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DigitalCommons@USU
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The threat from the invasion of common reed (Phragmites australis) in Chesapeake Bay, USA is enormous and could lead to the displacement of almost all native wetland species. The key aspects and features of a new paradigm for managing native P....
2010-01-01
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The incremental increase in contributing area along a main stem river, called here the incremental area function (IAF), has direct relevance to the spatial heterogeneity of environmental fluxes (water, sediment, nutrients, etc.) entering the...
2014-01-01
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Terraces and floodplains are important indicators of near-channel sediment dynamics, serving as potential sediment sources and sinks. Increasing availability of high resolution topography data over large areas calls for development of...
2014-01-01
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Rivers in watersheds dominated by agriculture throughout the US are impaired by excess sediment, a significant portion of which comes from non-field, near-channel sources. Both land-use and climate have been implicated in altering river flows and...
2014-01-01
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Excessive loading of fine sediment is a prominent cause of river impairment, not only due to direct effects on biota and habitat but because sediment is often laden with excess nutrients, metals, and toxic substances. Determining the sources and...
2014-01-01
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We show that measurements of conservative and nonconservative tracers (e.g., long- and short-lived radionuclides) can provide spatially integrated, yet temporally discrete, insights to constrain sediment sources and channel–floodplain exchange at...
2014-01-01
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Many high-latitude fluvial systems are adjusting to base-level changes since the last glaciation. Channels that experienced base-level fall may still be incising, often through glacial diamictons (tills). These tills can be quite competent,...
2013-01-01
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Sediment delivery from the Le Sueur River watershed is a major concern in the turbidity-impaired Minnesota River. As part of a broader effort to develop a sediment budget for the Le Sueur River, this study implemented a process-based watershed...
2013-01-01
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Human activities influence watershed sediment dynamics in profound ways, often resulting in excessive loading of suspended sediment to rivers. One of the primary factors limiting our ability to effectively manage sediment at the watershed scale...
2013-01-01
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Effectively managing and reducing high suspended sediment loads in rivers requires an understanding of the magnitude of major sediment sources as well as erosion and transport processes that deliver excess fine sediments to the channel network....
2013-01-01
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Developing accurate long-term, basin-scale sediment budgets using isotopic sediment fingerprints requires a sediment routing model that not only accounts for a range of sediment source terms (e.g. tributaries, surface erosion and erosion of bluffs...
2013-01-01
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This is the final report of a four-year project intended to develop a sediment budget for the Le Sueur River watershed in southern Minnesota. Primary funding for the work was provided by the Minnesota Pollution Control Agency (MPCA) with...
2011-01-01
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State University Department of Watershed Sciences runs an introductory course for all incoming graduate students (13 in Fall 2011) immediately prior to each Fall semester. The course is an intense, five day introduction to the fundamental concepts...
2011-01-01
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This work is organized into three chapters, which represent distinct projects that collectively define my doctoral dissertation. Each of the chapters is divided into two or more sections. The first section of each chapter is a manuscript that...
2007-01-01
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Stream dwelling organisms are subject to numerous environmental stresses. Solar ultraviolet radiation (UVR) has been indicated as an important stressor in lakes and oceans, but has previously received little attention in stream ecosystems. Here,...
2003-01-01
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Excessive sedimentation is among the most common causes of impairment of stream ecosystems throughout the world. Determining the relative proportion of fine sediment derived from terrestrial soil erosion processes versus channel erosion processes...
2014-01-01
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Accurate representations of river bathymetry are essential for understanding channel morphodynamics and sediment routing. Repeat surveys of channel topography using sophisticated technology can elucidate where depositional surfaces occur and...
2013-01-01
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The core principles of sediment budgeting are simple, involving a careful accounting of sediment sources and sinks over a specified spatial extent and time period. However, a long history of sediment budgeting has shown that such numbers are...
2013-01-01
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In equilibrium landscapes, the concentration of beryllium-10 (10Be) from fluvially transported material is expected to quantitatively reflect basin-wide denudation rates. No isotopic time-dependent path is considered because the concentrations...
2013-01-01
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High-resolution topography data (lidar) are being collected over increasingly larger geographic areas. These data contain an immense amount of information regarding the topography of bare-earth and vegetated surfaces. Repeat lidar data (collected...
2013-01-01
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Background/Question/Methods Management and restoration of aquatic ecosystems in sediment-impaired streams requires quantification of sediment sources. The focus here is on determining magnitude and sources of suspended sediment in a tributary of...
2013-01-01
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Fine sediment is routed through landscapes and channel networks in a highly unsteady and non-uniform manner, potentially experiencing deposition and re-suspension many times during transport from source to sink. Developing a better understanding...
2013-01-01
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Management and restoration of sediment-impaired streams requires quantification of sediment sources and pathways of transport. Addressing the role of humans in altering the magnitude and sources of sediment supplied to a catchment is notoriously...
2013-01-01
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Sharp topographic features often represent critical boundaries, or discontinuities, in hydrologic and geomorphic processes. Many such features are found in the proximity of actively evolving river channels (e.g., small knickpoints, steep channel...
2012-01-01
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Addressing the environmental impacts of agricultural development is made difficult by the scale and complexity of the natural system, the pervasive human alteration of that system, the contingent and nonlinear nature of system response, and the...
2011-01-01
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