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.
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Fractures, stress and fluid flow prior to stimulation of well 27-15, Desert Peak, Nevada, EGS project Fractures, stress and fluid flow prior to stimulation of well 27-15, Desert Peak, Nevada, EGS project
A suite of geophysical logs has been acquired for structural, fluid flow and stress analysis of well 27-15 in the Desert Peak Geothermal Field, Nevada, in preparation for stimulation and development of an Enhanced Geothermal System (EGS). Advanced Logic Technologies Borehole Televiewer (BHTV) and Schlumberger Formation MicroScanner (FMS) image logs reveal extensive drilling-induced...
Authors
Nicholas C. Davatzes, Stephen H. Hickman
Hydrogeologic characteristics and water levels of Wilcox aquifer in southwestern and northeastern Arkansas Hydrogeologic characteristics and water levels of Wilcox aquifer in southwestern and northeastern Arkansas
The Wilcox Group of Eocene and Paleocene age is located throughout most of southern and eastern Arkansas. The Wilcox Group in southern Arkansas is undifferentiated, while in northeastern Arkansas, the Wilcox Group is subdivided into three units: Flour Island, Fort Pillow Sand, and Old Breastworks Formation. The Wilcox Group crops out in southwestern Arkansas in discontinuous, 1 to 3 mi...
Authors
Aaron L. Pugh, Tony P. Schrader
Status and conservation of lampreys in California Status and conservation of lampreys in California
Abstract.—Lampreys are among the least studied group of fishes in California. At least seven species inhabit freshwater habitats within the state, including the Kern brook lamprey Lampetra hubbsi, a California endemic. Four species are micropredators on fish, Pacific lamprey Entosphenus tridentatus (formerly L. tridentata), river lamprey L. ayresii, Klamath lamprey E. similis (formerly L...
Authors
Peter B. Moyle, Larry R. Brown, Shawn D. Chase, Rebecca M. Quinones
Accuracy assessment of a 300 m global land cover map—The GlobCover experience Accuracy assessment of a 300 m global land cover map—The GlobCover experience
No abstract available.
Authors
Pierre Defourny, L. Schouten, S. Bartalev, S. Bontemps, P. Caccetta, A.J.W. de Wit, C. Di Bella, B. Gerard, Chandra Giri, G. Vond, G.W. Hazeu, A. Heinimann, M. Herold, J. Knoops, G. Jaffrain, R. Latifovic, H. Lin, P. Mayaux, C.W. Mucher, A. Nonguierma, H.-J. Stibig, E. Van Bogaert, C. Vancutsem, P. Bicheron, M. Leroy, O. Arino
Ecosystem modeling based upon remote sensing, site potential, and weather to monitor vegetation responses to climate, management, and disturbances Ecosystem modeling based upon remote sensing, site potential, and weather to monitor vegetation responses to climate, management, and disturbances
No abstract available.
Authors
Bruce K. Wylie, Jennifer Rover, K. Murnaghan, Larry L. Tieszen, Brian Brisco
Labeling landscape changes through automated disturbance vector matching Labeling landscape changes through automated disturbance vector matching
No abstract available.
Authors
Kurtis Nelson, Birgit Peterson
Evaluation of flow structure and bed load velocity in the vicinity of a submerged wing dike in a large sand bed river Evaluation of flow structure and bed load velocity in the vicinity of a submerged wing dike in a large sand bed river
No abstract available.
Authors
E. C. Jamieson, C. D. Rennie, R. B. Jacobson
Research and conservation activities in Florida 2009 Research and conservation activities in Florida 2009
No abstract available.
Authors
Noel Burkhead
Pelagic habitat visualization: the need for a third (and fourth) dimension: HabitatSpace Pelagic habitat visualization: the need for a third (and fourth) dimension: HabitatSpace
Habitat in open water is not simply a 2-D to 2.5-D surface such as the ocean bottom or the air-water interface. Rather, pelagic habitat is a 3-D volume of water that can change over time, leading us to the term habitat space. Visualization and analysis in 2-D is well supported with GIS tools, but a new tool was needed for visualization and analysis in four dimensions. Observational data...
Authors
C J Beegle-Krause, Tiffany Vance, Debbie Reusser, David Stuebe, Eoin Howlett
Inversion of multichannel geophysical data with projected kernels Inversion of multichannel geophysical data with projected kernels
Statistical de‐noising methods such as Principal Component Analysis modify data in a way not constrained by physics. In much the same way as frequency‐filtered data must incorporate altered frequency content into numerical interpretation, so must statistically rotated data include the rotation operator in inversion processes. We propose a method of accounting for statistical reduction of...
Authors
M. Andy Kass, Trevor P. Irons, Yaoguo Li