Publications
Below is a list of available Colorado Water Science Center publications and published products.
Filter Total Items: 813
Response of lake chemistry to atmospheric deposition and climate in selected Class I wilderness areas in the western United States, 1993-2009 Response of lake chemistry to atmospheric deposition and climate in selected Class I wilderness areas in the western United States, 1993-2009
The U.S. Geological Survey, in cooperation with the U.S. Department of Agriculture Forest Service, Air Resource Management, conducted a study to evaluate long-term trends in lake-water chemistry for 64 high-elevation lakes in selected Class I wilderness areas in Colorado, Idaho, Utah, and Wyoming during 1993 to 2009. Understanding how and why lake chemistry is changing in mountain areas...
Authors
M. Alisa Mast
Simulating the potential effects of climate change in two Colorado basins and at two Colorado ski areas Simulating the potential effects of climate change in two Colorado basins and at two Colorado ski areas
The mountainous areas of Colorado are used for tourism and recreation, and they provide water storage and supply for municipalities, industries, and agriculture. Recent studies suggest that water supply and tourist industries such as skiing are at risk from climate change. In this study, a distributed-parameter watershed model, the Precipitation-Runoff Modeling System (PRMS), is used to...
Authors
William Battaglin, Lauren E. Hay, Steve Markstrom
Redox chemistry and natural organic matter (NOM): Geochemists' dream, analytical chemists' nightmare Redox chemistry and natural organic matter (NOM): Geochemists' dream, analytical chemists' nightmare
Natural organic matter (NOM) is an inherently complex mixture of polyfunctional organic molecules. Because of their universality and chemical reversibility, oxidation/reductions (redox) reactions of NOM have an especially interesting and important role in geochemistry. Variabilities in NOM composition and chemistry make studies of its redox chemistry particularly challenging, and details...
Authors
Donald L. Macalady, Katherine Walton-Day
Trends in lake chemistry in response to atmospheric deposition and climate in selected Class I wilderness areas in Colorado, Idaho, Utah, and Wyoming, 1993-2009 Trends in lake chemistry in response to atmospheric deposition and climate in selected Class I wilderness areas in Colorado, Idaho, Utah, and Wyoming, 1993-2009
In 2010, the U.S. Geological Survey, in cooperation with the U.S. Department of Agriculture Forest Service, Air Resource Management, began a study to evaluate long-term trends in lake-water chemistry for 64 high-elevation lakes in selected Class I wilderness areas in Colorado, Idaho, Utah, and Wyoming during 1993 to 2009. The purpose of this report is to describe trends in the chemical...
Authors
M. Alisa Mast, George P. Ingersoll
Occurrence of azoxystrobin, propiconazole, and selected other fungicides in US streams, 2005-2006 Occurrence of azoxystrobin, propiconazole, and selected other fungicides in US streams, 2005-2006
Fungicides are used to prevent foliar diseases on a wide range of vegetable, field, fruit, and ornamental crops. They are generally more effective as protective rather than curative treatments, and hence tend to be applied before infections take place. Less than 1% of US soybeans were treated with a fungicide in 2002 but by 2006, 4% were treated. Like other pesticides, fungicides can...
Authors
William A. Battaglin, Mark W. Sandstrom, Kathryn Kuivila, Dana W. Kolpin, Michael T. Meyer
A comparison of recharge rates in aquifers of the United States based on groundwater-age data A comparison of recharge rates in aquifers of the United States based on groundwater-age data
An overview is presented of existing groundwater-age data and their implications for assessing rates and timescales of recharge in selected unconfined aquifer systems of the United States. Apparent age distributions in aquifers determined from chlorofluorocarbon, sulfur hexafluoride, tritium/helium-3, and radiocarbon measurements from 565 wells in 45 networks were used to calculate...
Authors
P.B. McMahon, Niel Plummer, J.K. Böhlke, S.D. Shapiro, S.R. Hinkle
Semi-quantitative evaluation of fecal contamination potential by human and ruminant sources using multiple lines of evidence Semi-quantitative evaluation of fecal contamination potential by human and ruminant sources using multiple lines of evidence
Protocols for microbial source tracking of fecal contamination generally are able to identify when a source of contamination is present, but thus far have been unable to evaluate what portion of fecal-indicator bacteria (FIB) came from various sources. A mathematical approach to estimate relative amounts of FIB, such as Escherichia coli, from various sources based on the concentration...
Authors
D. M. Stoeckel, Erin A. Stelzer, Stogner, David P. Mau
Assessing possible visitor-use impacts on water quality in Yosemite National Park, California Assessing possible visitor-use impacts on water quality in Yosemite National Park, California
There is concern that visitor-use associated activities, such as bathing, dish washing, wastewater production, and stock animal use near lakes and streams, could cause degradation of water quality in Yosemite National Park. A study was conducted during 2004–2007 to assess patterns in nutrient and Escherichia coli (E. coli) concentrations in the Merced and Tuolumne Rivers and characterize...
Authors
David W. Clow, Rachael S. Peavler, Jim Roche, Anna K. Panorska, James M. Thomas, Steve Smith
Towards identifying the next generation of superfund and hazardous waste site contaminants Towards identifying the next generation of superfund and hazardous waste site contaminants
Background This commentary evolved from a workshop sponsored by the National Institute of Environmental Health Sciences titled "Superfund Contaminants: The Next Generation" held in Tucson, Arizona, in August 2009. All the authors were workshop participants. Objectives Our aim was to initiate a dynamic, adaptable process for identifying contaminants of emerging concern (CECs) that are...
Authors
Wendell P. Ela, David L. Sedlak, Morton A. Barlaz, Heather F. Henry, Derek C.G. Muir, Deborah L. Swackhamer, Eric J. Weber, Robert G. Arnold, P. Lee Ferguson, Jennifer A. Field, Edward T. Furlong, John P. Giesy, Rolf U. Halden, Tala Henry, Ronald A. Hites, Keri C. Hornbuckle, Philip H. Howard, Richard G. Luthy, Anita K. Meyer, A. Eduardo Saez, Frederick S. vom Saal, Chris D. Vulpe, Mark R. Wiesner
2009 Monitoring and tracking wet nitrogen deposition at Rocky Mountain National Park 2009 Monitoring and tracking wet nitrogen deposition at Rocky Mountain National Park
No abstract available.
Authors
Kristi Morris, Alisa Mast, Greg Wetherbee, Jill Baron, Curt Taipale, Tamara Blett, David Gay, Eric Richer
Streamflow gain-loss characteristics of Elkhead Creek downstream from Elkhead Reservoir near Craig, Colorado, 2009 Streamflow gain-loss characteristics of Elkhead Creek downstream from Elkhead Reservoir near Craig, Colorado, 2009
The U.S. Geological Survey (USGS), in cooperation with the Colorado Water Conservation Board, the Upper Colorado River Endangered Fish Recovery Program (UCREFRP), Colorado Division of Water Resources, and City of Craig studied the gain-loss characteristics of Elkhead Creek downstream from Elkhead Reservoir to the confluence with the Yampa River during August through October 2009. Earlier
Authors
Barbara C. Ruddy
Digital map of the aquifer boundary for the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming Digital map of the aquifer boundary for the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming
This digital data set represents the extent of the High Plains aquifer in the central United States. The extent of the High Plains aquifer covers 174,000 square miles in eight states: Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming. This data set represents a compilation of information from digital and paper sources and personal communication. This...
Authors
Sharon Qi