Integrating monitoring and modeling information to develop an indicator of watershed progress toward nutrient reduction goals

Zhang, Qian; Shenk, Gary W.; Bhatt, Gopal; Bertani, Isabella

doi:10.1016/j.ecolind.2023.111357

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Cited by 4 publications

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Enhancing pollution management in watersheds: A critical review of total maximum daily load (TMDL) implementation

Wang,

Guan,

et al. 2025

Environmental Research

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Enhancing pollution management in watersheds: A critical review of total maximum daily load (TMDL) implementation

Wang,

Guan,

et al. 2025

Environmental Research

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Dissolved oxygen criteria attainment in Chesapeake Bay: Where has it improved since 1985?

Zhang,

Murphy,

Tian

et al. 2024

Science of The Total Environment

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Geography, Trajectories, and Controls of Coastal Water Quality: More Rapid Improvement in the Shallow Zone of the Chesapeake Bay

Zhang,

Murphy,

Tian

et al. 2024

Environ. Sci. Technol.

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Many coastal ecosystems have suffered from cultural eutrophication and dead zones. In the Chesapeake Bay, water quality degradation is manifested in low dissolved oxygen, poor water clarity, and decreased submerged aquatic vegetation acreage. This research combines long-term monitoring data, science-based assessment methods, and novel data analysis approaches (i.e., machine learning) toward understanding the geography, trajectories, and controls of water quality in the Chesapeake Bay, which provides an example for the assessment and management of complex coastal ecosystems. Results showed that the attainment of water quality standards has improved in both the deep zone and the shallow zone since 1985, but the shallow zone has improved more rapidly. In addition, the attainment trajectory has been affected by mainly external drivers (i.e., nutrient reductions) and, to a lesser extent, internal drivers (i.e., water temperature and stratification). Reductions in nutrient loads would improve attainment, whereas warming and stratification would decrease attainment. Furthermore, scenario analyses demonstrated the importance of managing both nitrogen and phosphorus loads. Overall, the deep zone and the shallow zone showed different trajectories and controls, emphasizing the importance of geographical targeting with management actions.

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Integrating monitoring and modeling information to develop an indicator of watershed progress toward nutrient reduction goals

Cited by 4 publications

References 46 publications

Enhancing pollution management in watersheds: A critical review of total maximum daily load (TMDL) implementation

Enhancing pollution management in watersheds: A critical review of total maximum daily load (TMDL) implementation

Dissolved oxygen criteria attainment in Chesapeake Bay: Where has it improved since 1985?

Geography, Trajectories, and Controls of Coastal Water Quality: More Rapid Improvement in the Shallow Zone of the Chesapeake Bay

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