Judson W Harvey (Former Employee)
Science and Products
Filter Total Items: 16
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Hyporheic zone denitrification: controls on effective reaction depth and contribution to whole-stream mass balance Hyporheic zone denitrification: controls on effective reaction depth and contribution to whole-stream mass balance
Stream denitrification is thought to be enhanced by hyporheic transport but there is little direct evidence from the field. To demonstrate at a field site, we injected 15NO3−, Br (conservative tracer), and SF6 (gas exchange tracer) and compared measured whole-stream denitrification with in situ hyporheic denitrification in shallow and deeper flow paths of contrasting geomorphic units...
Authors
Judson W. Harvey, John Karl Böhlke, Mary A. Voytek, Durelle Scott, Craig R. Tobias
Relative significance of microtopography and vegetation as controls on surface water flow on a low-gradient floodplain Relative significance of microtopography and vegetation as controls on surface water flow on a low-gradient floodplain
Surface water flow controls water velocities, water depths, and residence times, and influences sediment and nutrient transport and other ecological processes in shallow aquatic systems. Flow through wetlands is substantially influenced by drag on vegetation stems but is also affected by microtopography. Our goal was to use microtopography data directly in a widely used wetland model...
Authors
Jungyill Choi, Judson W. Harvey
Resolving hyporheic and groundwater components of streambed water flux Resolving hyporheic and groundwater components of streambed water flux
Hyporheic and groundwater fluxes typically occur together in permeable sediments beneath flowing stream water. However, streambed water fluxes quantified using the thermal method are usually interpreted as representing either groundwater or hyporheic fluxes. Our purpose was to improve understanding of co-occurring groundwater and hyporheic fluxes using streambed temperature measurements...
Authors
Aditi S. Bhaskar, Judson W. Harvey, Eric J. Henry
Thresholds of flow-induced bed disturbances and their effects on stream metabolism in an agricultural river Thresholds of flow-induced bed disturbances and their effects on stream metabolism in an agricultural river
Storm-driven flow pulses in rivers destroy and restructure sediment habitats that affect stream metabolism. This study examined thresholds of bed disturbances that affected patch- and reach-scale sediment conditions and metabolism rates. A 4 year record of discharge and diel changes in dissolved oxygen concentrations (ΔDO) was analyzed for disturbances and recovery periods of the ΔDO...
Authors
Ben L. O’Connor, Judson W. Harvey, Lauren E. McPhillips
Hydrogeomorphology of the hyporheic zone: stream solute and fine particle interactions with a dynamic streambed Hydrogeomorphology of the hyporheic zone: stream solute and fine particle interactions with a dynamic streambed
Hyporheic flow in streams has typically been studied separately from geomorphic processes. We investigated interactions between bed mobility and dynamic hyporheic storage of solutes and fine particles in a sand-bed stream before, during, and after a flood. A conservatively transported solute tracer (bromide) and a fine particles tracer (5 μm latex particles), a surrogate for fine...
Authors
J. W. Harvey, J.D. Drummond, R.L. Martin, L.E. McPhillips, A.I. Packman, D.J. Jerolmack, S.H. Stonedahl, A.F. Aubeneau, A.H. Sawyer, L. G. Larsen, C.R. Tobias
Physical controls and predictability of stream hyporheic flow evaluated with a multiscale model Physical controls and predictability of stream hyporheic flow evaluated with a multiscale model
Improved predictions of hyporheic exchange based on easily measured physical variables are needed to improve assessment of solute transport and reaction processes in watersheds. Here we compare physically based model predictions for an Indiana stream with stream tracer results interpreted using the Transient Storage Model (TSM). We parameterized the physically based, Multiscale Model...
Authors
Susa H. Stonedahl, Judson W. Harvey, Joel Detty, Antoine Aubeneau, Aaron I. Packman
Science and Products
Filter Total Items: 16
No Result Found
Filter Total Items: 121
Hyporheic zone denitrification: controls on effective reaction depth and contribution to whole-stream mass balance Hyporheic zone denitrification: controls on effective reaction depth and contribution to whole-stream mass balance
Stream denitrification is thought to be enhanced by hyporheic transport but there is little direct evidence from the field. To demonstrate at a field site, we injected 15NO3−, Br (conservative tracer), and SF6 (gas exchange tracer) and compared measured whole-stream denitrification with in situ hyporheic denitrification in shallow and deeper flow paths of contrasting geomorphic units...
Authors
Judson W. Harvey, John Karl Böhlke, Mary A. Voytek, Durelle Scott, Craig R. Tobias
Relative significance of microtopography and vegetation as controls on surface water flow on a low-gradient floodplain Relative significance of microtopography and vegetation as controls on surface water flow on a low-gradient floodplain
Surface water flow controls water velocities, water depths, and residence times, and influences sediment and nutrient transport and other ecological processes in shallow aquatic systems. Flow through wetlands is substantially influenced by drag on vegetation stems but is also affected by microtopography. Our goal was to use microtopography data directly in a widely used wetland model...
Authors
Jungyill Choi, Judson W. Harvey
Resolving hyporheic and groundwater components of streambed water flux Resolving hyporheic and groundwater components of streambed water flux
Hyporheic and groundwater fluxes typically occur together in permeable sediments beneath flowing stream water. However, streambed water fluxes quantified using the thermal method are usually interpreted as representing either groundwater or hyporheic fluxes. Our purpose was to improve understanding of co-occurring groundwater and hyporheic fluxes using streambed temperature measurements...
Authors
Aditi S. Bhaskar, Judson W. Harvey, Eric J. Henry
Thresholds of flow-induced bed disturbances and their effects on stream metabolism in an agricultural river Thresholds of flow-induced bed disturbances and their effects on stream metabolism in an agricultural river
Storm-driven flow pulses in rivers destroy and restructure sediment habitats that affect stream metabolism. This study examined thresholds of bed disturbances that affected patch- and reach-scale sediment conditions and metabolism rates. A 4 year record of discharge and diel changes in dissolved oxygen concentrations (ΔDO) was analyzed for disturbances and recovery periods of the ΔDO...
Authors
Ben L. O’Connor, Judson W. Harvey, Lauren E. McPhillips
Hydrogeomorphology of the hyporheic zone: stream solute and fine particle interactions with a dynamic streambed Hydrogeomorphology of the hyporheic zone: stream solute and fine particle interactions with a dynamic streambed
Hyporheic flow in streams has typically been studied separately from geomorphic processes. We investigated interactions between bed mobility and dynamic hyporheic storage of solutes and fine particles in a sand-bed stream before, during, and after a flood. A conservatively transported solute tracer (bromide) and a fine particles tracer (5 μm latex particles), a surrogate for fine...
Authors
J. W. Harvey, J.D. Drummond, R.L. Martin, L.E. McPhillips, A.I. Packman, D.J. Jerolmack, S.H. Stonedahl, A.F. Aubeneau, A.H. Sawyer, L. G. Larsen, C.R. Tobias
Physical controls and predictability of stream hyporheic flow evaluated with a multiscale model Physical controls and predictability of stream hyporheic flow evaluated with a multiscale model
Improved predictions of hyporheic exchange based on easily measured physical variables are needed to improve assessment of solute transport and reaction processes in watersheds. Here we compare physically based model predictions for an Indiana stream with stream tracer results interpreted using the Transient Storage Model (TSM). We parameterized the physically based, Multiscale Model...
Authors
Susa H. Stonedahl, Judson W. Harvey, Joel Detty, Antoine Aubeneau, Aaron I. Packman