Extreme fractionation of 234U 238U and 230Th 234U in spring waters, sediments, and fossils at the Pomme de Terre Valley, southwestern Missouri
Barney J. Szabo
1982, Geochimica et Cosmochimica Acta (46) 1675-1679
Isotopic fractionation as great as 1600% exists between 234U and 238U in spring waters, sediments, and fossils in the Pomme de Terre Valley, southwestern Missouri. The activity ratios of 234U238U">234U238U in five springs range from 7.2 to 16 in water which has been discharged for at least the...
Decline of lake herring (Coregonus artedii) in Lake Superior: an analysis of the Wisconsin herring fishery, 1936-78
James H. Selgeby
1982, Canadian Journal of Fisheries and Aquatic Sciences (39) 554-563
Annual harvests of lake herring (Coregonus artedii) in American waters of Lake Superior declined from an average of 2 million kg in 1936–62 to less than 25 000 kg in 1978. Analysis of commercial fishing records revealed that the sequential overexploitation of discrete unit stocks caused the collapse of the herring population...
Digital observations on the use of satellite remote sensing imagery with regard to Chinese alligator habitat
M. E. Watanabe, Alta S. Walker, H. Churchien
1982, Ziran Zazhi (5) 852-854
No abstract available....
Volatilization of organic compounds from streams
Ronald E. Rathburn, D. Y. Tai
1982, Journal of Environmental Engineering (108) 973-989
Mass-transfer coefficients for the volatilization of ethylene and propane were correlated with the hydraulic and geometric properties of seven streams, and predictive equations were developed. The equations were evaluated using a normalized root-mean-square error as the criterion of comparison. The two best equations were a two-variable equation containing the energy...
Acid rain, air pollution, and tree growth in southeastern New York
L.J. Puckett
1982, Journal of Environmental Quality (11) 376-381
Whether dendroecological analyses could be used to detect changes in the relationship of tree growth to climate that might have resulted from chronic exposure to components of the acid rain-air pollution complex was determined. Tree-ring indices of white pine (Pinus strobus L.), eastern hemlock (Tsuga canadensis (L.) Cart.), pitch pine...
Population and status of Emperor Geese along the north side of the Alaska Peninsula
Margaret R. Petersen, Robert E. Gill Jr.
1982, Wildfowl (33) 31-38
We gathered information on the timing of spring and autumn migration of Emperor Geese Anser canagicus from Nelson Lagoon, the age ratios of geese during autumn migration, and the numbers of geese in estuaries along the north side of the Alaska Peninsula and Bristol Bay during spring and autumn migration....
Rifting history and structural development of the continental margin north of Alaska
Arthur Grantz, S. D. May
1982, Book chapter, M 34: Studies in continental margin geology
Seismic-reflection profiles in the Alaskan Beaufort Sea and onshore geology indicate that the continental margin north of Alaska is of Atlantic type. Rifting appears to have begun in earliest Jurassic time, about 190 to 185 m.y. ago, when crustal extension created a rift-valley system beneath the Beaufort shelf and part...
Variability in nest survival rates and implications to nesting studies
Albert T. Klett, Douglas H. Johnson
1982, The Auk (99) 77-87
We used four reasonably large samples (83-213) of Mallard (Anas platyrhynchos) and Blue-winged Teal (A. discors) nests on an interstate highway right-of-way in southcentral North Dakota to evaluate potential biases in hatch-rate estimates. Twelve consecutive, weekly searches for nests were conducted with a cable-chain drag in 1976 and 1977. Nests...
Portable precision dc voltage-current transfer standard for electrometer calibration
G. Landis, M. Godwin
1982, Review of Scientific Instruments (53) 1290-1291
A circuit design is presented for an instrument providing a highly stable and fully adjustable voltage and current in the range of 0-1.999 V or 0-199.9 mV and 10-11-10-15 A. This instrument is used to verify the calibration and performance of dc and vibrating reed electrometers and chart recorders on...
Gravity measurements useful in the preliminary evaluation of the Nimiuktuk barite deposit, Alaska
D.F. Barnes, C.F. Mayfield, R. L. Morin, S. Brynn
1982, Economic Geology (77) 185-189
No abstract available....
Analytical electron microscopy in mineralogy; exsolved phases in pyroxenes
Gordon L. Nord Jr.
1982, Ultramicroscopy (8) 109-119
Analytical scanning transmission electron microscopy has been successfully used to characterize the structure and composition of lamellar exsolution products in pyroxenes. At operating voltages of 100 and 200 keV, microanalytical techniques of x-ray energy analysis, convergent-beam electron diffraction, and lattice imaging have been used to chemically and...
Nocturnal activity and foraging of prairie raccoons (Procyon lotor) in North Dakota
Raymond J. Greenwood
1982, American Midland Naturalist (107) 238-243
Nocturnal activity and foraging of 39 radio-equipped raccoons (Procyon lotor) in eastern North Dakota were studied from April-July in 1974-1976. Sixteen of the raccoons were collected after foraging bouts for stomach content analysis. Raccoon activity consisted of running (13%), walking (49%) and local movement in confined areas (38%). Local movement...
A note on the Goodman Jack
H.S. Swolfs, J.D. Kibler
1982, Rock Mechanics Felsmechanik Mecanique des Roches (15) 57-66
A Note on the Goodman Jack. Reconnaissance experiments, performed to evaluate the practical utility of the hard-rock variety of the Goodman Jack 1, reveal that the Hustrulid-T* correction adequately reconciles the discrepancy between the measured and true deformation modulus of the rock mass in the range of 30 to50 gigapascals....
Toxicity of rotenone to selected aquatic invertebrates and frog larvae
J. H. Chandler, L. L. Marking
1982, Progressive Fish-Culturist (44) 78-80
No abstract available....
Map showing cumulative thickness of sandstone in the Fox Hills-Lower Hell Creek aquifer, Montana
Richard D. Feltis
1982, Water-Resources Investigations Report 82-4043
No abstract available....
Current-induced sediment movement in the deep Florida Straits: Observations
Mark Wimbush, Laszlo Nemeth, Barton Birdsall
Kent A. Fanning, Frank T. Manheim, editor(s)
1982, Book chapter, The dynamic environment of the ocean floor
No abstract available...
The impact of entrainment and impingement on fish populations in the Hudson River estuary : Volume III : An analysis of the validity of the utilities' stock recruitment curve-fitting exercise and "prior estimation of beta" technique
S.W. Christensen, C.P. Goodyear, B.L. Kirk
1982, Report
No abstract available at this time...
Detection of diethylnitrosamine in nitrate-rich water following treatment with Rhodamine flow tracers
S. L. Abidi
1982, Water Research (16) 199-204
Extremely carcinogenic diethylnitrosamine (DENA) was found to form in up to 75% yield from the reaction of nitrite with the two commonly used water tracing dyes. Rhodamine B and Rhodamine WT, DENA was detected at trace levels (0.13–7.02 μg −1) in river water samples after treatment with the dye and nitrite....
Alewives and rainbow smelt in Lake Huron: midwater and bottom aggregations and estimates of standing stocks
Ray L. Argyle
1982, Transactions of the American Fisheries Society (111) 267-285
The continued availability of adequate amounts of forage fish, primarily alewives Alosa pseudoharengus and rainbow smelt Osmerus mordax, is critical to the success of ongoing programs aimed at rebuilding lake trout Salvelinus namaycush populations and maintaining other salmonid stocks in Lake Huron. These forage species are distributed at middepths as...
The availability of conventional forms of remotely sensed data
James A. Sturdevant, Thomas M. Holm
1982, Journal of Applied Photographic Engineering (8) 153-158
For decades Federal and State agencies have been collecting aerial photographs of various film types and scales over parts of the United States. More recently, worldwide Earth resources data acquired by orbiting satellites have inundated the remote sensing community. Determining the types of remotely sensed data that are publicly available...
Evaluating the crop coefficient using spectral reflectance
J. L. Heilman, W. E. Heilman, Donald G. Moore
1982, Agronomy Journal (74) 967-971
A field study was conducted in four differentially irrigated plots of alfalfa (Medicago sativa L.) planted in Shiprock sandy loam (coarseloamy, mixed, mesic Typic Haplargid) to assess spectral reflectance for estimating the crop coefficient (Kc), defined here as the ratio of actual to potential evapotranspiration (ET). A bidirectional reflectance factor was...
Changes in vegetation and grazing capacity following honey mesquite control
Kirk C. McDaniel, John H. Brock, Robert H. Haas
1982, Journal of Range Management (35) 551-557
Honey mesquite kill and suppression, vegetation response, and changes in grazing use and capacity were evaluated following brush control in north-central Texas. Tree grubbing was most effective for eliminating honey mesquite, but because of soil and plant damage the treatment did not increase grazing capacity or improve range condition compared...
An assessment of Landsat data acquisition history on identification and area estimation of corn and soybeans
M. M. Hixson, M. E. Bauer, Donna K. Scholz
1982, Remote Sensing of Environment (12) 123-128
In the past decade, numerous studies have demonstrated the potential of satellite remote sensing for providing accurate timely crop area information. This study assessed the impact of Landsat data acquisition history on classification and area estimation accuracy of corn and soybeans in the U.S. Corn Belt. The results illustrate the...
Deserts of China
Alta S. Walker
1982, American Scientist (70) 366-376
Improving arid land quality requires an understanding of the original state of the land and its relationship to wind, water, and plant regimes, as well as understanding of interactions within the present ecosystem. Chinese scientists and local residents have made significant advances in improving arid environments in gobi and sandy...
Refining Landsat classification results using digital terrain data
Wayne A. Miller, Mark Shasby
1982, Journal of Applied Photographic Engineering (8) 35-40
Scientists at the U.S. Geological Survey's Earth Resources Observation systems (EROS) Data Center have recently completed two land-cover mapping projects in which digital terrain data were used to refine Landsat classification results. Digital ter rain data were incorporated into the Landsat classification process using two different procedures that required developing...
