Conference Papers
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Browse almost 5,000 conference papers authored by our scientists and refine search by topic, location, year, and advanced search.
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Extending and testing Graizer-Kalkan ground motion attenuation model based on atlas database of shallow crustal events Extending and testing Graizer-Kalkan ground motion attenuation model based on atlas database of shallow crustal events
No abstract available.
Authors
Vladimir Graizer, Erol Kalkan, Kuo-Wan Lin
20,000 grain-size observations from the bed of the Colorado River, and implications for sediment transport through Grand Canyon 20,000 grain-size observations from the bed of the Colorado River, and implications for sediment transport through Grand Canyon
In the late 1990s, we developed digital imaging hardware and software for in-situ mapping of sand-sized bed sediment of the Colorado River in Grand Canyon. This new technology enables collection and processing of hundreds of grain-size samples in a day. Bed grain size was mapped using this equipment on 8 surveys of the Colorado River in Grand Canyon, for a total of more than 20,000...
Authors
David M. Rubin, David J. Topping, Henry Chezar, Joseph E. Hazel, John C. Schmidt, Michael J. Breedlove, Theodore S. Melis, Paul E. Grams
Climate change and climate systems influence and control the atmospheric dispersion of desert dust: implications for human health Climate change and climate systems influence and control the atmospheric dispersion of desert dust: implications for human health
The global dispersion of desert dust through Earth’s atmosphere is greatly influenced by temperature. Temporal analyses of ice core data have demonstrated that enhanced dust dispersion occurs during glacial events. This is due to an increase in ice cover, which results in an increase in drier terrestrial cover. A shorter temporal analysis of dust dispersion data over the last 40 years...
Authors
Dale W. Griffin
Discriminating silt-and-clay from suspended-sand in rivers using side-looking acoustic profilers Discriminating silt-and-clay from suspended-sand in rivers using side-looking acoustic profilers
The ability to accurately monitor suspended-sediment flux in rivers is needed to support many types of studies, because the sediment that typically travels in suspension affects geomorphology and aquatic habitat in a variety of ways (e.g. bank and floodplain deposition, bar morphology, light penetration and primary productivity, tidal wetland deposition in the context of sea-level rise...
Authors
Scott Wright, David J. Topping, Cory A. Williams
Estimating salinity intrusion effects due to climate change along the Grand Strand of the South Carolina coast Estimating salinity intrusion effects due to climate change along the Grand Strand of the South Carolina coast
The ability of water-resource managers to adapt to future climatic change is especially challenging in coastal regions of the world. The East Coast of the United States falls into this category given the high number of people living along the Atlantic seaboard and the added strain on resources as populations continue to increase, particularly in the Southeast. Increased temperatures...
Authors
Paul Conrads, Edwin A. Roehl, Charles T. Sexton, Daniel L. Tufford, Gregory J. Carbone, Kristin Dow, John B. Cook
Evolving fluvial response of the Sandy River, Oregon, following removal of Marmot Dam Evolving fluvial response of the Sandy River, Oregon, following removal of Marmot Dam
The October 2007 removal of Marmot Dam on the Sandy River, Oregon, triggered a rapid sequence of fluvial responses as ~730,000 m3 of sand and gravel that filled the former reservoir were suddenly exposed to an energetic river. Using direct measurements of sediment transport, photogrammetry, and repeat surveys between transport events, we monitored the erosion, transport, and redeposition...
Authors
Jon J. Major, Jim O’Connor, Charles J. Podolak, Mackenzie K. Keith, Kurt R. Spicer, J. Rose Wallick, Heather M. Bragg, Smokey Pittman, Peter R. Wilcock, Abagail Rhode, Gordon E. Grant
Field evaluation of sediment-concentration errors arising from Non-Isokinetic intake efficiency in depth-integrating suspended-sediment bag samplers Field evaluation of sediment-concentration errors arising from Non-Isokinetic intake efficiency in depth-integrating suspended-sediment bag samplers
No abstract available.
Authors
Thomas A. Sabol, David J. Topping, Ronald E. Griffiths
Grain-size evolution in suspended sediment and deposits from the 2004 and 2008 controlled-flood experiments in Marble and Grand Canyons, Arizona Grain-size evolution in suspended sediment and deposits from the 2004 and 2008 controlled-flood experiments in Marble and Grand Canyons, Arizona
Since the closure of Glen Canyon Dam in 1963, the hydrology, sediment supply, and distribution and size of modern alluvial deposits in the Colorado River through Grand Canyon have changed substantially (e.g., Howard and Dolan, 1981; Johnson and Carothers, 1987; Webb et al., 1999; Rubin et al., 2002; Topping et al., 2000, 2003; Wright et al., 2005; Hazel et al., 2006). The dam has reduced...
Authors
Amy E. Draut, David J. Topping, David M. Rubin, Scott Wright, John C. Schmidt
Potential mitigation approach to minimize salinity intrusion in the Lower Savannah River Estuary due to reduced controlled releases from Lake Thurmond Potential mitigation approach to minimize salinity intrusion in the Lower Savannah River Estuary due to reduced controlled releases from Lake Thurmond
The Savannah River originates at the confluence of the Seneca and Tugaloo Rivers, near Hartwell, Ga. and forms the State boundary between South Carolina and Georgia. The J. Strom Thurmond Dam and Lake, located 187 miles upstream from the coast, is responsible for most of the flow regulation that affects the Savannah River from Augusta to the coast. The Savannah Harbor experiences semi...
Authors
Paul Conrads, James M. Greenfield
Sediment management strategies associated with dam removal in the State of Washington Sediment management strategies associated with dam removal in the State of Washington
Different removal strategies are described for dams in three diverse drainage basins (Wind River, White Salmon River, and Elwha River basins) in the State of Washington (USA). The comparisons between the strategies offer the opportunity to track the effects of sediment resulting from dam decommissioning in the Pacific Northwest and to determine possible effects on socio-economically...
Authors
C. S. Magirl, P.J. Connolly, B. Coffin, J.J. Duda, A.E. Draut
Suspended-sediment concentration regimes in Tennessee biological reference streams Suspended-sediment concentration regimes in Tennessee biological reference streams
Suspended-sediment-concentration (SSC) regimes of five biological reference streams in Tennessee were characterized from 15-minute SSC records spanning 1 to 4 water years (October 1 through September 30) between 2004 and 2008. These streams represent least disturbed conditions for their respective ecoregions and have exceptional biodiversity in terms of fish or aquatic invertebrates. SSC...
Authors
Timothy H. Diehl, William J. Wolfe
The use of the multi-dimensional surface-water modeling system (MD-SWMS) in calculating discharge and sediment transport in remote ephemeral streams The use of the multi-dimensional surface-water modeling system (MD-SWMS) in calculating discharge and sediment transport in remote ephemeral streams
No abstract available.
Authors
Peter G. Griffiths, David J. Topping, Richard R. McDonald, Thomas A. Sabol