A5082617071- Hydrology and Sediment Transport Processes
- Soil erosion and sediment transport
- Hydrology and Watershed Management Studies
- Soil and Water Nutrient Dynamics
- Ecology and biodiversity studies
- Fish Ecology and Management Studies
- Fire effects on ecosystems
- Forest Ecology and Biodiversity Studies
- Flood Risk Assessment and Management
- Coastal wetland ecosystem dynamics
- Archaeology and Natural History
- Black Holes and Theoretical Physics
- Remote Sensing and LiDAR Applications
- Groundwater flow and contamination studies
- Quantum Chromodynamics and Particle Interactions
- Energy, Environment, Agriculture Analysis
- Water Quality Monitoring Technologies
- Hydraulic flow and structures
- Innovations in Concrete and Construction Materials
- Tree-ring climate responses
- Soil and Land Suitability Analysis
- Tropical and Extratropical Cyclones Research
- Particle physics theoretical and experimental studies
- Urban and spatial planning
- Plant responses to water stress
Colorado State University
2021-2025
University of Tennessee at Knoxville
2024-2025
Colorado School of Mines
2021
Connecticut College
2016
Abstract Process‐based river restoration seeks to restore processes such as channel‐floodplain connectivity that create and maintain corridor functions. can fail produce the desired results if geomorphic context is not effectively incorporated into design. Geomorphic of a reach refers controls on contemporary form process. Controls at catchment‐ reach‐scale include geologic history, biophysical characteristics, legacies past human alterations, position within network, geometry, base level...
Abstract Large wood is inherently mobile in naturally functioning river corridors, yet management commonly introduces that anchored to limit hazards. Wood periodically mobilized important for: replacing stationary large performs diverse physical and ecological functions; contributing the disturbance regime of corridor; diversifying decay states; dispersing organisms propagules; providing refugia during floodplain inundation mobile‐bed channels; dissipating flow energy; supplying downstream...
Abstract Here, we explore how differences in morphologic heterogeneity due to logjams and secondary channels drive transient storage across discharge two stream reaches within the Front Range of Colorado, USA. During three tracer tests conducted from baseflow near‐peak snowmelt, collected instream fluid conductivity measurements electrical resistivity surveys characterize movement surface subsurface system. The reach with an intermittent channel exhibited greater storage, driving hyporheic...
Abstract Logjams in a stream create backwater conditions and locally force water to flow through the streambed, creating zones of transient storage within surface subsurface stream. We investigate relative importance logjam distribution density, permeability, discharge on simplified experimental channel. use physical flume experiments which we inject salt tracer, monitor fluid conductivity breakthrough curves water, determine breakthrough‐curve skewness characterize storage. then develop...
Abstract Wood accumulations influence geomorphic, hydraulic, and ecologic functions within a river corridor, but characterizing these presents challenges across range of field remote sensing methodologies. We evaluate the ability handheld lidar scanners, specifically lidar‐scanning capabilities fourth‐generation iPad Pro, to collect three‐dimensional wood accumulation data, which can be used inform measurements volume, porosity, complexity, roughness. discuss potential limitations this novel...
Abstract. The structure, function, and dynamics of Earth's terrestrial ecosystems are profoundly influenced by how often (frequency) long (duration) they inundated with water. A diverse array natural human-engineered systems experience temporally variable inundation whereby fluctuate between non-inundated states. Variable spans extreme events to predictable sub-daily cycles. Variably (VIEs) include hillslopes, non-perennial streams, wetlands, floodplains, temporary ponds, tidal systems,...
Accumulations of wood in rivers can alter three-dimensional connectivity and facilitate channel bifurcations. Bifurcations divide the flow water sediment into secondary channels are a key component anastomosing rivers. While past studies illustrate basic scenarios which bifurcations occur rivers, understanding mechanisms remains limited. We evaluate wood-induced across thirteen reaches nine different streams U.S. Rocky Mountains to address conditions that favor bifurcation types. hypothesize...
Abstract Log jams alter gradients in hydraulic head, increase the area available for hyporheic exchange by creating backwater areas, and lead to formation of multiple channel branches bars that drive additional exchange. Here, we numerically simulated stream‐groundwater interactions two constructed flume systems—one without one with a series three jams—to quantify effects interacting jam structures on at stream flow rates. In simulations jams, average rates ranged from 2.1 × 10 −4 2.9 m/s...
Abstract. The structure, function, and dynamics of Earth’s terrestrial ecosystems are profoundly influenced by the frequency duration that they inundated with water. A diverse array natural human engineered systems experience temporally variable inundation whereby fluctuate between non-inundated states. Variable spans from extreme flooding droughts to predictable sub-daily cycles. Variably (VIEs) include hillslopes, non-perennial streams, wetlands, floodplains, temporary ponds, tidal...
Abstract Natural rivers are inherently dynamic. Spatial and temporal variations in water, sediment, wood fluxes both cause respond to an increase geomorphic heterogeneity within the river corridor. We analyze 16 two‐km corridor segments of Swan River Montana, USA examine relationships between logjams (distribution density, count, persistence), channel dynamism (total sinuosity average migration), (patch density) hypothesize that (a) more dynamic correlate with a greater presence,...
Abstract We measured coarse particulate organic matter (CPOM) transport along a wood‐rich, pool‐riffle mountain stream in the Southern Rockies of Colorado, USA, to examine how spatial variations storage features and temporal discharge influence CPOM. Ecologists have found that majority annual CPOM export occurs during periods high discharge. More recently, geomorphologists begun as bedload. There has been, however, little direct sampling evaluate shorter (diurnal) longer (seasonal peak flow)...
Abstract Recognition of the important physical and ecological roles played by large wood in channels on floodplains has grown substantially during recent decades. Although continues to be routinely removed from many river corridors worldwide, practice reintroduction spread across United States, Kingdom western Europe, Australia, New Zealand. The state‐of‐science regarding working with rivers was discussed a workshop held Colorado, USA, September 2022 40 participants who are scientists...
Abstract Large wood causes and responds to deposition erosion within a river corridor. We focus on the anastomosing, gravel‐bed Swan River two meandering, tributaries in northwestern Montana, USA explore temporal dimensions of associated with channel avulsions island formation introduce concept levees. Channel avulsion represents isolation part existing floodplain an anastomosing planform, wood‐induced at point bifurcation. Islands form jam that migrates upstream time as sediment accumulates...
Logjams in a stream create backwater conditions and locally force water to flow through the streambed, creating zones of transient storage within surface subsurface stream. We investigate relative importance logjam distribution density, permeability, discharge on simplified experimental channel. use physical flume experiments which we inject salt tracer, monitor fluid conductivity breakthrough curves water, breakthrough-curve skew characterize storage. then develop numerical models...
<p>Log jams restructure the hyporheic zone, or region where stream water and groundwater mix, by storing sediment, widening in backwater areas, forcing new channel branches, altering hydraulic gradients that drive exchange. Here, we use flume numerical experiments to quantify effects of interacting jam structures branches on exchange at three flow rates. The presence multiple increased wetted streambed area (the available for exchange) 9-38% fluxes across bed roughly an order...