Stewart Rounds

Dr. Rounds joined the U.S. Geological Survey in 1992 and worked on a wide variety of studies, with a focus on water-quality monitoring and modeling of rivers and lakes around Oregon.  In 2020, Stewart retired and continues to volunteer with USGS as a Scientist Emeritus.

Biography

Education

Ph.D. -- Environmental Science & Engineering, 1992
Oregon Graduate Institute of Science & Technology

B.S. -- Chemistry, 1985
University of Illinois at Urbana-Champaign

 

Research Interests

Dr. Rounds' research interests focus on the water-quality modeling of river and lake systems, with particular emphasis on temperature, nutrients, dissolved oxygen, and algae. Ongoing studies focus on producing a better understanding of heat fluxes and heat transport in the Willamette River system. Most of his work focuses on developing a better understanding of the characteristics and water-quality dynamics of a system so that it can be more effectively managed.

Dr. Rounds is the author of the Alkalinity Calculator, a tool that analyzes alkalinity titrations, and the Data Grapher, a set of tools to make custom graphs and tables from USGS continuous water-quality monitoring data.

 

Other Studies of Interest

Tualatin River Water-Quality Assessment [website]
Klamath River Monitoring and Modeling [website]

 

Selected Publications

Rounds, S.A., Freed, T.Z., Snyder, D.T., Smith, C.D., Doyle, M.C., Holmes, E., Mykut, C., Mayer, T., Stockenberg, E., and Pilson, S.L., 2020, Evaluation of restoration alternatives using water-budget tools for the Wapato Lake National Wildlife Refuge, northwestern Oregon: U.S. Geological Survey Scientific Investigations Report 2020–5013, 26 p., https://doi.org/10.3133/sir20205013.

Rounds, S.A., Pilson, S.L., Sullivan, A.B., and Stonewall, A.J., 2020, Evaluation of restoration alternatives using hydraulic models of lake outflow at Wapato Lake National Wildlife Refuge, northwestern Oregon: U.S. Geological Survey Scientific Investigations Report 2020–5014, 21 p., https://doi.org/10.3133/sir20205014.

Sullivan, A.B. and Rounds, S.A., 2020, Modeling a 2- and 4-foot drawdown in the Link River to Keno Dam reach of the Upper Klamath River, south-central Oregon: U.S. Geological Survey Scientific Investigations Report 2020-5001, 18 p.,  https://doi.org/10.3133/sir20205001.

Sobieszczyk, S., Jones, K.L., Rounds, S.A., Nilsen, E.B., and Morace, J.L., 2018, Prioritization framework for ranking riverine ecosystem stressors using example sites from the Tualatin River Basin, Oregon: U.S. Geological Survey Scientific Investigations Report 2018-5153, 40 p., https://doi.org/10.3133/sir20185153.

Sullivan, A.B., and Rounds, S.A., 2018, Modeling hydrodynamics, water temperature, and water quality in Klamath Straits Drain, Oregon and California, 2012–15: U.S. Geological Survey Scientific Investigations Report 2018-5134, 30 p.,  https://doi.org/10.3133/sir20185134.

Smith, C.D., Rounds, S.A., and Orzol, L.L., 2018, Klamath River Basin water-quality data: U.S. Geological Survey Fact Sheet 2018-3031, 4 p., https://doi.org/10.3133/fs20183031.

Mangano, J.F., Piatt, D.R., Jones, K.L, and Rounds, S.A., 2018, Water temperature in tributaries, off-channel features, and main channel of the lower Willamette River, northwestern Oregon, summers 2016 and 2017: U.S. Geological Survey Open-File Report 2018-1184, 33 p., https://doi.org/10.3133/ofr20181184.

Buccola, N.L., Turner, D.F., and Rounds, S.A., 2016, Water temperature effects from simulated dam operations and structures in the Middle Fork Willamette River, western Oregon: U.S. Geological Survey Open-File Report 2016–1159, 39 p., https://doi.org/10.3133/ofr20161159.

Sullivan, A.B., and Rounds, S.A., 2016, Modeling water quality, temperature, and flow in Link River, south-central Oregon: U.S. Geological Survey Open-File Report 2016–1146, 31 p., https://doi.org/10.3133/ofr20161146.

Buccola, N.L., Risley, J.C., and Rounds, S.A., 2016, Simulating future water temperatures in the North Santiam River, Oregon: J. Hydrol., v. 535, 318-330, https://doi.org/10.1016/j.jhydrol.2016.01.062.

Rounds, S.A., Carpenter, K.D., Fesler, K.J., and Dorsey, J.L., 2015, Upstream factors affecting Tualatin River algae—Tracking the 2008 Anabaena algae bloom to Wapato Lake, Oregon: U.S. Geological Survey Scientific Investigations Report 2015–5178, 41 p., https://doi.org/10.3133/sir20155178.

Rounds, S.A., and Buccola, N.L., 2015, Improved algorithms in the CE–QUAL–W2 water-quality model for blending dam releases to meet downstream water-temperature targets: U.S. Geological Survey Open-File Report 2015-1027, 36 p., https://doi.org/10.3133/ofr20151027.

Buccola, N.L., Stonewall, A.J., and Rounds, S.A., 2015, Simulations of a hypothetical temperature control structure at Detroit Dam on the North Santiam River, northwestern Oregon: U.S. Geological Survey Open-File Report 2015–1012, 30 p., https://doi.org/10.3133/ofr20151012.

Sobieszczyk, S., Keith, M.K., Goldman, J.H., and Rounds, S.A., 2015, Organic Matters—Investigating the sources, transport, and fate of organic matter in Fanno Creek, Oregon: U.S. Geological Survey Fact Sheet 2015–3003, 4 p., https://doi.org/10.3133/fs20153003.

Sullivan, A.B., Sogutlugil, I.E., Deas, M.L., and Rounds, S.A., 2014, Water-quality modeling of Klamath Straits Drain recirculation, a Klamath River wetland, and 2011 conditions for the Link River to Keno Dam reach of the Klamath River, Oregon: U.S. Geological Survey Open-File Report 2014–1185, 75 p., https://doi.org/10.3133/ofr20141185.

Sobieszczyk, S., Keith, M.K., Rounds, S.A., Goldman, J.H., 2014, Investigating organic matter in Fanno Creek, Oregon, Part 1 of 3— Estimating annual foliar biomass for a deciduous-dominant urban riparian corridor: J. Hydrol., v. 519D, 3001-3009, https://doi.org/10.1016/j.jhydrol.2014.06.054.

Keith, M.K., Sobieszczyk, S., Goldman, J.H., Rounds, S.A., 2014, Investigating organic matter in Fanno Creek, Oregon, Part 2 of 3—Sources, sinks, and transport of organic matter with fine sediment: J. Hydrol., v. 519D, 3010-3027, https://dx.doi.org/10.1016/j.jhydrol.2014.07.027.

Goldman, J.H., Rounds, S.A., Keith, M.K., Sobieszczyk, S., 2014, Investigating organic matter in Fanno Creek, Oregon, Part 3 of 3—Identifying and quantifying sources of organic matter to an urban stream: J. Hydrol., v. 519D, 3028-3041, https://dx.doi.org/10.1016/j.jhydrol.2014.07.033.

Buccola, N.L., Stonewall, A.J., Sullivan, A.B., Kim, Yoonhee, and Rounds, S.A., 2013, Development of CE-QUAL-W2 models for the Middle Fork Willamette and South Santiam Rivers, Oregon:  U.S. Geological Survey Open-File Report 2013-1196, 55 p.,  https://pubs.usgs.gov/of/2013/1186/.

Wood, T.M., Wherry, S.A., Carter, J.L., Kuwabara, J.S., Simon, N.S., and Rounds, S.A., 2013, Technical evaluation of a total maximum daily load model for Upper Klamath and Agency Lakes, Oregon:  U.S. Geological Survey Open-File Report 2013-1262, 69 p plus appendix, https://pubs.usgs.gov/of/2013/1262/.

Rounds, S.A., Wilde, F.D., and Ritz, G.F., 2013, Dissolved oxygen (version 3.0), in National field manual for the collection of water-quality data, Wilde, F.D. and Radtke, D.B., eds., U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9, Chapter A6, Section 6.2, 55 p.,  https://water.usgs.gov/owq/FieldManual/Chapter6/6.2_contents.html.

Sullivan, A.B., Sogutlugil, I.E., Rounds, S.A., and Deas, M.L., 2013, Modeling the water-quality effects of changes to the Klamath River upstream of Keno Dam, Oregon:  U.S. Geological Survey Scientific Investigations Report 2013-5135, 60 p.,  https://pubs.usgs.gov/sir/2013/5135/.

Carpenter, K.D., and Rounds, S.A., 2013, Plankton communities and summertime declines in algal abundance associated with low dissolved oxygen in the Tualatin River, Oregon: U.S. Geological Survey Scientific Investigations Report 2013–5037, 78 p.,  https://pubs.usgs.gov/sir/2013/5037/.

Sullivan, A.B., Rounds, S.A., Asbill-Case, J.R., and Deas, M.L., 2013, Macrophyte and pH buffering updates to the Klamath River water-quality model upstream of Keno Dam, Oregon: U.S. Geological Survey Scientific Investigations Report 2013-5016, 52 p.,  https://pubs.usgs.gov/sir/2013/5016/.

Buccola, N.L, Rounds, S.A., Sullivan, A.B., and Risley, J.C., 2012, Simulating potential structural and operational changes for Detroit Dam on the North Santiam River, Oregon, for downstream temperature management: U.S. Geological Survey Scientific Investigations Report 2012–5231, 68 p., https://pubs.usgs.gov/sir/2012/5231/.

Rounds, S.A., 2012, Alkalinity and acid neutralizing capacity (version 4.0), in National field manual for the collection of water-quality data, Wilde, F.D. and Radtke, D.B., eds., U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9, Chapter A6, Section 6.6, 45 p.,  https://water.usgs.gov/owq/FieldManual/Chapter6/section6.6/.

Sullivan, A.B., Rounds, S.A., Deas, M.L., and Sogutlugil, I.E., 2012, Dissolved oxygen analysis, TMDL model comparison, and particulate matter shunting—Preliminary results from three model scenarios for the Klamath River upstream of Keno Dam, Oregon: U.S Geological Survey Open-File Report 2012-1101, 30 p.,  https://pubs.usgs.gov/of/2012/1101/.

Goldman, J.H., Rounds, S.A., and Needoba, J.A., 2012, Applications of fluorescence spectroscopy for predicting percent wastewater in an urban stream: Environ. Sci. Technol., 46(8), 4374–4381, https://doi.org/10.1021/es2041114.

Buccola, N.L., and Rounds, S.A., 2011, Simulating potential structural and operational changes for Detroit Dam on the North Santiam River, Oregon--Interim Results: U.S. Geological Survey Open-File Report 2011.1268, 32 p.,  https://pubs.usgs.gov/of/2011/1268/.

Sullivan, A.B., Rounds, S.A., Deas, M.L., Asbill, J.R., Wellman, R.E., Stewart, M.A., Johnston, M.W., and Sogutlugil, I.E., 2011, Modeling hydrodynamics, water temperature, and water quality in the Klamath River upstream of Keno Dam, Oregon, 2006-09: U.S. Geological Survey Scientific Investigations Report 2011-5105, 70 p., https://pubs.usgs.gov/sir/2011/5105/.

Rounds, S.A., and Sullivan, A.B., 2010, Review of total maximum daily load models of Lost River and Klamath Straits Drain, Oregon and California: U.S. Geological Survey Administrative Report, 25 p.

Rounds, S.A., 2010, Thermal effects of dams in the Willamette River basin, Oregon: U.S. Geological Survey Scientific Investigations Report 2010-5153, 64 p., https://pubs.usgs.gov/sir/2010/5153/.

Bonn, B.A., and Rounds, S.A., 2010, Use of stable isotopes of carbon and nitrogen to identify sources of organic matter to bed sediments of the Tualatin River, Oregon: U.S. Geological Survey Scientific Investigations Report 2010-5154, 58 p., https://pubs.usgs.gov/sir/2010/5154/.

Rounds, S.A., and Sullivan, A.B., 2010, Review of revised Klamath River Total Maximum Daily Load models from Link River Dam to Keno Dam, Oregon: U.S. Geological Survey Administrative Report, 32 p.
Re-released as an Open-File Report in 2013:
Rounds, S.A., and Sullivan, A.B., 2013, Review of revised Klamath River Total Maximum Daily Load models from Link River Dam to Keno Dam, Oregon: U.S. Geological Survey Open-File Report 2013-1136, 31 p.,  https://pubs.usgs.gov/of/2013/1136/.

Risley, J.C., Constantz, J.A., Essaid, H.I., and Rounds, S.A., 2010, Effects of upstream dams versus groundwater pumping on stream temperature under varying climate conditions, Water Resour. Res., v. 46, no. 6, W06517, https://doi.org/10.1029/2009WR008587.

Anderson, C.W., and Rounds, S.A., 2010, Use of continuous monitors and automatosamplers to predict unmeasured water-quality constituents in tributaries of the Tualatin River, Oregon: U.S. Geological Survey Scientific Investigations Report 2010-5008, 76 p.,  https://pubs.usgs.gov/sir/2010/5008/.

Sullivan, A.B., Snyder, D.M., and Rounds, S.A., 2010, Controls on biochemical oxygen demand in the upper Klamath River, Oregon: Chemical Geology, v. 269, no. 1-2, p. 12-21, https://doi.org/10.1016/j.chemgeo.2009.08.007.

Ulrich, E.M., Foreman, W.T., Van Metre, P.C., Wilson, J.T., and Rounds, S.A., 2009, Enantiomer fractions of chlordane components in sediment from U.S. Geological Survey sites in lakes and rivers: Sci. Tot. Environ., v. 407, no. 22, p. 5884-5893, https://doi.org/10.1016/j.scitotenv.2009.08.023.

Rounds, S.A., Doyle, M.C., Edwards, P.M., and Furlong, E.T., 2009, Reconnaissance of pharmaceutical chemicals in urban streams of the Tualatin River basin, Oregon, 2002: U.S. Geological Survey Scientific Investigations Report 2009-5119, 22 p.,  https://pubs.usgs.gov/sir/2009/5119/.

Rounds, S.A., and Sullivan, A.B., 2009, Review of Klamath River total maximum daily load models from Link River Dam to Keno Dam, Oregon: U.S. Geological Survey Administrative Report, 37 p.,  https://www.usbr.gov/mp/kbao/waterquality/klamath_river_model_review_final.pdf.

Rounds, S.A., 2007, Temperature effects of point sources, riparian shading, and dam operations on the Willamette River, Oregon: U.S. Geological Survey Scientific Investigations Report 2007-5185, 34 p.,  https://pubs.usgs.gov/sir/2007/5185/.

Sullivan, A.B., Rounds, S.A., Sobieszczyk, S., and Bragg, H.M., 2007, Modeling hydrodynamics, water temperature, and suspended sediment in Detroit Lake, Oregon: U.S. Geological Survey Scientific Investigations Report 2007-5008, 40 p.,  https://pubs.usgs.gov/sir/2007/5008/.

Sullivan, A.B. and Rounds, S.A., 2006, Modeling water-quality effects of structural and operational changes to Scoggins Dam and Henry Hagg Lake, Oregon: U.S. Geological Survey Scientific Investigations Report 2006-5060, 36 p.,  https://pubs.usgs.gov/sir/2006/5060/.

Rounds, S.A. and Sullivan, A.B., 2006, Development and use of new routines in CE-QUAL-W2 to blend water from multiple reservoir outlets to meet downstream temperature targets, in Proceedings of the Third Federal Interagency Hydrologic Modeling Conference, April 2-6, 2006, Reno, NV: Subcommittee on Hydrology of the Interagency Advisory Committee on Water Information, ISBN 0-9779007-0-3,  https://or.water.usgs.gov/tualatin/fihmc3_w2_modifications.pdf.

Sullivan, A.B. and Rounds, S.A., 2005, Modeling hydrodynamics, temperature and water quality in Henry Hagg Lake, Oregon, 2000-2003: U.S. Geological Survey Scientific Investigations Report 2004-5261, 38 p.,  https://pubs.usgs.gov/sir/2004/5261/.

Flint, L.E., Flint, A.L., Curry, D.S., Rounds, S.A., and Doyle, M.C., 2005, Water-quality data from 2002 to 2003 and analysis of data gaps for development of Total Maximum Daily Loads in the lower Klamath River Basin, California: U.S. Geological Survey Scientific Investigations Report 2004-5255, 77 p.,  https://pubs.usgs.gov/sir/2004/5255/.

Sullivan, A.B. and Rounds, S.A., 2004, Modeling streamflow and water temperature in the North Santiam and Santiam Rivers, Oregon: U.S. Geological Survey Scientific Investigations Report 2004-5001, 35 p.,  https://pubs.usgs.gov/sir/2004/5001/.

Doyle, M.C. and Rounds, S.A., 2003, The effect of chamber mixing velocity on bias in measurement of sediment oxygen demand rates in the Tualatin River Basin, Oregon: U.S. Geological Survey Water-Resources Investigations Report 03-4097, 16 p.,  https://or.water.usgs.gov/pubs_dir/WRIR03-4097/.

Anderson, C.W. and Rounds, S.A., 2003, Phosphorus and E. coli and their relation to selected constituents during storm runoff conditions in Fanno Creek, Oregon, 1998-99: U.S. Geological Survey Water-Resources Investigations Report 02-4232, 34 p.,  https://pubs.usgs.gov/wri/wri024232/.

Rounds, S.A., 2002, Development of a neural network model for dissolved oxygen in the Tualatin River, Oregon, in Proceedings of the Second Federal Interagency Hydrologic Modeling Conference, July 29 - August 1, 2002, Las Vegas, NV: Subcommittee on Hydrology of the Interagency Advisory Committee on Water Information, https://or.water.usgs.gov/tualatin/ann_proceedings.pdf.

Rounds, S.A. and Wilde, F.D., 2001, Alkalinity and acid neutralizing capacity, in National field manual for the collection of water-quality data, Wilde, F.D. and Radtke, D.B., eds., U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9, Chapter 6.6, 50 p.,  https://water.usgs.gov/owq/FieldManual/Chapter6/section6.6/.

Rounds, S.A. and Wood, T.M., 2001, Modeling water quality in the Tualatin River, Oregon, 1991-1997: U.S. Geological Survey Water-Resources Investigations Report 01-4041, 53 p.,  https://or.water.usgs.gov/pubs_dir/Online/Pdf/01-4041.pdf.

Rounds, S.A., Wood, T.M., and Lynch, D.D., 1999, Modeling discharge, temperature, and water quality in the Tualatin River, Oregon: U.S. Geological Survey Water-Supply Paper 2465-B, 121 p.,  https://pubs.er.usgs.gov/usgspubs/wsp/wsp2465B.

Kelly, V.J., Lynch, D.D., and Rounds, S.A., 1999, Sources and transport of phosphorus and nitrogen during low-flow conditions in the Tualatin River, Oregon, 1991-1993: U.S. Geological Survey Water-Supply Paper 2465-C, 94 p.,  https://pubs.er.usgs.gov/usgspubs/wsp/wsp2465C.

Rounds, S.A. and Doyle, M.C., 1997, Sediment oxygen demand in the Tualatin River Basin, Oregon, 1992-1996: U.S. Geological Survey Water-Resources Investigations Report 97- 4103, 19 p.,  https://or.water.usgs.gov/pubs_dir/Online/Html/WRIR97-4103/.

Anderson, C.W., Rinella, F.A., and Rounds, S.A., 1996, Occurrence of selected trace elements and organic compounds and relations to land use in the Willamette River Basin, Oregon, 1992-1994: U.S. Geological Survey Water-Resources Investigations Report 96-4234, 68 p.,  https://pubs.er.usgs.gov/publication/wri964234.

Rounds, S.A. and Pankow, J.F., 1993, Determination of selected chlorinated benzenes in water by purging directly to a capillary column with whole column cryotrapping and electron capture detection: J. Chromatogr., v. 629, p. 321-327.

Rounds, S.A., Tiffany, B.A., and Pankow, J.F., 1993, Description of gas/particle sorption kinetics with an intraparticle diffusion model: desorption experiments: Environ. Sci. Technol., v. 27, p. 366-377.

Rounds, S.A. and Pankow, J.F., 1990, Application of a radial diffusion model to describe gas/particle sorption kinetics: Environ. Sci. Technol., v. 24, p. 1378-1386.

Bonn, B.A. and Rounds, S.A., 1990, DREAM - Analytical Groundwater Flow Programs: Chelsea, MI, Lewis Publishers, 109 p.