Conference Papers
Science Quality and Integrity
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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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Monitoring the long term stability of the IRS-P6 AWiFS sensor using the Sonoran and RVPN sites Monitoring the long term stability of the IRS-P6 AWiFS sensor using the Sonoran and RVPN sites
This paper focuses on radiometric and geometric assessment of the Indian Remote Sensing (IRS-P6) Advanced Wide Field Sensor (AWiFS) sensor using the Sonoran desert and Railroad Valley Playa, Nevada (RVPN) ground sites. Imageto- Image (I2I) accuracy and relative band-to-band (B2B) accuracy were measured. I2I accuracy of the AWiFS imagery was assessed by measuring the imagery against...
Authors
Gyanesh Chander, Aparajithan Sampath, Amit Angal, Taeyoung Choi, Xiaoxiong Xiong
Trends in live-bed pier scour at selected bridges in South Carolina Trends in live-bed pier scour at selected bridges in South Carolina
The U.S. Geological Survey, in cooperation with the South Carolina Department of Transportation, used ground-penetrating radar to collect measurements of live-bed pier scour at 78 bridges in the Piedmont and Coastal Plain physiographic provinces of South Carolina. The 141 measurements of live-bed pier-scour depth ranged from 0.5 to 5.1 meters. Using hydraulic data estimated with a one...
Authors
Andral W. Caldwell, Stephen T. Benedict
Are invertebrate traits influenced by natural gradients? Implications for trait based biomonitoring at national and regional-scales Are invertebrate traits influenced by natural gradients? Implications for trait based biomonitoring at national and regional-scales
No abstract available.
Authors
Travis S. Schmidt, Robert E. Zuellig
Occurrence of phosphorus in groundwater and surface water of northwestern Mississippi Occurrence of phosphorus in groundwater and surface water of northwestern Mississippi
Previous localized studies of groundwater samples from the Mississippi River Valley alluvial (MRVA) aquifer have demonstrated that dissolved phosphorus concentrations in the aquifer are much higher than the national background concentration of 0.03 milligram per liter (mg/L) found in 400 shallow wells across the country. Forty-six wells screened in the MRVA aquifer in northwestern...
Authors
Heather L. Welch, James A. Kingsbury, Richard H. Coupe
Simulation of the long term radiometric responses of the Terra MODIS and EO-1 ALI using Hyperion spectral responses over Railroad Valley Playa in Nevada (RVPN) Simulation of the long term radiometric responses of the Terra MODIS and EO-1 ALI using Hyperion spectral responses over Railroad Valley Playa in Nevada (RVPN)
The Earth Observing-1 (EO-1) Hyperion instrument provides 220 spectral bands with wavelengths between 400 and 2500 nm at 30 m spatial resolution, which covers a 7.5 km by 100 km area on the ground. The EO-1 spacecraft has another multispectral sensor called the Advanced Land Imager (ALI), which has 10 spectral bands with wavelengths between 400 and 2350 nm at 30 m spatial resolution. The...
Authors
Taeyoung Choi, Xiaoxiong Xiong, Amit Angal, Gyanesh Chander
Evaluation of the extent of contamination caused by historical mining in catchments of central Colorado Evaluation of the extent of contamination caused by historical mining in catchments of central Colorado
The U.S. Geological Survey conducted an assessment of stream water and sediment quality in central Colorado, an area of about 54,000 km2. The study area is focused on small tributary catchments in the Rocky Mountains. The Colorado Mineral belt, a northeast-trending mineralized zone that experienced base- and precious-metal mining at the beginning of the late 1800s and early 1900s, cuts...
Authors
Stan E. Church, David L. Fey, Richard B. Wanty, Travis S. Schmidt, T. L. Klein, Barnaby W. Rockwell, Carma A. San Juan
ARCTOS: a relational database relating specimens, specimen-based science, and archival documentation ARCTOS: a relational database relating specimens, specimen-based science, and archival documentation
Data are preserved when they are perpetually discoverable, but even in the Information Age, discovery of legacy data appropriate to particular investigations is uncertain. Secure Internet storage is necessary but insufficient. Data can be discovered only when they are adequately described, and visibility increases markedly if the data are related to other data that are receiving usage...
Authors
Gordon H. Jarrell, Cindy A. Ramotnik, D.L. McDonald
Avalanche ecology and large magnitude avalanche events: Glacier National Park, Montana, USA Avalanche ecology and large magnitude avalanche events: Glacier National Park, Montana, USA
Large magnitude snow avalanches play an important role ecologically in terms of wildlife habitat, vegetation diversity, and sediment transport within a watershed. Ecological effects from these infrequent avalanches can last for decades. Understanding the frequency of such large magnitude avalanches is also critical to avalanche forecasting for the Going-to-the-Sun Road (GTSR). In January...
Authors
Daniel B. Fagre, Erich H. Peitzsch
Differentiating recalcitrant carbon residues in spent oil shale and source rocks Differentiating recalcitrant carbon residues in spent oil shale and source rocks
No abstract available.
Authors
Justin E. Birdwell, Tim E. Ruble, Christopher Laughrey, David Roper, Greg Walker
Implications of ground-deformation measurements across earth fissures in subsidence areas in the southwestern USA Implications of ground-deformation measurements across earth fissures in subsidence areas in the southwestern USA
Ground deformation was monitored at earth fissures in areas of land subsidence induced by groundwater extraction in the southwestern United States. The ground deformation is consistent with the mechanism that fissures are caused by horizontal strains generated by bending of overburden in response to localized differential compaction. Subsidence profiles indicated that localized...
Authors
Thomas L. Holzer
Integrated simulation of consumptive use and land subsidence in the Central Valley, California, for the past and for a future subject to urbanization and climate change Integrated simulation of consumptive use and land subsidence in the Central Valley, California, for the past and for a future subject to urbanization and climate change
Competition for water resources is growing throughout California, particularly in the Central Valley where about 20% of all groundwater used in the United States is consumed for agriculture and urban water supply. Continued agricultural use coupled with urban growth and potential climate change would result in continued depletion of groundwater storage and associated land subsidence...
Authors
Randall T. Hanson, Alan L. Flint, Claudia C. Faunt, Daniel R. Cayan, Lorraine E. Flint, Stanley A. Leake, Wolfgang Schmid
Herbicide treatment of invasive Vinca major growing with endangered Galium buxifolium, an island endemic Herbicide treatment of invasive Vinca major growing with endangered Galium buxifolium, an island endemic
Galium buxifolium E. Greene [Rubiaceae] (sea-cliff bedstraw) is a small shrub restricted to San Miguel and Santa Cruz Islands, in the California Channel Islands. Almost all of the 26 known populations grow on vertical north-facing sea cliffs in native scrub, sandwiched between the sea below and non-native annual grasslands on the terraces above. A notable exception is a popula?tion at...
Authors
Kathryn McEachern, Katie Chess, Karen Flagg, Ken Niessen, Ken Owen, Thompson