Conference Papers
Science Quality and Integrity
The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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.
Filter Total Items: 5518
Effects of acidic deposition on water quality and forest health in Georgia Effects of acidic deposition on water quality and forest health in Georgia
Biogeochemical studies at the Panola Mountain Research Watershed near Atlanta, Ga., and in the Coastal Plain Province of Georgia have provided an assessment of some of the potential effects of acid deposition on streamwater quality and forest health in Georgia. Historically, "acid rain" has not been considered a potentially serious problem in the southeastern United States; however...
Authors
Thomas G. Huntington, R. P. Hooper
Effects of El Nino on streamflow, lake level, and landslide potential Effects of El Nino on streamflow, lake level, and landslide potential
One of the most important sources of year-to-year climate variation in the Southwest is the El Niño phenomenon of the tropical Pacific Ocean. El Niño is a natural but largely unpredictable condition that results from complex interplay among clouds and storms, regional winds, oceanic temperatures, and ocean currents along the equatorial Pacific. Under "normal" conditions, the tropical...
Authors
Richard L. Reynolds, Michael D. Dettinger, Daniel Cayan, Doyle Stephens, Lynn M. Highland, Raymond C. Wilson
Hydrologic inferences from strontium isotopes in pore water from the unsaturated zone at Yucca Mountain, Nevada Hydrologic inferences from strontium isotopes in pore water from the unsaturated zone at Yucca Mountain, Nevada
Calcite is ubiquitous at Yucca Mountain, occurring in the soils and as fracture and cavity coatings within the volcanic tuff section. Strontium is a trace element in calcite, generally at the tens to hundreds of ppm level. Because calcite contains very little rubidium and the half-life of the 87Rb parent is billions of years, the 87Sr/86Sr ratios of the calcite record the ratio in the...
Authors
Brian D. Marshall, Kiyoto Futa, Zell E. Peterman
Cross‐hole radar attenuation tomography using a frequency centroid down‐shift method: Consideration of non‐linear frequency dependence of EM wave attenuation Cross‐hole radar attenuation tomography using a frequency centroid down‐shift method: Consideration of non‐linear frequency dependence of EM wave attenuation
This paper presents a cross-hole radar attenuation tomography method based on analysis of the down-shift in the spectrum centroid frequency, and spectral broadening of the received radar signals. The method uses a parameter that combines centroid frequency down shift and variance increase for the projection function to construct the tomography algorithm. In comparison with other methods...
Authors
Lanbo Liu, Chaoguang Zhou, John W. Lane, F.P. Haeni
Experimental analysis of debris-flow deposition--process and effects of pore-fluid pressure Experimental analysis of debris-flow deposition--process and effects of pore-fluid pressure
No abstract available.
Authors
Jon J. Major, Richard M. Iverson
Response of flexible wire rope barriers to debris-flow loading Response of flexible wire rope barriers to debris-flow loading
No abstract available.
Authors
Jay S. DeNatale, Gregg L. Fiegel, Richard M. Iverson, Jon J. Major, Richard G. Lahusen, John D. Duffy, Gregory D. Fisher
Offset-vertical seismic profiling for marine gas hydrate exploration: Is it a suitable technique? First results from ODP Leg 164 Offset-vertical seismic profiling for marine gas hydrate exploration: Is it a suitable technique? First results from ODP Leg 164
Walkaway vertical seismic profiles were acquired during Ocean Drilling Project (ODP) Leg 164 at the Blake Ridge to investigate seismic properties of hydrate-bearing sediments and the zone of free gas beneath them. An evaluation of compressional (P-) wave arrivals Site 994 indicates P-wave anisotrophy in the sediment column. We identified several shear (S-) wave arrivals in the horizontal
Authors
I.A. Pecher, W.S. Holbrook, R.A. Stephen, H. Hoskins, D. Lizarralde, D. R. Hutchinson, W.T. Wood
A plan to assess native and exotic plant diversity and cryptobiotic crusts in the Grand Staircase-Escalante National Monument A plan to assess native and exotic plant diversity and cryptobiotic crusts in the Grand Staircase-Escalante National Monument
No abstract available.
Authors
Thomas J. Stohlgren, Jayne Belnap, G.W. Chong, R.M. Reich
A resource in crisis: Changing the measure of salmon management A resource in crisis: Changing the measure of salmon management
No abstract available.
Authors
C.A. Frissell, W.J. Liss, R. E. Gresswell, R.K. Nawa
Bobcat (Felis rufus) ecology and management Bobcat (Felis rufus) ecology and management
The bobcat (Felis rufus) is a medium sized predator in the family Felidae found exclusively in North America. Extensive natural history information is available and is summarized in several bibliographies and reviews (Sweeny and Poelker 1977, McCord and Cardoza 1982, Boddicker 1983, Anderson 1987, Rolley 1987). The bobcat is a spotted cat with a short white-tipped tail, small dark ear...
Authors
Judd A. Howell
Ecological risk analysis of a piscivorous fish introduction into the Yellowstone Lake ecosystem Ecological risk analysis of a piscivorous fish introduction into the Yellowstone Lake ecosystem
No abstract available.
Authors
Robert E. Greswell, H. Li