Wurtsbaugh
Watershed Sciences Faculty Publications
No abstract provided.
Closing The Gap Between Watershed Modeling, Sediment Budgeting, And Stream Restoration, Sean M.C. Smith, Patrick Belmont, Peter Wilcock
Closing The Gap Between Watershed Modeling, Sediment Budgeting, And Stream Restoration, Sean M.C. Smith, Patrick Belmont, Peter Wilcock
Watershed Sciences Faculty Publications
The connection between stream restoration and sediment budgeting runs both ways: stream restoration is proposed as a means to reduce sediment yields, but an accurate understanding of sediment supply is necessary to design an effective project. Recent advances in monitoring technology, geochemical techniques, high-resolution topography data, and numerical modeling provide new opportunities to estimate sediment erosion, transport, and deposition rates; upscale them in a geomorphically relevant fashion; and synthesize sediment dynamics at watershed scales. For practical application at large scale, watershed models used to predict yield often do not resolve lower-order channels, leaving an essential “blind spot” regarding sediment processes. …
Revisiting Scaling Laws In River Basins: New Considerations Across Hillslope And Fluvial Regimes, Chandana Gangodagamage, Patrick Belmont, Efi Foufoula-Georgiou
Revisiting Scaling Laws In River Basins: New Considerations Across Hillslope And Fluvial Regimes, Chandana Gangodagamage, Patrick Belmont, Efi Foufoula-Georgiou
Watershed Sciences Faculty Publications
Increasing availability of high‐resolution (1 m) topography data and enhanced computational processing power present new opportunities to study landscape organization at a detail not possible before. Here we propose the use of “directed distance from the divide” as the scale parameter (instead of Horton’s stream order or upstream contributing area) for performing detailed probabilistic analysis of landscapes over a broad range of scales. This scale parameter offers several advantages for applications in hydrology, geomorphology, and ecology in that it can be directly related to length‐scale dependent processes, it can be applied seamlessly across the hillslope and fluvial regimes, and it …
Lakes As Buffers Of Stream Dissolved Organic Matter (Dom) Variability: Temporal Patterns Of Dom Characteristics In Mountain Stream-Lake Systems, K. J. Goodman, Michelle A. Baker, Wayne A. Wurtsbaugh
Lakes As Buffers Of Stream Dissolved Organic Matter (Dom) Variability: Temporal Patterns Of Dom Characteristics In Mountain Stream-Lake Systems, K. J. Goodman, Michelle A. Baker, Wayne A. Wurtsbaugh
Watershed Sciences Faculty Publications
Lakes within fluvial networks may affect dissolved organic matter (DOM) dynamics in streams by dampening spring DOM snowmelt flushing responses and/or by increasing summer DOM production. We assessed the temporal variability of dissolved organic carbon (DOC) concentration and DOM characteristics (specific ultraviolet absorbance (SUVA254); DOC:dissolved organic nitrogen (DOC:DON)), as well as DOC export in seven paired lake inflows and outflows in the Sawtooth Mountain lake district, Idaho. We hypothesized that lakes would decrease stream DOM temporal variability and increase DOM export as a result of autotrophic production. We correlated DOM variability with landscape factors to evaluate potential drivers of DOM …