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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Multi-level multi-task learning for modeling cross-scale interactions in nested geospatial data
Predictive modeling of nested geospatial data is a challenging problem as the models must take into account potential interactions among variables defined at different spatial scales. These cross-scale interactions, as they are commonly known, are particularly important to understand relationships among ecological properties at macroscales. In this paper, we present a novel, multi-level multi-task
Authors
Shuai Yuan, Jiayu Zhou, Pang-Ning Tan, Emi Fergus, Tyler Wagner, Patricia Sorrano
Radiometric characterization of Landsat Collection 1 products
Landsat data in the U.S. Geological Survey (USGS) archive are being reprocessed to generate a tiered collection of consistently geolocated and radiometrically calibrated products that are suitable for time series analyses. With the implementation of the collection management, no major updates will be made to calibration of the Landsat sensors within a collection. Only calibration parameters needed
Authors
Esad Micijevic, Md Obaidul Haque, Nischal Mishra
Sand pulses and sand patches on the Colorado River in Grand Canyon
Alluvial sandbars occur in lateral recirculation zones (eddies) along the Colorado River in Grand Canyon National Park (Schmidt, 1990). Resource managers periodically release controlled floods from the upstream Glen Canyon Dam to rebuild these bars (Grams et al., 2015), which erode during fluctuating dam releases, and by hillslope runoff and wind deflation (Hazel et al., 2010). Because the dam blo
Authors
Paul E. Grams, Daniel Buscombe, David Topping, Erich R. Mueller
Sea turtles, light pollution, and citizen science: A preliminary report
Sea turtles are an important ecological resource for Gulf Islands National Seashore’s (Gulf Islands) waters and shorelines. Regionally, sea turtles face anthropogenic threats from situations
such as entanglement in fishing gear and ingestion of marine debris, as well as possible changes in sex ratios due to increasing temperatures related to human-induced global warming. Locally, light pollution f
Authors
Heather Afford, Susan Teel, Mark Nicholas, Thomas R. Stanley, Jeremy White
Spatial genetic structure of muskellunge in the Great Lakes region and the effects of supplementation on genetic integrity of remnant stocks
No abstract available.
Authors
Keith N. Turnquist, Wesley Larson, John M. Farrell, P.A. Hanchin, Kevin L. Kapuscinski, Loren M. Miller, Kim T. Scribner, Chris C. Wilson, Brian L. Sloss
The late Cenozoic Eastern California Shear Zone after 25 years of study
No abstract available.
Authors
David M. Miller
The sand dunes of the Colorado River, Grand Canyon, USA
The flow (Wright and Kaplinski, 2011), suspended sediment transport (Topping et al., 2000), sediment storage (Grams et al., 2013), and sedimentology of sandbars (Rubin et al., 1998) of the 250 miles of the Colorado River that run through Grand Canyon National Park have been well studied and described. However, there has been little systematic or synoptic description of the morphologies and sedimen
Authors
Daniel Buscombe, Matthew Kaplinski, Paul E. Grams, Thomas Ashley, Brandon McElroy, David M. Rubin
USGS assessment of water and proppant requirements and water production associated with undiscovered petroleum in the Bakken and Three Forks Formations
The U.S. Geological Survey (USGS) has conducted an assessment of water and proppant requirements, and water production volumes, associated with possible future production of undiscovered petroleum resources in the Bakken and Three Forks Formations, Williston Basin, USA. This water and proppant assessment builds directly from the 2013 USGS petroleum assessment for the Bakken and Three Forks Formati
Authors
Seth S. Haines, Brian A. Varela, Sarah J. Hawkins, Nicholas J. Gianoutsos, Marilyn E. Tennyson
Water-resources and land-surface deformation evaluation studies at Fort Irwin National Training Center, Mojave Desert, California
The U.S. Army Fort Irwin National Training Center (NTC), in the Mojave Desert, obtains all of its potable water supply from three groundwater basins (Irwin, Langford, and Bicycle) within the NTC boundaries (fig. 1; California Department of Water Resources, 2003). Because of increasing water demands at the NTC, the U.S. Geological Survey (USGS), in cooperation with the U.S. Army, completed several
Authors
Jill N. Densmore, Justine E. Dishart, David M. Miller, David C. Buesch, Lyndsay B. Ball, Paul A. Bedrosian, Linda R. Woolfenden, Geoffrey Cromwell, Matthew K. Burgess, Joseph Nawikas, David O'Leary, Adam Kjos, Michelle Sneed, Justin T. Brandt
Geologic characterization of the hydrocarbon resource potential of the Upper Cretaceous Tuscaloosa marine shale in Mississippi and Louisiana, U.S.A.
Recent oil production from the Upper Cretaceous Tuscaloosa marine shale (TMS) has elevated the formation, previously assessed by the USGS in 2011 as part of the Eagle Ford Group, to its own distinct assessment unit for an upcoming assessment. Geologic characterization in preparation for the 2017 assessment has included the analysis of rock samples and produced oils, and the interpretation of well
Authors
Catherine B. Enomoto, Paul C. Hackley, Brett J. Valentine, William A. Rouse, Frank T. Dulong, Celeste D. Lohr, Javin J. Hatcherian
Dynamic optimization of landscape connectivity embedding spatial-capture-recapture information
Maintaining landscape connectivity is increasingly important
in wildlife conservation, especially for species experiencing
the effects of habitat loss and fragmentation. We propose a
novel approach to dynamically optimize landscape connectivity.
Our approach is based on a mixed integer program formulation,
embedding a spatial capture-recapture model that
estimates the density, space usage, and lan
Authors
Yexiang Xue, Xiaojian Wu, Dana J. Morin, Bistra Dilkina, Angela K. Fuller, J. Andrew Royle, Carla P. Gomes
Some results from ModEM3DMT, the freely available OSU 3D MT inversion code
At the 3DEM-5 workshop in 2013, we presented a paper entitled "ModEM: developing 3D EM inversion for the masses", outlining our then recent development of a modular system for inversion of EM geophysical data, called ModEM. As promised in that presentation, we made a version of the code that is suitable for 3D modeling and inversion of magnetotelluric data freely available for academic use shortly
Authors
Gary D. Egbert, Naser Meqbel, Anna Kelbert