Publications about Chesapeake Bay

IAN is committed to producing practical, user-centered communications that foster a better understanding of science and enable readers to pursue new opportunities in research, education, and environmental problem-solving. Our publications synthesize scientific findings using effective science communication techniques.

2016 Chesapeake Bay Report Card (Page 1)

2016 Chesapeake Bay Report Card

Caroline Donovan, Alexandra Fries, Dylan Taillie, Bill Dennison ·
8 May 2017

This report card provides a transparent, timely, and geographically detailed assessment of Chesapeake Bay. In 2016, the report card includes five water quality indicators and two biotic indicators. In 2016, the overall grade for Chesapeake Bay is a 54%, a C. This means the Bay is in moderate health. Long term trends of each reporting region health and a fisheries index are also presented. For further details, visit the Report Card Website.

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Tidal water quality indicator factsheets (Page 1)

Tidal water quality indicator factsheets

Caroline Donovan, Suzanne Webster, Alexandra Fries ·
18 April 2017

The Chesapeake Monitoring Cooperative (CMC), as part of the Indicator Effectiveness Matrix objective, produced 12 factsheets describing 14 tidal water quality indicators. These indicators are part of the CMC's tidal water quality Quality Assurance Project Plan and Method Manuals. The factsheets are intended for nontraditional and volunteer monitoring groups to include as part of their water quality monitoring programs as education materials for their volunteers.

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Improving riverine constituent concentration and flux estimation by accounting for antecedent discharge conditions (Page 1)

Improving riverine constituent concentration and flux estimation by accounting for antecedent discharge conditions

Zhang Q, Ball WP ·
2017

Regression-based approaches are often employed to estimate riverine constituent concentrations and fluxes based on typically sparse concentration observations. One such approach is the recently developed WRTDS (‘‘Weighted Regressions on Time, Discharge, and Season”) method, which has been shown to pro- vide more accurate estimates than prior approaches in a wide range of applications.

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Assessing water quality of the Chesapeake Bay by the impact of sea level rise and warming (Page 1)

Assessing water quality of the Chesapeake Bay by the impact of sea level rise and warming

Wang P,Linker L, Wang H, Bhatt G, Yactayo G, K Hinson K and Tian R ·
2017

The influence of sea level rise and warming on circulation and water quality of the Chesapeake Bay under projected climate conditions in 2050 were estimated by computer simulation. Four estuarine circulation scenarios in the estuary were run using the same watershed load in 1991-2000 period. They are, 1) the Base Scenario, which represents the current climate condition, 2) a Sea Level Rise Scenario, 3) a Warming Scenario, and 4) a combined Sea Level Rise and Warming Scenario.

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Multiple stressors threaten the imperiled coastal foundation species eelgrass (Zostera marina) in Chesapeake Bay, USA (Page 1)

Multiple stressors threaten the imperiled coastal foundation species eelgrass (Zostera marina) in Chesapeake Bay, USA

Lefcheck JS, Wilcox DJ, Murphy RR, Marion SR, and Orth RJ ·
2017

Interactions among global change stressors and their effects at large scales are often proposed, but seldom evaluated. This situation is primarily due to lack of comprehensive, sufficiently long-term, and spatially extensive datasets. Seagrasses, which provide nursery habitat, improve water quality, and constitute a globally important carbon sink, are among the most vulnerable habitats on the planet.

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An improved method for interpretation of riverine concentration-discharge relationships indicates long-term shifts in reservoir sediment trapping (Page 1)

An improved method for interpretation of riverine concentration-discharge relationships indicates long-term shifts in reservoir sediment trapping

Zhang Q, Harman CJ, and Ball WP ·
2016

Derived from river monitoring data, concentration-discharge (C-Q) relationships are powerful indicators of export dynamics. Proper interpretation of such relationships can be made complex, however, if the ln(C)-ln(Q) relationships are nonlinear or if the relationships change over time, season, or discharge. Methods of addressing these issues by “binning” data can introduce artifacts that obscure underlying interactions among time, discharge, and season.

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2015 Chesapeake Bay Report Card (Page 1)

2015 Chesapeake Bay Report Card

Caroline Donovan, Alexandra Fries, Bill Dennison ·
17 May 2016

This report card provides a transparent, timely, and geographically detailed assessment of Chesapeake Bay. In 2015, the report card includes five water quality indicators and two biotic indicators. In 2015, the overall grade for Chesapeake Bay is a 53%, a C. This means the Bay is in moderate health. Long term trends of each reporting region health and a fisheries index are also presented. For further details, visit the Report Card website.

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Decadal-scale export of nitrogen, phosphorus, and sediment from the Susquehanna River basin, USA: Analysis and synthesis of temporal and spatial patterns (Page 1)

Decadal-scale export of nitrogen, phosphorus, and sediment from the Susquehanna River basin, USA: Analysis and synthesis of temporal and spatial patterns

Zhang Q, Ball WP, and Moyer DL ·
2016

The export of nitrogen (N), phosphorus (P), and suspended sediment (SS) is a long-standing management con- cern for the Chesapeake Bay watershed, USA. Here we present a comprehensive evaluation of nutrient and sed- iment loads over the last three decades at multiple locations in the Susquehanna River basin (SRB), Chesapeake's largest tributary watershed.

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Effects of cross-channel bathymetry and wind direction on destratification and hypoxia reduction in the Chesapeake Bay (Page 1)

Effects of cross-channel bathymetry and wind direction on destratification and hypoxia reduction in the Chesapeake Bay

Wang P, Wang H, Linker L, and Tian R ·
2016

A coupled estuarine hydrodynamic model and water quality model were used to analyze differences in destratification and anoxia/hypoxia reduction by wind directions in the north-south oriented Chesapeake estuary, USA. The predominant cross-channel bathymetry in the Bay's anoxic center is asymmetric with a steeper and narrower shoal on the eastern shore than on the western shore, which modifies wind-induced circulation differently for two opposite wind directions.

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