Gary Shenk (Former Employee)
Science and Products
Filter Total Items: 22
The Chesapeake Bay program modeling system: Overview and recommendations for future development The Chesapeake Bay program modeling system: Overview and recommendations for future development
The Chesapeake Bay is the largest, most productive, and most biologically diverse estuary in the continental United States providing crucial habitat and natural resources for culturally and economically important species. Pressures from human population growth and associated development and agricultural intensification have led to excessive nutrient and sediment inputs entering the Bay...
Authors
Raleigh Hood, Gary W. Shenk, Rachel L Dixon, Sean M. C. Smith, William P. Ball, Jesse Bash, R. Batiuk, Kathy Boomer, Damian C Brady, Carl Cerco, Peter Claggett, Kim de Mutsert, Zachary M. Easton, Andrew J Elmore, Marjorie A. M. Friedrichs, Lora A. Harris, Thomas F. Ihde, Iara Lacher, Li Li, Lewis C. Linker, Andrew Miller, Julia Moriarty, Gregory E. Noe, George Onyullo, Kenneth A Rose, Katherine Skalak, Richard Tian, Tamie L Veith, Lisa A. Wainger, Donald E. Weller, Yinglong J. Zhang
Supporting cost-effective watershed management strategies for Chesapeake Bay using a modeling and optimization framework Supporting cost-effective watershed management strategies for Chesapeake Bay using a modeling and optimization framework
Extensive efforts to adaptively manage nutrient pollution rely on Chesapeake Bay Program's (Phase 6) Watershed Model, called Chesapeake Assessment Scenario Tool (CAST), which helps decision-makers plan and track implementation of Best Management Practices (BMPs). We describe mathematical characteristics of CAST and develop a constrained nonlinear BMP-subset model, software, and...
Authors
Daniel E Kaufman, Gary W. Shenk, Gopal Bhatt, Kevin Asplen, Olivia H. Devereux, Jessica Rigelman, J. Hugh Ellis, Benjamin F Hobbs, Darrell J Bosch, George L Van Houtven, Arthur E McGarity, Lewis C. Linker, William P. Ball
Advancing estuarine ecological forecasts: Seasonal hypoxia in Chesapeake Bay Advancing estuarine ecological forecasts: Seasonal hypoxia in Chesapeake Bay
Ecological forecasts are quantitative tools that can guide ecosystem management. The coemergence of extensive environmental monitoring and quantitative frameworks allows for widespread development and continued improvement of ecological forecasting systems. We use a relatively simple estuarine hypoxia model to demonstrate advances in addressing some of the most critical challenges and
Authors
Donald Scavia, Isabella Bertani, Jeremy M. Testa, Aaron J. Bever, Joel Blomquist, Marjorie A. M. Friedrichs, Lewis C. Linker, Bruce Michael, Rebecca Murphy, Gary W. Shenk
Mechanisms controlling climate warming impact on the occurrence of hypoxia in Chesapeake Bay Mechanisms controlling climate warming impact on the occurrence of hypoxia in Chesapeake Bay
AClimate change represents an increasing stressor on estuarine and coastal ecosystems. A series of simulations were run using the Integrated Compartment Water Quality Model to determine the magnitude of various mechanisms controlling the effect of climate warming on dissolved oxygen (DO) in the Chesapeake Bay. The results suggested that the average hypoxic volume in the summer would...
Authors
Richard Tian, Carl Cerco, Gopal Bhatt, Lewis C. Linker, Gary W. Shenk
Atmospheric nitrogen deposition in the Chesapeake Bay watershed: A history of change Atmospheric nitrogen deposition in the Chesapeake Bay watershed: A history of change
The Chesapeake Bay watershed has been the focus of pioneering studies of the role of atmospheric nitrogen (N) deposition as a nutrient source and driver of estuarine trophic status. Here, we review the history and evolution of scientific investigations of the role of atmospheric N deposition, examine trends from wet and dry deposition networks, and present century-long (1950–2050)...
Authors
Douglas A. Burns, Gopal Bhatt, Lewis C. Linker, Jesse Bash, Paul Capel, Gary W. Shenk
Socio-technical scales in socio-environmental modeling: Managing a system-of-systems modeling approach Socio-technical scales in socio-environmental modeling: Managing a system-of-systems modeling approach
System-of-systems approaches for integrated assessments have become prevalent in recent years. Such approaches integrate a variety of models from different disciplines and modeling paradigms to represent a socio-environmental (or social-ecological) system aiming to holistically inform policy and decision-making processes. Central to the system-of-systems approaches is the representation...
Authors
Takuya Iwanaga, Hsiao-Hsuan Wang, Serena Hamilton, Volker Grimm, Tomasz Koralewski, Alejandro Salado, Sondoss Elsawah, Saman Razavi, Jing-Feng Yang, Pierre D. Glynn, Jennifer Badham, Alexey Voinov, Mingshu Chen, William Grant, Tarla Peterson, Karin Frank, Gary W. Shenk, C. Michael Barton, Anthony J. Jakeman, John C. Little
Sediment dynamics and implications for management: State of the science from long‐term research in the Chesapeake Bay watershed, USA Sediment dynamics and implications for management: State of the science from long‐term research in the Chesapeake Bay watershed, USA
This review aims to synthesize the current knowledge of sediment dynamics using insights from long‐term research conducted in the watershed draining to the Chesapeake Bay, the largest estuary in the U.S., to inform management actions to restore the estuary and its watershed. The sediment dynamics of the Chesapeake are typical of many impaired watersheds and estuaries around the world...
Authors
Gregory E. Noe, Matthew J. Cashman, Katherine Skalak, Allen C. Gellis, Kristina G. Hopkins, Douglas L. Moyer, James S. Webber, Adam Benthem, Kelly O. Maloney, John Brakebill, Andrew J. Sekellick, Michael J. Langland, Qian Zhang, Gary W. Shenk, Jennifer L. D. Keisman, Cliff R. Hupp
Phosphorus and the Chesapeake Bay: Lingering issues and emerging concerns for agriculture Phosphorus and the Chesapeake Bay: Lingering issues and emerging concerns for agriculture
Hennig Brandt's discovery of phosphorus (P) occurred during the early European colonization of the Chesapeake Bay region. Today, P, an essential nutrient on land and water alike, is one of the principal threats to the health of the bay. Despite widespread implementation of best management practices across the Chesapeake Bay watershed following the implementation in 2010 of a total...
Authors
Peter Kleinman, Rosemary M. Fanelli, Robert M. Hirsch, Anthony R Buda, Zachary M. Easton, Lisa A. Wainger, Chris Brosch, Mark Lowenfish, Amy S. Collick, Adel Shirmohammadi, Kathy Boomer, Jason A. Hubbart, R. B. Bryant, Gary Shenk
Sediment calibration strategies of Phase 5 Chesapeake Bay watershed model Sediment calibration strategies of Phase 5 Chesapeake Bay watershed model
Sediment is a primary constituent of concern for Chesapeake Bay due to its effect on water clarity. Accurate representation of sediment processes and behavior in Chesapeake Bay watershed model is critical for developing sound load reduction strategies. Sediment calibration remains one of the most difficult components of watershed-scale assessment. This is especially true for Chesapeake...
Authors
J. Wu, G.W. Shenk, Jeff P. Raffensperger, D. Moyer, L.C. Linker
Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed
Trends in nutrient loads and flow-adjusted concentrations in the major rivers entering Chesapeake Bay were computed on the basis of water-quality data collected between 1985 and 1998 at 29 monitoring stations in the Susquehanna, Potomac, James, Rappahannock, York, Patuxent, and Choptank River Basins. Two computer models?the Chesapeake Bay Watershed Model (WSM) and the U.S. Geological...
Authors
Lori A. Sprague, M. J. Langland, S.E. Yochum, R. E. Edwards, J. D. Blomquist, S.W. Phillips, G.W. Shenk, S. D. Preston
Science and Products
Filter Total Items: 22
The Chesapeake Bay program modeling system: Overview and recommendations for future development The Chesapeake Bay program modeling system: Overview and recommendations for future development
The Chesapeake Bay is the largest, most productive, and most biologically diverse estuary in the continental United States providing crucial habitat and natural resources for culturally and economically important species. Pressures from human population growth and associated development and agricultural intensification have led to excessive nutrient and sediment inputs entering the Bay...
Authors
Raleigh Hood, Gary W. Shenk, Rachel L Dixon, Sean M. C. Smith, William P. Ball, Jesse Bash, R. Batiuk, Kathy Boomer, Damian C Brady, Carl Cerco, Peter Claggett, Kim de Mutsert, Zachary M. Easton, Andrew J Elmore, Marjorie A. M. Friedrichs, Lora A. Harris, Thomas F. Ihde, Iara Lacher, Li Li, Lewis C. Linker, Andrew Miller, Julia Moriarty, Gregory E. Noe, George Onyullo, Kenneth A Rose, Katherine Skalak, Richard Tian, Tamie L Veith, Lisa A. Wainger, Donald E. Weller, Yinglong J. Zhang
Supporting cost-effective watershed management strategies for Chesapeake Bay using a modeling and optimization framework Supporting cost-effective watershed management strategies for Chesapeake Bay using a modeling and optimization framework
Extensive efforts to adaptively manage nutrient pollution rely on Chesapeake Bay Program's (Phase 6) Watershed Model, called Chesapeake Assessment Scenario Tool (CAST), which helps decision-makers plan and track implementation of Best Management Practices (BMPs). We describe mathematical characteristics of CAST and develop a constrained nonlinear BMP-subset model, software, and...
Authors
Daniel E Kaufman, Gary W. Shenk, Gopal Bhatt, Kevin Asplen, Olivia H. Devereux, Jessica Rigelman, J. Hugh Ellis, Benjamin F Hobbs, Darrell J Bosch, George L Van Houtven, Arthur E McGarity, Lewis C. Linker, William P. Ball
Advancing estuarine ecological forecasts: Seasonal hypoxia in Chesapeake Bay Advancing estuarine ecological forecasts: Seasonal hypoxia in Chesapeake Bay
Ecological forecasts are quantitative tools that can guide ecosystem management. The coemergence of extensive environmental monitoring and quantitative frameworks allows for widespread development and continued improvement of ecological forecasting systems. We use a relatively simple estuarine hypoxia model to demonstrate advances in addressing some of the most critical challenges and
Authors
Donald Scavia, Isabella Bertani, Jeremy M. Testa, Aaron J. Bever, Joel Blomquist, Marjorie A. M. Friedrichs, Lewis C. Linker, Bruce Michael, Rebecca Murphy, Gary W. Shenk
Mechanisms controlling climate warming impact on the occurrence of hypoxia in Chesapeake Bay Mechanisms controlling climate warming impact on the occurrence of hypoxia in Chesapeake Bay
AClimate change represents an increasing stressor on estuarine and coastal ecosystems. A series of simulations were run using the Integrated Compartment Water Quality Model to determine the magnitude of various mechanisms controlling the effect of climate warming on dissolved oxygen (DO) in the Chesapeake Bay. The results suggested that the average hypoxic volume in the summer would...
Authors
Richard Tian, Carl Cerco, Gopal Bhatt, Lewis C. Linker, Gary W. Shenk
Atmospheric nitrogen deposition in the Chesapeake Bay watershed: A history of change Atmospheric nitrogen deposition in the Chesapeake Bay watershed: A history of change
The Chesapeake Bay watershed has been the focus of pioneering studies of the role of atmospheric nitrogen (N) deposition as a nutrient source and driver of estuarine trophic status. Here, we review the history and evolution of scientific investigations of the role of atmospheric N deposition, examine trends from wet and dry deposition networks, and present century-long (1950–2050)...
Authors
Douglas A. Burns, Gopal Bhatt, Lewis C. Linker, Jesse Bash, Paul Capel, Gary W. Shenk
Socio-technical scales in socio-environmental modeling: Managing a system-of-systems modeling approach Socio-technical scales in socio-environmental modeling: Managing a system-of-systems modeling approach
System-of-systems approaches for integrated assessments have become prevalent in recent years. Such approaches integrate a variety of models from different disciplines and modeling paradigms to represent a socio-environmental (or social-ecological) system aiming to holistically inform policy and decision-making processes. Central to the system-of-systems approaches is the representation...
Authors
Takuya Iwanaga, Hsiao-Hsuan Wang, Serena Hamilton, Volker Grimm, Tomasz Koralewski, Alejandro Salado, Sondoss Elsawah, Saman Razavi, Jing-Feng Yang, Pierre D. Glynn, Jennifer Badham, Alexey Voinov, Mingshu Chen, William Grant, Tarla Peterson, Karin Frank, Gary W. Shenk, C. Michael Barton, Anthony J. Jakeman, John C. Little
Sediment dynamics and implications for management: State of the science from long‐term research in the Chesapeake Bay watershed, USA Sediment dynamics and implications for management: State of the science from long‐term research in the Chesapeake Bay watershed, USA
This review aims to synthesize the current knowledge of sediment dynamics using insights from long‐term research conducted in the watershed draining to the Chesapeake Bay, the largest estuary in the U.S., to inform management actions to restore the estuary and its watershed. The sediment dynamics of the Chesapeake are typical of many impaired watersheds and estuaries around the world...
Authors
Gregory E. Noe, Matthew J. Cashman, Katherine Skalak, Allen C. Gellis, Kristina G. Hopkins, Douglas L. Moyer, James S. Webber, Adam Benthem, Kelly O. Maloney, John Brakebill, Andrew J. Sekellick, Michael J. Langland, Qian Zhang, Gary W. Shenk, Jennifer L. D. Keisman, Cliff R. Hupp
Phosphorus and the Chesapeake Bay: Lingering issues and emerging concerns for agriculture Phosphorus and the Chesapeake Bay: Lingering issues and emerging concerns for agriculture
Hennig Brandt's discovery of phosphorus (P) occurred during the early European colonization of the Chesapeake Bay region. Today, P, an essential nutrient on land and water alike, is one of the principal threats to the health of the bay. Despite widespread implementation of best management practices across the Chesapeake Bay watershed following the implementation in 2010 of a total...
Authors
Peter Kleinman, Rosemary M. Fanelli, Robert M. Hirsch, Anthony R Buda, Zachary M. Easton, Lisa A. Wainger, Chris Brosch, Mark Lowenfish, Amy S. Collick, Adel Shirmohammadi, Kathy Boomer, Jason A. Hubbart, R. B. Bryant, Gary Shenk
Sediment calibration strategies of Phase 5 Chesapeake Bay watershed model Sediment calibration strategies of Phase 5 Chesapeake Bay watershed model
Sediment is a primary constituent of concern for Chesapeake Bay due to its effect on water clarity. Accurate representation of sediment processes and behavior in Chesapeake Bay watershed model is critical for developing sound load reduction strategies. Sediment calibration remains one of the most difficult components of watershed-scale assessment. This is especially true for Chesapeake...
Authors
J. Wu, G.W. Shenk, Jeff P. Raffensperger, D. Moyer, L.C. Linker
Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed Factors affecting nutrient trends in major rivers of the Chesapeake Bay Watershed
Trends in nutrient loads and flow-adjusted concentrations in the major rivers entering Chesapeake Bay were computed on the basis of water-quality data collected between 1985 and 1998 at 29 monitoring stations in the Susquehanna, Potomac, James, Rappahannock, York, Patuxent, and Choptank River Basins. Two computer models?the Chesapeake Bay Watershed Model (WSM) and the U.S. Geological...
Authors
Lori A. Sprague, M. J. Langland, S.E. Yochum, R. E. Edwards, J. D. Blomquist, S.W. Phillips, G.W. Shenk, S. D. Preston