Scott A Wright (Former Employee)
Science and Products
Filter Total Items: 53
Flow structures and sandbar dynamics in a canyon river during a controlled flood, Colorado River, Arizona
In canyon rivers, debris fan constrictions create rapids and downstream pools characterized by secondary flow structures that are closely linked to channel morphology. In this paper we describe detailed measurements of the three‐dimensional flow structure and sandbar dynamics of two pools along the Colorado River in the Grand Canyon during a controlled flood release from Glen Canyon Dam. Results i
Authors
Scott Wright, M. Kaplinski
Mechanics and modeling of flow, sediment transport and morphologic change in riverine lateral separation zones
Lateral separation zones or eddies in rivers are critically important features for sediment storage and for a variety of roles they play in riparian and aquatic ecology. As part of a larger effort to predict the morphology of lateral separation zones in the Colorado River in Grand Canyon for a selection of sediment supply and discharge scenarios, we evaluated the performance of two modeling techni
Authors
Brandy L. Logan, Jonathan M. Nelson, Richard R. McDonald, Scott Wright
Discriminating silt-and-clay from suspended-sand in rivers using side-looking acoustic profilers
The ability to accurately monitor suspended-sediment flux in rivers is needed to support many types of studies, because the sediment that typically travels in suspension affects geomorphology and aquatic habitat in a variety of ways (e.g. bank and floodplain deposition, bar morphology, light penetration and primary productivity, tidal wetland deposition in the context of sea-level rise, sediment-a
Authors
Scott Wright, David J. Topping, Cory A. Williams
Grain-size evolution in suspended sediment and deposits from the 2004 and 2008 controlled-flood experiments in Marble and Grand Canyons, Arizona
Since the closure of Glen Canyon Dam in 1963, the hydrology, sediment supply, and distribution and size of modern alluvial deposits in the Colorado River through Grand Canyon have changed substantially (e.g., Howard and Dolan, 1981; Johnson and Carothers, 1987; Webb et al., 1999; Rubin et al., 2002; Topping et al., 2000, 2003; Wright et al., 2005; Hazel et al., 2006). The dam has reduced the fluvi
Authors
Amy E. Draut, David J. Topping, David M. Rubin, Scott Wright, John C. Schmidt
Evaluation of Water Year 2011 Glen Canyon Dam Flow Release Scenarios on Downstream Sand Storage along the Colorado River in Arizona
This report describes numerical modeling simulations of sand transport and sand budgets for reaches of the Colorado River below Glen Canyon Dam. Two hypothetical Water Year 2011 annual release volumes were each evaluated with six hypothetical operational scenarios. The six operational scenarios include the current operation, scenarios with modifications to the monthly distribution of releases, and
Authors
Scott Wright, Paul E. Grams
2008 High-Flow Experiment at Glen Canyon Dam Benefits Colorado River Resources in Grand Canyon National Park
On March 5, 2008, the Department of the Interior began a 60-hour high-flow experiment at Glen Canyon Dam, Arizona, to determine if water releases designed to mimic natural seasonal flooding could be used to improve downstream resources in Glen Canyon National Recreation Area and Grand Canyon National Park. U.S. Geological Survey (USGS) scientists and their cooperators undertook a wide range of phy
Authors
Theodore S. Melis, David J. Topping, Paul E. Grams, David M. Rubin, Scott Wright, Amy E. Draut, Joseph E. Hazel, Barbara E. Ralston, Theodore A. Kennedy, Emma Rosi-Marshall, Josh Korman, Kara D. Hilwig, Lara M. Schmit
Geomorphic response of sandbars to the March 2008 high-flow experiment on the Colorado River downstream from Glen Canyon Dam
The completion of Glen Canyon Dam in 1963 drastically altered the downstream flow regime and resulted in more than a 90 percent reduction of sand supply to the Colorado River in Grand Canyon National Park. Sandbars that were maintained by annual floods and a large sediment supply are now fewer in number and smaller in area and volume. Efforts to maintain sandbars in the current era of dam manageme
Authors
Paul E. Grams, Joseph E. Hazel, John C. Schmidt, Matt Kaplinski, Scott Wright, David J. Topping, Theodore S. Melis
An approach for modeling sediment budgets in supply-limited rivers
Reliable predictions of sediment transport and river morphology in response to variations in natural and human-induced drivers are necessary for river engineering and management. Because engineering and management applications may span a wide range of space and time scales, a broad spectrum of modeling approaches has been developed, ranging from suspended-sediment "rating curves" to complex three-
Authors
Scott Wright, David J. Topping, David M. Rubin, Theodore S. Melis
Water-Temperature Data for the Colorado River and Tributaries Between Glen Canyon Dam and Spencer Canyon, Northern Arizona, 1988-2005
The regulation of flow of the Colorado River by Glen Canyon Dam began in 1963. This resulted in significant changes to the downstream ecosystem of the Colorado River in Grand Canyon, contributing to the initiation of the Glen Canyon Environmental Studies program in 1982, followed by establishment of the Glen Canyon Dam Adaptive Management Program in 1996. This report describes a water-temperature
Authors
Nicholas Voichick, Scott Wright
Research Furthers Conservation of Grand Canyon Sandbars
Grand Canyon National Park lies approximately 25 km (15 mi) down-river from Glen Canyon Dam, which was built on the Colorado River just south of the Arizona-Utah border in Glen Canyon National Recreation Area. Before the dam began to regulate the Colorado River in 1963, the river carried such large quantities of red sediment, for which the Southwest is famous, that the Spanish named the river the
Authors
Theodore S. Melis, David J. Topping, David M. Rubin, Scott Wright
High-resolution measurements of suspended-sediment
No abstract available.
Authors
David J. Topping, Scott Wright, Theodore S. Melis, David M. Rubin
Sediment supply and demand for salt pond restoration
No abstract available.
Authors
David H. Schoellhamer, James L. Orlando, Scott Wright, Larry A. Freeman
Science and Products
Filter Total Items: 53
Flow structures and sandbar dynamics in a canyon river during a controlled flood, Colorado River, Arizona
In canyon rivers, debris fan constrictions create rapids and downstream pools characterized by secondary flow structures that are closely linked to channel morphology. In this paper we describe detailed measurements of the three‐dimensional flow structure and sandbar dynamics of two pools along the Colorado River in the Grand Canyon during a controlled flood release from Glen Canyon Dam. Results i
Authors
Scott Wright, M. Kaplinski
Mechanics and modeling of flow, sediment transport and morphologic change in riverine lateral separation zones
Lateral separation zones or eddies in rivers are critically important features for sediment storage and for a variety of roles they play in riparian and aquatic ecology. As part of a larger effort to predict the morphology of lateral separation zones in the Colorado River in Grand Canyon for a selection of sediment supply and discharge scenarios, we evaluated the performance of two modeling techni
Authors
Brandy L. Logan, Jonathan M. Nelson, Richard R. McDonald, Scott Wright
Discriminating silt-and-clay from suspended-sand in rivers using side-looking acoustic profilers
The ability to accurately monitor suspended-sediment flux in rivers is needed to support many types of studies, because the sediment that typically travels in suspension affects geomorphology and aquatic habitat in a variety of ways (e.g. bank and floodplain deposition, bar morphology, light penetration and primary productivity, tidal wetland deposition in the context of sea-level rise, sediment-a
Authors
Scott Wright, David J. Topping, Cory A. Williams
Grain-size evolution in suspended sediment and deposits from the 2004 and 2008 controlled-flood experiments in Marble and Grand Canyons, Arizona
Since the closure of Glen Canyon Dam in 1963, the hydrology, sediment supply, and distribution and size of modern alluvial deposits in the Colorado River through Grand Canyon have changed substantially (e.g., Howard and Dolan, 1981; Johnson and Carothers, 1987; Webb et al., 1999; Rubin et al., 2002; Topping et al., 2000, 2003; Wright et al., 2005; Hazel et al., 2006). The dam has reduced the fluvi
Authors
Amy E. Draut, David J. Topping, David M. Rubin, Scott Wright, John C. Schmidt
Evaluation of Water Year 2011 Glen Canyon Dam Flow Release Scenarios on Downstream Sand Storage along the Colorado River in Arizona
This report describes numerical modeling simulations of sand transport and sand budgets for reaches of the Colorado River below Glen Canyon Dam. Two hypothetical Water Year 2011 annual release volumes were each evaluated with six hypothetical operational scenarios. The six operational scenarios include the current operation, scenarios with modifications to the monthly distribution of releases, and
Authors
Scott Wright, Paul E. Grams
2008 High-Flow Experiment at Glen Canyon Dam Benefits Colorado River Resources in Grand Canyon National Park
On March 5, 2008, the Department of the Interior began a 60-hour high-flow experiment at Glen Canyon Dam, Arizona, to determine if water releases designed to mimic natural seasonal flooding could be used to improve downstream resources in Glen Canyon National Recreation Area and Grand Canyon National Park. U.S. Geological Survey (USGS) scientists and their cooperators undertook a wide range of phy
Authors
Theodore S. Melis, David J. Topping, Paul E. Grams, David M. Rubin, Scott Wright, Amy E. Draut, Joseph E. Hazel, Barbara E. Ralston, Theodore A. Kennedy, Emma Rosi-Marshall, Josh Korman, Kara D. Hilwig, Lara M. Schmit
Geomorphic response of sandbars to the March 2008 high-flow experiment on the Colorado River downstream from Glen Canyon Dam
The completion of Glen Canyon Dam in 1963 drastically altered the downstream flow regime and resulted in more than a 90 percent reduction of sand supply to the Colorado River in Grand Canyon National Park. Sandbars that were maintained by annual floods and a large sediment supply are now fewer in number and smaller in area and volume. Efforts to maintain sandbars in the current era of dam manageme
Authors
Paul E. Grams, Joseph E. Hazel, John C. Schmidt, Matt Kaplinski, Scott Wright, David J. Topping, Theodore S. Melis
An approach for modeling sediment budgets in supply-limited rivers
Reliable predictions of sediment transport and river morphology in response to variations in natural and human-induced drivers are necessary for river engineering and management. Because engineering and management applications may span a wide range of space and time scales, a broad spectrum of modeling approaches has been developed, ranging from suspended-sediment "rating curves" to complex three-
Authors
Scott Wright, David J. Topping, David M. Rubin, Theodore S. Melis
Water-Temperature Data for the Colorado River and Tributaries Between Glen Canyon Dam and Spencer Canyon, Northern Arizona, 1988-2005
The regulation of flow of the Colorado River by Glen Canyon Dam began in 1963. This resulted in significant changes to the downstream ecosystem of the Colorado River in Grand Canyon, contributing to the initiation of the Glen Canyon Environmental Studies program in 1982, followed by establishment of the Glen Canyon Dam Adaptive Management Program in 1996. This report describes a water-temperature
Authors
Nicholas Voichick, Scott Wright
Research Furthers Conservation of Grand Canyon Sandbars
Grand Canyon National Park lies approximately 25 km (15 mi) down-river from Glen Canyon Dam, which was built on the Colorado River just south of the Arizona-Utah border in Glen Canyon National Recreation Area. Before the dam began to regulate the Colorado River in 1963, the river carried such large quantities of red sediment, for which the Southwest is famous, that the Spanish named the river the
Authors
Theodore S. Melis, David J. Topping, David M. Rubin, Scott Wright
High-resolution measurements of suspended-sediment
No abstract available.
Authors
David J. Topping, Scott Wright, Theodore S. Melis, David M. Rubin
Sediment supply and demand for salt pond restoration
No abstract available.
Authors
David H. Schoellhamer, James L. Orlando, Scott Wright, Larry A. Freeman