Robert Jacobson, PhD (Former Employee)
Science and Products
Filter Total Items: 14
Filter Total Items: 141
Quantifying fluid and bed dynamics for characterizing benthic physical habitat in large rivers
Sturgeon use benthic habitats in and adjacent to main channels where environmental conditions can include bedload sediment transport and high near-bed flow velocities. Bed velocity measurements obtained with acoustic Doppler instruments provide a means to assess the concentration and velocity of sediment moving near the streambed, and are thus indicative of the bedload sediment transport rate, the
Authors
D. Gaeuman, R. B. Jacobson
Hydroacoustic mapping to define sedimentation rates and characterize lentic habitats in DeSoto Lake, DeSoto National Wildlife Refuge
Hydroacoustic tools were used to map depth, elevation, and substrate on DeSoto Lake in March 2006. DeSoto Lake, located on the DeSoto National Wildlife Refuge in Iowa and Nebraska, is one of the largest oxbow lakes of the Missouri River system. It is used by over 500,000 migratory birds each fall and spring and is also an important aquatic resource for anglers. Management concerns at the lake incl
Authors
Caroline M. Elliott, Robert B. Jacobson, Kimberly A. Chojnacki
Science to support adaptive habitat management: Overton Bottoms North Unit, Big Muddy National Fish and Wildlife Refuge, Missouri
Extensive efforts are underway along the Lower Missouri River to rehabilitate ecosystem functions in the channel and flood plain. Considerable uncertainty inevitably accompanies ecosystem restoration efforts, indicating the benefits of an adaptive management approach in which management actions are treated as experiments, and results provide information to feed back into the management process. Th
Hydroecological modeling of the Lower Missouri River
No abstract avaikable
Authors
H.E. Johnson, R. B. Jacobson, A. J. DeLonay
Geomorphic Classification and Assessment of Channel Dynamics in the Missouri National Recreational River, South Dakota and Nebraska
A multiscale geomorphic classification was established for the 39-mile, 59-mile, and adjacent segments of the Missouri National Recreational River administered by the National Park Service in South Dakota and Nebraska. The objective of the classification was to define naturally occurring clusters of geomorphic characteristics that would be indicative of discrete sets of geomorphic processes, with
Authors
Caroline M. Elliott, Robert B. Jacobson
Acoustic bed velocity and bed load dynamics in a large sand bed river
Development of a practical technology for rapid quantification of bed load transport in large rivers would represent a revolutionary advance for sediment monitoring and the investigation of fluvial dynamics. Measurement of bed load motion with acoustic Doppler current profiles (ADCPs) has emerged as a promising approach for evaluating bed load transport. However, a better understanding of how ADCP
Authors
D. Gaeuman, R. B. Jacobson
Flow and form in rehabilitation of large-river ecosystems: an example from the Lower Missouri River
On large, intensively engineered rivers like the Lower Missouri, the template of the physical habitat is determined by the nearly independent interaction of channel form and flow regime. We evaluated the interaction between flow and form by modeling four combinations of modern and historical channel form and modern and historical flow regimes. The analysis used shallow, slow water (shallow-water h
Authors
R. B. Jacobson, D.L. Galat
Ecological science and sustainability for the 21st century
Ecological science has contributed greatly to our understanding of the natural world and the impact of humans on that world. Now, we need to refocus the discipline towards research that ensures a future in which natural systems and the humans they include coexist on a more sustainable planet. Acknowledging that managed ecosystems and intensive exploitation of resources define our future, ecologist
Authors
Margaret A. Palmer, Emily S. Bernhardt, Elizabeth A. Chornesky, Scott L. Collins, Andrew P. Dobson, Clifford S. Duke, Barry Gold, Robert B. Jacobson, Sharon E. Kingsland, Rhonda H. Kranz, Michael J. Mappin, M. Luisa Martinez, Fiorenza Micheli, Jennifer L. Morse, Michael L. Pace, Mercedes Pascual, Stephen S. Palumbi, O. J. Reichman, Alan R. Townsend, Monica G. Turner
Effective discharge analysis of ecological processes in streams
Discharge is a master variable that controls many processes in stream ecosystems. However, there is uncertainty of which discharges are most important for driving particular ecological processes and thus how flow regime may influence entire stream ecosystems. Here the analytical method of effective discharge from fluvial geomorphology is used to analyze the interaction between frequency and magnit
Authors
Martin W. Doyle, Emily H. Stanley, David L. Strayer, Robert B. Jacobson, John C. Schmidt
Surficial geologic tools in fluvial geomorphology: chapter 2
No abstract available.
Authors
Robert B. Jacobson, James E. O'Connor, Takashi Oguchi
Aquatic habitat mapping with an acoustic doppler current profiler: Considerations for data quality
When mounted on a boat or other moving platform, acoustic Doppler current profilers (ADCPs) can be used to map a wide range of ecologically significant phenomena, including measures of fluid shear, turbulence, vorticity, and near-bed sediment transport. However, the instrument movement necessary for mapping applications can generate significant errors, many of which have not been inadequately desc
Authors
David Gaeuman, Robert B. Jacobson
Constraints on the geological history of the karst system in Southern Missouri, U.S.A. provided by radiogenic, cosmogenic and physical/chemical characteristics of doline fill
The Ozark Plateaus region of southern Missouri is underlain by dominantly carbonate marine platform rocks of Paleozoic age. The region has been sub-aerially exposed since the late Paleozoic and is characterized by extensive karst. To better understand the geologic history of this regional karst system, we examined the stratigraphic record preserved in the fill of a large doline near the largest sp
Authors
David J. Waery, Richard W. Harrison, Robert B. Jacobson, Milan P. Javich, Shannon A. Mahan, David Wronkiewicz
Non-USGS Publications**
Jacobson, R. B., 1986, Genesis and distribution of colluvium, Buffalo Creek Area, Marion County, West Virginia: Transportation Research Record, Transportation Research Board, v. 1089, p. 63-67.
Jacobson, R. B., and Coleman, D.J., 1986, Stratigraphy and recent evolution of Maryland Piedmont flood plains: American Journal of Science, v. 286, p. 617-637
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 14
Filter Total Items: 141
Quantifying fluid and bed dynamics for characterizing benthic physical habitat in large rivers
Sturgeon use benthic habitats in and adjacent to main channels where environmental conditions can include bedload sediment transport and high near-bed flow velocities. Bed velocity measurements obtained with acoustic Doppler instruments provide a means to assess the concentration and velocity of sediment moving near the streambed, and are thus indicative of the bedload sediment transport rate, the
Authors
D. Gaeuman, R. B. Jacobson
Hydroacoustic mapping to define sedimentation rates and characterize lentic habitats in DeSoto Lake, DeSoto National Wildlife Refuge
Hydroacoustic tools were used to map depth, elevation, and substrate on DeSoto Lake in March 2006. DeSoto Lake, located on the DeSoto National Wildlife Refuge in Iowa and Nebraska, is one of the largest oxbow lakes of the Missouri River system. It is used by over 500,000 migratory birds each fall and spring and is also an important aquatic resource for anglers. Management concerns at the lake incl
Authors
Caroline M. Elliott, Robert B. Jacobson, Kimberly A. Chojnacki
Science to support adaptive habitat management: Overton Bottoms North Unit, Big Muddy National Fish and Wildlife Refuge, Missouri
Extensive efforts are underway along the Lower Missouri River to rehabilitate ecosystem functions in the channel and flood plain. Considerable uncertainty inevitably accompanies ecosystem restoration efforts, indicating the benefits of an adaptive management approach in which management actions are treated as experiments, and results provide information to feed back into the management process. Th
Hydroecological modeling of the Lower Missouri River
No abstract avaikable
Authors
H.E. Johnson, R. B. Jacobson, A. J. DeLonay
Geomorphic Classification and Assessment of Channel Dynamics in the Missouri National Recreational River, South Dakota and Nebraska
A multiscale geomorphic classification was established for the 39-mile, 59-mile, and adjacent segments of the Missouri National Recreational River administered by the National Park Service in South Dakota and Nebraska. The objective of the classification was to define naturally occurring clusters of geomorphic characteristics that would be indicative of discrete sets of geomorphic processes, with
Authors
Caroline M. Elliott, Robert B. Jacobson
Acoustic bed velocity and bed load dynamics in a large sand bed river
Development of a practical technology for rapid quantification of bed load transport in large rivers would represent a revolutionary advance for sediment monitoring and the investigation of fluvial dynamics. Measurement of bed load motion with acoustic Doppler current profiles (ADCPs) has emerged as a promising approach for evaluating bed load transport. However, a better understanding of how ADCP
Authors
D. Gaeuman, R. B. Jacobson
Flow and form in rehabilitation of large-river ecosystems: an example from the Lower Missouri River
On large, intensively engineered rivers like the Lower Missouri, the template of the physical habitat is determined by the nearly independent interaction of channel form and flow regime. We evaluated the interaction between flow and form by modeling four combinations of modern and historical channel form and modern and historical flow regimes. The analysis used shallow, slow water (shallow-water h
Authors
R. B. Jacobson, D.L. Galat
Ecological science and sustainability for the 21st century
Ecological science has contributed greatly to our understanding of the natural world and the impact of humans on that world. Now, we need to refocus the discipline towards research that ensures a future in which natural systems and the humans they include coexist on a more sustainable planet. Acknowledging that managed ecosystems and intensive exploitation of resources define our future, ecologist
Authors
Margaret A. Palmer, Emily S. Bernhardt, Elizabeth A. Chornesky, Scott L. Collins, Andrew P. Dobson, Clifford S. Duke, Barry Gold, Robert B. Jacobson, Sharon E. Kingsland, Rhonda H. Kranz, Michael J. Mappin, M. Luisa Martinez, Fiorenza Micheli, Jennifer L. Morse, Michael L. Pace, Mercedes Pascual, Stephen S. Palumbi, O. J. Reichman, Alan R. Townsend, Monica G. Turner
Effective discharge analysis of ecological processes in streams
Discharge is a master variable that controls many processes in stream ecosystems. However, there is uncertainty of which discharges are most important for driving particular ecological processes and thus how flow regime may influence entire stream ecosystems. Here the analytical method of effective discharge from fluvial geomorphology is used to analyze the interaction between frequency and magnit
Authors
Martin W. Doyle, Emily H. Stanley, David L. Strayer, Robert B. Jacobson, John C. Schmidt
Surficial geologic tools in fluvial geomorphology: chapter 2
No abstract available.
Authors
Robert B. Jacobson, James E. O'Connor, Takashi Oguchi
Aquatic habitat mapping with an acoustic doppler current profiler: Considerations for data quality
When mounted on a boat or other moving platform, acoustic Doppler current profilers (ADCPs) can be used to map a wide range of ecologically significant phenomena, including measures of fluid shear, turbulence, vorticity, and near-bed sediment transport. However, the instrument movement necessary for mapping applications can generate significant errors, many of which have not been inadequately desc
Authors
David Gaeuman, Robert B. Jacobson
Constraints on the geological history of the karst system in Southern Missouri, U.S.A. provided by radiogenic, cosmogenic and physical/chemical characteristics of doline fill
The Ozark Plateaus region of southern Missouri is underlain by dominantly carbonate marine platform rocks of Paleozoic age. The region has been sub-aerially exposed since the late Paleozoic and is characterized by extensive karst. To better understand the geologic history of this regional karst system, we examined the stratigraphic record preserved in the fill of a large doline near the largest sp
Authors
David J. Waery, Richard W. Harrison, Robert B. Jacobson, Milan P. Javich, Shannon A. Mahan, David Wronkiewicz
Non-USGS Publications**
Jacobson, R. B., 1986, Genesis and distribution of colluvium, Buffalo Creek Area, Marion County, West Virginia: Transportation Research Record, Transportation Research Board, v. 1089, p. 63-67.
Jacobson, R. B., and Coleman, D.J., 1986, Stratigraphy and recent evolution of Maryland Piedmont flood plains: American Journal of Science, v. 286, p. 617-637
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.