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
Reducing risk in exploration under cover
No abstract available.
Authors
Donald A. Singer, Ryoichi Kouda
Relationship between quartz trace elements and SEM-Cathodoluminescence textures revealed using WDS mapping techniques
[No abstract available]
Authors
H.A. Lowers, B.G. Rusk
Research approach to teaching groundwater biodegradation in karst aquifers
TSU in partnership with the USGS has conducted extensive research regarding biode??gradation of contaminants in karst aquifers. This research resulted in the development of a numerical approach to modeling biodegradation of contaminants in karst aquifers that is taught to environmental engineering students in several steps. First, environmental engineering students are taught chemical-reaction eng
Authors
L. King, T. Byl, R. Painter
Resistivity imaging in eastern Nevada Using the audiomagnetotelluric method for hydrogeologic framework studies
Inversion of audiomagnetotelluric (AMT) sounding data collected in eastern Nevada shows significant structure within the upper kilometer of the subsurface that defines the geologic framework from which hydrologic models will be developed. We collected AMT data along two profiles in Spring and Cave valleys in 2004–2005, using the Geometrics StrataGem EH4 system, a four‐channel, natural and controll
Authors
Darcy McPhee, Louise Pellerin, B. A. Churchel, Janet E. Tilden, Gary L. Dixon
River-aquifer interactions, geologic heterogeneity, and low-flow management
Low river flows are commonly controlled by river-aquifer exchange, the magnitude of which is governed by hydraulic properties of both aquifer and aquitard materials beneath the river. Low flows are often important ecologically. Numerical simulations were used to assess how textural heterogeneity of an alluvial system influences river seepage and low flows. The Cosumnes River in California was used
Authors
J.H. Fleckenstein, R.G. Niswonger, G.E. Fogg
Scientific developments ISFD3
Highlights, trends, and consensus from the 63 papers submitted to the Scientific Developments theme of the Third International Symposium on Flood Defence (ISFD) are presented. Realizing that absolute protection against flooding can never be guaranteed, trends in flood management have shifted: (1) from flood protection to flood-risk management, (2) from reinforcing structural protection to lowering
Authors
M.H.I. Schropp, T.W. Soong
Sediment and nutrient accumulation within lowland bottomland ecosystems: An example from the Atchafalaya River Basin, Louisiana
Sediment and nutrient deposition, storage, and transformations are important environmental functions of riverine forested wetland ecosystems, yet documentation and interpretation of sedimentation/nutrient processes remain incomplete. Our studies located in the Coastal Plain of southeastern USA, including the Atchafalaya Basin, La. (a distributary of the Mississippi River) serve as example for deta
Authors
C. R. Hupp, G.B. Noe
Sedimentation and bathymetry changes in south San Francisco Bay: 1858-1983
No abstract available.
Authors
A.C. Foxgrover, S.A. Higgins, M.K. Ingraca, B. E. Jaffe, R. E. Smith
Seed dispersal in fens
Question: How does seed dispersal reduce fen isolation and contribute to biodiversity? Location: European and North American fens. Methods: This paper reviews the literature on seed dispersal to fens. Results: Landscape fragmentation may reduce dispersal opportunities thereby isolating fens and reducing genetic exchange. Species in fragmented wetlands may have lower reproductive success, which can
Authors
B. Middleton, R. Van Diggelen, K. Jensen
Small satellite multi mission C2 for maximum effect
This paper discusses US Air Force, US Army, US Navy, and NASA demonstrations based around the Virtual Mission Operations Center (VMOC) and its application in fielding a Multi Mission Satellite Operations Center (MMSOC) designed to integrate small satellites into the inherently tiered system environment of operations. The intent is to begin standardizing the spacecraft to ground interfaces needed t
Authors
E. Miller, O. Medina, C. R. Lane, A. Kirkham, W. Ivancic, B. Jones, R. Risty
Spatial correlation of shear-wave velocity within San Francisco Bay Sediments
Sediment properties are spatially variable at all scales, and this variability at smaller scales influences high frequency ground motions. We show that surface shear-wave velocity is highly correlated within San Francisco Bay Area sediments using shear-wave velocity measurements from 210 seismic cone penetration tests. We use this correlation to estimate the surface sediment velocity structure usi
Authors
E.M. Thompson, L.G. Baise, R. E. Kayen
Stability of landsat-4 thematic mapper outgassing models
Oscillations in radiometric gains of the short wave infrared (SWIR) bands in Landsat-4 (L4) and Landsat-5 (L5) Thematic Mappers (TMs) are observed through an analysis of detector responses to the Internal Calibrator (IC) pulses. The oscillations are believed to be caused by an interference effect due to a contaminant film buildup on the window of the cryogenically cooled dewar that houses these de
Authors
E. Micijevic, G. Chander