Jon Burau
Jon Burau - California Water Science Center
Science and Products
Filter Total Items: 65
2011 Georgiana Slough non-physical barrier performance evaluation project report
The Sacramento River and its tributaries support populations of anadromous fish species including winter-run, spring-run, fall-run, and late fall–run Chinook salmon (Oncorhynchus tshawytscha); and steelhead (O. mykiss). Several of these species are listed as threatened or endangered under the California Endangered Species Act (CESA), federal Endangered Species Act (ESA), or both. These species spa
Authors
Ryan R. Reeves, Jacob McQuirk, Khalid Ameri, Russell W. Perry, Jason G. Romine, Theresa L. Liedtke, Jon R. Burau, Aaron R. Blake, Chris Fitzer, Natalie Smith, Steve Pagliughi, Sam Johnston, Kevin Kumagai, Kenneth Cash
The tidally averaged momentum balance in a partially and periodically stratified estuary
Observations of turbulent stresses and mean velocities over an entire spring–neap cycle are used to evaluate the dynamics of tidally averaged flows in a partially stratified estuarine channel. In a depth-averaged sense, the net flow in this channel is up estuary due to interaction of tidal forcing with the geometry of the larger basin. The depth-variable tidally averaged flow has the form of an es
Authors
M.T. Stacey, Matthew L. Brennan, Jon R. Burau, Stephen G. Monismith
Turbulent stresses and secondary currents in a tidal-forced channel with significant curvature and asymmetric bed forms
Acoustic Doppler current profilers are deployed to measure both the mean flow and turbulent properties in a channel with significant curvature. Direct measurements of the Reynolds stress show a significant asymmetry over the tidal cycle where stresses are enhanced during the flood tide and less prominent over the ebb tide. This asymmetry is corroborated by logarithmic fits using 10min10min average
Authors
D.A. Fong, Stephen G. Monismith, M.T. Stacey, J.R. Burau
Dual-RiverSonde measurements of two-dimensional river flow patterns
Two-dimensional river flow patterns have been measured using a pair of RiverSondes in two experiments in the Sacramento-San Joaquin River Delta system of central California during April and October 2007. An experiment was conducted at Walnut Grove, California in order to explore the use of dual RiverSondes to measure flow patterns at a location which is important in the study of juvenile fish migr
Authors
C.C. Teague, D.E. Barrick, P.M. Lilleboe, Ralph T. Cheng, Paul Stumpner, Jon R. Burau
Effects of flow diversions on water and habitat quality: Examples from California's highly manipulated Sacramento–San Joaquin Delta
We use selected monitoring data to illustrate how localized water diversions from seasonal barriers, gate operations, and export pumps alter water quality across the Sacramento-San Joaquin Delta (California). Dynamics of water-quality variability are complex because the Delta is a mixing zone of water from the Sacramento and San Joaquin Rivers, agricultural return water, and the San Francisco Estu
Authors
Nancy E. Monsen, James E. Cloern, Jon R. Burau
Ecological values of shallow-water habitats: Implications for the restoration of disturbed ecosystems
A presumed value of shallow-habitat enhanced pelagic productivity derives from the principle that in nutrient-rich aquatic systems phytoplankton growth rate is controlled by light availability, which varies inversely with habitat depth. We measured a set of biological indicators across the gradient of habitat depth within the Sacramento–San Joaquin River Delta (California) to test the hypothesis t
Authors
C.B. Lopez, J. E. Cloern, T.S. Schraga, A.J. Little, L.V. Lucas, J.K. Thompson, J.R. Burau
Intradaily variability of water quality in a shallow tidal lagoon: Mechanisms and implications
Although surface water quality and its underlying processes vary over time scales ranging from seconds to decades, they have historically been studied at the lower (weekly to interannual) frequencies. The aim of this study was to investigate intradaily variability of three water quality parameters in a small freshwater tidal lagoon (Mildred Island, California). High frequency time series of specif
Authors
L.V. Lucas, D.M. Sereno, J.R. Burau, T.S. Schraga, C.B. Lopez, M.T. Stacey, K.V. Parchevsky, V.P. Parchevsky
Flow convergence caused by a salinity minimum in a tidal channel
Residence times of dissolved substances and sedimentation rates in tidal channels are affected by residual (tidally averaged) circulation patterns. One influence on these circulation patterns is the longitudinal density gradient. In most estuaries the longitudinal density gradient typically maintains a constant direction. However, a junction of tidal channels can create a local reversal (change in
Authors
John C. Warner, David H. Schoellhamer, Jon R. Burau, S. Geoffrey Schladow
Averaged indicators of secondary flow in repeated acoustic Doppler current profiler crossings of bends
Cross‐stream velocity was measured in a large river bend at high spatial resolution over three separate survey episodes. A suite of methods for resolving cross‐stream velocity distributions was tested on data collected using acoustic Doppler current profilers (ADCP) in the sand‐bedded Sacramento River, California. The bend was surveyed with repeated ADCP crossings at eight cross sections during a
Authors
R.L. Dinehart, J.R. Burau
Repeated surveys by acoustic Doppler current profiler for flow and sediment dynamics in a tidal river
A strategy of repeated surveys by acoustic Doppler current profiler (ADCP) was applied in a tidal river to map velocity vectors and suspended-sediment indicators. The Sacramento River at the junction with the Delta Cross Channel at Walnut Grove, California, was surveyed over several tidal cycles in the Fall of 2000 and 2001 with a vessel-mounted ADCP. Velocity profiles were recorded along flow-def
Authors
R.L. Dinehart, J.R. Burau
Floodtide pulses after low tides in shallow subembayments adjacent to deep channels
In shallow waters surface gravity waves (tides) propagate with a speed proportional to the square root of water depth (c=g(h+η)). As the ratio of free surface displacement to mean depth (η/h) approaches unity the wave will travel noticeably faster at high tide than at low tide, creating asymmetries in the tidal form. This physical process is explained analytically by the increased significance of
Authors
J.C. Warner, D. H. Schoellhamer, C.A. Ruhl, J.R. Burau
Interaction of lateral baroclinic forcing and turbulence in an estuary
Observations of density and velocity in a channel in northern San Francisco Bay show that the onset of vertical density stratification during flood tides is controlled by the balance between the cross-channel baroclinic pressure gradient and vertical mixing due to turbulence. Profiles of velocity, salinity, temperature, and suspended sediment concentration were measured in transects across Suisun
Authors
J.R. Lacy, M.T. Stacey, J.R. Burau, Stephen G. Monismith
Science and Products
Filter Total Items: 65
2011 Georgiana Slough non-physical barrier performance evaluation project report
The Sacramento River and its tributaries support populations of anadromous fish species including winter-run, spring-run, fall-run, and late fall–run Chinook salmon (Oncorhynchus tshawytscha); and steelhead (O. mykiss). Several of these species are listed as threatened or endangered under the California Endangered Species Act (CESA), federal Endangered Species Act (ESA), or both. These species spa
Authors
Ryan R. Reeves, Jacob McQuirk, Khalid Ameri, Russell W. Perry, Jason G. Romine, Theresa L. Liedtke, Jon R. Burau, Aaron R. Blake, Chris Fitzer, Natalie Smith, Steve Pagliughi, Sam Johnston, Kevin Kumagai, Kenneth Cash
The tidally averaged momentum balance in a partially and periodically stratified estuary
Observations of turbulent stresses and mean velocities over an entire spring–neap cycle are used to evaluate the dynamics of tidally averaged flows in a partially stratified estuarine channel. In a depth-averaged sense, the net flow in this channel is up estuary due to interaction of tidal forcing with the geometry of the larger basin. The depth-variable tidally averaged flow has the form of an es
Authors
M.T. Stacey, Matthew L. Brennan, Jon R. Burau, Stephen G. Monismith
Turbulent stresses and secondary currents in a tidal-forced channel with significant curvature and asymmetric bed forms
Acoustic Doppler current profilers are deployed to measure both the mean flow and turbulent properties in a channel with significant curvature. Direct measurements of the Reynolds stress show a significant asymmetry over the tidal cycle where stresses are enhanced during the flood tide and less prominent over the ebb tide. This asymmetry is corroborated by logarithmic fits using 10min10min average
Authors
D.A. Fong, Stephen G. Monismith, M.T. Stacey, J.R. Burau
Dual-RiverSonde measurements of two-dimensional river flow patterns
Two-dimensional river flow patterns have been measured using a pair of RiverSondes in two experiments in the Sacramento-San Joaquin River Delta system of central California during April and October 2007. An experiment was conducted at Walnut Grove, California in order to explore the use of dual RiverSondes to measure flow patterns at a location which is important in the study of juvenile fish migr
Authors
C.C. Teague, D.E. Barrick, P.M. Lilleboe, Ralph T. Cheng, Paul Stumpner, Jon R. Burau
Effects of flow diversions on water and habitat quality: Examples from California's highly manipulated Sacramento–San Joaquin Delta
We use selected monitoring data to illustrate how localized water diversions from seasonal barriers, gate operations, and export pumps alter water quality across the Sacramento-San Joaquin Delta (California). Dynamics of water-quality variability are complex because the Delta is a mixing zone of water from the Sacramento and San Joaquin Rivers, agricultural return water, and the San Francisco Estu
Authors
Nancy E. Monsen, James E. Cloern, Jon R. Burau
Ecological values of shallow-water habitats: Implications for the restoration of disturbed ecosystems
A presumed value of shallow-habitat enhanced pelagic productivity derives from the principle that in nutrient-rich aquatic systems phytoplankton growth rate is controlled by light availability, which varies inversely with habitat depth. We measured a set of biological indicators across the gradient of habitat depth within the Sacramento–San Joaquin River Delta (California) to test the hypothesis t
Authors
C.B. Lopez, J. E. Cloern, T.S. Schraga, A.J. Little, L.V. Lucas, J.K. Thompson, J.R. Burau
Intradaily variability of water quality in a shallow tidal lagoon: Mechanisms and implications
Although surface water quality and its underlying processes vary over time scales ranging from seconds to decades, they have historically been studied at the lower (weekly to interannual) frequencies. The aim of this study was to investigate intradaily variability of three water quality parameters in a small freshwater tidal lagoon (Mildred Island, California). High frequency time series of specif
Authors
L.V. Lucas, D.M. Sereno, J.R. Burau, T.S. Schraga, C.B. Lopez, M.T. Stacey, K.V. Parchevsky, V.P. Parchevsky
Flow convergence caused by a salinity minimum in a tidal channel
Residence times of dissolved substances and sedimentation rates in tidal channels are affected by residual (tidally averaged) circulation patterns. One influence on these circulation patterns is the longitudinal density gradient. In most estuaries the longitudinal density gradient typically maintains a constant direction. However, a junction of tidal channels can create a local reversal (change in
Authors
John C. Warner, David H. Schoellhamer, Jon R. Burau, S. Geoffrey Schladow
Averaged indicators of secondary flow in repeated acoustic Doppler current profiler crossings of bends
Cross‐stream velocity was measured in a large river bend at high spatial resolution over three separate survey episodes. A suite of methods for resolving cross‐stream velocity distributions was tested on data collected using acoustic Doppler current profilers (ADCP) in the sand‐bedded Sacramento River, California. The bend was surveyed with repeated ADCP crossings at eight cross sections during a
Authors
R.L. Dinehart, J.R. Burau
Repeated surveys by acoustic Doppler current profiler for flow and sediment dynamics in a tidal river
A strategy of repeated surveys by acoustic Doppler current profiler (ADCP) was applied in a tidal river to map velocity vectors and suspended-sediment indicators. The Sacramento River at the junction with the Delta Cross Channel at Walnut Grove, California, was surveyed over several tidal cycles in the Fall of 2000 and 2001 with a vessel-mounted ADCP. Velocity profiles were recorded along flow-def
Authors
R.L. Dinehart, J.R. Burau
Floodtide pulses after low tides in shallow subembayments adjacent to deep channels
In shallow waters surface gravity waves (tides) propagate with a speed proportional to the square root of water depth (c=g(h+η)). As the ratio of free surface displacement to mean depth (η/h) approaches unity the wave will travel noticeably faster at high tide than at low tide, creating asymmetries in the tidal form. This physical process is explained analytically by the increased significance of
Authors
J.C. Warner, D. H. Schoellhamer, C.A. Ruhl, J.R. Burau
Interaction of lateral baroclinic forcing and turbulence in an estuary
Observations of density and velocity in a channel in northern San Francisco Bay show that the onset of vertical density stratification during flood tides is controlled by the balance between the cross-channel baroclinic pressure gradient and vertical mixing due to turbulence. Profiles of velocity, salinity, temperature, and suspended sediment concentration were measured in transects across Suisun
Authors
J.R. Lacy, M.T. Stacey, J.R. Burau, Stephen G. Monismith