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.
Filter Total Items: 5549
Total phosphorus and total nitrogen mass balances for Lago de Cidra Total phosphorus and total nitrogen mass balances for Lago de Cidra
No abstract available.
Authors
Orlando Ramos-Gines
Water budgets of forested and agriculturally-developed watershed in Puerto Rico Water budgets of forested and agriculturally-developed watershed in Puerto Rico
No abstract available.
Authors
Matthew C. Larsen, I.M. Concepcion
Detection of conduit-controlled ground- water flow at selected sites in northwestern Puerto Rico Detection of conduit-controlled ground- water flow at selected sites in northwestern Puerto Rico
No abstract available.
Authors
Jesus Rodriguez-Martinez, R.T. Richards
Mapping global grassland ecosystems: A comparison of four data sets Mapping global grassland ecosystems: A comparison of four data sets
Grassland ecosystems have broad global geographic distribution, occurring in tropical and temperate latitudes and from near sea level to high mountain slopes. The author lists the areas by continent of the world's grasslands as depicted in four global land cover data sets. Grasslands, by definition, include regions where the dominant vegetative cover is herbaceous. Functionally, they...
Authors
J.F. Brown
The implication of a perched-water system based on USW WT-24 hydrochemistry The implication of a perched-water system based on USW WT-24 hydrochemistry
No abstract available.
Authors
Gary L. Patterson, Zell E. Peterman, James B. Paces
Anomalous groundwater 234U/238U beneath Yucca Mountain: Evidence for local recharge? Anomalous groundwater 234U/238U beneath Yucca Mountain: Evidence for local recharge?
No abstract available.
Authors
James B. Paces, K.R. Ludwig, Zell E. Peterman, Leonid A. Neymark, J. M. Kenneally
Inferences for Yucca Mountain unsaturated-zone hydrology from secondary minerals Inferences for Yucca Mountain unsaturated-zone hydrology from secondary minerals
No abstract available.
Authors
James B. Paces, Leonid A. Neymark, Brian D. Marshall, J. F. Whelan, Zell E. Peterman
The collection of clear-water contraction and abutment scour data at selected bridge sites in the coastal plain and piedmont of South Carolina The collection of clear-water contraction and abutment scour data at selected bridge sites in the coastal plain and piedmont of South Carolina
Clear-water contraction and abutment scour data were collected at 128 bridge sites in South Carolina. In the sandy soils of the Coastal Plain, clear-water-scour data were collected at 63 sites (scour depths ranged from 0.4 to 7.2 meters.) In the clayey soils of the Piedmont, clear-water-scour data were collected at 47 sites (scour depths ranged from 0 to 1.4 meters.) In the sandy, clayey...
Authors
Stephen T. Benedict, Andy W. Caldwell
Effects of flooding regime, mycorrhizal inoculation and seedling treatment type on first-year survival of Nuttal Oak (Quercus nuttallii Palmer) Effects of flooding regime, mycorrhizal inoculation and seedling treatment type on first-year survival of Nuttal Oak (Quercus nuttallii Palmer)
Three different types of Nuttall oak (Quercus nuttallii Palmer) seedlings were planted on floodprone, former cropland in Mississippi, Louisiana, and Texas. The three types of 1+0 seedlings planted at each site in January and February of 1995 were bareroot seedlings, seedlings grown in 164 square centimeters plastic containers, and container grown seedlings inoculated with vegetative...
Authors
Virginia Burkett, Hans Williams
Phreatophyte influence on reductive dechlorination in a shallow aquifer containing TCE Phreatophyte influence on reductive dechlorination in a shallow aquifer containing TCE
No abstract available.
Authors
Roger W. Lee, Sonya A. Jones, Eve L. Kuniansky, Gregory J. Harvey, Sandra M. Eberts
2,3,6-/3,4,5-Trimethyl substituted diaryl carotenoid derivatives (Chlorobiaceae) in petroleums of the Belarussian Pripyat River Basin 2,3,6-/3,4,5-Trimethyl substituted diaryl carotenoid derivatives (Chlorobiaceae) in petroleums of the Belarussian Pripyat River Basin
Degradation products of the 2,3,6-/3,4,5-trimethyl substituted analog of isorenieratene were characterized in Belarussian petroleums. Devonian oils of low maturity were found to contain high concentrations (e.g., 35 mg/g) of C40 diaryl isoprenoids (2,3,6-/3,4,5-trimethyl substitution) along with an abundance of maturation-related compounds. A maturation scheme for diaryl carotenoid (2,3...
Authors
D.J. Clifford, J.L. Clayton, Damste J.S. Sinninghe
A nowcast model for tides and tidal currents in San Francisco Bay, California A nowcast model for tides and tidal currents in San Francisco Bay, California
National Oceanographic and Atmospheric Administration (NOAA) installed Physical Oceanographic Real-Time System (PORTS) in San Francisco Bay, California to provide observations of tides, tidal currents, and meteorological conditions. PORTS data are used for optimizing vessel operations, increasing margin of safety for navigation, and guiding hazardous material spill prevention and...
Authors
Ralph T. Cheng, Richard E. Smith