Conference Papers
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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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Comparison of estimates of uncertainty of discharge at US geological survey index-velocity gages on the Chicago sanitary and ship canal, Illinois
Estimates of uncertainty of discharge at time scales from 5 minutes to 1 year were obtained for two index-velocity gages on the Chicago Sanitary and Ship Canal (CSSC), Ill., instrumented with acoustic velocity meters (AVMs). The velocity measurements obtained from the AVMs are corrected to a mean channel velocity by use of an index velocity rating (IVR). The IVR is a regression-derived relation be
Authors
T.M. Over, James J. Duncker, J. A. Gonzalez-Castro
Comparison of natural resource issues on tropical pacific ranges
The natural resources issues on tropical Pacific ranges are compared. If active management plan is in place, FWS may exempt those spp. from critical Habitat Prevention and control or invasive species essential. Wetlands are low-hanging fruit for restoration, but birds present mgmt. challenge. Marine sites may offer less potential for precise mgmt. of natural resources than terrestrial sites such a
Authors
D.A. Helweg, J.D. Jacobi
Composition of water and suspended sediment in streams of urbanized subtropical watersheds in Hawaii
Urbanization on the small subtropical island of Oahu, Hawaii provides an opportunity to examine how anthropogenic activity affects the composition of material transferred from land to ocean by streams. This paper investigates the variability in concentrations of trace elements (Pb, Zn, Cu, Ba, Co, As, Ni, V and Cr) in streams of watersheds on Oahu, Hawaii. The focus is on water and suspended parti
Authors
E. H. De Carlo, V.L. Beltran, M.S. Tomlinson
Comprehensive assessment of precursors, diagenesis, and reactivity to water treatment of dissolved and colloidal organic matter
A comprehensive isolation, fractionation, and characterization research approach was developed for dissolved and colloidal organic matter (DOM) in water, and it was applied to various surface- and groundwaters to assess DOM precursors, DOM diagenesis, and DOM reactivity to water treatment processes. Major precursors for natural DOM are amino sugars, condensed tannins, and terpenoids. Amino sugar c
Authors
J. A. Leenheer
Continuous thermochemical conversion process to produce oil from swine manure
Thermochemical conversion (TCC) of livestock manure is a novel technology that has shown very promising results in treating waste and producing oil. A batch TCC system that was previously developed successfully converted 70% of swine manure volatile solids to oil and reduced manure chemical oxygen demand by ??? 75%. The necessary retention time to achieve an oil product was largely dependent on th
Authors
K. Ocfemia, Y. Zhang, T. Funk, L. Christianson, S. Chen
Contrasting discharge computation methods in riverine and tidal-affected flows in Mississippi
Recent advancements in acoustic science have improved the measurement of real-time flow conditions in complex open-channel flow systems with dynamic channel geometry, velocity distribution and direction, and other gradually varying hydraulic characteristics. In the lower Pascagoula River Basin, a drainage area of about 9,500 square miles in Mississippi, riverine and tidal-affected river reaches ex
Authors
D.P. Turnipseed
Coordination of international bedload research
No abstract available.
Authors
John R. Gray, Jonathan B. Laronne
Correlative weighted stacking for seismic data in the wavelet domain
Horizontal stacking plays a crucial role for modern seismic data processing, for it not only compresses random noise and multiple reflections, but also provides a foundational data for subsequent migration and inversion. However, a number of examples showed that random noise in adjacent traces exhibits correlation and coherence. The average stacking and weighted stacking based on the conventional
Authors
S. Zhang, Y. Xu, J. Xia
Data dictionary and formatting standard for dissemination of geotechnical data
A pilot system for archiving and web dissemination of geotechnical data collected and stored by various agencies is currently under development. Part of the scope of this project, sponsored by the Consortium of Organizations for Strong-Motion Observation Systems (COSMOS) and by the Pacific Earthquake Engineering Research Center (PEER) Lifelines Program, is the development of a data dictionary and
Authors
J. Benoit, J.I. Bobbitt, D. J. Ponti, S.A. Shimel
Debris-flow susceptibility of watersheds recently burned by wildfire
Evaluation of the erosional response of 95 recently burned watersheds in Colorado, New Mexico, and southern California to storm rainfall established the factors that best differentiate between debris-flow producing basins and those that produced other flow responses. These factors are drainage-basin morphology and lithology, and the presence or absence of water-repellent soils. Basins underlain by
Authors
S.H. Cannon
Deformation of the Aniakchak Caldera, Alaska, mapped by InSAR
The deformation of Aniakchak volcano is investigated using 19 ERS-1 / 2 interferometric synthetic aperture radar (InSAR) data from 1992 through 2002. InSAR images from the different time intervals reveal that the10-km-wide caldera has been subsiding during the time of investigation. The pattern of subsidence does not following the pyroclastic flows from the last eruption of the caldera in 1931. Th
Authors
Oh-Ig Kwoun, Z. Lu
DEM generation and tidal deformation detection for Sulzberger Ice Shelf, West Antarctica using SAR interferometry
In this study we generated a relative Digital Elevation Model (DEM) over the Sulzberger Ice Shelf, West Antarctica using ERS1/2 synthetic aperture radar (SAR) interferometry data. Four repeat pass differential interferograms are used to find the grounding zone and to classify the study area. An interferometrically derived DEM is compared with laser altimetry profile from ICESat. Standard deviation
Authors
S. Baek, Oh-Ig Kwoun, M. Bassler, Z. Lu, C. K. Shum, R. Dietrich