Continuous tilt, strain, and magnetic field measurements near four earthquakes (ML = 3.6 to 3.8) on the San Andreas fault, California
M.J.S. Johnston, A.C. Jones, C.E. Mortensen, B.E. Smith
1978, Open-File Report 78-987
Four moderate earthquakes (M = 3.6 to 3.8) have occurred on the San Andreas fault in central California since October, 1977. These earthquakes are the first since 1974 to occur at this magnitude level within the array of tilt, strain, and magnetic instruments between Chalome (35.726N, 12.249 W) and San...
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...
A progress report on estuary modeling by the finite-element method
William G. Gray
1978, Open-File Report 78-479
Various schemes are investigated for finite-element modeling of two-dimensional surface-water flows. The first schemes investigated combine finite-element spatial discretization with split-step time stepping schemes that have been found useful in finite-difference computations. Because of the large number of numerical integrations performed in space and the large sparse matrices solved, these...
Mass movement and storms in the drainage basin of Redwood Creek, Humboldt County, California — A progress report
Deborah Reid Harden, Richard J. Janda, K. Michael Nolan
1978, Open-File Report 78-486
Numerous active landslides are clearly significant contributors to high sediment loads in the Redwood Creek basin. Field and aerial-photograph inspections indicate that large mass-movement features, such as earthflows and massive streamside debris slides, occur primarily in terrain underlain by unmetamorphosed or slightly metamorphosed sedimentary rocks. These features cannot account for...
Quantitative hydrogeology of the Upper Republican Natural Resources District, southwest Nebraska
Eric G. Lappala
1978, Water-Resources Investigations Report 78-38
Ground-water use for irrigation from the Ogallala Formation }'as in-creased rapidly in the Upper Republican Natural Resources District in southwest Nebraska. Water levels declined as much as 16 feet between 1952 and 1975. Discharge of the aquifer to streams was reduced by as much as 19 percent between 1967 and...
Unsteady solute-transport simulation in streamflow using a finite-difference model
Larry F. Land
1978, Water-Resources Investigations Report 78-18
This report documents a rather simple, general purpose, one-dimensional, one-parameter, mass-transport model for field use. The model assumes a well-mixed conservative solute that may be coming from an unsteady source and is moving in unsteady streamflow. The quantity of solute being transported is in the units of concentration. Results are...
Map showing anomalous bismuth distribution in stream sediment concentrates, Hillsboro and San Lorenzo quadrangles, exclusive of the Black Range Primitive Area, Sierra and Grant counties, New Mexico
K. C. Watts, H. V. Alminas, J. M. Nishi, W.C. Crim
1978, Miscellaneous Field Studies Map 900-K
This map shows the distribution of anomalous bismuth in the nonmagnetic (NM-1) sample fraction plotted on a base which includes sample localities, topography, and generalized geology modified from Hedlund (1975a, b). It is part of a series of maps for several metals that accompany this folio. Distributions of bismuth values...
Map showing anomalous tungsten and gold distribution in stream sediment concentrates, Hillsboro and San Lorenzo quadrangles exclusive of the Black Range Primitive Area, Sierra and Grant Counties, New Mexico
K. C. Watts, H. V. Alminas, J. M. Nishi, W.C. Crim
1978, Miscellaneous Field Studies Map 900-I
This map shows the distribution of anomalous tungsten in the two sample fractions, magnetic (M-1) and nonmagnetic (NM-1) gold in the nonmagnetic (NM-1) fraction; these are plotted on a base which includes sample localities, topography, and generalized geology modified from Hedlund (1975a, b). It is part of a series of...
Model evaluation of the hydrogeology of the Cypress Creek well field in west-central Florida
Paul D. Ryder
1978, Water-Resources Investigations Report 78-79
The Cypress Creek well field is being developed to help supply a rapidly growing population in west-central Florida. The ground-water system in the Cypress Creek well-field area consists of a surficial sand aquifer, a semiconfining clay layer ranging from 2 to 25 feet in thickness, and a sequence of carbonate...
Digital-model simulation of the glacial-outwash aquifer, Otter Creek-Dry Creek basin, Cortland County, New York
O. J. Cosner, J. F. Harsh
1978, Water-Resources Investigations Report 78-71
The city of Cortland, New York, and surrounding areas obtain water from the highly productive glacial-outwash aquifer underlying the Otter Creek-Dry Creek basin. Pumpage from the aquifer in 1976 was approximately 6.3 million gallons per day and is expected to increase as a result of population growth and urbanization. A...
Transport and dispersion of fluorescent tracer particles for the dune-bed condition, Atrisco Feeder Canal near Bernalillo, New Mexico
R. E. Rathbun, Vance C. Kennedy
1978, Professional Paper 1037
A fluorescent tracer technique was used to study the rates of transport and dispersion of sediment particles of various diameters and specific gravities for a dune-bed condition in an alluvial channel, Atrisco Feeder Canal near Bernalillo, N. Mex. The total transport rates of bed material measured by the steady-dilution and...
Gas-driven pump for ground-water samples
Donald C. Signor
1978, Water-Resources Investigations Report 78-72
Observation wells installed for artificial-recharge research and other wells used in different ground-water programs are frequently cased with small-diameter steel pipe. To obtain samples from these small-diameter wells in order to monitor water quality, and to calibrate solute-transport models, a small-diameter pump with unique operating characteristics is required that causes...
Hydrologic reconnaissance of the Fish Springs Flat area, Tooele, Juab and Millard counties, Utah
E.L. Bolke, C. T. Sumsion
1978, Open-File Report 78-312
The Fish Springs Flat area includes about 590 square miles (1,530 square kilometers) in western Utah. Total annual precipitation on the area averages about 7 inches (180 millimeters) and totals about 232,000 acre-feet (286 cubic hectometers). Fish Springs Wash is the major drainage in the area; and, along with numerous...
A rainfall-runoff modeling procedure for improving estimates of T-year (annual) floods for small drainage basins
Robert W. Lichty, Fred Liscum
1978, Water-Resources Investigations Report 78-7
Maps depicting the influence of a climatic factor, C, on the magnitude of synthetic T-year (annual) floods were prepared for a large portion of the eastern United States. The climatic factors were developed by regression analysis of flood data using a parametric rainfall-runoff model and long-term rainfall records. Map estimates...
Channel migration of the White River in the eastern Uinta Basin, Utah and Colorado
Antonio Jurado, Fred K. Fields
1978, IMAP 1087
The White River is the largest stream in the southeastern part of the Uinta Basin in Utah and Colorado. This map shows the changes that have occurred in the location of the main channel of the river from 1936 to 1974. The map indicated that certain reaches of the river...
Hydrologic analysis of the U.S. Bureau of Mines' underground oil-shale research-facility site, Piceance Creek Basin, Rio Blanco County, Colorado
R. H. Dale, John B. Weeks
1978, Water-Resources Investigations Report 78-28
The U.S. Bureau of Mines plans to develop an underground oil-shale research facility near the center of Piceance Creek basin in Colorado. The oil-shale zone, which is to be penetrated by a shaft, is overlain by 1,400 feet of sedimentary rocks, primarily sandstone and marlstone, consisting of two aquifers separated...
A statistical summary and listing of the spectrographic analyses of heavy mineral concentrate and conventional, sieved stream-sediment samples, Silver City area, New Mexico
K. C. Watts, J.R. Hassemer, D. F. Siems, J. M. Nishi
1978, Open-File Report 78-801
Geochemical sampling of a tier of eight 7 1/2-minute quadrangles bordered by latitudes 32° 45'and 33° 00' N. and longitudes 108° 00' and 108° 30' W. was begun in the fall of 1974 and continued seasonally until completion in the fall of 1976. These quadrangles are in southwest New Mexico...
Computer program for a generic western coal region simulated model developed to investigate potential applications of system dynamics modeling to the EIS process
R. K. Mark, D. S. Harwood, Richard R. Doell, E. B. Newman
1978, Open-File Report 78-321
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...
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...
Playback Station #2 for Cal Net and 5-day-recorder tapes
Jerry P. Eaton
1978, Open-File Report 78-542
A second system (Playback Station #2) has been set up to play back Cal Net 1" tapes and 5-day-recorder 1/2" tapes. As with the first playback system (Playback Station #1) the tapes are played back on a Bell and Howell VR3700B tape deck and the records are written out on...
Transit losses and traveltimes of reservoir releases along the Arkansas River from Pueblo Reservoir to John Martin Reservoir, southeastern Colorado
Russell K. Livingston
1978, Water-Resources Investigations Report 78-75
The need for accurate information regarding the transit losses and traveltimes associated with releases from Pueblo Reservoir has been stimulated by construction of the U.S. Bureau of Reclamation's Fryingpan-Arkansas Project and a proposed winter-water storage program in Pueblo Reservoir. To meet this need, the U.S. Geological Survey, in cooperation with...
A conceptual ecological model for Chesapeake Bay
Katherine A. Green
1978, FWS/OBS 78/69
Determination of peak discharge from rainfall data for urbanized basins, Wichita, Kansas
C.O. Peek, P. R. Jordan
1978, Open-File Report 78-974
Rainfall and runoff data from urbanized drainage basins in the Wichita area, Kansas, were used to evaluate the Soil Conservation Service synthetichydrograph method of computing flood hydrographsfrom rainfall data. The method was tested on six basins where the impervious surface ranged from 11 percent on the least urbanized basin to...
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...
