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.
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Using open hole and cased-hole resistivity logs to monitor gas hydrate dissociation during a thermal test in the mallik 5L-38 research well, Mackenzie Delta, Canada
Gas hydrates, which are naturally occurring ice-like combinations of gas and water, have the potential to provide vast amounts of natural gas from the world's oceans and polar regions. However, producing gas economically from hydrates entails major technical challenges. Proposed recovery methods such as dissociating or melting gas hydrates by heating or depressurization are currently being tested.
Authors
B.I. Anderson, T. S. Collett, R.E. Lewis, I. Dubourg
Utility of shallow-water ATRIS images in defining biogeologic processes and self-similarity in skeletal scleractinia, Florida reefs
A recently developed remote-sensing instrument acquires high-quality digital photographs in shallow-marine settings within water depths of 15 m. The technology, known as the Along-Track Reef-Imaging System, provides remarkably clear, georeferenced imagery that allows visual interpretation of benthic class (substrates, organisms) for mapping coral reef habitats, as intended. Unforeseen, however, ar
Authors
B. H. Lidz, J. C. Brock, D.B. Nagle
Validation of exposure time for discharge measurements made with two bottom-tracking acoustic doppler current profilers
Previous work by Oberg and Mueller of the U.S. Geological Survey in 2007 concluded that exposure time (total time spent sampling the flow) is a critical factor in reducing measurement uncertainty. In a subsequent paper, Oberg and Mueller validated these conclusions using one set of data to show that the effect of exposure time on the uncertainty of the measured discharge is independent of stream w
Authors
J. A. Czuba, K. Oberg
Viscoelastic love-type surface waves
The general theoretical solution for Love-Type surface waves in viscoelastic media provides theoreticalexpressions for the physical characteristics of the waves in elastic as well as anelastic media with arbitraryamounts of intrinsic damping. The general solution yields dispersion and absorption-coefficient curves for the waves as a function of frequency and theamount of intrinsic damping for any
Authors
Roger D. Borcherdt
Water-quality monitoring and process understanding in support of environmental policy and management
The quantity and quality of freshwater at any point on the landscape reflect the combined effects of many processes operating along hydrological pathways within a drainage basin/watershed/catchment. Primary drivers for the availability of water are landscape changes and patterns, and the processes affecting the timing, magnitude, and intensity of precipitation, including global climate change. The
Authors
N.E. Peters
Cross-borehole flow tests and insights into hydraulic connections in fractured mudstone and sandstone
Cross-borehole flow tests provided insights into hydraulic connections in fractured and dipping mudstone and sandstone that were consistent with the lithostratigraphic and structural framework of a VOCcontaminated bedrock research site in west-central New Jersey. Two cross-borehole flow tests were completed. Each test involved measurement and analysis of transient flow in a newly installed deep co
Authors
John H. Williams, Pierre Lacombe, Carole D. Johnson, Frederick L. Paillet
New SHRIMP-RG U-Pb zircon ages and Sm-Nd analyses of Proterozoic metamorphic rocks of the San Gabriel basement terrane: Keys for Laurentian crustal reconstruction
No abstract available.
Authors
Wayne R. Premo, Jonathan A. Nourse, Pedro Castineiras, Karl S. Kellogg
Impacts of climate change on wintertime precipitation, snowmelt regime, surface runoff, and infiltration in the northeastern USA during the 21st century
No abstract available.
Authors
Thomas G. Huntington, J. Sheffield, K. Hayhoe
Bibliography of research papers that are consistent with hydrologic responses to ongoing systematic changes in climate
No abstract available
Authors
Thomas G. Huntington
Holocene reworking of a sand sheet in the Merrimack Embayment, Western Gulf of Maine
Recent bathymetric, backscatter, and seafloor sediment samples demonstrate that a large sand sheet was formed in the inner shelf by the reworking of the Merrimack River lowstand delta (deposited 12 kya; currently at 45 m depth) and braid plain during the Holocene transgression. Asymmetric bedforms and distinct grain size distributions suggest the sand sheet is actively being reworked by inner-shel
Authors
C.J. Hein, D. M. FitzGerald, W. Barnhardt
Overview: The Chemehuevi Formation along the lower Colorado River
A distinctive set of fine-grained deposits occurs throughout the lower Colorado River Valley, extending from just below the mouth of Grand Canyon to well into the river delta below Yuma, AZ (Figure 1), an along-channel distance of over 700 km. Upstream of Parker, Arizona, the deposits consist of scattered erosional remnants up to 150 m above the modern floodplain. Below Parker, they occur in isola
Authors
Daniel V. Malmon, Keith A. Howard
Stratigraphy of Colorado River deposits in lower Mohave Valley, Arizona and California
Deposits in lower Mohave Valley and upper Topock Gorge near Topock, Arizona and Park Moabi, California record a succession of depositional and erosional events since late Miocene time that relate to the development of the Colorado River. Upper Miocene alluvial fans were deposited toward a depocenter east of the present valley bottom, indicating there was no valley outlet then through the area of T
Authors
Keith A. Howard, D.V. Malmon