Water-quality assessment of the Arkansas River Basin, southeastern Colorado, 1990-93

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : USGS Information Services [distributor], 1998

Methods to identify changes in background water-quality conditions using dissolved-solids concentrations and loads as indicators, Arkansas River and Fountain Creek, in the vicinity...

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey ; U.S. Geological Survey, Branch of Information Services [distributor], 2004

Characterization of water quality in Government Highline Canal at Camp 7 Diversion and Highline Lake, Mesa County, Colorado, July 2000 through September 2003

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey, 2005

Determination of instream metal loads using tracer-injection and synoptic-sampling techniques, Wightman Fork, southwestern Colorado, July 1999

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : USGS Information Services [distributor], 2001

Determination of instream metal loads using tracer-injection and synoptic-sampling techniques in Wightman Fork, southwestern Colorado, September 1997

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : USGS Information Services [distributor], 2001

Characterization of water quality in Government Highline Canal at Camp 7 Diversion and Highline Lake, Mesa County, Colorado, July 2000 through September 2003

by Ortiz, Roderick F.
Published: U.S. Geological Survey, 2005

Baseline characterization of water quality and mass loading in Piceance Creek, Rio Blanco County, Colorado, December 2000

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : Information Services [distributor], 2002

Characterization of water quality in selected tributaries of the Alamosa River, southwestern Colorado, including comparisons to instream water-quality standards and toxicological r...

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : U.S. Geological Survey, Information Services [distributor], 2001

Ground-water quality of alluvial and sedimentary-rock aquifers in the vicinity of Fairplay and Alma, Park County, Colorado, September-October 2002

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey, 2004

Ground-water quality of granitic- and volcanic-rock aquifers in southeastern Park County, Colorado, July-August 2003

by Ortiz, Roderick F.
Published: U.S. Dept.of the Interior, U.S. Geological Survey, 2004

Diurnal variations in metal concentrations in the Alamosa River and Wightman Fork, southwestern Colorado, 1995-97

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey : USGS Information Services [distributor], 2001

Ground-water quality of granitic- and volcanic-rock aquifers in southeastern Park County, Colorado, July-August 2003

by Ortiz, Roderick F.
Published: U.S. Dept. of the Interior, U.S. Geological Survey, 2004

Simulated effects of proposed Arkansas Valley Conduit on hydrodynamics and water quality for projected demands through 2070, Pueblo Reservoir, southeastern Colorado

by Ortiz, Roderick F.,
Published: U.S. Department of the Interior, U.S. Geological Survey, 2013

Estimates of gains and losses from unmeasured sources and sinks for streamflow and dissolved-solids load in selected reaches of the Arkansas River, southeastern Colorado, 2009-2010

by Ortiz, Roderick F.,
Published: U.S. Department of the Interior, U.S. Geological Survey, 2013

Diurnal variations in metal concentrations in the Alamosa River and Wightman Fork, southwestern Colorado, 1995-97

by Ortiz, Roderick F.,
Published: U.S. Geological Survey, 2001

Baseline characterization of water quality and mass loading in Piceance Creek, Rio Blanco County, Colorado, December 2000

by Ortiz, Roderick F.,
Published: U.S. Department of the Interior, U.S. Geological Survey, 2002

Ground-water quality and potential effects of individual sewage disposal system effluent on ground-water quality in Park County, Colorado, 2001-2004

by Miller, Lisa D.
Published: U.S. Dept. of the Interior, U.S. Geological Survey, 2007

Geohydrology and ground-water quality at the Pueblo Depot Activity landfill near Pueblo, Colorado

by Watts, Kenneth R.
Published: Dept. of the Interior, U.S. Geological Survey : Books and Open-File Reports Section, distributor, 1990

Selected hydrologic data for Fountain Creek and Monument Creek Basins, east-central Colorado

by Kuhn, Gerhard.
Published: U.S. Geological Survey : Books and Open-File Reports Section [distributor], 1989

Sources of metal loads to the Alamosa River and estimation of seasonal and annual metal loads for the Alamosa River basin, Colorado, 1995-97

Published: U.S. Dept. of the Interior, U.S. Geological Survey : Information Services [distributor], 2002