Stewart Rounds (Former Employee)
Science and Products
Filter Total Items: 67
Investigating organic matter in Fanno Creek, Oregon, Part 2 of 3: sources, sinks, and transport of organic matter with fine sediment Investigating organic matter in Fanno Creek, Oregon, Part 2 of 3: sources, sinks, and transport of organic matter with fine sediment
Organic matter (OM) is abundant in Fanno Creek, Oregon, USA, and has been tied to a variety of water-quality concerns, including periods of low dissolved oxygen downstream in the Tualatin River, Oregon. The key sources of OM in Fanno Creek and other Tualatin River tributaries have not been fully identified, although isotopic analyses from previous studies indicated a predominantly...
Authors
Mackenzie K. Keith, Steven Sobieszczyk, Jami H. Goldman, Stewart A. Rounds
Investigating organic matter in Fanno Creek, Oregon, Part 3 of 3: identifying and quantifying sources of organic matter to an urban stream Investigating organic matter in Fanno Creek, Oregon, Part 3 of 3: identifying and quantifying sources of organic matter to an urban stream
The sources, transport, and characteristics of organic matter (OM) in Fanno Creek, an urban stream in northwest Oregon, were assessed and quantified using: (1) optical instruments to calculate transported loads of dissolved, particulate, and total organic carbon, (2) fluorescence spectroscopy and stable isotope ratios (δ13C, δ15N) to elucidate sources and chemical properties of OM...
Authors
Jami H. Goldman, Stewart A. Rounds, Mackenzie K. Keith, Steven Sobieszczyk
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 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
The upper Klamath River and adjacent Lost River are interconnected basins in south-central Oregon and northern California. Both basins have impaired water quality with Total Maximum Daily Loads (TMDLs) in progress or approved. In cooperation with the Bureau of Reclamation, the U.S. Geological Survey (USGS) and Watercourse Engineering, Inc., have conducted modeling and research to inform...
Authors
Annett B. Sullivan, I. Ertugrul Sogutlugil, Michael L. Deas, Stewart A. Rounds
Review of revised Klamath River Total Maximum Daily Load models from Link River Dam to Keno Dam, Oregon Review of revised Klamath River Total Maximum Daily Load models from Link River Dam to Keno Dam, Oregon
Flow and water-quality models are being used to support the development of Total Maximum Daily Load (TMDL) plans for the Klamath River downstream of Upper Klamath Lake (UKL) in south-central Oregon. For riverine reaches, the RMA-2 and RMA-11 models were used, whereas the CE-QUAL-W2 model was used to simulate pooled reaches. The U.S. Geological Survey (USGS) was asked to review the most...
Authors
Stewart A. Rounds, Annett B. Sullivan
Modeling the Water - Quality Effects of Changes to the Klamath River Upstream of Keno Dam, Oregon Modeling the Water - Quality Effects of Changes to the Klamath River Upstream of Keno Dam, Oregon
The Link River to Keno Dam (Link-Keno) reach of the Klamath River, Oregon, generally has periods of water-quality impairment during summer, including low dissolved oxygen, elevated concentrations of ammonia and algae, and high pH. Efforts are underway to improve water quality in this reach through a Total Maximum Daily Load (TMDL) program and other management and operational actions. To...
Authors
Annett B. Sullivan, I. Ertugrul Sogutlugil, Stewart A. Rounds, Michael L. Deas
Plankton communities and summertime declines in algal abundance associated with low dissolved oxygen in the Tualatin River, Oregon Plankton communities and summertime declines in algal abundance associated with low dissolved oxygen in the Tualatin River, Oregon
Phytoplankton populations in the Tualatin River in northwestern Oregon are an important component of the dissolved oxygen (DO) budget of the river and are critical for maintaining DO levels in summer. During the low-flow summer period, sufficient nutrients and a long residence time typically combine with ample sunshine and warm water to fuel blooms of cryptophyte algae, diatoms, green...
Authors
Kurt D. Carpenter, Stewart A. Rounds
Non-USGS Publications**
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. https://doi.org/10.1016/0021-9673(93)87046-O
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. https://doi.org/10.1021/es00039a018
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. https://doi.org/10.1021/es00079a012
Bonn, B.A. and Rounds, S.A., 1990, DREAM - Analytical Groundwater Flow Programs: Chelsea, MI, Lewis Publishers, 109 p. https://www.taylorfrancis.com/books/mono/10.1201/9781003069898/dream-bernadine-bonn-stewart-rounds
Larson, R.A., and Rounds, S.A., 1987, Photochemistry in Aqueous Surface Layers: 1-Naphthol: chap. 15, pp 206-214 in Photochemistry of Environmental Aquatic Systems, Zika, R.G. and Cooper, W.J., editors, ACS Symposium Series volume 327, American Chemical Society. https://pubs.acs.org/doi/pdf/10.1021/bk-1987-0327.ch015
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 67
Investigating organic matter in Fanno Creek, Oregon, Part 2 of 3: sources, sinks, and transport of organic matter with fine sediment Investigating organic matter in Fanno Creek, Oregon, Part 2 of 3: sources, sinks, and transport of organic matter with fine sediment
Organic matter (OM) is abundant in Fanno Creek, Oregon, USA, and has been tied to a variety of water-quality concerns, including periods of low dissolved oxygen downstream in the Tualatin River, Oregon. The key sources of OM in Fanno Creek and other Tualatin River tributaries have not been fully identified, although isotopic analyses from previous studies indicated a predominantly...
Authors
Mackenzie K. Keith, Steven Sobieszczyk, Jami H. Goldman, Stewart A. Rounds
Investigating organic matter in Fanno Creek, Oregon, Part 3 of 3: identifying and quantifying sources of organic matter to an urban stream Investigating organic matter in Fanno Creek, Oregon, Part 3 of 3: identifying and quantifying sources of organic matter to an urban stream
The sources, transport, and characteristics of organic matter (OM) in Fanno Creek, an urban stream in northwest Oregon, were assessed and quantified using: (1) optical instruments to calculate transported loads of dissolved, particulate, and total organic carbon, (2) fluorescence spectroscopy and stable isotope ratios (δ13C, δ15N) to elucidate sources and chemical properties of OM...
Authors
Jami H. Goldman, Stewart A. Rounds, Mackenzie K. Keith, Steven Sobieszczyk
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 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
The upper Klamath River and adjacent Lost River are interconnected basins in south-central Oregon and northern California. Both basins have impaired water quality with Total Maximum Daily Loads (TMDLs) in progress or approved. In cooperation with the Bureau of Reclamation, the U.S. Geological Survey (USGS) and Watercourse Engineering, Inc., have conducted modeling and research to inform...
Authors
Annett B. Sullivan, I. Ertugrul Sogutlugil, Michael L. Deas, Stewart A. Rounds
Review of revised Klamath River Total Maximum Daily Load models from Link River Dam to Keno Dam, Oregon Review of revised Klamath River Total Maximum Daily Load models from Link River Dam to Keno Dam, Oregon
Flow and water-quality models are being used to support the development of Total Maximum Daily Load (TMDL) plans for the Klamath River downstream of Upper Klamath Lake (UKL) in south-central Oregon. For riverine reaches, the RMA-2 and RMA-11 models were used, whereas the CE-QUAL-W2 model was used to simulate pooled reaches. The U.S. Geological Survey (USGS) was asked to review the most...
Authors
Stewart A. Rounds, Annett B. Sullivan
Modeling the Water - Quality Effects of Changes to the Klamath River Upstream of Keno Dam, Oregon Modeling the Water - Quality Effects of Changes to the Klamath River Upstream of Keno Dam, Oregon
The Link River to Keno Dam (Link-Keno) reach of the Klamath River, Oregon, generally has periods of water-quality impairment during summer, including low dissolved oxygen, elevated concentrations of ammonia and algae, and high pH. Efforts are underway to improve water quality in this reach through a Total Maximum Daily Load (TMDL) program and other management and operational actions. To...
Authors
Annett B. Sullivan, I. Ertugrul Sogutlugil, Stewart A. Rounds, Michael L. Deas
Plankton communities and summertime declines in algal abundance associated with low dissolved oxygen in the Tualatin River, Oregon Plankton communities and summertime declines in algal abundance associated with low dissolved oxygen in the Tualatin River, Oregon
Phytoplankton populations in the Tualatin River in northwestern Oregon are an important component of the dissolved oxygen (DO) budget of the river and are critical for maintaining DO levels in summer. During the low-flow summer period, sufficient nutrients and a long residence time typically combine with ample sunshine and warm water to fuel blooms of cryptophyte algae, diatoms, green...
Authors
Kurt D. Carpenter, Stewart A. Rounds
Non-USGS Publications**
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. https://doi.org/10.1016/0021-9673(93)87046-O
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. https://doi.org/10.1021/es00039a018
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. https://doi.org/10.1021/es00079a012
Bonn, B.A. and Rounds, S.A., 1990, DREAM - Analytical Groundwater Flow Programs: Chelsea, MI, Lewis Publishers, 109 p. https://www.taylorfrancis.com/books/mono/10.1201/9781003069898/dream-bernadine-bonn-stewart-rounds
Larson, R.A., and Rounds, S.A., 1987, Photochemistry in Aqueous Surface Layers: 1-Naphthol: chap. 15, pp 206-214 in Photochemistry of Environmental Aquatic Systems, Zika, R.G. and Cooper, W.J., editors, ACS Symposium Series volume 327, American Chemical Society. https://pubs.acs.org/doi/pdf/10.1021/bk-1987-0327.ch015
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.