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Page 4621, results 115501 - 115525

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Water resources data, Pennsylvania, water year 1986. Volume 1: Delaware River Basin
J.R. Kolva, T.E. White, L.D. Cecil, R.L. Druther
1988, Water Data Report PA-86-1
Water resources data for the 1986 water year for Pennsylvania consist of records of discharge and water quality of streams; contents and elevations of lakes and reservoirs; and water levels and water quality of ground-water wells. This report, Volume 1, includes records from the Delaware River basins. Specifically, it contains:...
Hydrology and ecology of the Apalachicola River, Florida : a summary of the river quality assessment
John F. Elder, Sherron D. Flagg, Harold C. Mattraw Jr.
1988, Water Supply Paper 2196-D
During 1979-81, the U.S. Geological Survey conducted a large-scale study of the Apalachicola River in northwest Florida, the largest and one of the most economically important rivers in the State. Termed the Apalachicola River Quality Assessment, the study emphasized interrelations among hydrodynamics, the flood-plain forest, and the nutrient-detritus flow through...
International strategic minerals inventory summary report; titanium
R.R. Towner, J.M. Gray, L.M. Porter
1988, Circular 930-G
Ilmenite and rutile are currently the most important titanium-bearing minerals, although anatase may be important in the future. Both ilmenite and rutile occur in hard-rock and placer deposits, but at present all rutile production and about half of the ilmenite production are from placer deposits. Anatase occurs in laterite deposits...
Leachate migration from an in-situ oil-shale retort near Rock Springs, Wyoming
Kent C. Glover
1988, Water Supply Paper 2322
Hydrogeologic factors influencing leachate movement from an in-situ oil-shale retort near Rock Springs, Wyoming, were investigated through models of ground-water flow and solute transport. Leachate, indicated by the conservative ion thiocyanate, has been observed ? mile downgradient from the retort. The contaminated aquifer is part of the Green River Formation...
Bottom sediments and nutrients in the tidal Potomac system, Maryland and Virginia
Jerry L. Glenn
1988, Water Supply Paper 2234-F
The characteristics and distributions of near-surface bottom sediments and of nutrients in the sediments provide information on modern sediment and nutrient sources, sedimentation environments, and geochemical reactions in the tidal Potomac system, Maryland and Virginia. This information is fundamental to an improved understanding of sedimentation and eutrophication problems in the...
Tritium migration from a low-level radioactive-waste disposal site near Chicago, Illinois
J.R. Nicholas, R. W. Healy
1988, Water Supply Paper 2333
This paper describes the results of a study to determine the geologic and hydrologic factors that control migration of tritium from a closed, low-level radioactive-waste disposal site. The disposal site, which operated from 1943 to mid1949, contains waste generated by research activities at the world's first nuclear reactors. Tritium has...
Geologic and hydrologic investigations of a potential nuclear waste disposal site at Yucca Mountain, southern Nevada
Michael D. Carr, James C. Yount, editor(s)
1988, Bulletin 1790
Crustal velocity sections based on two seismic-refraction profiles are presented for the area west of Yucca Mountain, Nye County, Nevada. The Crater Flat profile is interpreted in terms of six velocity layers ranging from 1.5 to 6.1 km/s. Interpretation of the Beatty profile reveals an escarpment near the northeast edge...