Cross Media Inputs to Eastern US Watersheds and Their Significance to Estuarine Water Quality

1992 ◽  
Vol 26 (12) ◽  
pp. 2675-2683 ◽  
Author(s):  
D. L. Correll ◽  
T. E. Jordan ◽  
D. E. Weller
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Atmospheric Deposition ◽  
Ground Water ◽  
Chesapeake Bay ◽  
Drainage Basin ◽  
Point Sources ◽  
Estuarine Water ◽  
Buffer Zones ◽  
Estuarine Water Quality

Extensive research on Chesapeake Bay estuary, its drainage basin, and its airshed have now demonstrated that atmospheric deposition and diffuse land discharges are the largest sources for many parameters affecting estuarine water quality. For example, phosphorus and sediments are transported to the Bay largely in overland storm flows, nitrate largely in atmospheric deposition and in ground water, many pesticides and other toxic materials in surface waters and atmospheric deposition, and silicate primarily in ground water. Concerns over point sources such as sewage treatment outfalls and industrial outfalls have led to greatly improved treatment methods, alleviating the relative magnitude of these sources. The realization of the magnitude and importance of diffuse sources has led to research on improved land use practices, including better patterns of land use in the Chesapeake Bay landscape. One example is the use of and improved management of forested riparian buffer zones in the coastal plain part of the drainage basin.

scholarly journals Challenges in Quantifying Air‐Water Carbon Dioxide Flux Using Estuarine Water Quality Data: Case Study for Chesapeake Bay

2020 ◽  
Vol 125 (7) ◽  
Author(s):  
Maria Herrmann ◽  
Raymond G. Najjar ◽  
Fei Da ◽  
Jaclyn R. Friedman ◽  
Marjorie A. M. Friedrichs ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Water Quality ◽  
Chesapeake Bay ◽  
Carbon Dioxide Flux ◽  
Quality Data ◽  
Estuarine Water ◽  
Water Quality Data ◽  
Estuarine Water Quality

scholarly journals Localized Water Quality Improvement in the Choptank Estuary, a Tributary of Chesapeake Bay

2021 ◽  
Author(s):  
Thomas R. Fisher ◽  
Rebecca J. Fox ◽  
Anne B. Gustafson ◽  
Erika Koontz ◽  
Michelle Lepori-Bui ◽  
...  
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Atmospheric Deposition ◽  
Chesapeake Bay ◽  
Agricultural Sector ◽  
Wastewater Treatment Plants ◽  
Nutrient Budget ◽  
Point Sources ◽  
Diffuse Sources ◽  
The Usa

AbstractChesapeake Bay has a long history of nutrient pollution resulting in degraded water quality. However, we report improvements in chlorophyll a in surface waters and dissolved oxygen in bottom waters at one of three estuarine stations in the Choptank tributary of Chesapeake Bay. We updated a previous nutrient budget for the estuary constructed for reference year 1998 using rates of atmospheric deposition, inputs of watershed diffuse sources (primarily agriculture), and discharges of point sources (primarily human waste) for reference year 2017. Parallel trends suggest that improvements in water quality at the one station were likely due to 20% reductions in direct atmospheric deposition on the estuary’s surface and 78–95% reductions in wastewater N and P due to installation of tertiary treatment. The agricultural sector, the dominant source of N and P, appeared to provide little contribution to improved water quality during this period. Although efforts to reduce nutrient losses from agriculture are common throughout the Choptank basin, widespread reductions from agricultural diffuse sources could make large contributions to improved water quality at all stations in the estuary. The response in the Choptank is similar to those observed elsewhere in the USA, Europe, Australia, and New Zealand due to improved wastewater treatment. Similar to our findings, the upper Potomac River of Chesapeake Bay saw improvements driven by reductions in atmospheric deposition. Unfortunately, few studies elsewhere have shown improvements in water quality due to agricultural management. The data presented here indicate that public and industrial investments in reductions of atmospheric emissions and upgrades to wastewater treatment plants have improved estuarine water quality in the Choptank.

scholarly journals A cost-effectiveness analysis of water security and water quality: impacts of climate and land-use change on the River Thames system

2013 ◽  
Vol 371 (2002) ◽  
pp. 20120413 ◽  
Author(s):  
P. G. Whitehead ◽  
J. Crossman ◽  
B. B. Balana ◽  
M. N. Futter ◽  
S. Comber ◽  
...  
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Cost Effectiveness ◽  
Land Use Change ◽  
Algal Blooms ◽  
Economic Benefits ◽  
Point Sources ◽  
Mitigation Measures ◽  
Mitigation And Adaptation ◽  
River Thames

The catchment of the River Thames, the principal river system in southern England, provides the main water supply for London but is highly vulnerable to changes in climate, land use and population. The river is eutrophic with significant algal blooms with phosphorus assumed to be the primary chemical indicator of ecosystem health. In the Thames Basin, phosphorus is available from point sources such as wastewater treatment plants and from diffuse sources such as agriculture. In order to predict vulnerability to future change, the integrated catchments model for phosphorus (INCA-P) has been applied to the river basin and used to assess the cost-effectiveness of a range of mitigation and adaptation strategies. It is shown that scenarios of future climate and land-use change will exacerbate the water quality problems, but a range of mitigation measures can improve the situation. A cost-effectiveness study has been undertaken to compare the economic benefits of each mitigation measure and to assess the phosphorus reductions achieved. The most effective strategy is to reduce fertilizer use by 20% together with the treatment of effluent to a high standard. Such measures will reduce the instream phosphorus concentrations to close to the EU Water Framework Directive target for the Thames.

Cumulative impact of marinas on estuarine water quality

1996 ◽  
Vol 20 (3) ◽  
pp. 385-396 ◽  
Author(s):  
T. L. McAllister ◽  
M. F. Overton ◽  
E. D. Brill
Keyword(s):  
Water Quality ◽  
Estuarine Water ◽  
Cumulative Impact ◽  
Estuarine Water Quality

Large-Scale Estuarine Water Quality Matrix Model

1976 ◽  
Vol 102 (1) ◽  
pp. 191-209
Author(s):  
Bhaskara R. Penumalli ◽  
E. Gus Fruh ◽  
Robert H. Flake
Keyword(s):  
Water Quality ◽  
Matrix Model ◽  
Large Scale ◽  
Estuarine Water ◽  
Estuarine Water Quality
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