Conference Papers
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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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PERFORMANCE OF AN EARTHQUAKE EXCITED ROOF DIAPHRAGM.
The objective of this paper is to study the earthquake performance of the roof diaphragm of the West Valley College gymnasium in Saratoga, California through a complete set of acceleration records obtained during the 24 April 1984 Morgan Hill Earthquake (M equals 6. 1). The roof diaphragm of the 112 ft. multiplied by 144 ft. rectangular, symmetric gymnasium consists of 3/8 in. plywood over tongue-
Authors
M. Çelebi, G. Brady, E. Şafak, A. Converse
PERSPECTIVE ON LANDSLIDE DAMS.
The most common types of mass movements that form landslide dams are rock and soil slumps and slides; mud, debris, and earth flows: and rock and debris avalanches. The most common initiation mechanisms for dam-forming landslides are excessive rainfall and snow melt, and earthquakes. Most landslide dams are remarkable short-lived. In a sample of 63 documented cases, 22 percent of the landslide dams
Authors
Robert L. Schuster, John E. Costa
PHREATOPHYTE WATER USE ESTIMATED BY EDDY-CORRELATION METHODS.
Water-use was estimated for three phreatophyte communities: a saltcedar community and an alkali-Sacaton grass community in New Mexico, and a greasewood rabbit-brush-saltgrass community in Colorado. These water-use estimates were calculated from eddy-correlation measurements using three different analyses, since the direct eddy-correlation measurements did not satisfy a surface energy balance. The
Authors
H. L. Weaver, E.P. Weeks, G. S. Campbell, D.I. Stannard, B.D. Tanner
Predictive models in hazard assessment of Great Lakes contaminants for fish
A hazard assessment scheme was developed and applied to predict potential harm to aquatic biota of nearly 500 organic compounds detected by gas chromatography/mass spectrometry (GC/MS) in Great Lakes fish. The frequency of occurrence and estimated concentrations of compounds found in lake trout (Salvelinus namaycush) and walleyes (Stizostedion vitreum vitreum) were compared with available manufact
Authors
Dora R. May Passino
RAINFALL-LOSS PARAMETER ESTIMATION FOR ILLINOIS.
The U. S. Geological Survey is currently conducting an investigation to estimate values of parameters for two rainfall-loss computation methods used in a commonly used flood-hydrograph model. Estimates of six rainfall-loss parameters are required: four for the Exponential Loss-Rate method and two for the Initial and Uniform Loss-Rate method. Multiple regression analyses on calibrated data from 616
Authors
Linda S. Weiss, Audrey L. Ishii
Recent developments in the U. S. Geological Survey's Landsat image mapping program
At the 1984 ASPRS-ACSM Convention in Washington, D. C. a paper on 'The Emerging U. S. Geological Survey Image Mapping Program' was presented that discussed recent satellite image mapping advancements and published products. Since then Landsat image mapping has become an integral part of the National Mapping Program. The Survey currently produces about 20 Landsat multispectral scanner (MSS) and The
Authors
Frederick S. Brownworth, Wayne G. Rohde
RECOVERY OF FRESHWATER STORED IN SALINE AQUIFERS IN PENINSULAR FLORIDA.
Subsurface freshwater storage has been operationally tested at seven sites in central and south Florida. Injection was into a high chloride water aquifer at six sites, and into a high sulfate water aquifer at the seventh. Recovery efficiency has ranged from 0 to 75 percent in high chloride water aquifers, and has exceeded 100 percent in the high sulfate water aquifer. Computer modeling techniques
Authors
Michael L. Merritt
RELATION BETWEEN SURFACE-WATER QUALITY AND THE COMPOSITION OF COAL IN PIKE COUNTY, KENTUCKY.
The quality of surface water in Pike County, Kentucky, seems to reflect the composition of coals in the county. Groundwater acquires mineral concentration characteristics of the rocks through which it moves. When groundwater is discharged to streams the mineral concentrations in streams, especially during low flow periods, are characteristic of several coal beds that are a part of the aquifier sys
Authors
Jay Kiesler
Repetitive digital NOAA-AVHRR data for Alaskan engineering and scientific applications
Selected digitally enhanced NOAA - Advanced Very High Resolution Radiometer (AVHRR) images taken by the NOAA 6, 7, 8 and 9 Polar Orbiting Satellites demonstrate the capability and application of repetitive low-resolution satellite data to Alaska's engineering and science community. Selected cloud-free visible and thermal infrared images are enhanced to depict distinct oceanographic and geologic pr
Authors
William M. Christie, Robert J. Pawlowski, Michael D. Fleming
Requirements for integrating natural and artificial production of anadromous salmonids in the Pacific Northwest
No abstract available
Authors
R.R. Reisenbichler, J.D. McIntyre
Research on polar bears in Alaska, 1983-1985
Research on the ecology and status of polar bear populations in Alaska has continued since 1967. Research was a joint U.S. Fish and Wildlife Service/Alaska Department of Fish and Game effort until passage of the Marine Mammal Protection Act in 1972, and has been largely a Federal effort since then. In 1985, Alaskan polar beer research continues to be carried out by the Research Division of the U.S
Authors
Steven C. Amstrup
REVERSING CYCLIC ELASTO-PLASTIC DEMANDS ON STRUCTURES DURING STRONG MOTION EARTHQUAKE EXCITATION.
Using the horizontal components from El Centro 1940, Taft 1952, and 4 accelerograms from the San Fernando earthquake of 2/9/71, the time history of the elasto-plastic displacement response was calculated for oscillators having periods within the range of 1 to 6 s and ductility factors within the range of 3 to 6. The Nth largest peak of the elasto-plastic response (N equals 2,4,8,16), when expresse
Authors
V. Perez, A. G. Brady, E. Şafak