USGS Professional Pages
PublicationsRyberg, K.R., Akyüz, F.A., and Lin, W., 2015, Changes in total phosphorus concentration in the Red River of the North Basin, 1970-2012: American Society of Agricultural and Biological Engineers ASABE/CSBE North Central Intersectional Meeting, Fargo, N. Dak., April 10-11, 2015, paper number RRV15-054. [Link]
Ryberg, Karen R.; Lin, Wei; Vecchia, Aldo V., 2014. Impact of climate variability on runoff in the north-central United States. American Society of Civil Engineers , 11 p. [Link]
Ryberg, Karen R.; Vecchia, Aldo V.; Gilliom, Robert J.; Martin, Jeffrey D., 2014. Pesticide trends in major rivers of the United States, 1992-2010. U.S. Geological Survey Scientific Investigations Report 2014-5135, Report: vi, 63 p.; 2 Tables [Link]
Stone, Wesley W.; Gilliom, Robert J.; Ryberg, Karen R., 2014. Pesticides in U.S. streams and rivers: occurrence and trends during 1992-2011. Environmental Science & Technology American Chemical Society, 6 p. USGS news release http://www.usgs.gov/newsroom/article.asp?ID=3997. [Link]
Ryberg, Karen R.; Vecchia, Aldo V., 2013. seawaveQ: an R package providing a model and utilities for analyzing trends in chemical concentrations in streams with a seasonal wave (seawave) and adjustment for streamflow (Q) and other ancillary variables. U.S. Geological Survey Open-File Report 2013-1255, Report: iv, 13 p.; Downloads Directory [Link]
Peterson, T.C.; Heim, R.; Hirsch, R.M.; Kaiser, D.; Brooks, H.; Diffenbaugh, N.S.; Dole, R., Giovannettone, J.; Guiguis, K.; Karl, T.R.; Katz, R.W.; Kunkel, K.; Lettenmaier, D.; McCabe, G.J.; Paciorek, C.J.; Ryberg, K.R.; Schubert, S.; Silva, V.B.S.; Stewart, B.; Vecchia, A.V.; Villarini, G.; Vose, R.S.; Walsh, J.; Wolock, D.; Wolter, K.; Woodhouse, C.A.; Wehner, M.; and Wuebbles, D., 2013, Monitoring and understanding changes in heatwaves, coldwaves, floods and droughts in the United States: State of knowledge: Bulletin of the American Meteorological Society, v. 94, no. 6, 821-834. NOAA National Climatic Data Center news release http://www.ncdc.noaa.gov/news/changes-heat-waves-cold-waves-floods-and-droughts-united-states. [Link]
Hirsch, R. M.; Ryberg, K. R., 2012. Has the magnitude of floods across the USA changed with global CO 2 levels? Hydrological Sciences Journal, v. 57, no. 1, 1-9. USGS news release http://www.usgs.gov/newsroom/article.asp?ID=3006. [Link]
Ryberg, Karen R.; Vecchia, Aldo V., 2012. waterData--An R package for retrieval, analysis, and anomaly calculation of daily hydrologic time series data, version 1.0. U.S. Geological Survey Open-File Report 2012-1168, Report: iv, 8 p.; Appendixes 1-2 [Link]
Ryberg, Karen R.; Vecchia, Aldo V.; Martin, Jeffrey D.; Gilliom, Robert J., 2010. Trends in pesticide concentrations in urban streams in the United States, 1992-2008. U.S. Geological Survey Scientific Investigations Report 2010-5139, viii, ; 42 p.; Appendices; Appendix 5 TXT; Appendix 6 TXT [Link]
Ryberg, Karen R.; Emerson, Douglas G.; Macek-Rowland, Kathleen M., 2009. Solid Precipitation Measurement Intercomparison in Bismarck, North Dakota, from 1988 through 1997. U.S. Geological Survey Scientific Investigations Report 2009-5180, vi, 24 p. [Link]
Ryberg, Karen R.; Hiemenz, Gregory, 2009. Summary and Analysis of Water-Quality Data for the Arrowwood National Wildlife Refuge, East-Central North Dakota, 1987-2004. U.S. Geological Survey Scientific Investigations Report 2009-5017, Report: vi, 92 p.; Supplements (xls) [Link]
Ryberg, Karen R., 2008. PFReports: A Program for Systematic Checking of Annual Peaks in NWISWeb. Geological Survey (U.S.) Open-File Report 2008-1284, iv, 18 p. [Link]
Ryberg, Karen R., 2007. Continuous Water-Quality Monitoring and Regression Analysis to Estimate Constituent Concentrations and Loads in the Sheyenne River, North Dakota, 1980-2006. Geological Survey (U.S.) Scientific Investigations Report 2007-5153, v, 22 p. [Link]
Ryberg, Karen R., 2007. Summary and Trend Analysis of Water-Quality Data for the Oakes Test Area, Southeastern North Dakota, 1984-2004. Geological Survey (U.S.) Scientific Investigations Report 2007-5056, iv, 118 p. [Link]
Ryberg, K. R.; Macek-Rowland, K. M.; Wiche, G. J.; Klapprodt, L. A., 2007. 10th Anniversary of the 1997 Red River Flood. General Information Publication 49, 1 p. [Link]
Ryberg, Karen R.; Macek-Rowland, Kathleen M.; Banse, Tara A.; Wiche, Gregg J. Edited by Martin, Cathy R., 2007. A History of Flooding in the Red River Basin. Geological Survey (U.S.) General Information Publication 55, Poster: 40 x 30 inches [Link]
Ryberg, Karen R., 2006. Cluster analysis of water-quality data for Lake Sakakawea, Audubon Lake, and McClusky Canal, central North Dakota, 1990-2003. Scientific Investigations Report 2006-5202, 38 p. [Link]
Ryberg, Karen R.; Vecchia, Aldo V., 2006. Water-Quality Trend Analysis and Sampling Design for the Devils Lake Basin, North Dakota, January 1965 Through September 2003. Scientific Investigations Report 2006-5238, v, 64 p. [Link]
Ryberg, Karen R., 2006. Continuous Water-Quality Monitoring and Regression Analysis to Estimate Constituent Concentrations and Loads in the Red River of the North, Fargo, North Dakota, 2003-05. Scientific Investigations Report 2006-5241, v, 35 p. [Link]
Ryberg, Karen R.; Damschen, William C.; Vecchia, Aldo V., 2005. Graphical user interface for accessing water-quality data for the Devils Lake basin, North Dakota. Open-File Report 2005-1419, iii, 15 p. [Link]
Macek-Rowland, Kathleen M.; Arntson, Allan D.; Ryberg, Karen R.; Dahl, Ann L.; Lieb, Amy, 2004. Water-use data for the Red River of the North Basin, North Dakota, Minnesota, and South Dakota, 1979-2001. Open-File Report 2004-1308, 260 p. [Link]
My Science Topics
My USGS Science Strategy AreasA National Hazard, Risk, and Resilience Assessment Program
A Water Census of the United States
Climate Variability & Change
Karen Ryberg is a Statistician spending about half of her time on the National Water Quality Assessment Program's Surface-Water Trends Team, primarily working on trends in pesticide concentrations in surface water. The other half of her time is spent on a variety of issues including the impact of climate variability and change on streamflow and water quality in the North Central United States, outlier detection in large databases, and statistical support and training.
Selected Recent Presentations
Ryberg, K.R., Akyüz, F.A., Wiche, G.J., and Lin, W., 2015, Changes in seasonality and timing of peak streamflow in the north-central United States, 1910-2012, 2015 Western South Dakota Hydrology Meeting, April 15, 2015, Rapid City, S. Dak.
Ryberg, K.R., Vecchia, A.V., Akyüz, F.A., and Lin, W., April 11, 2015, Changes in total phosphorus in the Red River of the North, 1970-2012, 2015 ASABE North Central Intersectional Conference, April 10-11, 2015, Fargo, N. Dak.
Ryberg, K.R., Vecchia, A.V., Akyüz, F.A., and Lin, W., February 10, 2015, Tree-ring based estimates of long-term seasonal precipitation Souris River Region, Saskatchewan, North Dakota, and Manitoba, Water Mission Area Investigations Chiefs Meeting, February 10-12, 2015, Reston, Va.
Ryberg, K.R., June 24, 2014, Climate, Flooding, and the Souris River Basin, International Souris River Board Public Meeting, Minot, N. Dak.
Ryberg, K.R. and Vecchia, A.V., Plenary Speaker, March 5, 2014, Modeling pesticide concentrations in surface water, with special emphasis on results for the corn-belt region of the United States and the Missouri and Red River Basins, 2014 ND Water Quality Monitoring Conference, March 4-6, 2014, Bismarck, N. Dak.
Ryberg, K.R., October 18, 2012, Web site and social media usage during flooding—communicating science, US-Russia Bi-Presidential Commission Science and Technology Working Group Sub-Working Group on Climate Change and the Working Group on Emergency Situations Workshop on Flood Frequency and Flood Inundation Mapping, October 17–19, 2012, Hydrometeorological Center of Russia, Moscow, Russian Federation.
Ryberg, K.R., Lin, W., and Vecchia, A.V., October 15, 2012, Impact of climate variability on runoff in the North Central United States, US-Russia Bi-Presidential Commission Science and Technology Working Group Sub-Working Group on Climate Change and the Working Group on Emergency Situations Workshop on The Impact of Climate Variability on Streamflow in the United States and Russia, October 15–16, 2012, State Hydrologic Institute, St. Petersburg, Russian Federation.
821 E. Interstate Ave
Bismarck, ND 58503
701-250-7492 - Fax
Back to top