Eruptive history, petrology, and petrogenesis of the Joe Lott Tuff Member of the Mount Belknap Volcanics, Marysvale volcanic field, west-central Utah
Karin E. Budding
1982, Open-File Report 82-891
The Joe Lott Tuff Member of the Mount Belknap Volcanics is the largest rhyolitic ash-flow tuff sheet in the Marysvale volcanic field. It was erupted 19 m.y. ago, shortly after the changeover from intermediate-composition calc-alkalic volcanism to bimodal basalt-rhyolite volcanism. Eruption of the tuff resulted in the formation of the...
Evapotranspiration of applied water, Central Valley, California, 1957-78
Alex K. Williamson
1982, Water-Resources Investigations Report 81-45
In the Central Valley, Calif., where 57% of the 20,000 square miles of land is irrigated, ground-water recharge from agricultural lands is an important input to digital simulation models of ground-water flow. Several methods of calculating recharge were explored for the Central Valley Aquifer Project and a simplified water budget...
Preliminary evaluation of the ground-water-flow system in the Twin Cities Metropolitan area, Minnesota
John H. Guswa, Donald I. Siegel, Daniel C. Gillies
1982, Water-Resources Investigations Report 82-44
A preliminary quasi-three-dimensional finite-difference ground-water-flow model of the seven-county Twin Cities Metropolitan area was constructed and used to evaluate parameter sensitivity and adequacy of available data. Fourteen geologic units that underlie the study area were grouped into nine hydr,bgeologic units and were incorporated into a five-layer model. The layers in...
Digital-transport model study of the potential effects of coal-resource development on the ground-water system in the Yampa River Basin, Moffat and Routt Counties, Colorado
James W. Warner, Robert H. Dale
1982, Water-Resources Investigations Report 81-15
Model modifications for simulation of flow through stratified rocks in eastern Ohio
J. O. Helgesen, A. C. Razem, S. P. Larson
1982, Water-Resources Investigations Report 82-4019
A quasi three-dimensional groundwater flow model is being used as part of a study to determine impacts of coal-strip mining on local hydrologic systems. Modifications to the model were necessary to simulate local hydrologic conditions properly. Perched water tables required that the method of calculating vertical flow rate be changed....
Water-quality assessment of the Merced River, California
Stephen K. Sorenson
1982, Open-File Report 82-450
The Merced River and its major tributaries have been subject of water-quality and water-quantity studies by local, State, and Federal agencies since before 1900. Data have been compiled and analyzed, and even though water-quality problems exist in the basin, the water generally is of good quality for most of the...
Depth and temperature of permafrost on the Alaskan Arctic Slope; preliminary results
Arthur H. Lachenbruch, J.H. Sass, L.A. Lawver, M.C. Brewer, T.H. Moses
1982, Open-File Report 82-1039
As permafrost is defined by its temperature, the only way to determine its depth is to monitor the return to equilibrium of temperatures in boreholes that penetrate permafrost. Such measurements are under way in 25 wells on the Alaskan Arctic Slope; 21 are in Naval Petroleum Reserve Alaska (NPRA), and...
Arizona Vegetation Resource Inventory (AVRI) accuracy assessment
John Szajgin, L. R. Pettinger, D.S. Linden, D.O. Ohlen
1982, Open-File Report 82-814
A quantitative accuracy assessment was performed for the vegetation classification map produced as part of the Arizona Vegetation Resource Inventory (AVRI) project. This project was a cooperative effort between the Bureau of Land Management (BLM) and the Earth Resources Observation Systems (EROS) Data Center. The objective of the accuracy assessment...
Two-dimensional digital ground-water model of the Memphis Sand and equivalent units, Tennessee,Arkansas,Mississippi
J. V. Brahana
1982, Open-File Report 82-99
Ground-water resources of the White River basin, Hamilton and Tipton Counties, Indiana
Leslie D. Arihood
1982, Water-Resources Investigations Report 82-48
An analysis of the ground-water resources of the Hamilton and Tipton Counties was based on data from about 1,900 well logs, 125 water levels in 125 wells, streamflow measurements at 57 sites, and municipal- and industrial-pumpage records. These data were used to map the flow system and construct a three-dimensional...
An alternative hypothesis for sink development above salt cavities in the Detroit area
Daniel Stump, A.S. Nieto, J. R. Ege
1982, Open-File Report 82-297
Subsidence and sink formation resulting from brining operations in the Windsor-Detroit area include the 1954 sink at the Canadian Salt Company brine field near Windsor, Ontario, and the 1971 sinks at the BASF Wyandotte Corporation brine field at Grosse Ile, Mich. Earlier investigations into both occurrences concluded that the mechanism...
Ground-water resources of the White River basin, Delaware County, Indiana
Leslie D. Arihood, Wayne W. Lapham
1982, Water-Resources Investigations Report 82-47
The ground-water resources of the White River basin in and near Delaware County, Indiana, were investigated by mapping the aquifers, calculating their hydraulic properties, determining the distribution of potentiometric head, and determining some of the components of the ground-water budget from data collected in the field. This information was used...
Methodology for hydrologic evaluation of a potential surface mine: Loblolly Branch basin, Tuscaloosa County, Alabama
Lynn M. Shown, D. G. Frickel, R.F. Miller, F.A. Branson
1982, Water-Resources Investigations Report 82-50
Methodology for evaluating premining hydrology and postmining effects of mining and reclamation on the hydrology of an area is presented for a potential mine-permit area of 1,680 acres in the Warrior Coal Field, northwestern Alabama.Information is included on climate, geology, soil-water relations, vegetation, surface water, ground water, and quality of...
Three-dimensional mathematical model for simulating the hydrologic system in the Piceance basin, Colorado
J.O. Taylor
1982, Open-File Report 82-637
Preliminary projections of the effects of chloride-control structures on the Quaternary aquifer at Great Salt Plains, Oklahoma
J.E. Reed
1982, Water-Resources Investigations Report 80-120
About 1,200 tons of chloride per day are added to the salt load of the Salt Fork Arkansas River at Great Salt Plains Lake.from brine discharge from the rocks of Permian age in the vicinity of the lake. The U.S. Army Corps of Engineers has planned a chloride-control project. The...
Estimating peak flow characteristics at ungaged sites by ridge regression
Gary D. Tasker
1982, Open-File Report 82-333
A regression simulation model, is combined with a multisite streamflow generator to simulate a regional regression of 50-year peak discharge against a set of basin characteristics. Monte Carlo experiments are used to compare the unbiased ordinary lease squares parameter estimator with Hoerl and Kennard's (1970a) ridge estimator in which the...
FLOWCHART; a computer program for plotting flowcharts
Bernice Bender
1982, Open-File Report 82-999
The computer program FLOWCHART can be used to very quickly and easily produce flowcharts of high quality for publication. FLOWCHART centers each element or block of text that it processes on one of a set of (imaginary) vertical lines. It can enclose a text block in a rectangle, circle or...
Near-station terrain corrections for gravity data by a surface-integral technique
M. E. Gettings
1982, Open-File Report 82-1045
A new method of computing gravity terrain corrections by use of a digitizer and digital computer can result in substantial savings in the time and manual labor required to perform such corrections by conventional manual ring-chart techniques. The method is typically applied to estimate terrain effects for topography near the...
Aeromagnetic measurements in the Cascade Range and Modoc Plateau of northern California; report on work done from June 1, 1980, to November 30, 1980
Richard Couch, Michael Gemperle
1982, Open-File Report 82-932
Aeromagnetic measurements made along flightlines oriented east- west and spaced at 1.6-km intervals and along lines oriented north- south and spaced at 8-km intervals, over approximately 30,000 square km of northern California, exhibit crossing errors of less than 5 nanoTeslas. The measurements show short-wavelength magnetic anomalies associated with near-surface volcanics over and...
Progress report to the Arkansas State Highway and Transportation Department, year ending September 30, 1981
R.C. Gilstrap, T.E. Lamb
1982, Open-File Report 82-97
The objectives of the cooperative program with the Arkansas State Highway and Transportation Department are described. Accomplishments within the program are summarized and reports are listed. The accomplishments include operation of a crest-stage station network, modeling of rainfall-runoff station data, publication of drainage-area reports for all major river basins in...
Continuity equation model of the predicted drastic retreat of Columbia Glacier, Alaska
Lowell A. Rasmussen, M. F. Meier
1982, Professional Paper 1258-A
Mineral resource potential map of the Muddy Mountains Wilderness Study Area, Clark County, Nevada
Robert G. Bohannon, Andrew M. Leszcykowski, Leon E. Esparza, Clayton M. Rumsey
1982, Miscellaneous Field Studies Map 1458-C
The Muddy Mountains Wilderness Study Area (WSA 050-0229), Clark County, Nevada, has a high potential for mineral deposits of calcium borates and lithium. The known and potential mineral deposits are concentrated in the east-central and south-central parts of the study area (see map). Zeolites (in particular clinoptilolite) are present in...
A digital-computer model of the Big Sioux aquifer in Minnehaha County, South Dakota
N.C. Koch
1982, Water-Resources Investigations Report 82-4064
A finite-difference digital model was used to simulate steady-state conditions of the Big Sioux aquifer in Minnehaha County. Average water levels and average base flow discharge (4.9 cu ft/s) of the Big Sioux River were based on data from 1970 through 1979. The computer model was calibrated for transient conditions...
Habitat Suitability Index Models: Juvenile spot
Robert R. Stickney, Michael L. Cuenco
1982, FWS/OBS 82/10.20
A review and synthesis of existing information were used to develop estuarine habitat models for juvenile spot (Leiostomus xanthurus). The models are scaled to produce an index of habitat suitability between 0 (unsuitable habitat) to 1 (optimally suitable habitat) for estuarine areas of the continental United States. Habitat suitability indexes...
Habitat Suitability Index Models: Fox squirrel
Arthur W. Allen
1982, FWS/OBS 82/10.18
The fox squirrel (Sciurus niger) is the largest of the North American tree squirrels. The species is widely distributed throughout eastern North American and has been introduced in many portions of the West (Wright 1979). Fox squirrels also have expanded their range westward through utilization of gallery forest habitats along...
