Susceptibility of coastal plain aquifers to contamination, Fairfax County, Virginia; a computer composite map
Richard H. Johnston, J. Nicholas Van Driel
1978, Open-File Report 78-265
A map is presented that classifies the Coastal Plain of Fairfax County, Virginia according to the susceptibility of the principal sand aquifers to contamination from surface sources. The following classification is used: (1) areas where leachate can readily enter the principal sand aquifers, (2) areas offering great natural protection against...
Geology of the uranium prospect at Camp Smith, New York, with a new model for the formation of uranium deposits in metamorphosed submarine volcanogenic rocks
Richard I. Grauch
1978, Open-File Report 78-949
Uraninite of Precambrian age occurs locally in and around a massive sulfide deposit at Camp Smith, Westchester and Putnam Counties, New York. The host rocks are believed to be part of a sequence of marine sediments and submarine volcanogenic rocks that were metamorphosed to leucogneisses, amphibolites, and amphoholite gneisses in...
Characteristics of the Landsat Multispectral Data System
James V. Taranik
1978, Open-File Report 78-187
Landsat satellites were launched into orbit in 1972 and 1975. Additional Landsat satellites are planned for launch in 1978 and 1981. The satellites orbit the Earth at an altitude of approximately 900 km and each can obtain repetitive coverage of cloud-free areas every 18 days. A sun-synchronous orbit is used...
A table of photopeaks useful in nuclear geophysics
Allan B. Tanner, Frank E. Senftle
1978, Open-File Report 78-531
The table lists full-energy, single-escape, and double-escape photopeak energies corresponding to about 1800 x- and gamma rays derived from natural radioactivity, X-ray fluorescence, neutron reactions, and induced radioactivity. Photon lines have been selected on the basis of their importance in borehole logging by nuclear methods. The mode of production of...
Contact-metasomatic magnetite deposit, Medfra Quadrangle, Alaska
M.L. Throckmorton, William Wallace Patton
1978, Open-File Report 78-26
A small contact-metasomatic magnetite deposit was discovered in the Medfra quadrangle, Alaska, in 1976. It occurs at the contact between a Cretaceous or early Tertiary quartz monzonite stock and Paleozoic limestone and dolomite. The ore is a magnetite-clinohumite-hematite rock that contains up to 60 volume percent magnetite and 76 weight...
Mineral resources of the Charles Sheldon wilderness study area, Humboldt and Washoe Counties, Nevada, and Lake and Harney Counties, Oregon
John B. Cathrall, R. C. Greene, Donald Plouff, D. F. Siems, G. L. Crenshaw, E.F. Cooley, E.T. Techek, F.J. Johnson, M. D. Conyac
1978, Open-File Report 78-1002
A mineral survey of the Charles Sheldon wilderness study area, located in Humboldt and Washoe Counties, Nevada, and Lake and Harney Counties, Oregon was conducted in 1974 and 1975 (fig. 1A, 1B, 1C). The mineral resource potential was evaluated by geological, geochemical, and geophysical studies by the U.S. Geological Survey,...
Hydraulic geometry of river cross sections; theory of minimum variance
Garnett P. Williams
1978, Professional Paper 1029
This study deals with the rates at which mean velocity, mean depth, and water-surface width increase with water discharge at a cross section on an alluvial stream. Such relations often follow power laws, the exponents in which are called hydraulic exponents. The Langbein (1964) minimum-variance theory is examined in regard...
Tsunami microprocessor tide system
Harold Clark, Gary L. Heckendorn
1978, Open-File Report 78-95
A Tsunami Microprocessor Tide System was developed to replace the Advanced Tsunami Tide System. The use of microprocessor based systems will reduce manpower and hardware costs from $4,000 per advanced system to $400 per microprocessor system. In addition to the cost reduction; the capacity, capability, and flexibility of the microprocessor...
Potential effects of deep-well waste disposal in western New York
Roger Milton Waller, John T. Turk, Robert James Dingman
1978, Professional Paper 1053
Mathematical and laboratory models were used to observe, respectively, the hydraulic and chemical reactions that may take place during proposed injection of a highly acidic, iron-rich waste pickle liquor into a deep waste-disposal well in western New York. Field temperature and pressure conditions were simulated in the tests. Hydraulic pressure...
Computer modeling of ground-water availability in the Pootatuck River Valley, Newtown, Connecticut
F.P. Haeni, Elinor H. Handman
1978, Water-Resources Investigations Report 78-77
A hydrologic analysis of the stratified drift in Newtown, Conn., based on available data, test drilling, seismic refraction profiling, and the stream-aquifer connection was performed using a digital computer model. Simulated pumping indicates that a total of 4.0 million gallons of water per day (Mgal/d) can be withdrawn from the...
Eolian sand and interbedded organic horizons at Kealok Creek on the Arctic Coastal Plain of Alaska: possible regional implications
L. David Carter, S.W. Robinson
1978, Open-File Report 78-320
Eolian sand has long been recognized as a widespread but minor facies of supposedly dominantly marine sediments of the Gubik Formation of the Arctic Coastal Plain (Smith and Mertie, 1930; Black, 1951 and 1964; O'Sullivan, 1961). Descriptions of eolian landforms of the coastal plain have been published by several authors,...
Flood profiles for Peace River, south-central Florida
W. R. Murphy Jr., K.M. Hammett, C. V. Reeter
1978, Water-Resources Investigations Report 78-57
This report presents flood heights and profiles for a 70-mile reach of Peace River from Bartow to Arcadia, Fla. The flood heights were calculated using the U.S. Geological Survey step-backwater model. Profiles were prepared for floods having expected recurrence intervals of 2, 2.33, 5, 10, 25, 50, 100, 200, and...
Recent and projected changes in Dead Sea level and effects on mineral production from the sea
Stanley P. Sauer
1978, Open-File Report 78-176
Hydrologic data for the Dead Sea area were reviewed to assess the probable magnitude and rate of change of the water level of the Dead Sea. Historical average annual Dead Sea levels range from a minimum of 399.4 meters below sea level in about 1818 to a maximum of 388.6...
Terrain-analysis procedures for modeling radar backscatter
Gerald G. Schaber, Richard J. Pike, Graydon Lennis Berlin
1978, Open-File Report 79-1088
The collection and analysis of detailed information on the surface of natural terrain are important aspects of radar-backscattering modeling. Radar is especially sensitive to surface-relief changes in the millimeter- to-decimeter scale four conventional K-band (~1-cm wavelength) to L-band (~25-cm wavelength) radar systems. Surface roughness statistics that characterize these changes in...
Users guide for distributed routing rainfall-runoff model
D.R. Dawdy, John C. Schaake Jr., William M. Alley
1978, Water-Resources Investigations Report 78-90
A computer program of a watershed model for routing urban flood discharges through a branched system of pipes or natural channels using rainfall as input has been developed and documented. The model combines soil-moisture-accounting and rainfall-excess components developed by Dawdy and others (1972) with the kinematic-wave routing method presented by...
Summary appraisals of the Nation's ground-water resources; Alaska
Chester Zenone, Gary S. Anderson
1978, Professional Paper 813-P
Alaska has enormous surface-water resources, but many of the streams are frozen for most of the year and most contain glacial silt that makes them unacceptable for human use. These factors lend special significance to ground water as a water-supply source, even though perennially frozen ground (permafrost) profoundly modifies ground-water...
Well-response model of the confined area, Bunker Hill ground-water basin, San Bernardino County, California
Timothy J. Durbin, Charles O. Morgan
1978, Water-Resources Investigations Report 77-129
The Bunker Hill ground-water basin, in the vicinity of San Bernardino, Calif., is being artificially recharged with imported water. Current and future artificial recharge of the basin may cause the potentiometric surface in an area of confined ground water to rise above land surface and water to flow from uncapped...
Two-dimensional and three-dimensional digital flow models of the Salinas Valley ground-water basin, California
T. J. Durbin, G.W. Kapple, J. R. Freckleton
1978, Water-Resources Investigations Report 78-113
The Salinas Valley ground-water basin is in central coastal California. The ground-water basin extends from Monterey Bay southeastward along the Salinas River to San Ardo, a distance of about 70 miles, and has a maximum thickness of about 2,000 feet. Annual recharge to the ground-water basin, which is derived mostly...
Preliminary catalog of earthquakes in southern California, October 1976-September 1977
Gary S. Fuis, J.H. Whitcomb, C.E. Johnson, D.J. Jenkins, K.J. Ritcher, A.C. Blanchard, S.A. Fischer, B.A. Reed
1978, Open-File Report 78-672
There has been a continuing demand on the part of many persons, institutions, commercial companies, government agencies, and so forth for up-to-date maps and tables of earthquakes in southern California. Unfortunately, final catalogs of earthquakes such as Hileman and others (1973), Hill and others (1975a), and Friedman and others (1976)...
Numerical modeling of liquid geothermal systems
M.L. Sorey
1978, Professional Paper 1044-D
No abstract available....
A preliminary study of the Santa Barbara, California, earthquake of August 13, 1978, and its major aftershocks
William Hung Kan Lee, C.E. Johnson, T.L. Henyey, R.L. Yerkes
1978, Circular 797
The ML5.1 Santa Barbara earthquake of August 13, 1978 occurred at lat 34' 22.2'N., long 119 ? 43.0' 4 km south of Santa Barbara, Calif. at a depth of 12.5 km in the northeast Santa Barbara Channel, part of the western Transverse Ranges geomorphic-structural province. This part of the province...
FRISK: computer program for seismic risk analysis using faults as earthquake sources
Robin K. McGuire
1978, Open-File Report 78-1007
This computer program makes probabilistic seismic hazard calculations at sites affected by earthquakes occurring on faults which are defined by the user as a series of line segments. The length of rupture of the fault as a function of earthquake magnitude is accounted for, and ground motion estimates at the...
Direct solution algorithm for the two-dimensional ground-water flow model
S. P. Larson
1978, Open-File Report 79-202
Summary appraisals of the nation's ground-water resources – Great Lakes region
William G. Weist Jr.
1978, Professional Paper 813-J
The Great Lakes Regions, as a whole, has abundant supplies of water. Nearly 805,000 billion cubic feet of water is contained in the Great Lakes. An additional 35,000 billion cubic feet of potable ground water is available from storage in the region. Estimated ground-water discharge to the streams and lakes...
A computer program designed to produce tables from alphanumeric data
Jennie L. Ridgley, Robert Wayne Schnabel
1978, Open-File Report 78-875
This program is designed to produce tables from alphanumeric data. Each line of data that appears in the table is entered into a data file as a single line of data. Where necessary, a predetermined delimiter is added to break up the data into column data. The program can process...
