Projects for Qian Zhang

Nutrient Trends in the Nontidal Chesapeake Bay Watershed

2020-01-01 —

The objective of this project is to develop an extension of the flow-normalization (FN) procedure of the WRTDS (“Weighted Regressions on Time, Discharge, and Season”) method. This extension is being applied to the Chesapeake Bay Nontidal Monitoring Network to quantify water-quality trends under different flow conditions and to guide the direction of additional analysis for capturing the underlying drivers, which can inform management strategies toward improving water quality.

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Chesapeake Bay Tributary Summaries

2018-01-01 —

The Chesapeake Bay Program and the U.S. Geologic Survey are compiling tributary basin summaries for 12 major tributaries or tributary groups in the Chesapeake Bay Watershed. These summaries summarize the following information: (1) How tidal water quality changes over time; (2) How factors that drive those changes change over time; and (3) Current state of the science on connecting change in aquatic conditions to its drivers.

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Nutrient Limitation in Chesapeake Bay and its Tributaries

2018-01-01 —

This project is aimed toward better understanding nutrient limitation of phytoplankton in Chesapeake Bay and its tidal tributaries. Leveraging novel statistical approaches and long-term monitoring data sets from the Chesapeake Bay Program Partnership, this project helps understand whether nutrient limitation patterns have changed in response to decades of nutrient reduction efforts.

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