Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
Filter Total Items: 5326
Post-earthquake investigations-exercising the NEHRP plan and development of a virtual clearinghouse concept
No abstract available.
Authors
Thomas L. Holzer, Christopher Rojahn, Charles Scawthorn
Liquemap: A real-time post-earthquake map of liquefaction probability
No abstract available.
Authors
Michael J. Bennett, Luke Blair, Thomas L. Holzer, Thomas E. Noce
Assessment of ground deformation due to soil liquefaction in the San Jose, California area by using geotechnical IT
No abstract available.
Authors
Robert E. Kayen, Keith L. Knudsen, Satoshi Nagata, Yasuo Tanaka
Miocene gold mineralization and exhumation of the southern Shoshone Range, north-central Nevada
No abstract available.
Authors
Thomas E. Moore, P. B. O'Sullivan
Relations among pH, sulfate, and metals concentrations in anthracite and bituminous coal-mine discharges, Pennsylvania
Water-quality data for discharges from 140 abandoned mines in the Bituminous and Anthracite Coalfields of Pennsylvania illustrate relations among pH, sulfate, and dissolved metal concentrations. The pH for the 140 samples ranged from 2.7 to 7.3, with two modes at pH 2.5 to 4 (acidic) and 6 to 7 (near neutral). Generally, flow rates were smaller and solute concentrations were greater for low-pH sam
Authors
Charles A. Cravotta, III
Textural analysis of marine sediments at the USGS Woods Hole Science Center; methodology and data on DVD
Marine sediments off the eastern United States vary markedly in texture (i.e., the size, shape, composition, and arrangement of their grains) due to a complex geologic history. For descriptive purposes, however, it is typically most useful to classify these sediments according to their grain-size distributions. In 1962, the U.S. Geological Survey began a program to study the marine geology of the
Authors
Lawrence J. Poppe, S. Jeffress Williams, Valerie F. Paskevich
Centralization and locality in the 20th century National Topographic Mapping Program In the United States
No abstract available.
Authors
Dalia E. Varanka
Use of models to map potential capture of surface water
The effects of ground-water withdrawals on surface-water resources and riparian vegetation have become important considerations in water-availability studies. Ground water withdrawn by a well initially comes from storage around the well, but with time can eventually increase inflow to the aquifer and (or) decrease natural outflow from the aquifer. This increased inflow and decreased outflow is ref
Authors
Stanley A. Leake
Topomapping of Mars with HRSC Images, ISIS, and a commercial stereo workstation
We demonstrate that the freely available USGS planetary cartography software package ISIS and the commercial photogrammetric software SOCET SET jointly provide a complete environment for the processing of Mars Express High Resolution Stereo Camera (HRSC) images. Capabilities include bundle adjustment, automated production and interactive editing of stereo digital terrain models (DTMs), orthomosaic
Authors
Randolph L. Kirk, Elpitha Howington-Kraus, Donna M. Galuszka, Bonnie L. Redding, Trent M. Hare
Uncertainty management, spatial and temporal reasoning, and validation of intelligent environmental decision support systems
There are inherent open problems arising when developing and running Intelligent Environmental
Decision Support Systems (IEDSS). During daily operation of IEDSS several open challenge problems
appear. The uncertainty of data being processed is intrinsic to the environmental system, which is being
monitored by several on-line sensors and off-line data. Thus, anomalous data values at data gatheri
Authors
Miquel Sànchez-Marrè, Karina Gilbert, Rick S. Sojda, Jean Philippe Steyer, Peter Struss, Ignasi Rodríguez-Roda
A tool for assessing mercury loadings from restored tidal systems
Accurately quantifying net loads in tidal systems is difficult owing to the high variability in constituent concentrations over the vastly different time scales present in these systems. Perhaps most difficult is the measurement of fluxed over the tidal time scale. On this scale, the net export of the constituent is orders of magnitude less than the bulk exchange in either direction because of the
Authors
J.A. Fleck, B.A. Bergamaschi, B.D. Downing, M. A. Lionberger, D. H. Schoellhamer, E. Boss, M. Stephenson
Sediment supply and demand for salt pond restoration
No abstract available.
Authors
David H. Schoellhamer, James L. Orlando, Scott Wright, Larry A. Freeman