Experimental studies in natural groundwater-recharge dynamics: The analysis of observed recharge events
M. Sophocleous, C. A. Perry
1985, Journal of Hydrology (81) 297-332
The amounts and time distribution of groundwater recharge from precipitation over an approximately 19-month period were investigated at two instrumented sites in south-central Kansas. Precipitation and evapotranspiration sequences, soil-moisture profiles and storage changes, water fluxes in the unsaturated zone and hydraulic gradients in the saturated zone at various depths, soil...
Hydraulic gradient control for groundwater contaminant removal
Atwood D. Fisher, S.M. Gorelick
1985, Journal of Hydrology (76) 85-106
The Rocky Mountain Arsenal near Denver, Colorado, U.S.A., is used as a realistic setting for a hypothetical test of a procedure that plans the hydraulic stabilization and removal of a groundwater contaminant plume. A two-stage planning procedure successfully selects the best wells and their optimal pumping/recharge schedules to contain the...
Salt-water-freshwater transient upconing - An implicit boundary-element solution
M. Kemblowski
1985, Journal of Hydrology (78) 35-47
The boundary-element method is used to solve the set of partial differential equations describing the flow of salt water and fresh water separated by a sharp interface in the vertical plane. In order to improve the accuracy and stability of the numerical solution, a new implicit scheme was developed for...
Quantitative analysis of saltwater-freshwater relationships in groundwater systems-A historical perspective
T. E. Reilly, A.S. Goodman
1985, Journal of Hydrology (80) 125-160
Although much progress has been made toward the mathematical description of saltwater-freshwater relationships in groundwater systems since the late 19th century, the advective and dispersive mechanisms involved are still incompletely understood. This article documents the major historical advances in this subject and summarizes the major direction of current studies. From...
Evaluating the hydraulic effects of changes in aquifer elevation using curvilinear coordinates
E. Weiss
1985, Journal of Hydrology (81) 253-275
The groundwater flow equation is written in curvilinear coordinates whose coordinate surfaces coincide with the top and bottom surfaces of folded layers of aquifers. The coordinates are general enough for these surfaces to coincide for almost all groundwater systems. The terms of the finite-difference approximation for the flow equation can...
Quaternary sedimentation of the Alaskan Beaufort shelf: Influence of regional tectonics, fluctuating sea levels, and glacial sediment sources
David A. Dinter
1985, Tectonophysics (114) 133-161
The offshore stratigraphy of the Quaternary Gubik Formation of Arctic Alaska has been studied on high-resolution seismic profiles with a maximum sub-seafloor penetration of about 100 m. In general, marine transgressive subunits of the Gubik Formation are wedge-shaped on the shelf, thickening slightly seaward to the shelf break, beyond which...
Determination of gold, indium, tellurium and thallium in the same sample digest of geological materials by atomic-absorption spectroscopy and two-step solvent extraction
A.E. Hubert, T. T. Chao
1985, Talanta (32) 568-570
A rock, soil, or stream-sediment sample is decomposed with hydrofluoric acid, aqua regia, and hydrobromic acid-bromine solution. Gold, thallium, indium and tellurium are separated and concentrated from the sample digest by a two-step MIBK extraction at two concentrations of hydrobromic add. Gold and thallium are first extracted from 0.1M hydrobromic acid medium,...
A rapid method for determining tin and molybdenum in geological samples by flame atomic-absorption spectroscopy
Eric P. Welsch
1985, Talanta (32) 996-998
The proposed method uses a lithium metaborate fusion, dissolution of the fusion bead in 15% vv hydrochloric acid, extraction into a 4% solution of trioctylphosphine oxide in methyl isobutyl ketone, and aspiration into a nitrous oxide-acetylene flame. The limits of detection for tin and molybdenum are 1.0 and 0.5 ppm,...
Post-Eruption Changes in Channel Geometry of Streams in the Toutle River Drainage Basin, 1980-82, Mount St. Helens, Washington
D. F. Meyer, K. Michael Nolan, J.E. Dodge
1985, Open-File Report 85-412
The May 18, 1980, eruption of Mount St. Helens, Washington, generated a debris avalanche, lateral blast, lahars, and tephra deposits that altered mainstem and tributary channels within the Toutle River drainage basin. Channel cross sections were monumented and surveyed on North Fork Toutle River and its tributaries, on South Fork...
Water resources data, Michigan, water year 1984
John B. Miller, John L. Oberg, Theodore Sieger Jr.
1985, Water Data Report MI-84-1
Water resources data for the 1984 water year for Michigan consist of records of stage, discharge, and water quality of streams; stage, contents, and water quality of lakes and reservoirs; and water levels and water temperature of ground water. This report contains discharge records for 142 gaging stations; stage only...
Hydrology of area 58, northern Great Plains and Rocky Mountain coal provinces, Colorado and Utah
T.H. Chaney, T.D. Brooks, Gerhard Kuhn
1985, Open-File Report 85-479
Proceedings of workshop XXVIII on the Borah Peak, Idaho earthquake
Ross S. Stein, Robert C. Bucknam, editor(s)
1985, Open-File Report 85-290-A
A large earthquake leaves clues of its nature that can be interpreted only by a diverse group of scientists. We cannot hope to form a coherent picture of the Borah Peak shock, a rare Great Basin event, without listening to each other and reflecting on the historical and geological record...
Maps showing distribution of copper in heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1985, Miscellaneous Field Studies Map 1246-F
These maps are part of a folio of maps of the Richfield 1° x 2 ° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other publications in this folio are listed in the selected references.Located in west-central Utah, the Richfield quadrangle covers the eastern part of the...
Maps showing distribution of tungsten in heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1985, Miscellaneous Field Studies Map 1246-J
These maps are part of a folio of maps of the Richfield 1° x 2 ° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other publications in this folio are listed in the selected references.Located in west-central Utah, the Richfield quadrangle covers the eastern part of the...
Maps showing distribution of thorium in heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1985, Miscellaneous Field Studies Map 1246-H
These maps are part of a folio of maps of the Richfield 1° x 2 ° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other publications in this folio are listed in the selected references.Located in west-central Utah, the Richfield quadrangle covers the eastern part of the...
Maps showing distribution of tin in heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1985, Miscellaneous Field Studies Map 1246-I
These maps are part of a folio of maps of the Richfield 1° x 2 ° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other publications in this folio are listed in the selected references.Located in west-central Utah, the Richfield quadrangle covers the eastern part of the...
Maps showing distribution of lead in heavy-mineral concentrates, Richfield 1° x 2° quadrangle, Utah
William R. Miller, Jerry M. Motooka, John B. McHugh
1985, Miscellaneous Field Studies Map 1246-G
These maps are part of a folio of maps of the Richfield 1° x 2 ° quadrangle, Utah, prepared under the Conterminuous United States Mineral Assessment Program. Other publications in this folio are listed in the selected references.Located in west-central Utah, the Richfield quadrangle covers the eastern part of the...
Cooperative research in the geosciences between the U.S. Geological Survey and the Central Office of Geology, Hungary during 1978-84; proceedings of a joint conference, October 1-3, 1984, Budapest, Hungary
Oszkar Adam, Kozponti Foldtani Hivatal, Eva Kilenyi
P.E. Teleki, editor(s)
1985, Open-File Report 85-291
Reconnaissance geologic map of the Mt. Blackburn Quadrangle, Transantarctic Mountains, Antarctica
Edmund Stump, J.H. Smit, Stephen Self
1985, Antarctic Map 12
Minutes of the National Earthquake Prediction Evaluation Council, July 26-27, 1985, Menlo Park, California
C.F. Shearer
1985, Open-File Report 85-754
Bentonite and fuller's earth resources of the United States
John W. Hosterman
1985, Mineral Investigations Resource Map 92
Distribution and geologic relations of fault systems in the vicinity of the central Transverse Ranges, Southern California
J. C. Matti, D. M. Morton, B. F. Cox
1985, Open-File Report 85-365
No abstract available. ...
Ground-water quality data for Oklahoma; 1982-84
D. M. Ferree
1985, Open-File Report 85-417
The U.S. Geological Survey has collected data on Oklahoma's ground-water resources since 1934. Most of these data were collected as part of specific ground-water studies conducted in cooperation with various federal, state, and local agencies. Ground-water quality data, as well as data on construction, yield, water levels, and other physical...
Geologic map of the Mt. Ellen-Blue Hills Wilderness Study Area and Bull Mountain Study Area, Garfield and Wayne counties, Utah
C. G. Patterson, C. S. Bromfield, R. F. Dubiel, P. P. Orkild, Fred Peterson
1985, Miscellaneous Field Studies Map 1756-B
Selected trace-element data for streams in the southern Yampa River basin, northwestern Colorado
W.S. Maura
1985, Open-File Report 85-192
Increases in coal mining in northwestern Colorado have increased concerns about the impact of mining on the chemical quality of surface water. One area of particular concern is in the southern part of the Yampa River basin. To identify the possible changes in water quality produced by mining in this...
