Article
Environmental Sciences
R. J. Fox, T. R. Fisher, A. B. Gustafson, E. L. Koontz, M. Lepori-Bui, K. L. Kvalnes, D. E. Bunnell-Young, J. R. Gardner, J. Lewis, J. R. Winsten, K. A. Fisher, K. Silaphone
Summary: The study found that the current management approach of primarily voluntary, untargeted BMP implementation is insufficient to achieve detectable, widespread reductions in N, P, and TSS concentrations in agricultural watersheds of the Choptank basin. Greater outreach and more financial support for farmers to implement BMPs are required to achieve regional water quality goals.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Computer Science, Interdisciplinary Applications
Daniel E. Kaufman, Gary W. Shenk, Gopal Bhatt, Kevin W. Asplen, Olivia H. Devereux, Jessica R. Rigelman, J. Hugh Ellis, Benjamin F. Hobbs, Darrell J. Bosch, George L. Van Houtven, Arthur E. McGarity, Lewis C. Linker, William P. Ball
Summary: Efforts to manage nutrient pollution in Chesapeake Bay rely on the Chesapeake Assessment Scenario Tool (CAST), which provides an optimization framework for exploring least-cost strategies of pollutant load control. The framework allows decision-makers to plan and track implementation of Best Management Practices (BMPs) and has been demonstrated to improve modelled cost when compared to jurisdiction plans. Stakeholder feedback highlights its utility for investigating cost-effective tradeoffs and as a foundation for future restoration strategy analysis.
ENVIRONMENTAL MODELLING & SOFTWARE
(2021)
Article
Engineering, Environmental
Gopal Bhatt, Lewis Linker, Gary Shenk, Isabella Bertani, Richard Tian, Jessica Rigelman, Kyle Hinson, Peter Claggett
Summary: This article examines the vulnerability of the Chesapeake Bay watershed to the combined pressures of climate change and growth in population, agricultural intensity, and economic activity for the period of 1995-2055. The results project increasing annual precipitation, air temperature, potential evapotranspiration, and population growth. The watershed model shows incremental increases in streamflow, nitrogen, phosphorus, and sediment loads to the tidal Bay due to climate change, while growth in population, agricultural intensity, development, and economic activity result in relatively smaller increases in loads.
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2023)
Article
Environmental Sciences
Stephanie Gordon, Tyler Wagner, Kelly Smalling, Olivia Devereux
Summary: Best management practices (BMPs) have been successful in reducing nutrient and sediment loads entering the Chesapeake Bay watershed. A study found that BMP intensity on agricultural land can reduce total estrogenic activity. Additionally, watersheds with high agriculture and low BMPs have a higher probability of exceeding an effects-based threshold.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
Douglas A. Burns, Gopal Bhatt, Lewis C. Linker, Jesse O. Bash, Paul D. Capel, Gary W. Shenk
Summary: The atmospheric nitrogen deposition in the Chesapeake Bay watershed has been an important focus of research as a nutrient source and driver of estuarine trophic status. Historical data shows that the proportion of atmospheric nitrogen deposition in the watershed increased from 30% in 1950 to a peak of 40% in 1973, and then declined to 28% by 2015. This highlights the significant role of atmospheric nitrogen deposition in the Chesapeake Bay watershed and the potential for reducing deposition to improve water quality.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Agriculture, Multidisciplinary
Curt A. McConnell, Rachel K. N. Rozum, Yuning Shi, Armen R. Kemanian
Summary: Interseeding cover crops can reduce nitrogen leaching and provide ecosystem services in the Chesapeake Bay Watershed. However, it may also negatively impact corn yield. This study provides insights for future field experiments and crop management.
AGRICULTURAL SYSTEMS
(2023)
Article
Environmental Sciences
Luke T. Frankel, Marjorie A. M. Friedrichs, Pierre St-Laurent, Aaron J. Bever, Romuald N. Lipcius, Gopal Bhatt, Gary W. Shenk
Summary: The study found that nitrogen reductions since 1985 have decreased hypoxia in Chesapeake Bay, but the improvement from nitrogen reductions was offset by Bay warming, thus the actual effect of nitrogen reductions was smaller than expected. This indicates that greater reductions are needed to counteract the ever-increasing impacts of climate change.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Alicia Reitz, Erika Hemric, Kimberlee K. Hall
Summary: The study evaluated the influence factors of fecal pollution sources and transport in the Tuckasegee River watershed in Western North Carolina using a multivariate statistical approach, finding that fecal pollution is influenced by factors such as surface runoff, soil erosion, and chemical parameters. Results showed that chemical parameters can serve as effective predictors of fecal pollution, aiding in the identification of pollution sources and development of effective TMDLs.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Biodiversity Conservation
Paul McLaughlin, Richard Alexander, Joel Blomquist, Olivia Devereux, Greg Noe, Kelly Smalling, Tyler Wagner
Summary: This study investigates the power and timelines to detect nutrient reductions in the Chesapeake Watershed due to BMP implementation. Using SPARROW models, it is found that reductions of 30-60% are needed in the nitrogen model, while reductions of over 80% are not detectable in the phosphorus model. The timelines to detect reductions in nitrogen flux range from 11 to several hundred years depending on the rates-of-change and management scenarios.
ECOLOGICAL INDICATORS
(2022)
Article
Environmental Sciences
Zheng Cui, James Price Dillard, Juliet Pinto, Andrew High, J. J. De la Cruz, Stephen Mainzer, Charles Andrew Cole
Summary: This study analyzed newspaper articles referencing the Chesapeake Bay Watershed and found substantial variations in coverage frequency across different times and places, but with low absolute levels of coverage. Multidimensional scaling revealed differing structures of collective identity based on location, possibly due to demographic and environmental characteristics as well as proximity to the Bay. The media contributes to collective identity among residents of the watershed in a complex and heterogeneous manner.
ENVIRONMENTAL MANAGEMENT
(2022)
Correction
Ecology
James J. Willacker, Collin A. Eagles-Smith, Vicki S. Blazer
Summary: A correction notice has been published for this paper, please refer to the link for details.
Article
Green & Sustainable Science & Technology
Jong Mun Lee, Minji Park, Bae Kyung Park, Jiyeon Choi, Jinsun Kim, Kyunghyun Kim, Yongseok Kim
Summary: Urbanization leads to increasing impervious areas in watersheds, distorting healthy water circulation systems. This study tested impervious area management goals using the HSPF watershed model, finding that reducing impervious cover can improve water circulation rate, decrease direct runoff and nonpoint source load.
Article
Environmental Sciences
Tyler Wagner, Paul McLaughlin, Kelly Smalling, Sara Breitmeyer, Stephanie Gordon, Gregory B. Noe
Summary: The study found that long-term monitoring at multiple sites is required to fully understand regional trends in chemical contaminant concentrations in rivers, while short-term monitoring periods are insufficient to detect these changes. Additionally, total estrogenicity may be a useful indicator.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Ecology
Raleigh R. Hood, Gary W. Shenk, Rachel L. Dixon, Sean M. C. Smith, William P. Ball, Jesse O. Bash, Rich 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, Lara Lacher, Li Li, Lewis C. Linker, Andrew Miller, Julia Moriarty, Gregory B. Noe, George E. Onyullo, Kenneth Rose, Katie Skalak, Richard Tian, Tamie L. Veith, Lisa Wainger, Donald Weller, Yinglong Joseph Zhang
Summary: The Chesapeake Bay is the largest, most productive, and most biologically diverse estuary in the continental United States, but it is negatively impacted by excessive nutrient and sediment inputs from human activities. The Chesapeake Bay Program is a unique partnership created to guide and promote restoration efforts, with a focus on improving simulation of watershed inputs and estuarine water quality to enhance local nutrient and sediment management plans. Effective collaborations among stakeholders and transparent processes are emphasized for successful modeling system improvements and better communication of outcomes.
ECOLOGICAL MODELLING
(2021)
Article
Environmental Sciences
Shufen Pan, Zihao Bian, Hanqin Tian, Yuanzhi Yao, Raymond G. Najjar, Marjorie A. M. Friedrichs, Eileen E. Hofmann, Rongting Xu, Bowen Zhang
Summary: This study examined nitrogen export from the Chesapeake Bay watershed since 1900 and found that the export of ammonium and nitrate increased until the 1990s and then declined. Precipitation was the primary driver of interannual variability in nitrogen export, while wastewater discharge explained most of the long-term changes in ammonium and organic nitrogen fluxes. Atmospheric deposition, wastewater, and synthetic fertilizer were responsible for the trend of nitrate export. Management of terrestrial non-point source nutrients will be crucial in achieving water quality goals.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Environmental Sciences
Ping Wang, Lewis C. Linker, Gary W. Shenk
ENVIRONMENTAL MODELING & ASSESSMENT
(2016)
Article
Environmental Sciences
Lewis C. Linker, Richard A. Batiuk, Carl F. Cerco, Gary W. Shenk, Richard Tian, Ping Wang, Guido Yactayo
JOURNAL OF ENVIRONMENTAL QUALITY
(2016)
Article
Environmental Sciences
Alisha Spears Mulkey, Frank J. Coale, Peter A. Vadas, Gary W. Shenk, Gopal X. Bhatt
JOURNAL OF ENVIRONMENTAL QUALITY
(2017)
Review
Engineering, Environmental
Kathleen M. B. Boomer, Donald E. Weller, Thomas E. Jordan, Lewis Linker, Zhi-Jun Liu, James Reilly, Gary Shenk, Alexey A. Voinov
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2013)
Article
Engineering, Environmental
Lewis C. Linker, Richard A. Batiuk, Gary W. Shenk, Carl F. Cerco
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2013)
Article
Engineering, Environmental
Jeni Keisman, Gary Shenk
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2013)
Article
Engineering, Environmental
Lewis C. Linker, Robin Dennis, Gary W. Shenk, Richard A. Batiuk, Jeffrey Grimm, Ping Wang
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2013)
Article
Engineering, Environmental
Gary W. Shenk, Lewis C. Linker
JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
(2013)
Article
Environmental Sciences
Troy A. Keller, Gary W. Shenk, Michael R. Williams, Richard A. Batiuk
RIVER RESEARCH AND APPLICATIONS
(2011)
Review
Environmental Sciences
Gregory B. Noe, Matthew J. Cashman, Katie Skalak, Allen Gellis, Kristina G. Hopkins, Doug Moyer, James Webber, Adam Benthem, Kelly Maloney, John Brakebill, Andrew Sekellick, Mike Langland, Qian Zhang, Gary Shenk, Jeni Keisman, Cliff Hupp
WILEY INTERDISCIPLINARY REVIEWS-WATER
(2020)
Article
Environmental Sciences
Peter J. A. Kleinman, Rosemary M. Fanelli, Robert M. Hirsch, Anthony R. Buda, Zachary M. Easton, Lisa A. Wainger, Chris Brosch, Martin Lowenfish, Amy S. Collick, Adel Shirmohammadi, Kathy Boomer, Jason A. Hubbart, Ray B. Bryant, Gary W. Shenk
JOURNAL OF ENVIRONMENTAL QUALITY
(2019)
Article
Engineering, Civil
CF Cerco, L Linker, J Sweeney, G Shenk, AJ Butt
JOURNAL OF WATER RESOURCES PLANNING AND MANAGEMENT
(2002)
Article
Engineering, Environmental
P Wang, R Batiuk, L Linker, G Shenk
WATER SCIENCE AND TECHNOLOGY
(2001)