Simulation of lake ice and its effect on the late-Pleistocene evaporation rate of Lake Lahontan
S. W. Hostetler
1991, Climate Dynamics (6) 43-48
A model of lake ice was coupled with a model of lake temperature and evaporation to assess the possible effect of ice cover on the late-Pleistocene evaporation rate of Lake Lahontan. The simulations were done using a data set based on proxy temperature indicators and features of the simulated late-Pleistocene...
Analysis of glacier facies using satellite techniques
R.S. Williams Jr., D.K. Hall, C.S. Benson
1991, Journal of Glaciology (37) 120-128
The different snow and ice types on a glacier may be subdivided according to the glacier-facies concept. The surficial expression of some facies may be detected at the end of the balance year by the use of visible and near-infrared image data from the Landsat multispectral scanner...
Visible and near-infrared (0.4-2.5 μm) reflectance spectra of playa evaporite minerals
James K. Crowley
1991, Journal of Geophysical Research (96) 16231-16240
Visible and near-infrared (VNIR; 0.4–2.4 μm) reflectance spectra were recorded for 35 saline minerals that represent the wide range of mineral and brine chemical compositions found in playa evaporite settings. The spectra show that many of the saline minerals exhibit diagnostic near-infrared absorption bands, chiefly attributable to vibrations of hydrogen-bonded...
Evaluation of a mark-recapture method for estimating mortality and migration rates of stratified populations
R.M. Dorazio, P.J. Rago
1991, Canadian Journal of Fisheries and Aquatic Sciences (48) 254-260
We simulated mark–recapture experiments to evaluate a method for estimating fishing mortality and migration rates of populations stratified at release and recovery. When fish released in two or more strata were recovered from different recapture strata in nearly the same proportions, conditional recapture probabilities were estimated outside the [0, 1]...
S-layer positive motile aeromonads isolated from channel catfish
L.A. Ford
1991, Journal of Wildlife Diseases (27) 557-561
Motile aeromonads are ubiquitous aquatic bacteria that can cause motile aeromonad septicemia (MAS), a disease which affects channel catfish and can produce significant economic loss. Motile aeromonads isolated from commercially-raised channel catfish were screened for production of S-layer protein in order to evaluate...
The effects of noise due to random undetected tilts and paleosecular variation on regional paleomagnetic directions
G.J. Calderone, R.F. Butler
1991, Journal of Geophysical Research (96) 3973-3977
Random tilting of a single paleomagnetic vector produces a distribution of vectors which is not rotationally symmetric about the original vector and therefore not Fisherian. Monte Carlo simulations were performed on two types of vector distributions: (1) distributions of vectors formed by perturbing a single...
Integration of remote sensing and GIS: Data and data access
M. Ehlers, D. D. Greenlee, T. Smith, J. Star
1991, Photogrammetric Engineering and Remote Sensing (57) 669-675
CT: Theintegration of remote sensing tools and technology with the spatial analysis orientation of geographic information systems is a complex task. In this paper, we focus on the issues of making data available and useful to the user. In part, this involves a set of problems which reflect on the...
Proposed U.S. Geological Survey standard for digital orthophotos
David Hooper, Vincent Caruso
1991, Conference Paper, GIS/LIS 1991 ACSM-ASPRS Fall Convention
The U.S. Geological Survey has added the new category of digital orthophotos to the National Digital Cartographic Data Base. This differentially rectified digital image product enables users to take advantage of the properties of current photoimagery as a source of geographic information. The product and accompanying standard were implemented in...
Impacts of changing irrigation practices on waterfowl habitat use in the southern San Joaquin Valley, California
D. A. Barnum, N. H . Euliss Jr.
1991, California Fish and Game (77) 10-21
We used diurnal aerial census data to examine habitat use patterns of ducks wintering in the southern San Joaquin Valley, California from 1980-87. We calculated densities (birds/ha) for the northern pintail (Anas acuta), mallard (A. platyrhynchos), green-winged teal (A. crecca), cinnamon teal (A. cyanoptera), shoveler (A. clypeata), ruddy duck (Oxyura...
Organizations challenged by global database development
J. A. Sturdevant, J.C. Eidenshink, Thomas R. Loveland
1991, GIS World (4) 73-78
Several international programs have identified the need for a global 1-kilometer spatial database for land cover and land characterization studies. In 1992, the US Geological Survey (USGS) EROS Data Center (EDC), the European Space Agency (ESA), the National Oceanic and Atmospheric Administration (NOAA) and the National Aeronautics and Space Administration...
Louisiana coastal GIS network: Graphical user interface for access to spatial data
Matteson Hiland, Randolph A. McBride, Donald Davis, Dewitt Braud, Henry Streiffer, Farrell Jones, Anthony Lewis, S. Williams
1991, Conference Paper, GIS/LIS 1991 Proceedings
Louisiana's coastal wetlands support a large percentage of the nation's seafood and fur industries, vast deposits of oil and natural gas, habitat for thousands of species of plants and animals, winter nesting grounds and migratory paths for numerous waterfowl, and many recreational resources enjoyed by residents and tourists. Louisiana's wetlands...
An analysis of a seismic reflection from the base of a gas hydrate zone, offshore Peru
J. J. Miller, Myung W. Lee, Roland E. von Huene
1991, American Association of Petroleum Geologists Bulletin (75) 910-924
Seismic reflection data recorded near ODP Site 688, offshore Peru, exhibit a persistent bottom-simulating reflector (BSR) from a depth corresponding to the theoretical base of the gas hydrate stability field. Although gas hydrate has been recovered in cores from scientific drilling in both the Pacific and the Atlantic, drilling in...
Federal support for seismological research; past, present, and future.
D. R. Sarewitz
1991, Earthquakes & Volcanoes (USGS) (22) 115-116
Data from the past 20 years indicate a strong temporal correlation between major California earthquakes and icnreased federal funding for seismology. ...
Hydrogeology and water quality of glacial-drift aquifers in the Bemidji-Bagley area, Beltrami, Clearwater, Cass, and Hubbard Counties, Minnesota
J. R. Stark, J. P. Busch, M. H. Deters
1991, Water-Resources Investigations Report 89-4136
Unconfined and the upper confined aquifers in glacial drift are the primary sources of water in a 1,600 square-mile area including parts of Beltrami, Cass, Clearwater, and Hubbard Counties, Minnesota. The unconfineddrift aquifer consists of coarse sand and gravel in the center of the study area. The total area underlain...
Ground-water levels and quality at Crex Meadows Wildlife Area, Burnett County, Wisconsin
G. L. Patterson
1990, Water-Resources Investigations Report 89–4129
During 1984, above-normal ground-water levels flooded the fields and basements in the vicinity of the Crex Meadows Wildlife Area. In response to concerns of neighboring farmers and homeowners, the Wisconsin Department of Natural Resources and the U.S. Geological Survey began a cooperative study to assess ground-water conditions in the area...
Water-resources potential of the freshwater lens at Key West, Florida
D.J. McKenzie
1990, Water-Resources Investigations Report 90-4115
The island of Key West lies at the end of the Florida Keys, about 150 miles southwest of Miami. The public-water supply for the island is provided by the Florida Keys Aqueduct Authority Well Field near Miami. However, there are many privately owned wells on the island that tap the...
Hydrologic effects of well-field operations in a wetland, Dade County, Florida
R.S. Sonenshein, Ronald H. Hofstetter
1990, Water-Resources Investigations Report 90-4143
Water-level, canal stage and discharge, and rainfall data collected in a wetland in Dade County, Florida, were analyzed to determine the effects of pumping at the Northwest Well Field on water levels in the wetland. The Northwest Well Field is the first major well field in south Florida to be...
A method to estimate canal leakage to the Biscayne Aquifer, Dade County, Florida
D.A. Chin
1990, Water-Resources Investigations Report 90-4135
The leakage characteristics of channels that partially penetrate the Biscayne aquifer and have reduced bed permeability were studied. Leakage characteristics were described in terms of a reach transmissivity-defined as the volume flow rate out of the channel per unit length of the channel per unit drawdown, where drawdown is defined...
Water resources data Maryland and Delaware, water year 1990, Volume 1. Atlantic Slope Basins, Delaware River through Patuxent River
R.W. James, J.F. Hornlein, B.F. Strain, M.J. Smigaj
1990, Water Data Report MD-DE-90-1
No abstract available....
Water resources data Maryland and Delaware, water year 1990, volume 2: Monongahela and Potomac River Basins
R.W. James, J.F. Hornlein, R.H. Simmons, M.J. Smigaj
1990, Water Data Report MD-DE-90-2
No abstract available....
Underwater research methods for study of nuclear bomb craters, Enewetak, Marshall Islands
E.A. Shinn, R.B. Halley, J. L. Kindinger, J.H. Hudson, R.A. Slate
1990, Conference Paper
Three craters, created by the explosion of nuclear fusion devices, were mapped, sampled, core drilled and excavated with airlifts at Enewetak Atoll in the Marshall Islands by using scuba and a research submersible. The craters studied were Mike, Oak, and Koa. Tests took place near sea level at the transition...
Pesticide and PCB residues for loggerhead shrikes in the Shenandoah Valley
A. K. Blumton, J.D. Fraser, R.W. Young, S. Goodbred, S.L. Porter, D.L. Luukkonen
1990, Bulletin of Environmental Contamination and Toxicology (45) 697-702
The decline in loggerhead shrike (Lanius ludovicianus) populations is widespread and coincides with the use of organochlorines that began in the late 1940's and increased until the 1970's (Morrison 1981; Robbins et al. 1986; Tate 1986). An inhabitant of farmland areas, loggerhead shrikes prey on invertebrates and small vertebrates (Bent...
Ground-water conditions in Utah, spring of 1990
L. R. Herbert, G. J. Smith, Kim A. Kariya, James P. Eads, D.V. Allen, Bert Stolp, Lynette E. Brooks, R. B. Garrett, W.C. Brothers, R. W Puchta, R.L. Swenson, D. C. Emett, W.R. Overman, G. W. Sandberg
1990, Cooperative Investigations Report 30
This is the twenty-seventh in a series of annual reports that describe ground-water conditions in Utah. Reports in this series, published cooperatively by the U.S. Geological Survey and the Utah Division of Water Resources, provide data to enable interested parties to keep abreast of changing ground-water conditions.This report, like the...
Ground-water resources and simulated effects of withdrawals in the East Shore area of Great Salt Lake, Utah
David W. Clark, Cynthia L. Appel, Patrick M. Lambert, Robert L. Puryear
1990, Technical Publication 93
The ground-water resources in the East Shore area of Great Salt Lake, Utah, were studied to better define the ground-water system; to document changes in ground-water levels, quality, and storage; and to simulate effects of an increase in ground-water withdrawals. The East Shore aquifer system is in basin-fill deposits, and...
Base of moderately saline ground water in San Juan County, Utah
Lewis Howells
1990, Technical Publication 94
The base of moderately saline ground water (water that contains from 3,000 to 10,000 milligrams per liter of dissolved solids) was delineated for San Juan County, Utah, based on water-quality data and on formation-water resistivities determined from geophysical well logs using the resistivity-porosity, spontaneous-potential, and resistivity-ratio methods. These data and...
