Use of a spatial decision support system for analysis of habitat use by wintering northern pintails
Clinton W. Jeske, W. Ji, Paul C. Chadwick, W. Norling, M. C. Finley
1997, Conference Paper, Effect of habitat loss and change on waterbirds
A multi-functional spatial decision support system (SDSS) was,developed at the spatial analysis branch Of the National Wetlands Research Center, and the wildlife analysis module of the system was used to study habitat use by wintering pintail. We instrumented female pintails at Catahoula Lake, Louisiana, in October of 1992-94 and located...
The frequency and intensity of Atlantic hurricanes and their influence on the structure of south Florida mangrove communities
Thomas W. Doyle, Garrett F. Girod
1997, Book chapter, Hurricanes: Climate and socioeconomic impacts
Hurricanes are formidable forces that wreak havoc on society and nature alike. Mangrove ecosystems are especially vulnerable because they thrive in the intertidal zone of tropical regions where hurricanes originate and are most frequent. Because mangroves are found at the land-sea interface where hurricanes are often most intense, these coastal...
Restoration of mangrove ecosystems after an oil spill
C. Edward Proffitt, Donna Devlin, Thomas W. Doyle
1997, Conference Paper, Managing oil spills in mangrove ecosystems: Effects, remediation, restoration, and modeling: A review produced from a workshop convened August 1995 at McNeese State University
No abstract available....
Feather mineral content of redheads (Aythya americana) wintering along the Gulf of Mexico
Steven B. Murden, Marc C. Woodin, Thomas C. Michot, Milton W. Weller, Joseph L. Moore, S.E. Adair, K.L. Risenhoover
1997, Conference Paper, Limnology and waterfowl: Monitoring, modelling and management
No abstract available....
Hydrologic inferences from strontium isotopes in pore water from the unsaturated zone at Yucca Mountain, Nevada
Brian D. Marshall, Kiyoto Futa, Zell E. Peterman
1997, Conference Paper, Proceedings of FTAM: Field testing and associated modeling of potential high-level nuclear waste geologic disposal sites
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...
Preliminary results of the first scientific Drilling on Lake Baikal, Buguldeika site, southeastern Siberia
Douglas F. Williams, S. Colman, M. Grachev, P. Hearn, Shoji Horie, T. Kawai, Mikhail I. Kuzmin, N. Logachov, V. Antipin, A. Bardardinov, A. Bucharov, V. Fialkov, A. Gorigljad, B. Tomilov, B.N. Khakhaev, S. Kochikov, N. Logachev, L.A. Pevzner, E.B. Karabanov, V. Mats, E. Baranova, O. Khlystov, E. Khrachenko, M. Shimaraeva, E. Stolbova, S. Efremova, A. Gvozdkov, A. Kravchinski, J. Peck, T. Fileva, S. Kashik, T. Khramtsova, I. Kalashnikova, T. Rasskazova, V. Tatarnikova, Richard Yuretich, V. Mazilov, K. Takemura, V. Bobrov, T. Gunicheva, H. Haraguchi, S. Ito, T. Kocho, M. Markova, V. Pampura, O. Proidakova, R. Ishiwatari, H. Sawatari, A. Takeuchi, K. Toyoda, S. Vorobieva, A. Ikeda, A. Marui, T. Nakamura, K. Ogura, Takeshi Ohta, J. King, H. Sakai, T. Yokoyama, A. Hayashida, E. Bezrukova, S. Fowell, N. Fujii, P. Letunova, V. Misharina, N. Miyoshi, G. Chernyaeva, I. Ignatova, E. Likhoshvai, L. Granina, O. Levina, P. Dolgikh, F. Lazo, N. Lutskaia, W. Orem, E. Wada, K. Yamada, S. Yamada, E. Callander, L. Golobokoval, W. C. Pat Shanks, R. Dorofeeva, A. Duchkov
1997, Quaternary International (37) 3-17
The Baikal Drilling Project (BDP) is a multinational effort to investigate the paleoclimatic history and tectonic evolution of the Baikal sedimentary basin during the Late Neogene. In March 1993 the Baikal drilling system was successfuly deployed from a barge frozen into position over a topographic high, termed the Buguldeika saddle,...
Offset-vertical seismic profiling for marine gas hydrate exploration: Is it a suitable technique? First results from ODP Leg 164
I.A. Pecher, W.S. Holbrook, R.A. Stephen, H. Hoskins, D. Lizarralde, D. R. Hutchinson, W.T. Wood
1997, Conference Paper, Offshore Technology Conference 29th Annual, Proceedings
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...
Morphology and stratal geometry of the Antarctic continental shelf: Insights from models
Alan K. Cooper, Peter F. Barker, Giuliano Brancolini
1997, Book chapter, Geology and Seismic Stratigraphy of the Antarctic Margin
Reconstruction of past ice-sheet fluctuations from the stratigraphy of glaciated continental shelves requires understanding of the relationships among the stratal geometry, glacial and marine sedimentary processes, and ice dynamics. We investigate the formation of the morphology and the broad stratal geometry of topsets on the Antarctic continental shelf with numerical...
Characterization of the Martian surface deposits by the Mars Pathfinder rover, Sojourner
Jacob R. Matijevic, J. Crisp, Donald B. Bickler, R. S. Banes, B. K. Cooper, Howard J. Eisen, J. Gensler, A. Haldemann, F. Hartman, K. A. Jewett, L. H. Matthies, S. L. Laubach, A. H. Mishkin, J. C. Morrison, T. T. Nguyen, A. R. Sirota, H. W. Stone, S. Stride, L. F. Sword, J. A. Tarsala, A. D. Thompson, M. T. Wallace, R. Welch, E. Wellman, B. H. Wilcox, D. Ferguson, P. Jenkins, J. Kolecki, G. A. Landis, D. Wilt, H. J. Moore, F. Pavlics
1997, Science (278) 1765-1768
Sojourner, the Mars Pathfinder rover, discovered pebbles on the surface and in rocks that may be sedimentary—not volcanic—in origin. Surface pebbles may have been rounded by Ares flood waters or liberated by weathering of sedimentary rocks called conglomerates. Conglomerates imply that water existed elsewhere and earlier than the Ares flood....
Results from the Mars Pathfinder camera
P. H. Smith, J. F. Bell, N. T. Bridges, D.T. Britt, Lisa R. Gaddis, R. Greeley, H.U. Keller, Kenneth E. Herkenhoff, R. Jaumann, J. R. Johnson, Randolph L. Kirk, M. Lemmon, J.N. Maki, M.C. Malin, S.L. Murchie, J. Oberst, T. J. Parker, R.J. Reid, R.M. Sablotny, Laurence A. Soderblom, C. Stoker, R. Sullivan, N. Thomas, M.G. Tomasko, W. Ward, E. Wegryn
1997, Science (278) 1758-1765
Images of the martian surface returned by the Imager for Mars Pathfinder (IMP) show a complex surface of ridges and troughs covered by rocks that have been transported and modified by fluvial, aeolian, and impact processes. Analysis of the spectral signatures in the scene (at 440- to 1000-nanometer wavelength) reveal...
Post seismic deformation associated with the 1992 Mω = 7.3 Landers earthquake, southern California
James C. Savage, Jerry L. Svarc
1997, Journal of Geophysical Research B: Solid Earth (102) 7565-7577
Following the 1992 Mω=7.3 Landers earthquake, a linear array of 10 geodetic monuments at roughly 5‐km spacing was established across the Emerson fault segment of the Landers rupture. The array trends perpendicular to the local strike of the fault segment and extends about 30 km on either side of it. The...
Digital-map grids of mean-annual precipitation for 1961-90, and generalized skew coefficients of annual maximum streamflow for Oklahoma
A. H. Rea, R. L. Tortorelli
1997, Open-File Report 97-574
This digital report contains two digital-map grids of data that were used to develop peak-flow regression equations in Tortorelli, 1997, 'Techniques for estimating peak-streamflow frequency for unregulated streams and streams regulated by small floodwater retarding structures in Oklahoma,' U.S. Geological Survey Water-Resources Investigations Report 97-4202. One data set is a...
Relations of Tualatin River water temperatures to natural and human-caused factors
John C. Risley
1997, Water-Resources Investigations Report 97-4071
Aquatic research has long shown that the survival of cold-water fish, such as salmon and trout, decreases markedly as water temperatures increase above a critical threshold, particularly during sensitive life stages of the fish. In an effort to improve the overall health of aquatic ecosystems, the State of Oregon in...
Light attenuation in a shallow, turbid reservoir, Lake Houston, Texas
Roger W. Lee, Walter Rast
1997, Water-Resources Investigations Report 97-4064
Results of measurements of light penetration at sites in Lake Houston near Houston, Texas, indicate that light-extinction coefficients during 1989– 90 range from about 2.49 to 7.93 meters-1 and euphotic zone depth ranges from about 0.61 to 1.85 meters. The coefficients are largest near the inflow site of West Fork...
Tritium, deuterium, and oxygen-18 in water collected from unsaturated sediments near a low-level radioactive-waste burial site south of Beatty, Nevada
David E. Prudic, David A. Stonestrom, Robert G. Striegl
1997, Water-Resources Investigations Report 97-4062
Pore water was extracted in March 1996 from cores collected from test holes UZB-1 and UZB-2 drilled November 1992 and September 1993, respectively, in the Amargosa Desert south of Beatty, Nevada. The test holes are part of a study to determine factors affecting water and gas movement through unsaturated sediments....
Chicxulub impact event; computer animations and paper models
T. R. Alpha, J. P. Galloway, S. W. Starratt
1997, Open-File Report 97-442-B
Hydrogeologic data for the Blaine aquifer and associated units in southwestern Oklahoma and northwestern Texas
D. L. Runkle, D. L. Bergman, R.S. Fabian
1997, Open-File Report 97-50
This report is a compilation of hydrogeologic data collected for an areal ground-water investigation of the Blaine aquifer and associated units in southwestern Oklahoma and northwestern Texas. The study area includes parts of Greer, Harmon, and Jackson counties in Oklahoma and parts of Childress, Collingsworth, Hall, Hardeman, and Wilbarger counties...
Estimates of bridge scour at two sites on the Virgin River, southeastern Nevada, using a sediment-transport model and historical geomorphic data
M.M. Hilmes, J. E. Vaill
1997, Water-Resources Investigations Report 97-4073
A bridge-scour study by the U.S. Geological Survey, in cooperation with the Nevada Department of Transportation, began in April 1996 to evaluate the Mesquite, Nevada, and Riverside, Nevada, bridges on the lower Virgin River using a sediment-transport model and historical geomorphic data. The BRIdge Stream Tube model for Alluvial River...
Water-supply potential of major streams and the Upper Floridan Aquifer in the vicinity of Savannah, Georgia
Reggina Garza, Richard E. Krause
1997, Water Supply Paper 2411
Surface- and ground-water resources in the Savannah, Georgia, area were evaluated for potential water-supply development. Stream-discharge and water-quality data were analyzed for two major streams considered to be viable water-supply sources. A ground-water flow model was developed to be used in conjunction with other previously calibrated models to simulate the...
Simulation of ground-water flow and application to the design of a contaminant removal system, Loring Air Force Base, Maine
J.J. Starn
1997, Water-Resources Investigations Report 97-4055
The fractured-bedrock aquifer underlying the former Fire Training Area at Loring Air Force Base, Maine, has been contaminated with petroleum products as a result of fire training activities. A numerical model of the ground-water-flow system near the Fire Training Area was developed to provide information for the design and operation...
Perception of neighboring plants by rhizomes and roots: Morphological manifestations of a clonal plant
Elisabeth Huber-Sannwald, M. M. Caldwell, David A. Pyke
1997, Canadian Journal of Botany (75) 2146-2157
A previous study showed that clonal morphology of the rhizomatous grass Elymus lanceolatus ssp. lanceolatus (Scibner & J.G. Smith Gould) was influenced more by neighbouring root systems than by the local distribution of nutrients. In this study we determine whether individual rhizomes or roots of E. lanceolatus perceive neighbouring root systems and how this is manifested in...
Preliminary geologic map of the San Fernando 7.5' quadrangle, southern California: A digital database
R.F. Yerkes
1997, Open-File Report 97-163
The city of San Fernando sits atop a structurally complex, sedimentologically diverse, and tectonically evolving late Tertiary-Quaternary basin situated within the Transverse Ranges of southern California. The surrounding San Fernando Valley (SFV) contains the headwaters of the Los Angeles River and its tributaries. Prior to the advent of flood control,...
Preliminary geologic map of the Mint Canyon 7.5' quadrangle, southern California: A digital database
R.F. Yerkes
1997, Open-File Report 97-164
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map...
Preliminary geologic map of the Burbank 7.5' quadrangle, southern California: A digital database
R.F. Yerkes
1997, Open-File Report 97-166
This Open-File report is a digital geologic map database. This pamphlet serves to introduce and describe the digital data. There is no paper map included in the Open-File report. This digital map database is compiled from previously published sources combined with some new mapping and modifications in nomenclature. The geologic map...
USGS gamma-ray modeling programs
J. S. Duval
1997, Open-File Report 97-96
