Kevin A Oberg (Former Employee)
Science and Products
Filter Total Items: 65
Bed morphology, flow structure, and sediment transport at the outlet of Lake Huron and in the upper St. Clair River
An integrated multibeam echo sounder and acoustic Doppler current profiler field survey was conducted in July 2008 to investigate the morphodynamics of the St. Clair River at the outlet of Lake Huron. The principal morphological features of the upper St. Clair River included flow-transverse bedforms that appear weakly mobile, erosive bedforms in cohesive muds, thin non-cohesive veneers of weakly m
Authors
J. A. Czuba, J.L. Best, K. A. Oberg, D.R. Parsons, P.R. Jackson, M.H. Garcia, P. Ashmore
Discussion of Near-Transducer Errors in ADCP Measurements: Experimental Findings by Marian Muste, Dongsu Kim, and Juan A Gonzalez-Castro
No abstract available.
Authors
David S. Mueller, Kevin A. Oberg
A new methodology for the quantitative visualization of coherent flow structures in alluvial channels using multibeam echo-sounding (MBES)
In order to investigate the interactions between turbulence and suspended sediment transport in natural aqueous environments, we ideally require a technique that allows simultaneous measurement of fluid velocity and sediment concentration for the whole flow field. Here, we report on development of a methodology using the water column acoustic backscatter signal from a multibeam echo sounder to sim
Authors
Jim Best, Stephen Simmons, Daniel Parsons, Kevin Oberg, Jonathan Czuba, Chris Malzone
Velocity mapping in the Lower Congo River: A first look at the unique bathymetry and hydrodynamics of Bulu Reach
The lower Congo River is one of the deepest, most powerful, and most biologically diverse stretches of river on Earth. The river’s 270 m decent from Malebo Pool though the gorges of the Crystal Mountains to the Atlantic Ocean (498 km downstream) is riddled with rapids, cataracts, and deep pools. Much of the lower Congo is a mystery from a hydraulics perspective. However, this stretch of the river
Authors
P. Ryan Jackson, Kevin A. Oberg, Ned Gardiner, John Shelton
Temporal characteristics of coherent flow structures generated over alluvial sand dunes, Mississippi River, revealed by acoustic doppler current profiling and multibeam echo sounding
This paper investigates the flow in the lee of a large sand dune located at the confluence of the Mississippi and Missouri Rivers, USA. Stationary profiles collected from an anchored boat using an acoustic Doppler current profiler (ADCP) were georeferenced with data from a real-time kinematic differential global positioning system. A multibeam echo sounder was used to map the bathymetry of the con
Authors
John A. Czuba, Kevin A. Oberg, Jim L. Best, Daniel R. Parsons, S. M. Simmons, K. K. Johnson, C. Malzone
Discharge and other hydraulic measurements for characterizing the hydraulics of Lower Congo River
The first direct measurements of discharge of the Lower Congo River below Malebo Pool and upstream from Kinganga, Democratic Republic of Congo (DRC) were made in July 2008 using acoustic Doppler current profilers, differential GPS, and echo sounders. These measurements were made in support of research that is attempting to understand the distribution of fish species in the Lower Congo River and re
Authors
Kevin Oberg, John M. Shelton, Ned Gardiner, P. Ryan Jackson
The effect of channel shape, bed morphology, and shipwrecks on flow velocities in the Upper St. Clair River
In the Great Lakes of North America, the St. Clair River is the major outlet of Lake Huron and conveys water to Lake St. Clair which then flows to Lake Erie. One major topic of interest is morphological change in the St. Clair River and its impact on water levels in the Upper Great Lakes and connecting channel flows. A combined multibeam echosounder (MBES) bathymetric survey and acoustic Doppler c
Authors
Jonathan A. Czuba, Kevin Oberg, Jim Best, Daniel R. Parsons
Laboratory evaluation of an OTT acoustic digital current meter and a SonTek Laboratory acoustic Doppler velocimeter
Recently, an acoustic current meter known as the OTT * acoustic digital current meter (ADC) was introduced as an alternative instrument for stream gaging measurements. The Bureau of Reclamation and the U.S. Geological Survey collaborated on a side- by-side evaluation of the ADC and a SonTek/YSI acoustic Doppler velocimeter (ADV). Measurements were carried out in a laboratory flume to evaluate the
Authors
T.B. Vermeyen, Kevin A. Oberg, Patrick Ryan Jackson
Acoustic Doppler current profiler applications used in rivers and estuaries by the U.S. Geological Survey
The U.S. Geological Survey (USGS) has collected streamflow information for the Nation's streams since 1889. Streamflow information is used to predict floods, manage and allocate water resources, design engineering structures, compute water-quality loads, and operate water-control structures. The current (2007) size of the USGS streamgaging network is over 7,400 streamgages nationwide. The USGS has
Authors
Anthony J. Gotvald, Kevin A. Oberg
Measuring discharge with ADCPs: Inferences from synthetic velocity profiles
Synthetic velocity profiles are used to determine guidelines for sampling discharge with acoustic Doppler current profilers (ADCPs). The analysis allows the effects of instrument characteristics, sampling parameters, and properties of the flow to be studied systematically. For mid-section measurements, the averaging time required for a single profile measurement always exceeded the 40 s usually re
Authors
C.R. Rehmann, D. S. Mueller, K. A. Oberg
Validation of exposure time for discharge measurements made with two bottom-tracking acoustic doppler current profilers
Previous work by Oberg and Mueller of the U.S. Geological Survey in 2007 concluded that exposure time (total time spent sampling the flow) is a critical factor in reducing measurement uncertainty. In a subsequent paper, Oberg and Mueller validated these conclusions using one set of data to show that the effect of exposure time on the uncertainty of the measured discharge is independent of stream w
Authors
J. A. Czuba, K. Oberg
Density currents in the Chicago River: Characterization, effects on water quality, and potential sources
Bidirectional flows in a river system can occur under stratified flow conditions and in addition to creating significant errors in discharge estimates, the upstream propagating currents are capable of transporting contaminants and affecting water quality. Detailed field observations of bidirectional flows were made in the Chicago River in Chicago, Illinois in the winter of 2005-06. Using multiple
Authors
P.R. Jackson, C.M. Garcia, K. A. Oberg, K. K. Johnson, M.H. Garcia
Science and Products
Filter Total Items: 65
Bed morphology, flow structure, and sediment transport at the outlet of Lake Huron and in the upper St. Clair River
An integrated multibeam echo sounder and acoustic Doppler current profiler field survey was conducted in July 2008 to investigate the morphodynamics of the St. Clair River at the outlet of Lake Huron. The principal morphological features of the upper St. Clair River included flow-transverse bedforms that appear weakly mobile, erosive bedforms in cohesive muds, thin non-cohesive veneers of weakly m
Authors
J. A. Czuba, J.L. Best, K. A. Oberg, D.R. Parsons, P.R. Jackson, M.H. Garcia, P. Ashmore
Discussion of Near-Transducer Errors in ADCP Measurements: Experimental Findings by Marian Muste, Dongsu Kim, and Juan A Gonzalez-Castro
No abstract available.
Authors
David S. Mueller, Kevin A. Oberg
A new methodology for the quantitative visualization of coherent flow structures in alluvial channels using multibeam echo-sounding (MBES)
In order to investigate the interactions between turbulence and suspended sediment transport in natural aqueous environments, we ideally require a technique that allows simultaneous measurement of fluid velocity and sediment concentration for the whole flow field. Here, we report on development of a methodology using the water column acoustic backscatter signal from a multibeam echo sounder to sim
Authors
Jim Best, Stephen Simmons, Daniel Parsons, Kevin Oberg, Jonathan Czuba, Chris Malzone
Velocity mapping in the Lower Congo River: A first look at the unique bathymetry and hydrodynamics of Bulu Reach
The lower Congo River is one of the deepest, most powerful, and most biologically diverse stretches of river on Earth. The river’s 270 m decent from Malebo Pool though the gorges of the Crystal Mountains to the Atlantic Ocean (498 km downstream) is riddled with rapids, cataracts, and deep pools. Much of the lower Congo is a mystery from a hydraulics perspective. However, this stretch of the river
Authors
P. Ryan Jackson, Kevin A. Oberg, Ned Gardiner, John Shelton
Temporal characteristics of coherent flow structures generated over alluvial sand dunes, Mississippi River, revealed by acoustic doppler current profiling and multibeam echo sounding
This paper investigates the flow in the lee of a large sand dune located at the confluence of the Mississippi and Missouri Rivers, USA. Stationary profiles collected from an anchored boat using an acoustic Doppler current profiler (ADCP) were georeferenced with data from a real-time kinematic differential global positioning system. A multibeam echo sounder was used to map the bathymetry of the con
Authors
John A. Czuba, Kevin A. Oberg, Jim L. Best, Daniel R. Parsons, S. M. Simmons, K. K. Johnson, C. Malzone
Discharge and other hydraulic measurements for characterizing the hydraulics of Lower Congo River
The first direct measurements of discharge of the Lower Congo River below Malebo Pool and upstream from Kinganga, Democratic Republic of Congo (DRC) were made in July 2008 using acoustic Doppler current profilers, differential GPS, and echo sounders. These measurements were made in support of research that is attempting to understand the distribution of fish species in the Lower Congo River and re
Authors
Kevin Oberg, John M. Shelton, Ned Gardiner, P. Ryan Jackson
The effect of channel shape, bed morphology, and shipwrecks on flow velocities in the Upper St. Clair River
In the Great Lakes of North America, the St. Clair River is the major outlet of Lake Huron and conveys water to Lake St. Clair which then flows to Lake Erie. One major topic of interest is morphological change in the St. Clair River and its impact on water levels in the Upper Great Lakes and connecting channel flows. A combined multibeam echosounder (MBES) bathymetric survey and acoustic Doppler c
Authors
Jonathan A. Czuba, Kevin Oberg, Jim Best, Daniel R. Parsons
Laboratory evaluation of an OTT acoustic digital current meter and a SonTek Laboratory acoustic Doppler velocimeter
Recently, an acoustic current meter known as the OTT * acoustic digital current meter (ADC) was introduced as an alternative instrument for stream gaging measurements. The Bureau of Reclamation and the U.S. Geological Survey collaborated on a side- by-side evaluation of the ADC and a SonTek/YSI acoustic Doppler velocimeter (ADV). Measurements were carried out in a laboratory flume to evaluate the
Authors
T.B. Vermeyen, Kevin A. Oberg, Patrick Ryan Jackson
Acoustic Doppler current profiler applications used in rivers and estuaries by the U.S. Geological Survey
The U.S. Geological Survey (USGS) has collected streamflow information for the Nation's streams since 1889. Streamflow information is used to predict floods, manage and allocate water resources, design engineering structures, compute water-quality loads, and operate water-control structures. The current (2007) size of the USGS streamgaging network is over 7,400 streamgages nationwide. The USGS has
Authors
Anthony J. Gotvald, Kevin A. Oberg
Measuring discharge with ADCPs: Inferences from synthetic velocity profiles
Synthetic velocity profiles are used to determine guidelines for sampling discharge with acoustic Doppler current profilers (ADCPs). The analysis allows the effects of instrument characteristics, sampling parameters, and properties of the flow to be studied systematically. For mid-section measurements, the averaging time required for a single profile measurement always exceeded the 40 s usually re
Authors
C.R. Rehmann, D. S. Mueller, K. A. Oberg
Validation of exposure time for discharge measurements made with two bottom-tracking acoustic doppler current profilers
Previous work by Oberg and Mueller of the U.S. Geological Survey in 2007 concluded that exposure time (total time spent sampling the flow) is a critical factor in reducing measurement uncertainty. In a subsequent paper, Oberg and Mueller validated these conclusions using one set of data to show that the effect of exposure time on the uncertainty of the measured discharge is independent of stream w
Authors
J. A. Czuba, K. Oberg
Density currents in the Chicago River: Characterization, effects on water quality, and potential sources
Bidirectional flows in a river system can occur under stratified flow conditions and in addition to creating significant errors in discharge estimates, the upstream propagating currents are capable of transporting contaminants and affecting water quality. Detailed field observations of bidirectional flows were made in the Chicago River in Chicago, Illinois in the winter of 2005-06. Using multiple
Authors
P.R. Jackson, C.M. Garcia, K. A. Oberg, K. K. Johnson, M.H. Garcia
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government