Stewart Rounds

Education

• Ph.D. -- Environmental Science & Engineering, 1992 - Oregon Graduate Institute of Science & Technology
• B.S. -- Chemistry, 1985 - University of Illinois at Urbana-Champaign

Professional Studies/Experience

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.

Selected Publications

Sullivan, A.B., and Rounds, S.A., 2021, Modeling water temperature response to dam operations and water management in Green Peter and Foster Lakes and the South Santiam River, Oregon: U.S. Geological Survey Scientific Investigations Report 2020–5145, 26 p., https://doi.org/10.3133/sir20205145.

Smith, C.D., Mangano, J.F., and Rounds, S.A., 2020, Temperature and water-quality diversity and the effects of surface-water connection in off-channel features of the Willamette River, Oregon, 2015–16: U.S. Geological Survey Scientific Investigations Report 2020–5068, 70 p., https://doi.org/10.3133/sir20205068.

Burdick, S.M., Hewitt, D.A., Martin, B.A., Schenk, L., and Rounds, S.A., 2020, Effects of harmful algal blooms and associated water-quality on endangered Lost River and shortnose suckers:  Harmful Algae, v. 97, 101847, https://doi.org/10.1016/j.hal.2020.101847.

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.