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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Long-term continuous acoustical suspended-sediment measurements in rivers – Theory, evaluation, and results from 14 stations on five rivers
We have developed a physically based method for using two acoustic frequencies to measure suspended-silt-and-clay concentration, suspended-sand concentration, and suspended-sand median grain size in river cross sections at 15-minute intervals over decadal timescales. The method is strongly grounded in the extensive scientific literature on the scattering of sound by suspensions of small particles
Authors
David Topping, Scott A. Wright, Ronald E. Griffiths, David Dean
Migratory bird habitat in relation to tile drainage and poorly drained hydrologic soil groups
The Prairie Pothole Region (PPR) is home to more than 50% of the migratory waterfowl in North America. Although the PPR provides an abundance of temporary and permanent wetlands for nesting and feeding, increases in commodity prices and agricultural drainage practices have led to a trend of wetland drainage. The Northern Shoveler is a migratory dabbling duck species that uses wetland habitats and
Authors
Brandi Kastner, Victoria G. Christensen, Tanja N. Williamson, Christopher A. Sanocki
Learning from the recent Taiwan Meinong Earthquake
This paper highlights the lessons learned following a reconnaissance trip to Tainan, Taiwan two weeks after the February 2016 earthquake. The reconnaissance was conducted by Gilsanz, Murray Steficek engineers (GMS) and an earthquake engineer from the United States Geological Survey (USGS), in collaboration with the Earthquake Engineering Research Institute (EERI), the Applied Technical Council (AT
Authors
Ramon Gilsanz, Cathy Huang, Jessica Mandrick, Joe Mugford, Cerea Steficek, Mehmet Çelebi, Sheng-Jhih Jhuang
Undergraduate research projects help promote diversity in the geosciences
A workforce that draws from all segments of society and mirrors the ethnic, racial, and gender
diversity of the United States population is important. The geosciences (geology, hydrology,
geospatial sciences, environmental sciences) continue to lag far behind other science, technology,
engineering and mathematical (STEM) disciplines in recruiting and retaining minorities (Valsco
and Valsco, 20
Authors
De'Etra Young, Shannon Trimboli, Rick S. Toomey, Thomas D. Byl
Enriching the national map database for multi-scale use: Introducing the visibilityfilter attribution
The US Geological Survey’s (USGS) National Geospatial Technical Operations Center is prototyping and evaluating the ability to filter data through a range of scales using 1:24,000-scale The National Map (TNM) datasets as the source. A “VisibilityFilter” attribute is under evaluation that can be added to all TNM vector data themes and will permit filtering of data to eight target scales between 1:2
Authors
Andrew J. Stauffer, Seth Webinger, Brittany Roche
First steps for mitigating bycatch of Pink-footed Shearwaters Ardenna creatopus: Identifying overlap of foraging areas and fisheries in Chile
The Pink-footed Shearwater, Ardenna creatopus, is listed as in danger of extinction by Chile and under Annex 1 of ACAP, with an estimated global population of approximately 56,000 individuals. Incidental bycatch of this species in fisheries is thought to be an important cause in population decline (i.e. annual estimated mortality of >1000 adults).
This species is an endemic breeder in Chile, nest
Authors
Ryan Carle, Jonathan J. Felis, Verónica López, Josh Adams, Peter Hodum, Jessie Beck, Valentina Colodro, Rodrigo Vega, Andrés González
Landsat-7 ETM+ radiometric calibration status
Now in its 17th year of operation, the Enhanced Thematic Mapper + (ETM+), on board the Landsat-7 satellite, continues to systematically acquire imagery of the Earth to add to the 40+ year archive of Landsat data. Characterization of the ETM+ on-orbit radiometric performance has been on-going since its launch in 1999. The radiometric calibration of the reflective bands is still monitored using on-b
Authors
Julia A. Barsi, Brian L. Markham, J. S. Czapla-Myers, Dennis L. Helder, Simon Hook, John R. Schott, Md Obaidul Haque
Migratory routes and at-sea threats to Pink-footed Shearwaters
The Pink-footed Shearwater (Ardenna creatopus) is a seabird with a breeding range restricted to three islands in Chile and an estimated world population of approximately 56,000 breeding individuals (Muñoz 2011, Oikonos unpublished data). Due to multiple threats on breeding colonies and at-sea, Pink-footed Shearwaters are listed as Endangered by the government of Chile (Reglamento de Clasificación
Authors
Josh Adams, Jonathan J. Felis, Peter Hodum, Valentina Colodro, Ryan Carle, Verónica López
Radiometric calibration updates to the Landsat collection
The Landsat Project is planning to implement a new collection management strategy for Landsat products generated at the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center. The goal of the initiative is to identify a collection of consistently geolocated and radiometrically calibrated images across the entire Landsat archive that is readily suitable for time-series
Authors
Esad Micijevic, Md Obaidul Haque, Nischal Mishra
Seiche-induced unsteady flows in the Huron-Erie Corridor: Spectral analysis of oscillations in stage and discharge in the St. Clair and Detroit Rivers
Animations of highly dynamic water-surface profiles through the St. Clair and Detroit Rivers have identified transient disturbances propagating from Lakes Huron and Erie into the St. Clair and Detroit Rivers, respectively. To determine any relation to seiche and tidal oscillations on Lakes Huron
and Erie, a spectral analysis was performed on stage and discharge data from the Huron-Erie Corridor.
Authors
P. Ryan Jackson
Three-dimensional numerical modeling of mixing at the junction of the Calumet-Sag Channel and the Chicago Sanitary and Ship Canal: A comparison between density-driven and advection-driven mixing
The Chicago Area Waterway System (CAWS) includes the Chicago Sanitary and Ship Canal (CSSC) and the Calumet-Sag Channel (Cal-Sag), the two primary, man-made connections between the Mississippi River Basin and the Great Lakes. The U.S. Geological Survey (USGS) monitors diversion of Great Lakes water at a streamgage just downstream of the confluence of the CSSC and Cal-Sag (known as Sag Junction). P
Authors
Dongchen Wang, Som Dudda, P. Ryan Jackson, Marcelo H. Garcia
Validation of the ASTER Global Digital Elevation Model version 3 over the conterminous United States
The ASTER Global Digital Elevation Model Version 3 (GDEM v3) was evaluated over the conterminous United States in a manner similar to the validation conducted for the original GDEM Version 1 (v1) in 2009 and GDEM Version 2 (v2) in 2011. The absolute vertical accuracy of GDEM v3 was calculated by comparison with more than 23,000 independent reference geodetic ground control points from the U.S. Nat
Authors
Dean B. Gesch, Michael J. Oimoen, Jeffrey J. Danielson, David Meyer