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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Application of frequency- and time-domain electromagnetic surveys to characterize hydrostratigraphy and landfill construction at the Amargosa Desert Research Site, Beatty, Nevada
In 2014 and 2015, the U.S. Geological Survey (USGS), conducted frequency-domain electromagnetic (FDEM) surveys at the USGS Amargosa Desert Research Site (ADRS), approximately 17 kilometers (km) south of Beatty, Nevada. The FDEM surveys were conducted within and adjacent to a closed low-level radioactive waste disposal site located at the ADRS. FDEM surveys were conducted on a grid of north-south a
Authors
Eric A. White, Frederick D. Day-Lewis, Carole D. Johnson, John W. Lane
Bed texture mapping in large rivers using recreational-grade sidescan sonar
The size-distribution and spatial organization of bed sediment, or bed ‘texture’, is a fundamental attribute of natural channels and is one important component of the physical habitat of aquatic ecosystems. ‘Recreational-grade’ sidescan sonar systems now offer the possibility of imaging, and subsequently quantifying bed texture at high resolution with minimal cost, or logistical effort. We are inv
Authors
Daniel Hamill, Joseph M. Wheaton, Daniel D. Buscombe, Paul E. Grams, Theodore S. Melis
Case study: 2016 Natural glide and wet slab avalanche cycle, Going-to-the-Sun Road, Glacier National Park, Montana, USA
The Going-to-the-Sun Road (GTSR) is the premier tourist attraction in Glacier
National Park, Montana. The GTSR also traverses through and under 40 avalanche paths which
pose a hazard to National Park Service (NPS) road crews during the annual spring snow plowing
operation. Through a joint collaboration between the NPS and the U.S. Geological Survey
(USGS), a forecasting program primarily dealing w
Authors
Jacob Hutchinson, Erich H. Peitzsch, Adam Clark
Development of an adaptive harvest management program for Taiga bean geese
This report describes recent progress in specifying the elements of an adaptive harvest program for taiga bean goose. It describes harvest levels appropriate for first rebuilding the population of the Central Management Unit and then maintaining it near the goal specified in the AEWA International Single Species Action Plan (ISSAP). This report also provides estimates of the length of time it woul
Authors
Fred A. Johnson, Mikko Alhainen, Anthony D. Fox, Jesper Madsen
Does paleoseismology forecast the historic rates of large earthquakes on the San Andreas fault system?
The 98-year open interval since the most recent ground-rupturing earthquake in the greater San Andreas boundary fault system would not be predicted by the quasi-periodic recurrence statistics from paleoseismic data. We examine whether the current hiatus could be explained by uncertainties in earthquake dating. Using seven independent paleoseismic records, 100 year intervals may have occurred circ
Authors
Glenn Biasi, Katherine M. Scharer, Ray J. Weldon, Timothy E. Dawson
Federal collaboration in science for invasive mammal management in U.S. National Parks and Wildlife Refuges of the Pacific Islands
Some of the most isolated islands in the Pacific Ocean are home to US National Parks and Wildlife Refuges. These islands are known for flora and fauna that occur nowhere else, but also for invasive species and other factors which have resulted in the disproportionate extinction of native species. The control of invasive mammals is the single most expensive natural resource management activity esse
Authors
Steven C. Hess, Darcy Hu, Rhonda Loh, Paul C. Banko
Late Quaternary offset of alluvial fan surfaces along the Central Sierra Madre Fault, southern California
The Sierra Madre Fault is a reverse fault system along the southern flank of the San Gabriel Mountains near Los Angeles, California. This study focuses on the Central Sierra Madre Fault (CSMF) in an effort to provide numeric dating on surfaces with ages previously estimated from soil development alone. We have refined previous geomorphic mapping conducted in the western portion of the CSMF near Pa
Authors
Reed J. Burgette, Austin Hanson, Katherine M. Scharer, Nikolas Midttun
Statistical comparison of methods for estimating sediment thickness from Horizontal-to-Vertical Spectral Ratio (HVSR) seismic methods: An example from Tylerville, Connecticut, USA
Determining sediment thickness and delineating bedrock topography are important for assessing groundwater availability and characterizing contamination sites. In recent years, the horizontal-to-vertical spectral ratio (HVSR) seismic method has emerged as a non-invasive, cost-effective approach for estimating the thickness of unconsolidated sediments above bedrock. Using a three-component seismomet
Authors
Carole D. Johnson, John W. Lane
Testing geomorphology-derived rupture histories against the paleoseismic record of the southern San Andreas fault
Evidence for the 340-km-long Fort Tejon earthquake of 1857 is found at each of the high-resolution paleoseismic sites on the southern San Andreas Fault. Using trenching data from these sites, we find that the assemblage of dated paleoearthquakes recurs quasi-periodically (coefficient of variation, COV, of 0.6, Biasi, 2013) and requires ~80% of ruptures were shorter than the 1857 rupture with an av
Authors
Katherine M. Scharer, Ray J. Weldon, Sean Bemis
Timing of spring wild turkey hunting in relation to nest incubation
State wildlife agencies are often requested to open spring wild turkey (Meleagris gallopavo; hereafter, turkey) hunting seasons earlier to increase hunter satisfaction by hunters hearing more gobbling male turkeys. Timing of spring turkey hunting season in several states, including Pennsylvania, has been established to open, on average, near median date of incubation initiation of turkey nests. Th
Authors
Mary Jo Casalena, Rex Everett, Wendy C. Vreeland, Ian D. Gregg, Duane R. Diefenbach
Use of repeat surveys and flow and sediment transport modeling to support fish spawning reef placement in the Detroit River, MI
The introduction of rock-rubble substrate in rivers, to enhance fish spawning habitat, represents a significant investment in planning, permitting and construction. Where river processes deposit sediment and cover the substrate, its value as fish spawning habitat can be diminished. Therefore, it is crucial in the site se-lection process, that substrate be placed in locations that benefit the fish
Authors
Paul J. Kinzel, Jonathan M. Nelson, Gregory W. Kennedy, David Bennion
Using structure from motion photogrammetry to examine glide snow avalanches
Structure from Motion (SfM), a photogrammetric technique, has been used extensively
and successfully in many fields including geosciences over the past few years to create 3D models and
high resolution digital elevation models (DEMs) from aerial or oblique photographs. SfM has recently
been used in a limited capacity in snow avalanche research and shows promise as a tool for broader applications.
Authors
Erich H. Peitzsch, Jordy Hendrikx, Daniel B. Fagre