D4Z: A new renumbering for iterative solution of ground-water flow and solute-transport equations
K.L. Kipp, T.F. Russell, J.S. Otto
1992, Conference Paper, Finite Elements in Water Resources, Proceedings of the International Conference
D4 zig-zag (D4Z) is a new renumbering scheme for producing a reduced matrix to be solved by an incomplete LU preconditioned, restarted conjugate-gradient iterative solver. By renumbering alternate diagonals in a zig-zag fashion, a very low sensitivity of convergence rate to renumbering direction is obtained. For two demonstration problems involving...
Compost: Brown gold or toxic trouble?
D.A. Kovacic, R.A. Cahill, T.J. Bicki
1992, Environmental Science & Technology (26) 38-41
Limited data are available regarding the occurrence of potentially hazardous constituents in raw, uncomposted yard wastes, partially composted yard wastes, and finished compost (15, 16). Environmental monitoring at composting operations or facilities is lacking, and currently published research on the environmental fate of composted yard waste constituents is extremely limited....
Triton's surface-atmosphere energy balance
J.A. Stansberry, R.V. Yelle, J. I. Lunine, A. S. McEwen
1992, Icarus (99) 242-260
We explore the energetics of Triton's surface-atmosphere system using a model that includes the turbulent transfer of sensible heat as well as insolation, reradiation, and latent heat transport. The model relies on a 1° by 1° resolution hemispheric bolometric albedo map...
Salmonid whirling disease
M.E. Markiw
1992, Fish and Wildlife Leaflet 17
This paper provides the latest scientific and technical advances in the management of salmonid whirling disease caused by the myxosporean Myxobolus cerebralis (Syn. Myxosoma cerebralis). The complete life cycle of the parasite and the biology of the infective agent to fish, the actinosporean Triactinomyxon stage, are reviewed, and suggested procedures...
The biogeochemical cycling of trace metals in the water column of Lake Sammamish, Washington: Response to seasonally anoxic conditions
Laurie S. Balistrieri, J.W. Murray, B. Paul
1992, Limnology and Oceanography (37) 529-548
Total acid‐soluble and dissolved Cd, Co, Cr, Cu, Ni, Pb, and Zn concentrations in the water column of a seasonally anoxic lake (Lake Sammamish, Washington) were measured on a monthly basis during the course of a year. These data, in conjunction with Fe, Mn, sulfide, and nutrient...
Influence of age and selected environmental factors on reproductive performance of canvasbacks
Jerome R. Serie, David L. Trauger, Jane E. Austin
1992, Journal of Wildlife Management (56) 546-556
Age, productivity, and other factors affecting breeding performance of canvasbacks (Aythya valisineria) are poorly understood. Consequently, we tested whether reproductive performance of female canvasbacks varied with age and selected environmental factors in southwestern Manitoba from 1974 to 1980. Neither clutch size, nest parasitism, nest success, nor the number of ducklings/brood...
Invertebrate trace fossils; the backbone of continental ichnology
S.T. Hasiotis, T. M. Bown
1992, Book chapter, Trace fossils
No abstract available...
Application of a computer simulation model to migrating white-fronted geese in the Klamath Basin
R.B. Frederick, William R. Clark, John Y. Takekawa
Dale R. McCullough, R.H. Barrett, editor(s)
1992, Book chapter, Wildlife 2001: Populations
The Pacific greater white-fronted goose (Anser albifrons) population has declined precipitously over the past 20 years. Loss of wetland habitat in California wintering areas has had a significant effect on the population, so recovery of the population may depend on innovative management of the few remaining wetlands. A computer simulation...
Immunization of channel catfish with a crude, acid-extracted preparation of motile aeromonad S-layer protein Biomedical Letters
L.A. Ford, R.L. Thune
1992, Biomedical Letters (47) 355-362
No abstract available. ...
Record of a redhead, Aythya americana, laying eggs in a northern harrier, Circus cyaneus, nest
J. P. Fleskes
1992, Canadian Field-Naturalist (106) 263-264
An active Northern Harrier, Circus cyaneus, nest containing Redhead, Aythya americana, eggs, found in an Alberta wetland, apparently represents the first record of a Redhead parasitizing a harrier....
Diurnal flight time of wintering Canada geese: consideration of refuges and flight energetics
J. E. Austin, D.D. Humburg
1992, Prairie Naturalist (24) 21-30
We monitored individual radio-equipped Canada geese (Branta canadensis) associated with a federal refuge to assess flight activities from late fall through spring. The number of flights per day was lowest in late fall when most geese remained within the refuge and highest in spring when they moved increasingly beyond the...
The geology of radon
James K. Otton
1992, Report
Sea otter population surveys: Why and How
R.J. Jameson
1992, The Otter Raft (47) 4-5
U.S. Geological Survey Library classification system
R. Scott Sasscer
1992, Bulletin 2010_1992
The U.S. Geological Survey library classification system has been designed for an earth science library. It is a tool for assigning classification numbers to earth science and allied pure science library materials in order to collect these materials into related subject groups on the library shelves and arrange them alphabetically...
Habitat use by a headwater stream fish community in North-central Pennsylvania
J. H. Johnson, D. S. Dropkin, P.G. Shaffer
1992, Rivers (3) 69-79
Molt frequency and size class distribution in the California spiny lobster (Panulirus interruptus), at San Nicolas Island, California
James L. Bodkin, L.B. Browne
1992, California Fish and Game (78) 136-144
Utility of radiocarbon-dated stratigraphy in determining late Holocene earthquake recurrence intervals, upper Cook Inlet region, Alaska
S. Bartsch-Winkler, H. R. Schmoll
1992, Geological Society of America Bulletin (104) 684-694
During the great 1964 earthquake, parts of coastal southern Alaska subsided tectonically as much as 2 m, and this led to burial of high-intertidal organic-rich marshes by low-intertidal and tidal silt. In the tectonically active part of upper Cook Inlet, the presence of stratigraphic sections containing numerous prehistoric interbedded layers...
Effect of water saturation in soil organic matter on the partition of organic compounds
D.W. Rutherford, G.T. Chlou
1992, Environmental Science & Technology (26) 965-970
No abstract available. ...
A reconnaissance study of herbicides and their metabolites in surface water of the midwestern united states using immunoassay and gas chromatography/mass spectrometry
E. Michael Thurman, D. A. Goolsby, M. T. Meyer, M. S. Mills, M.L. Pomes, Dana W. Kolpin
1992, Environmental Science & Technology (26) 2440-2447
Preemergent herbicides and their metabolites, particularly atrazine, deethylatrazine, and metolachlor, persisted from 1989 to 1990 in the majority of rivers and streams in the midwestern United States. In spring, after the application of herbicides, the concentrations of atrazine, alachlor, and simazine were frequently 3-10 times greater than the U.S. Environmental...
Metallogeny of the midcontinent rift system of North America
S. W. Nicholson, W.F. Cannon, K. J. Schulz
1992, Precambrian Research (58) 355-386
The 1.1 Ga Midcontinent rift system of North America is one of the world's major continental rifts and hosts a variety of mineral deposits. The rocks and mineral deposits of this 2000 km long rift are exposed only in the Lake Superior region. In the Lake Superior region, the...
Chloride interference in the analysis of dissolved organic carbon by the wet oxidation method
George R. Aiken
1992, Environmental Science & Technology (26) 2435-2439
The presence of Cl- in concentrations greater than 0.02 M is shown to interfere with the analysis of aqueous DOC concentrations by the wet oxidation method of analysis when a reaction time of 5 min is employed. Chloride competes with DOC for S2O82-, lowering the overall oxidation efficiency. The resulting...
Bluff recession rates along the Lake Michigan shoreline in Illinois
R.W. Jibson, J.-M. Staude
1992, Bulletin of the Association of Engineering Geologists (29) 103-117
For two time periods, 1872-1937 and 1937-1987, rates of retreat vary from 10 to 75 cm/yr between discrete segments of bluffs (defined by lithology) and between time periods for a given bluff segment. The average retreat rates for the entire area, however, do not vary significantly between the two time...
Tale of three prospects
Wendell A. Duffield
Anon, editor(s)
1992, Conference Paper, Transactions - Geothermal Resources Council
Most high-temperature, hydrothermal-convection systems probably are heated by bodies of magma (and/or hot plutons), whose presence is suggested by geologically young, if not active volcanism. Study of a young volcanic area provides information about the general thermal status of the underlying heat source, and detailed information about the time-space-volume-composition (TSVC)...
13C-NMR spectra and contact time experiment for Skjervatjern fulvic and humic acids
Ronald L. Malcolm
1992, Environment International (18) 609-620
The T(CP) and T(1p) time constants for Skjervatjern fulvic and humic acids were determined to be short with T(CP) values ranging from 0.14 ms to 0.53 ms and T(1p) values ranging from 3.3 ms to 5.9 ms. T(CP) or T(1p) time constants at a contact time of 1 ms are...
Quantitative evaluation of XAD-8 and XAD-4 resins used in tandem for removing organic solutes from water
Ronald L. Malcolm, P. MacCarthy
1992, Environment International (18) 597-607
The combined XAD-8 and XAD-4 resin procedure for the isolation of dissolved organic solutes from water was found to isolate 85% or more of the organic solutes from Lake Skjervatjern in Norway. Approximately 65% of the dissolved organic carbon (DOC) was first removed on XAD-8 resin, and then an additional...
