Journal Articles

(32) Webber, J. S., J. Chanat, J. Clune, O. Devereux, N. Hall, R. D. Sabo, and Q. Zhang, 2024. “Evaluating water-quality trends in agricultural watersheds prioritized for management-practice implementation,” Journal of the American Water Resources Association, 60: 305-330, doi: 10.1111/1752-1688.13197. (PDF attached)

(31) Zhang, Q., G. Shenk, I. Bertani, and G. Bhatt, 2024. “Integrating monitoring and modeling information to develop an indicator of watershed progress toward nutrient reduction goals,” Ecological Indicators, 158: 111357, doi: 10.1016/j.ecolind.2023.111357. (PDF attached)

(30) Cravotta, C. A., T. L. Tasker, P. M. Smyntek, J. D. Blomquist, J. W. Clune, Q. Zhang, N. M. Schmadel, and N. K. Schmer, 2024. “Legacy sediment as a potential source of orthophosphate: Preliminary conceptual and geochemical models for the Susquehanna River, Chesapeake Bay watershed, USA,” Science of the Total Environment, 912:169361, doi: 10.1016/j.scitotenv.2023.169361. (PDF attached)

(29) Zhang, Q., J.T. Bostic, and R.D. Sabo, 2024. “Effects of point and nonpoint source controls on total phosphorus load trends across the Chesapeake Bay watershed,” Environmental Research Letters, 19:014012, doi: 10.1088/1748-9326/ad0d3c. (PDF attached)

(28) Zhang, Q., J. D. Blomquist, R. M. Fanelli, J. L. D. Keisman, D. L. Moyer, and M. J. Langland, 2023. “Progress in reducing nutrient and sediment loads to Chesapeake Bay: Three decades of monitoring data and implications for restoring complex ecosystems,” WIREs Water, 10(5): e1671, doi: 10.1002/wat2.1671. (PDF attached) 

(27) Xiang, J., T. Cui, X. Li, Q. Zhang, B. Mu, R. Liu, and W. Zhao, 2023. “Evaluating the effectiveness of coastal environmental management policies in China: The case of Bohai Sea,” Journal of Environmental Management, 338: 117812, doi: 10.1016/j.jenvman.2023.117812.

(26) Zhang, Q., T. R. Fisher, C. Buchanan, A. B. Gustafson, R. R. Karrh, R. R. Murphy, J. M. Testa, R. Tian, and P. J. Tango, 2022. “Nutrient limitation of phytoplankton in three tributaries of Chesapeake Bay: Detecting responses following nutrient reductions”, Water Research, 226: 119099, doi: 10.1016/j.watres.2022.119099. (PDF attached) 

(25) Zahran, A.R., Q. Zhang, P. Tango, and E.P. Smith, 2022. “A water quality barometer for Chesapeake Bay: Assessing spatial and temporal patterns using long-term monitoring data,” Ecological Indicators, 140:109022, doi: 10.1016/j.ecolind.2022.109022. (PDF attached)

(24) Zhang, Q., J.T. Bostic and R.D. Sabo, 2022. “Regional patterns and drivers of total nitrogen trends in the Chesapeake Bay watershed: Insights from machine learning approaches and management implications”, Water Research, 218:118443, doi: 10.1016/j.watres.2022.118443. 

(23) Sabo, R. D., B. Sullivan, C. Wu, E. Trentacoste, Q. Zhang, G. Shenk, G. Bhatt and L.C. Linker, 2022. “Major point and nonpoint sources of nutrient pollution to surface water have declined throughout the Chesapeake Bay watershed”, Environmental Research Communications, 4:045012, doi: 10.1088/2515-7620/ac5db6. (PDF attached) 

(22) Murphy, R.R., J. Keisman, J. Harcum, R.R. Karrh, M. Lane, E.S. Perry, and Q. Zhang, 2022. “Nutrient improvements in Chesapeake Bay: Direct effect of load reductions and implications for coastal management”, Environmental Science & Technology, 56(1):260-270, doi: 10.1021/acs.est.1c05388. (PDF attached) 

(21) Langendorf, R., V. Lyubchich, J. Testa, and Q. Zhang, 2021. “Inferring controls of dissolved oxygen criterion attainment in the Chesapeake Bay”, ACS ES&T Water, 1: 1665–1675, doi: 10.1021/acsestwater.0c00307. (PDF available upon request)

(20) Chang, S.Y., Q. Zhang, D.K. Byrnes, N.B. Basu, and K.J. Van Meter, 2021. “Chesapeake legacies: The importance of legacy nitrogen to improving Chesapeake Bay water quality”, Environmental Research Letters, 16: 085002, doi: 10.1088/1748-9326/ac0d7b. (PDF attached) 

(19) Preisendanz, H.E., T.L. Veith, Q. Zhang, and J. Shortle, 2021. “Temporal inequality of nutrient and sediment transport: a decision-making framework for temporal targeting of load reduction goals”, Environmental Research Letters, 16: 014005, doi: 10.1088/1748-9326/abc997. (PDF attached) 

(18) Zhang, Q., J. S. Webber, D. L. Moyer, and J. G. Chanat, 2021. “An approach for decomposing river water-quality trends into different flow classes”, Science of the Total Environment, 755: 143562, doi: 10.1016/j.scitotenv.2020.143562. (PDF attached) 

(17) Zhang, Q., T. R. Fisher, E. M. Trentacoste, C. Buchanan, A. B. Gustafson, R. Karrh, R. R. Murphy, J. Keisman, C. Wu, R. Tian, J. M. Testa, and P. J. Tango, 2021. “Nutrient limitation of phytoplankton in Chesapeake Bay: Development of an empirical approach for water-quality management”, Water Research, 188C: 116407, doi: 10.1016/j.watres.2020.116407. (PDF attached) 

(16) Noe, G.B., M.J. Cashman, K. Skalak, A. Gellis, K.G. Hopkins, D. Moyer, J. Webber, A. Benthem, K. Maloney, J. Brakebill, A. Sekellick, M. Langland, Q. Zhang, G. Shenk, J. Keisman, and C. Hupp, 2020.“Sediment dynamics and implications for management: State of the science from long‐term research in the Chesapeake Bay watershed, USA”, WIREs Water, 7: e1454, doi: 10.1002/wat2.1454. (PDF attached) 

(15) Roubeix V., C. Minaudo, J. Prats, N. Reynaud, Q. Zhang, F. Moatar, and P. Danis, 2020. “Adapting the dynamic LakeMab model to simulate seasonal variations of phosphorus concentration in reservoirs: a case study of Lake Bultière (France)”, Limnology, 21: 233-244, doi: 10.1007/s10201-019-00606-x. (PDF available upon request)

(14) Zhang, Q., and R.M. Hirsch, 2019. “River water‐quality concentration and flux estimation can be improved by accounting for serial correlation through an autoregressive model”, Water Resources Research, 55: 9705–9723, doi: 10.1029/2019WR025338. (PDF attached)

(13) Testa, J.M., Lyubchich V., and Q. Zhang, 2019. “Patterns and trends in Secchi disk depth over three decades in the Chesapeake Bay estuarine complex”, Estuaries and Coasts, 42(4): 927-943, doi: 10.1007/s12237-019-00547-9. (PDF available upon request)

(12) Zhang, Q., J.D. Blomquist, D.L. Moyer, and J.G. Chanat, 2019. “Estimation bias in water-quality constituent concentrations and fluxes: A synthesis for Chesapeake Bay rivers and streams”, Frontiers in Ecology and Evolution, 7: 109, doi: 10.3389/fevo.2019.00109. (PDF attached) 

(11) Zhang, Q., P.J. Tango, R.R. Murphy, M.K. Forsyth, R. Tian, J. Keisman, and E.M. Trentacoste, 2018. “Chesapeake Bay dissolved oxygen criterion attainment deficit: Three decades of temporal and spatial patterns”, Frontiers in Marine Science, 5: 422, doi: 10.3389/fmars.2018.00422. (PDF attached) 

(10) Zhang, Q., R.R. Murphy, R. Tian, M.K. Forsyth, E.M. Trentacoste, J. Keisman, and P.J. Tango, 2018. “Chesapeake Bay's water quality condition has been recovering: Insights from a multimetric indicator assessment of thirty years of tidal monitoring data”, Science of the Total Environment, 637-638: 1617-1625, doi: 10.1016/j.scitotenv.2018.05.025. (PDF available upon request)

(9) Zhang, Q., C.J. Harman, and J.W. Kirchner, 2018. “Evaluation of statistical methods for quantifying fractal scaling in water quality time series with irregular sampling”, Hydrology and Earth System Sciences, 22: 1175-1192, doi: 10.5194/hess-22-1175-2018. (PDF attached) 

(8) Zhang, Q. and J.D. Blomquist, 2018. “Watershed export of fine sediment, organic carbon, and chlorophyll-a to Chesapeake Bay: Spatial and temporal patterns in 1984–2016”, Science of the Total Environment, 619–620: 1066–1078, doi: 10.1016/j.scitotenv.2017.10.279. (PDF attached) 

(7) Zhang, Q., 2018. “Synthesis of nutrient and sediment export patterns in the Chesapeake Bay watershed: Complex and non-stationary concentration-discharge relationships”, Science of the Total Environment, 618: 1268-1283, doi: 10.1016/j.scitotenv.2017.09.221. (PDF available upon request)

(6) Zhang, Q. and W.P. Ball, 2017. “Improving Riverine Constituent Concentration and Flux Estimation by Accounting for Antecedent Discharge Conditions”, Journal of Hydrology, 547: 387–402, doi: 10.1016/j.jhydrol.2016.12.052. (PDF available upon request)

(5) Zhang, Q., C.J. Harman, and W.P. Ball, 2016. “An Improved Method for Interpretation of Riverine Concentration-Discharge Relationships Indicates Long-Term Shifts in Reservoir Sediment Trapping”, Geophysical Research Letters, 43: 10215–10224, doi: 10.1002/2016GL069945. (PDF available upon request)

(4) Zhang, Q., W.P. Ball, and D.L. Moyer, 2016. “Decadal-scale Export of Nitrogen, Phosphorus, and Sediment from the Susquehanna River Basin, USA: Analysis and Synthesis of Temporal and Spatial Patterns”, Science of the Total Environment, 563–564: 1016–1029, doi: 10.1016/j.scitotenv.2016.03.104. (PDF attached) 

(3) Zhang, Q., R.M. Hirsch, and W.P. Ball, 2016. “Long-Term Changes in Sediment and Nutrient Delivery from Conowingo Dam to Chesapeake Bay: Effects of Reservoir Sedimentation”, Environmental Science & Technology, 50(4): 1877–1886, doi: 10.1021/acs.est.5b04073. (PDF available upon request)

(2) Zhang, Q., D.C. Brady, W.R. Boynton, and W.P. Ball, 2015. “Long-Term Trends of Nutrients and Sediment from the Nontidal Chesapeake Watershed: An Assessment of Progress by River and Season”, Journal of the American Water Resources Association, 51(6): 1534–1555, doi: 10.1111/1752-1688.12327. (PDF available upon request)

(1) Zhang, Q., D.C. Brady, and W.P. Ball, 2013. “Long-term Seasonal Trends of Nitrogen, Phosphorus, and Suspended Sediment Load from the Non-tidal Susquehanna River Basin to Chesapeake Bay”, Science of the Total Environment, 452–453: 208–221, doi: 10.1016/j.scitotenv.2013.02.012. (PDF available upon request)

Book Chapter

(1) Zhang, Q., S. Cozzi, C. Palinkas, and M. Giani, 2020. “Recent Status and Long‐Term Trends in Freshwater Discharge and Nutrient Inputs”, In: Coastal Ecosystems in Transition: A Comparative Analysis of the Northern Adriatic and Chesapeake Bay, T. C. Malone, A. Malej and J. Faganeli (Editors), doi: 10.1002/9781119543626.ch2. American Geophysical Union / John Wiley and Sons, Inc. 

Reports

(7) Sullivan, B., K. Gootman, A. Gunnerson, C. Johnson, C. Mason, E. Perry, G. Bhatt, J. Keisman, J. Webber, J. Harcum, M. Lane, O. Devereux, Q. Zhang, R. Murphy, R. Karrh, T. Butler, V. Van Note, and Z. Wei, 2023. “James Tributary Summary: A summary of trends in tidal water quality and associated factors, 1985-2021,” Chesapeake Bay Program, Annapolis, MD. (PDF attached) 

(6) Webber, J.S., J.W. Clune, A.M. Soroka, M.J. Cashman, O.H. Devereux, R.M. Fanelli, K.E. Faunce, K.G. Hopkins, J.L. Keisman, R.E. Langendorf, C.A. Mason, R.R. Murphy, M.R. Nardi, R.D. Sabo, G.W. Shenk, P.J. Tango, J.M. Testa, and Q. Zhang, 2022. “Summarizing Scientific Findings for Common Stakeholder Questions to Inform Nutrient and Sediment Management Activities in the Chesapeake Bay Watershed”, https://www.usgs.gov/centers/chesapeake-bay-activities/science/summarizing-scientific-findings-common-stakeholder. 

(5) Clune, J. W., P. D. Capel, M. P. Miller, D. A. Burns, A. J. Sekellick, P. R. Claggett, R. H. Coupe, R. M. Fanelli, A. M. Garcia, J. P. Raffensperger, S. Terziotti, G. Bhatt, J. D. Blomquist, K. G. Hopkins, J. L. Keisman, L. C. Linker, G. W. Shenk, R. A. Smith, A. M. Soroka, J. S. Webber, D. M. Wolock and Q. Zhang, 2021. Nitrogen in the Chesapeake Bay watershed—A century of change, 1950–2050, U.S. Geological Survey Circular 1486. U.S. Geological Survey, New Cumberland, PA, doi: 10.3133/cir1486. (PDF attached) 

(4) Bastille, K., S. Hardison, S. Lucey, C. Schillaci, J. Walden, P. Fratantoni, J. Caracappa, G. DePiper, B. Vogt, C. Pellerin, R. Vogel, Q. Zhang, K. Hyde, Z. Chen, L. Colburn, C. Weng, S. Gaichas, L. Smith, A. Beet, R. Gamble, V. Saba, M. Wuenschel, G. Roskar, C. Orphanides, G. Saba, H. Walsh, K. Friedland, T. White, G. Shield, A. Gangopadhyay, A. Silva, D. Lyons and R. Morse, 2021. Technical Documentation, State of the Ecosystem 2021. Northeast Fisheries Science Center. https://repository.library.noaa.gov/view/noaa/29277.

(3) Hyer, K. E., S. W. Phillips, S. W. Ator, D. L. Moyer, J. S. Webber, R. Felver, J. L. Keisman, L. A. McDonnell, R. Murphy, E. M. Trentacoste, Q. Zhang, W. C. Dennison, S. Swanson, B. Walsh, J. Hawkey, and D. Taillie, 2021. “Nutrient trends and drivers in the Chesapeake Bay Watershed”, U.S. Geological Survey Fact Sheet 2020–3069. U.S. Geological Survey, Baltimore, MD, p. 4. doi: 10.3133/fs20203069. (PDF attached) 

(2) Keisman, J., R. R. Murphy, O. H. Devereux, J. Harcum, R. Karrh, M. Lane, E. Perry, J. Webber, Z. Wei, Q. Zhang, and M. Petenbrink, 2020. “Potomac Tributary Report: A summary of trends in tidal water quality and associated factors, 1985-2018”, Chesapeake Bay Program, Annapolis, MD. https://pubs.er.usgs.gov/publication/70216971.

(1) Keisman, J., C. Friedrichs, R. Batiuk, J. Blomquist, J. Cornwell, C. Gallegos, S. Lyubchich, K. Moore, R. Murphy, R. Orth, L. Sanford, P. Tango, J. Testa, M. Trice, and Q. Zhang, 2019. “Understanding and explaining 30 years of water clarity trends in the Chesapeake Bay’s tidal waters”, Chesapeake Bay Program STAC Publication Number 19-004, Edgewater, MD, p. 25. http://www.chesapeake.org/pubs/411_Keisman2019.pdf.

Dissertation

(1) Zhang, Q. 2016. Quantifying Nutrient and Sediment Export from the Chesapeake Bay Watershed: Retrospective Analyses and Method Improvements. Johns Hopkins University Doctoral Dissertations, Baltimore, MD. https://jscholarship.library.jhu.edu/handle/1774.2/40327. (PDF attached) 

Data Publications

(7) Zhang, Q. 2022. Data for: Nutrient limitation of phytoplankton in three tributaries of Chesapeake Bay: Detecting responses following nutrient reductions. Version 2. Mendeley Data, doi: 10.17632/bzzthwgpdj.2.

(6) Webber, J.S, and Q. Zhang. 2020. Chesapeake Bay Nontidal Network 1985-2018: Daily High-Flow and Low-Flow Concentration and Load Estimates (ver. 1.1, November 2021). U.S. Geological Survey data release, doi: 10.5066/P9LBJEY1.

(5) Zhang, Q. 2020. Data for: Nutrient limitation of phytoplankton in Chesapeake Bay: Development of an empirical approach for water-quality management. Version 3. Mendeley Data, doi: 10.17632/8wt3wh2mwr.3.

(4) Zhang, Q., C.J. Harman, and W.P. Ball. 2016. Data associated with An Improved Method for Interpretation of Riverine Concentration-Discharge Relationships Indicates Long-Term Shifts in Reservoir Sediment Trapping. Version 1. Johns Hopkins University Data Archive, doi: 10.7281/T18G8HM0.

(3) Zhang, Q. and W.P. Ball. 2016. Data associated with Decadal-scale export of nitrogen, phosphorus, and sediment from the Susquehanna River basin, USA: Analysis and synthesis of temporal and spatial patterns. Version 1. Johns Hopkins University Data Archive, doi: 10.7281/T1QN64NW.

(2) Zhang, Q. and W.P. Ball. 2014. Data associated with long-term seasonal trends of nutrients and sediment from the non-tidal Chesapeake Bay Watershed. Version 1. Johns Hopkins University Data Archive, doi: 10.7281/T1VD6WC7.

(1) Zhang, Q. and W.P. Ball. 2014. Data associated with Long-term seasonal trends of nitrogen, phosphorus, and suspended sediment load from the non-tidal Susquehanna River Basin to Chesapeake Bay. Version 1. Johns Hopkins University Data Archive, dx.doi.org/10.7281/T1KW5CX5.

App Products

(3) Chesapeake Bay TMDL Indicator (Non-Tidal Network Stations)

(2) Chesapeake Bay Water Quality Standards Attainment Deficit (1985-2021)

(1) Chesapeake Bay Water Quality Standards Attainment Indicator (1985-2021)