Professor, University of Maryland - College Park
Earth System Science Interdisciplinary Center & Geology
The ecology and biogeochemistry of watersheds and aquatic ecosystems, primarily through long-term studies in the Chesapeake Bay region.
University of Maryland - College Park
Research Focus: Freshwater salinization has been shown to affect much of temperate North America and Europe. Positive trends in freshwater specific conductance, base cations and pH have been observed in datasets spanning the past 50 years. However, little is known about the effects of salinization at smaller temporal timescales. Preliminary results indicate that salinization induces both base cation exchange and increased metal mobility during and after winter precipitation events. Salts may also be accumulating in groundwater and soils surrounding road networks, never being fully flushed out of the system during the summer and fall.
Dr. Shuiwang Duan
University of Maryland - College Park Research Associate
Research Focus: I am studying organic matter sources and composition, and how they affect nutrients, organic contaminants, and heavy metals in aquatic environments. I am investigating the effects of climate change and watershed landuse on water quality of streams, and using Soil and Water Assessment Tool (SWAT) to predict future changes in nutrient and carbon inputs from land to the coastal ocean. I am also interested in hydrological model developments for tracking sources and in-stream processing of organic matter and nutrients.
Alumni and Past Personnel
Former Graduate Students
Ph.D. Geology 2018: "Effects of Salinization on Base Cation, Nutrient, Carbon, and Trace Metal Biogeochemistry in Human-Impacted Rivers in the Eastern US"
Currently: RMS Consulting, San Francisco, CA
Ph.D. Geology 2017: "Hydrological, Biological, and Geochemical Relationships among Carbon, Nitrogen, and Base Cations in Restored and Unrestored Urban Streams"
Currently: USGS, Reston, Va
Ph.D. Geology 2016: "Dissolved and
Gaseous Fluxes of Carbon and Nitrogen from Urban Watersheds of the Chesapeake Bay"
Currently: Research Assistant Professor, Biology at the University of Utah
Ph.D. MEES 2016: "Sources and Transformations of Nitrogen and Carbon in Urban Watersheds"
Currently: Princeton University, NJ; U.S. EPA
Ph.D. MEES 2015: “Nitrogen Uptake and Denitrification in Restored and Degraded-Urban Streams: Impacts of Organic Carbon and Integrated Stormwater Management”
Currently: Ecologist with US Environmental Protection Agency’s Office of Research and Development in Cincinnati, OH.
M.S. MEES 2009: "Longitudinal Patterns in Streamwater Chemistry and Carbon and Nitrogen Mass Balances in Restored and Degraded Stream Networks."
Currently: AKRF Environmental Consulting, MD
M.S. MEES 2009: "Organic Nitrogen and Carbon Transformations in a Stream Network of Chesapeake Bay Watershed."
Currently: US Forest Service, OR
M.S. MEES 2007: "Whole Stream Nitrogen Uptake and Denitrification in a Restored Stream of the Chesapeake Bay."
Currently: Cornell University Cooperative Education, NY
Ph.D. MEES 2007: "Effects of Annual and Perennial Community Dynamics on Tidal Freshwater Marsh Ecosystem Functioning." (co-advised)
Currently: Associate Professor, Northern Kentucky University; Director, Environmental Science Program
Former Research Assistants
Ashley Sides Raley
UMD Graduate School
UMD Graduate School, RMS Consulting, San Francisco, CA
Pennsylvania Dept. of Environment, PA
Nature Conservancy, NJ, New Jersey Department of Environmental Protection
USGS, Portland, OR
AKRF Environmental Consulting, MD
Resource Management Concepts Inc.
UMCES Chesapeake Biological Lab, MD
Former Research Associates
University of Maryland, MD
Former Visiting Scientists
U.S. EPA, PA
East China Normal University, China
Xiamen University, China
University of Sydney, Australia
Former Undergraduate Collaborators and Senior Thesis Students
Stanford University Grad School
MTI Engineering and Testing, Vienna VA
Cornell University Grad School, NY
UDel Grad School, New England Interstate Water Pollution Control Commission
UMD Graduate School, RMS Consulting
UMD Grad School, USGS, Reston
New England Interstate Water Pollution Control Commission, CT
AECOM Consulting, MD, University of Florida graduate school
University of Puerto Rico, PR
Harold Manrique Hernandez
Rice University, TX, Brown and Caldwell Consulting, TX
Environmental Alliance, MD; Kleinfelder Consulting, MD
Carnegie Mellon Grad School, PA; AMT Engineering, MD