Scott A Wright (Former Employee)
Science and Products
Filter Total Items: 59
Turbidity current observations in a large reservoir following a major wildfire Turbidity current observations in a large reservoir following a major wildfire
Turbidity currents are generated when denser river water plunges and flows along the bottom of a lake, reservoir, or ocean. The plunging and downstream movement are driven by density differences due to temperature and/or suspended sediment, and currents have been observed to move slowly over long distances. This study presents observations of multiple turbidity currents in a large...
Authors
Scott Wright, Mathieu D. Marineau
Physical characteristics of the lower San Joaquin River, California, in relation to white sturgeon spawning habitat, 2011–14 Physical characteristics of the lower San Joaquin River, California, in relation to white sturgeon spawning habitat, 2011–14
The U.S. Fish and Wildlife Service confirmed that white sturgeon (Acipenser transmontanus) recently spawned in the lower San Joaquin River, California. Decreases in the San Francisco Bay estuary white sturgeon population have led to an increased effort to understand their migration behavior and habitat preferences. The preferred spawning habitat of other white sturgeon (for example...
Authors
Mathieu D. Marineau, Scott Wright, Daniel R. Whealdon-Haught, Paul J. Kinzel
Daily reservoir sedimentation model: Case study from the Fena Valley Reservoir, Guam Daily reservoir sedimentation model: Case study from the Fena Valley Reservoir, Guam
A model to compute reservoir sedimentation rates at daily timescales is presented. The model uses streamflow and sediment load data from nearby stream gauges to obtain an initial estimate of sediment yield for the reservoir’s watershed; it is then calibrated to the total deposition calculated from repeat bathymetric surveys. Long-term changes to reservoir trapping efficiency are also...
Authors
Mathieu D. Marineau, Scott Wright
Calculation of in situ acoustic sediment attenuation using off-the-shelf horizontal ADCPs in low concentration settings Calculation of in situ acoustic sediment attenuation using off-the-shelf horizontal ADCPs in low concentration settings
The use of “off-the-shelf” acoustic Doppler velocity profilers (ADCPs) to estimate suspended sediment concentration and grain-size in rivers requires robust methods to estimate sound attenuation by suspended sediment. Theoretical estimates of sediment attenuation require a priori knowledge of the concentration and grain-size distribution (GSD), making the method impractical to apply in...
Authors
Dan Haught, Jeremy G. Venditti, Scott Wright
Bed-material characteristics of the Sacramento–San Joaquin Delta, California, 2010–13 Bed-material characteristics of the Sacramento–San Joaquin Delta, California, 2010–13
The characteristics of bed material at selected sites within the Sacramento–San Joaquin Delta, California, during 2010–13 are described in a study conducted by the U.S. Geological Survey in cooperation with the Bureau of Reclamation. During 2010‒13, six complete sets of samples were collected. Samples were initially collected at 30 sites; however, starting in 2012, samples were collected...
Authors
Mathieu D. Marineau, Scott Wright
Long-term continuous acoustical suspended-sediment measurements in rivers – Theory, evaluation, and results from 14 stations on five rivers Long-term continuous acoustical suspended-sediment measurements in rivers – Theory, evaluation, and results from 14 stations on five rivers
We have developed a physically based method for using two acoustic frequencies to measure suspended-silt-and-clay concentration, suspended-sand concentration, and suspended-sand median grain size in river cross sections at 15-minute intervals over decadal timescales. The method is strongly grounded in the extensive scientific literature on the scattering of sound by suspensions of small...
Authors
David J. Topping, Scott Wright, Ronald E. Griffiths, David J. Dean
Science and Products
Filter Total Items: 59
Turbidity current observations in a large reservoir following a major wildfire Turbidity current observations in a large reservoir following a major wildfire
Turbidity currents are generated when denser river water plunges and flows along the bottom of a lake, reservoir, or ocean. The plunging and downstream movement are driven by density differences due to temperature and/or suspended sediment, and currents have been observed to move slowly over long distances. This study presents observations of multiple turbidity currents in a large...
Authors
Scott Wright, Mathieu D. Marineau
Physical characteristics of the lower San Joaquin River, California, in relation to white sturgeon spawning habitat, 2011–14 Physical characteristics of the lower San Joaquin River, California, in relation to white sturgeon spawning habitat, 2011–14
The U.S. Fish and Wildlife Service confirmed that white sturgeon (Acipenser transmontanus) recently spawned in the lower San Joaquin River, California. Decreases in the San Francisco Bay estuary white sturgeon population have led to an increased effort to understand their migration behavior and habitat preferences. The preferred spawning habitat of other white sturgeon (for example...
Authors
Mathieu D. Marineau, Scott Wright, Daniel R. Whealdon-Haught, Paul J. Kinzel
Daily reservoir sedimentation model: Case study from the Fena Valley Reservoir, Guam Daily reservoir sedimentation model: Case study from the Fena Valley Reservoir, Guam
A model to compute reservoir sedimentation rates at daily timescales is presented. The model uses streamflow and sediment load data from nearby stream gauges to obtain an initial estimate of sediment yield for the reservoir’s watershed; it is then calibrated to the total deposition calculated from repeat bathymetric surveys. Long-term changes to reservoir trapping efficiency are also...
Authors
Mathieu D. Marineau, Scott Wright
Calculation of in situ acoustic sediment attenuation using off-the-shelf horizontal ADCPs in low concentration settings Calculation of in situ acoustic sediment attenuation using off-the-shelf horizontal ADCPs in low concentration settings
The use of “off-the-shelf” acoustic Doppler velocity profilers (ADCPs) to estimate suspended sediment concentration and grain-size in rivers requires robust methods to estimate sound attenuation by suspended sediment. Theoretical estimates of sediment attenuation require a priori knowledge of the concentration and grain-size distribution (GSD), making the method impractical to apply in...
Authors
Dan Haught, Jeremy G. Venditti, Scott Wright
Bed-material characteristics of the Sacramento–San Joaquin Delta, California, 2010–13 Bed-material characteristics of the Sacramento–San Joaquin Delta, California, 2010–13
The characteristics of bed material at selected sites within the Sacramento–San Joaquin Delta, California, during 2010–13 are described in a study conducted by the U.S. Geological Survey in cooperation with the Bureau of Reclamation. During 2010‒13, six complete sets of samples were collected. Samples were initially collected at 30 sites; however, starting in 2012, samples were collected...
Authors
Mathieu D. Marineau, Scott Wright
Long-term continuous acoustical suspended-sediment measurements in rivers – Theory, evaluation, and results from 14 stations on five rivers Long-term continuous acoustical suspended-sediment measurements in rivers – Theory, evaluation, and results from 14 stations on five rivers
We have developed a physically based method for using two acoustic frequencies to measure suspended-silt-and-clay concentration, suspended-sand concentration, and suspended-sand median grain size in river cross sections at 15-minute intervals over decadal timescales. The method is strongly grounded in the extensive scientific literature on the scattering of sound by suspensions of small...
Authors
David J. Topping, Scott Wright, Ronald E. Griffiths, David J. Dean