Conference Papers
Science Quality and Integrity
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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.
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Development of a consortium for water security and safety: Planning for an early warning system
The events of September 11, 2001 have raised concerns over the safety and security of the Nation's critical infrastructure including water and waste water systems. In June 2002, the U.S. EPA's Region II Office (New York City), in response to concerns over water security, in collaboration with Rutgers University agreed to establish a Regional Drinking Water Security and Safety Consortium (RDWSSC).
Authors
R.M. Clark, N.R. Adam, V. Atluri, M. Halem, E. F. Vowinkel
Development of an AMS method to study oceanic circulation characteristics using cosmogenic 39Ar
Initial experiments at the ATLAS facility [Nucl. Instr. and Meth. B 92 (1994) 241] resulted in a clear detection of cosmogenic 39Ar signal at the natural level. The present paper summarizes the recent developments of 39Ar AMS measurements at ATLAS: the use of an electron cyclotron resonance (ECR) positive ion source equipped with a special quartz liner to reduce 39K background, the development of
Authors
P.H. Collon, M. Bichler, J. Caggiano, L.D. Cecil, Masri Y. El, R. Golser, C.L. Jiang, A. Heinz, D. Henderson, W. Kutschera, B.E. Lehmann, P. Leleux, H.H. Loosli, R.C. Pardo, M. Paul, K.E. Rehm, P. Schlosser, R.H. Scott, W.M. Smethie, R. Vondrasek
Development of microanalytical reference materials for geochemical analysis
[No abstract available]
Authors
S. A. Wilson, P.A. Potts
Development of regional liquefaction-induced deformation hazard maps
This paper describes part of a project to assess the feasibility of producing regional (1:24,000-scale) liquefaction hazard maps that are based-on potential liquefaction-induced deformation. The study area is the central Santa Clara Valley, at the south end of San Francisco Bay in Central California. The information collected and used includes: a) detailed Quaternary geological mapping, b) over 65
Authors
A. Rosinski, Kathy L. Knudsen, J. Wu, R.B. Seed, C.R. Real
Distribution of sea anemones (Cnidaria, Actiniaria) in Korea analyzed by environmental clustering
Using environmental data and the geospatial clustering tools LOICZView and DISCO, we empirically tested the postulated existence and boundaries of four biogeographic regions in the southern part of the Korean peninsula. Environmental variables used included wind speed, sea surface temperature (SST), salinity, tidal amplitude, and the chlorophyll spectral signal. Our analysis confirmed the existenc
Authors
H.-R. Cha, R. W. Buddemeier, D.G. Fautin, P. Sandhei
Ecological effects of animal introductions at Channel Islands National Park
Based on research, park managers are adopting a holistic approach to island restoration that includes eradication of nonnative species, restoration of native plant habitats, and monitoring.
Authors
K. McEachern
Ecosystem restoration on the California Channel Islands
Restoration of natural habitat has become increasingly important over the last three decades in the United States, first as mitigation for development (especially in wetlands), and more recently in natural areas. This latter restoration has come about as land managing agencies have seen the need to reverse the impact of past land uses and agencies like the National Park Service have taken on the r
Authors
W. L. Halvorson
Edwards plateau: Analysis of land cover trends
The Land Cover Trends project studies the rates, causes, and consequences of contemporary (1973-2000) change in land use and land cover in the United States on an ecoregional basis. The Edwards Plateau ecoregion is the focus of this report. Landsat imagery from five dates during a nearly 30-year period are interpreted for randomly selected sample blocks. The resulting data provide the foundation f
Authors
B.A. Friesen, D.J. Hester, K.A. Casey
Effect of temporal resolution on the accuracy of ADCP measurements
The application of acoustic Doppler current profilers (ADCP's) in river flow measurements is promoting a great deal of progress in hydrometry. ADCP's not only require shorter times to collect data than traditional current meters, but also allow streamflow measurements at sites where the use of conventional meters is either very expensive, unsafe, or simply not possible. Moreover, ADCP's seem to of
Authors
J. A. Gonzalez-Castro, K. Oberg, James J. Duncker
Electron probe microanalysis as a tool for identifying vermiculite sources
[No abstract available]
Authors
H.A. Lowers, G.P. Meeker
Enhanced gas-phase transport in a deep unsaturated zone, Amargosa Desert (U.S.A.)
No abstract available.
Authors
Michelle Ann Walvoord, David A. Stonestrom
Environmental behavior of two molybdenum porphyry systems
Our study focuses on the geology, hydrology, and geochemistry of a variety of molybdenum (Mo) porphyry systems. The systems are either high fluorine, granite, Climax-type, systems (e.g. Mount Emmons/ Redwell Mo deposit, Colorado and Questa Mo deposit, New Mexico) or low fluorine granodiorite systems (e.g. Buckingham Stockwork Mo deposit, Battle Mountain, Nevada and Cannivan Gulch Mo deposit, Monta
Authors
M.L.W. Tuttle, R. B. Wanty, B. R. Berger