Hydrologist & Sediment Team Lead
The U.S. Geological Survey
United States Virgin Islands
My research interests are diverse and include 1) using chemical and statistical techniques to understand migration patterns, habitat selection, and physiological responses of fish, 2) relating changes in water levels, streamflow, and water quality on aquatic ecosystem function, 3) fate and transport of sediment in the environment, 4) determination and application of streamflow statistics, and 5) use of hydroacoustic equipment in surface-water studies. Previously, I was a crew leader for the National Rivers and Streams Assessment (NRSA), a nationwide stream health assessment effort led by the USEPA. Currently, I am a crew leader for a NAWQA trends ecological site, and I am a member of the St. Croix Basin Water Resources Planning Team. I also am actively involved in the Rainy River/Lake of the Woods and Red River Basins. Recently, I have been involved in a USGS effort to coordinate USGS activities in the Mississippi River Basin and align USGS science priorities in the Mississippi River Basin with the needs and priorities of several partner agencies. Partner agencies on my active projects include Minnesota Pollution Control Agency, Minnesota Department of Natural Resources, International Joint Commission, National Park Service, USGS Upper Midwest Environmental Sciences Center, Missouri Department of Conservation, South Dakota State University, U.S. Army Corps of Engineers, Northern Arizona University, the USGS Grand Canyon Monitoring and Research Center, and the Legislative-Citizen Commission on Minnesota Resources.
hydrodynamics hydrology streamflow aquatic ecosystems ecological processes
Ziegeweid, J.R., Silliker, R.J., and Densmore, B.K., Network global navigation satellite system surveys of vertical reference marks to improve accuracy of collected water level data in Rainy Lake and the Namakan Reservoir System, Minnesota, United States, and Ontario, Canada: Joint Report to the International Joint Commission, 35 p.
Ziegeweid, J.R., Silliker, R.J., Densmore, B.K., and Krahulik, Justin, 2016, Network Global Navigation Satellite System survey to harmonize water-surface elevation data for the Rainy River Basin: U.S. Geological Survey Scientific Investigations Report 2016–5109, 20 p.
Smith, E.A., Kiesling, R.L., and Ziegeweid, J.R., 2017, Water-quality models to assess algal community dynamics, water quality, and fish habitat suitability for two agricultural land-use dominated lakes in Minnesota, 2014: U.S. Geological Survey Scientific Investigations Report 2017–5056, 65 p