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

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. Previous and ongoing projects include work on the Tualatin River and its tributaries, Henry Hagg Lake, Detroit Lake and the North Santiam River, the Willamette River, and selected reaches of the Klamath River. 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 in the future.

In addition, 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 Projects

Tualatin River Water-Quality Assessment [website]

A multifaceted, interdisciplinary, and long-term assessment of water quality in the Tualatin River and its tributaries. Selected topics of investigation include:

• effects of beaver on the hydrology and water quality of urban streams,
• dynamics of algae populations,
• water-quality modeling with an emphasis on phosphorus and its links to algae and dissolved oxygen,
• measurement of sediment oxygen demand,
• real-time water-quality monitoring,
• trends and seasonality of water quality, and
• various special topics.

Klamath River Monitoring and Modeling [website]

An assessment of water quality in the Klamath River between Upper Klamath Lake and the Keno Dam. Study components include an extensive monitoring effort, specialized research investigations, and development of or modifications to a water-quality model. 
 

Willamette River Monitoring [website]

Monitoring of water quality in the Willamette River at Portland, OR.

Selected Publications

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., doi: 10.3133/sir20185153
[Online at 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., doi: 10.3133/sir20185134
[Online at https://doi.org/10.3133/sir20185134.]

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., doi: 10.3133/ofr20181184
[Online at 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., doi: 10.3133/ofr20161159
[Online at http://dx.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., doi: 10.3133/ofr20161146
[Online at http://dx.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, doi: 10.1016/j.jhydrol.2016.01.062
[Online at http://dx.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., doi: 10.3133/sir20155178
[Online at http://dx.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., doi: 10.3133/ofr20151027
[Online at http://pubs.usgs.gov/of/2015/1027/.]

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., doi: 10.3133/ofr20151012
[Online at http://pubs.usgs.gov/of/2015/1012/.]

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., doi: 10.3133/fs20153003
[Online at http://pubs.usgs.gov/fs/2015/3003/.]

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., doi: 10.3133/ofr20141185
[Online at http://pubs.usgs.gov/of/2014/1185/.]

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, doi: 10.1016/j.jhydrol.2014.06.054
[Online at http://dx.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, doi: 10.1016/j.jhydrol.2014.07.027
[Online at http://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, doi: 10.1016/j.jhydrol.2014.07.033
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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, doi: 10.1021/es2041114.
[Online at http://dx.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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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, doi: 10.1029/2009WR008587
[Online at http://dx.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.
[Online at http://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, doi: 10.1016/j.chemgeo.2009.08.007
[Online at http://dx.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, doi: 10.1016/j.scitotenv.2009.08.023
[Online at http://dx.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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.
[Online at http://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.