Unified Interior Regions

Colorado

The Rocky Mountain Region ranges from the Colorado Rockies to the Western Deserts to the Great Plains. The Rocky Mountain Region conducts multi- and interdisciplinary research and monitoring in locations across the Region, the United States, around the world, and across our solar system.

States L2 Landing Page Tabs

Filter Total Items: 407
Publication Thumbnail
Year Published: 2003

Atmospheric deposition of nutrients, pesticides, and mercury in Rocky Mountain National Park, Colorado, 2002

Nutrients, current-use pesticides, and mercury were measured in atmospheric deposition during summer in Rocky Mountain National Park in Colorado to improve understanding of the type and magnitude of atmospheric contaminants being deposited in the park. Two deposition sites were established on the east side of the park: one at an elevation of 2,902...

Mast, Alisa; Campbell, Donald H.; Ingersoll, George P.; Foreman, William T.; Krabbenhoft, David P.
Atmospheric deposition of nutrients, pesticides, and mercury in Rocky Mountain National Park, Colorado, 2002; 2003; WRI; 2003-4241; Mast, M. Alisa; Campbell, Donald H.; Ingersoll, George P.; Foreman, William T.; Krabbenhoft, David P.

Publication Thumbnail
Year Published: 2003

Biosolids, soils, ground-water, and streambed-sediment data for a biosolids-application area near Deer Trail, Colorado, 1999

In January 1999, the U.S. Geological Survey began an expanded monitoring program near Deer Trail, Colorado, in cooperation with the Metro Wastewater Reclamation District and the North Kiowa Bijou Groundwater Management District. Monitoring components were biosolids, soils, crops, ground water, and streambed sediments. The monitoring program...

Stevens, Michael R.; Yager, Tracy J.B.; Smith, D. B.; Crock, J. G.
Biosolids, soils, ground-water, and streambed-sediment data for a biosolids-application area near Deer Trail, Colorado, 1999; 2003; OFR; 2002-51; Stevens, Michael R.; Yager, Tracy J. B.; Smith, D. B.; Crock, J. G.

Publication Thumbnail
Year Published: 2003

Rocky Mountain snowpack chemistry at selected sites for 2001

Because regional-scale atmospheric deposition data in the Rocky Mountains are sparse, a program was designed by the U.S. Geological Survey, in cooperation with the National Park Service, U.S. Department of Agriculture Forest Service, and other agencies, to more thoroughly determine the chemical composition of precipitation and to identify sources...

Ingersoll, George P.; Mast, Alisa; Clow, David W.; Nanus, Leora; Campbell, Donald H.; Handran, Heather
Rocky Mountain snowpack chemistry at selected sites for 2001; 2003; OFR; 2003-48; Ingersoll, George P.; Mast, M. Alisa; Clow, David W.; Nanus, Leora; Campbell, Donald H.; Handran, Heather

Publication Thumbnail
Year Published: 2003

Ground water occurrence and contributions to streamflow in an alpine catchment, Colorado Front Range

Ground water occurrence, movement, and its contribution to streamflow were investigated in Loch Vale, an alpine catchment in the Front Range of the Colorado Rocky Mountains. Hydrogeomorphologic mapping, seismic refraction measurements, and porosity and permeability estimates indicate that talus slopes are the primary ground water reservoir, with a...

Clow, D.W.; Schrott, L.; Webb, R.; Campbell, K.; Torizzo, A.O.; Dornblaser, M.

Publication Thumbnail
Year Published: 2003

Comparison of 2002 Water Year and Historical Water-Quality Data, Upper Gunnison River Basin, Colorado

Introduction: Population growth and changes in land-use practices have the potential to affect water quality and quantity in the upper Gunnison River basin. In 1995, the U.S. Geological Survey (USGS), in cooperation with local sponsors, City of Gunnison, Colorado River Water Conservation District, Crested Butte South Metropolitan District,...

Spahr, N.E.
Comparison of 2002 Water Year and Historical Water-Quality Data, Upper Gunnison River Basin, Colorado; 2003; DS; 101; Spahr, N. E.

Publication Thumbnail
Year Published: 2003

Effect of the Paradox Valley Unit on the dissolved-solids load of the Dolores River near Bedrock, Colorado, 1988-2001

Discharge of brine with an average dissolved-solids concentration of about 256,000 milligrams per liter from alluvium in Paradox Valley, a collapsed salt anticline, substantially increases the dissolved-solids load of the Dolores River. In 1996, the Bureau of Reclamation began operation of the Paradox Valley Unit, a series of brine-withdrawal...

Chafin, Daniel T.
Effect of the Paradox Valley Unit on the dissolved-solids load of the Dolores River near Bedrock, Colorado, 1988-2001; 2003; WRI; 2002-4275; Chafin, Daniel T.

Publication Thumbnail
Year Published: 2003

Ground-water-quality assessment of shallow aquifers in the Front Range Urban Corridor, Colorado, 1954-98

Historical (1954-98) water-quality data for major ions, trace elements, major plant nutrients, and organic constituents collected in 3,870 sampling events at 2,138 shallow wells represent ground-water quality in shallow aquifers that underlie the Front Range Urban Corridor in Colorado. Nonparametric summary statistics and maps of concentrations...

Flynn, Jennifer L.
Ground-water-quality assessment of shallow aquifers in the Front Range Urban Corridor, Colorado, 1954-98; 2003; WRI; 2002-4247; Flynn, Jennifer L.

Publication Thumbnail
Year Published: 2003

Hydrology and water-quality characteristics of Muddy Creek and Wolford Mountain Reservoir near Kremmling, Colorado, 1990 through 2001

A water-quality monitoring program was begun in March 1985 on Muddy Creek in anticipation of the construction of a reservoir water-storage project. Wolford Mountain Reservoir was constructed by the Colorado River Water Conservation District during 1992-94. The reservoir began to be filled in 1995. Water quality generally was good in Muddy...

Stevens, Michael R.; Sprague, Lori A.
Hydrology and water-quality characteristics of Muddy Creek and Wolford Mountain Reservoir near Kremmling, Colorado, 1990 through 2001; 2003; WRI; 2003-4073; Stevens, Michael R.; Sprague, Lori A.

Publication Thumbnail
Year Published: 2003

Limnology of Blue Mesa, Morrow Point, and Crystal Reservoirs, Curecanti National Recreation area, during 1999, and a 25-year retrospective of nutrient conditions in Blue Mesa Reservoir, Colorado

The U.S. Geological Survey and the National Park Service conducted a water-quality investigation in Curecanti National Recreation Area in Colorado from April through December 1999. Current (as of 1999) limnological characteristics, including nutrients, phytoplankton, chlorophyll-a, trophic status, and the water quality of stream inflows and...

Bauch, Nancy J.; Malick, Matt
Limnology of Blue Mesa, Morrow Point, and Crystal Reservoirs, Curecanti National Recreation area, during 1999, and a 25-year retrospective of nutrient conditions in Blue Mesa Reservoir, Colorado; 2003; WRI; 2002-4199; Bauch, Nancy J.; Malick, Matt

Publication Thumbnail
Year Published: 2003

Probability of detecting atrazine/desethyl-atrazine and elevated concentrations of nitrate in ground water in Colorado

Draft Federal regulations may require that each State develop a State Pesticide Management Plan for the herbicides atrazine, alachlor, metolachlor, and simazine. Maps were developed that the State of Colorado could use to predict the probability of detecting atrazine and desethyl-atrazine (a breakdown product of atrazine) in ground water in...

Rupert, Michael G.
Probability of detecting atrazine/desethyl-atrazine and elevated concentrations of nitrate in ground water in Colorado; 2003; WRI; 2002-4269; Rupert, Michael G.

Publication Thumbnail
Year Published: 2003

Streamwater Quality Data from the 2002 Hayman, Hinman, and Missionary Ridge Wildfires, Colorado, 2003

Concern about water-quality issues related to wildfires in Colorado has intensified because of the wildfires that occurred in Colorado during the summer of 2002. In 2003, the U.S. Geological Survey (USGS) conducted water-quality sampling of burned and unburned watersheds in the areas affected by the Hayman, Hinman, and Missionary Ridge wildfires...

Ranalli, Anthony J.; Stevens, Michael R.
Streamwater Quality Data from the 2002 Hayman, Hinman, and Missionary Ridge Wildfires, Colorado, 2003; 2003; DS; 109; Ranalli, Anthony J.; Stevens, Michael R.

Publication Thumbnail
Year Published: 2003

Using Logistic Regression To Predict the Probability of Debris Flows Occurring in Areas Recently Burned By Wildland Fires

Logistic regression was used to predict the probability of debris flows occurring in areas recently burned by wildland fires. Multiple logistic regression is conceptually similar to multiple linear regression because statistical relations between one dependent variable and several independent variables are evaluated. In logistic regression,...

Rupert, Michael G.; Cannon, Susan H.; Gartner, Joseph E.
Using Logistic Regression To Predict the Probability of Debris Flows Occurring in Areas Recently Burned By Wildland Fires; 2003; OFR; 2003-500; Rupert, Michael G.; Cannon, Susan H.; Gartner, Joseph E.