Conference Papers
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Development of a decision support system for monitoring, reporting and forecasting ecological conditions of the Appalachian Trail Development of a decision support system for monitoring, reporting and forecasting ecological conditions of the Appalachian Trail
This paper introduces a collaborative multi-agency effort to develop an Appalachian Trail (A.T.) MEGA-Transect Decision Support System (DSS) for monitoring, reporting and forecasting ecological conditions of the A.T. and the surrounding lands. The project is to improve decisionmaking on management of the A.T. by providing a coherent framework for data integration, status reporting and...
Authors
Yeqiao Wang, Ramakrishna Nemani, Fred Dieffenbach, Kenneth Stolte, Glenn B. Holcomb, Matt Robinson, Casey C. Reese, Marcia McNiff, Roland Duhaime, Geri Tierney, Brian Mitchell, Peter August, Peter Paton, Charles LaBash
Plot-scale sediment transport processes on a burned hillslope as a function of particle size Plot-scale sediment transport processes on a burned hillslope as a function of particle size
Soil moisture, rainfall, runoff, and sediment transport data were collected from four 1-m2 hillslope plots after the 2000 Hi Meadow Fire in Colorado. Data were collected daily during three summers, two of which were affected by drought. Maximum 30-minute rainfall intensities, I30, were less than 20 mm h-1 and the average runoff volumes per plot were less than 4.7 L per storm. The data...
Authors
John A. Moody
Assimilating models and data to enhance predictions of shoreline evolution Assimilating models and data to enhance predictions of shoreline evolution
A modeling system that considers both long- and short-term process-driven shoreline change is presented. The modeling system is integrated into a data assimilation framework that uses sparse observations of shoreline change to correct a model forecast and to determine unobserved model variables and free parameters. Application of the assimilation algorithm also provides quantitative...
Authors
Joseph W. Long, Nathaniel G. Plant
Effects of climate change on saltwater intrusion at Hilton Head Island, SC. U.S.A. Effects of climate change on saltwater intrusion at Hilton Head Island, SC. U.S.A.
Sea‐level rise and changes in precipitation patterns may contribute to the occurrence and affect the rate of saltwater contamination in the Hilton Head Island, South Carolina area. To address the effects of climate change on saltwater intrusion, a threedimensional, finite‐element, variable‐density, solute‐transport model was developed to simulate different rates of sea‐level rise and...
Authors
Dorothy F. Payne
Channel geomorphic responses to disturbances assessed using streamgage information Channel geomorphic responses to disturbances assessed using streamgage information
No abstract available.
Authors
Kyle E. Juracek, Mark W. Bowen
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