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Page 3718, results 92926 - 92950

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Not all publications have extents, not all extents are completely accurate
Data from synoptic water-quality studies on the Colorado River in the Grand Canyon, Arizona, November 1990 and June 1991
Howard E. Taylor, D.B. Peart, Ronald C. Antweiler, T.I. Brinton, W. L. Campbell, J.R. Barbarino, D.A. Roth, R. J. Hart, R. C. Averett
1996, Open-File Report 96-614
Two water-quality synoptic studies were made on the Colorado River in the Grand Canyon, Arizona. Field measurements and the collection of water samples for laboratory analysis were made at 10 mainstem and 6 tributary sites every 6 hours for a 48-hour period on November 5-6, 1990, and again on June...
Atlas of ground-water resources in Puerto Rico and the U.S. Virgin Islands
Thalia D. Veve, Bruce E. Taggart, editor(s)
1996, Water-Resources Investigations Report 94-4198
This atlas presents an overview of the ground-water resources of the main island of Puerto Rico; two of its larger offshore islands, Isla de Culebra and Isla de Vieques; and the three principal islands of the U.S. Virgin Islands, St. Thomas, St. John, and St. Croix. The atlas presents the...
Ground-water hydrology, historical water use, and simulated ground-water flow in Cretaceous-age Coastal Plain aquifers near Charleston and Florence, South Carolina
B. G. Campbell, Marijke van Heeswijk
1996, Water-Resources Investigations Report 96-4050
A quasi-three-dimensional, transient, digital, ground-water flow model representing the Coastal Plain aquifers of South Carolina, has been constructed to assist in defining the ground- water-flow system of Cretaceous aquifers near Charleston and Florence, S.C. Both cities are near the centers of large (greater than 150 feet) potentiometric declines in the...
Ground-water quality in the Calumet Region of northwestern Indiana and northeastern Illinois, June 1993
Richard F. Duwelius, Robert T. Kay, Scott T. Prinos
1996, Water-Resources Investigations Report 95-4244
Water samples were collected from 128 wells in a large industrial and urban area in northwestern Indiana and northeastern Illinois during June 1993. Samples were collected from wells completed in one of four geohydrologic units: surficial sand aquifer (Calumet aquifer), clay confining unit, confined sand aquifers, and a carbonate-bedrock aquifer...
Ground-water levels in Wyoming, January 1986 through September 1995
J. P. Mason, S. L. Green
1996, Open-File Report 96-648
Water levels were measured in a network of 81 observation wells in Wyoming as of September 1995. The wells are located mainly in areas where ground water is used in large quantities for irrigation or municipal purposes. Water-level data were collected at 74 of the 81 observation...
Total dissolved gas, barometric pressure, and water temperature data, lower Columbia River, Oregon and Washington, 1996
Dwight Q. Tanner, Howard E. Harrison, Stuart W. McKenzie
1996, Open-File Report 96-662-A
Increased levels of total dissolved gas pressure can cause gas-bubble trauma in fish downstream from dams on the Columbia River. In cooperation with the U.S. Army Corps of Engineers, the U.S. Geological Survey collected data on total dissolved gas pressure, barometric pressure, water temperature, and dissolved oxygen pressure at 11...
A modified index for assessment of potential scour at bridges over waterways
Edward J. Doheny
1996, Open-File Report 96-554
The modified potential-scour index described in this report is based on a potential-scour index used by the U.S. Geological Survey Maryland District (Maryland index), and a prototype index developed by the U.S. Geological Survey Tennessee District (Tennessee index). The modifications were made to (1) improve...
Nutrient sources and analysis of nutrient water-quality data, Apalachicola-Chattahoochee-Flint River basin, Georgia, Alabama, and Florida, 1972-90
Elizabeth A. Frick, Gary R. Buell, Evelyn H. Hopkins
1996, Water-Resources Investigations Report 96-4101
In 1991, the U.S. Geological Survey began full-scale implementation of the National Water-Quality Assessment (NAWQA) program. One of the initial tasks of the NAWQA program is to compile and evaluate existing data from individual study units. Available nutrient data from 1972 through 1990 water years were used to estimate nutrient...
Detailed study of selenium and other constituents in water, bottom sediment, soil, alfalfa, and biota associated with irrigation drainage in the Uncompahgre Project area and in the Grand Valley, west-central Colorado, 1991-93
D. L. Butler, W. G. Wright, K. C. Stewart, B. C. Osmundson, R. P. Krueger, D.W. Crabtree
1996, Water-Resources Investigations Report 96-4138
In 1985, the U.S. Department of the Interior began a program to study the effects of irrigation drainage in the Western United States. These studies were done to determine whether irrigation drainage was causing problems related to human health, water quality, and fish and wildlife resources. Results of a study...
Quality of Wisconsin stormwater, 1989-94
Roger T. Bannerman, Andrew D. Legg, Steven R. Greb
1996, Open-File Report 96-458
Water-quality data were compiled from four urban stormwater monitoring projects conducted in Wisconsin between 1989 and 1994. These projects included monitoring in both storm-sewer pipes and urban streams. A total of 147 constitu ents were analyzed for in stormwater sampled from 10 storm-sewer pipes and four urban streams. Land uses...