Interannual variability in biochemistry of partially mixed estuaries: Dissolved silicate cycles in northern San Francisco Bay
David H. Peterson, Daniel R. Cayan, John F. Festa
Douglas A. Wolfe, editor(s)
1986, Book chapter, Estuarine variability
Much of the interannual variability in partially mixed estuaries in dissolved inorganic nutrient and dissolved oxygen patterns results from an enhancement or reduction of their annual cycle (generally via climatic forcing). In northern San Francisco Bay estuary the annual cycle of dissolved silicate supply peaks in spring and the effect...
Introduction: development, testing, and application of wildlife-habitat models
K.H. Berry
J. Verner, M.L. Morrison, C.J. Ralph, editor(s)
1986, Book chapter, Wildlife 2000: Modeling Habitat Relationships of Terrestrial Vertebrates.
No abstract available at this time...
Cluster molecular orbital description of the electronic structures of mixed-valence iron oxides and silicates
David M. Sherman
1986, Solid State Communications (58) 719-723
A molecular orbital description, based on spin-unrestricted Xα-scattered wave calculations, is given for the electronic structures of mixed valence iron oxides and silicates. The cluster calculations show that electron hopping and optical intervalence charge-transger result from weak FeFe bonding across shared edges of FeO6 coordination polyhedra. In agreement with Zener's double exchange...
Ground Water
Water Resources Division, U.S. Geological Survey
1986, Report
Some water underlies the Earth's surface almost everywhere, beneath hills, mountains,plains, and deserts. It's not always accessible, or fresh enough for use without treatment, and it's sometimes difficult to locate or to measure and descri be. This water may occur close to the land surface, as in a marsh, or...
A model for selecting harvest fraction for aggregate populations of hatchery and wild anadromous salmonids
J.D. McIntyre, R.R. Reisenbichler
Richard M. Stroud, editor(s)
1986, Conference Paper, Proceedings of a symposium on the role of fish culture in fisheries management
No abstract available ...
Evaluation of a mallard productivity model
Douglas H. Johnson, L.M. Cowardin, D. W. Sparling
J. Verner, L.M. Morrison, C.J. Ralph, editor(s)
1986, Book chapter, Wildlife 2000: modeling habitat relationships of terrestrial vertebrates
A stochastic model of mallard (Anas platyrhynchos) productivity has been developed over a 10-year period and successfully applied to several management questions. Here we review the model and describe some recent uses and improvements that increase its realism and applicability, including naturally occurring changes in wetland habitat, catastrophic weather events,...
A new view for resource managers
Robert H. Haas
1986, Rangelands (8) 99-102
In decades past, the rancher depended upon reports from cowboys to gather information he needed to make management decisions. Today, the vast open ranges of the cowboy era are mostly gone in the United States-fenced into pastures, paddocks, or fields that are now discrete management units. But fencing in the...
A natural epizootic of infectious haematopoietic necrosis in imported Atlantic salmon, Salmo salar L., reared in the enzootic region
D. Mulcahy, J. Wood
1986, Journal of Fish Diseases (9) 173-175
In June 1984, fry of Atlantic salmon, Salmo salar L., (0-3 g mean weight), being reared in a hatehery operated by the University of Washington, began to die and infectious haematopoietic necrosis (IHN) was diagnosed. A total of 40 000 fry were being held in 11 tanks. Mortality due to...
Processing techniques for the production of an experimental computer-generated shaded-relief map
Damon D. Judd
1986, American Cartographer (13) 72-79
An experimental computer-generated shaded-relief map of a topographic quadrangle of Nome, Alaska, at 1:1,000,000 scale was created to demonstrate current capabilities of map production. This paper describes the techniques used to produce the map product. The data consisted of forty-eight 1° by 1° blocks of resampled digital elevation model (DEM) data....
ESTIMATION OF URBAN STORM-RUNOFF LOADS.
Nancy E. Driver, David J. Lystrom
Urbonas BenRoesner Larry A., editor(s)
1986, Conference Paper
The United States was divided into three regions, on the basis of mean annual rainfall, to decrease the variability in storm-runoff constituent loads and to improve regression relations with basin and climatic characteristics. Multiple-regression analyses, in progress, are being refined to determine the best regression models for each of the...
Application of the Flory-Huggins theory to the solubility of solids in glyceryl trioleate
Cary T. Chiou, Milton Manes
1986, Journal of the Chemical Society, Faraday Transactions I (82) 243-246
The conventional thermodynamic deviation for ideal solid–liquid solubilities is modified by substituting the Flory–Huggins model for Raoult's law. A comparison of published data for eleven solides in glyceryl trioleate with the predictions of the conventional and modified equations shows that the significantly higher athermal solubilities from the modified...
Transport of chloride ion in a water-unsaturated soil exhibiting anion exclusion
Ronald V. James, Jacob Rubin
1986, Soil Science Society of America Journal (50) 1142-1149
Miscible displacement techniques were used to create Cl- concentration profiles in unsaturated laboratory columns of Delhi sand (Typic Xeropsamments), each having a nearly uniform water content. The three steady flow rates used resulted in three different, average water contents. Chloride concentrations near the top of the column were smaller and...
Preliminary estimates of loss of juvenile anadromous salmonids to predators in John Day Reservoir and development of a predation model
B.E. Reiman, R.C. Beamesderfer, A.A. Nigro, S.C. Vigg, H.C. Hansel, D.E. Palmer
1986, Report
No abstract available ...
Measurement of nitrous oxide reductase activity in aquatic sediments
L.G. Miller, Ronald S. Oremland, S. Paulsen
1986, Applied and Environmental Microbiology (51) 18-24
Denitrification in aquatic sediments was measured by an N2O reductase assay. Sediments consumed small added quantities of N2O over short periods (a few hours). In experiments with sediment slurries, N2O reductase activity was inhibited by O2, C2H2, heat treatment, and by high levels of nitrate (1 mM) or sulfide (10...
Predictive models in hazard assessment of Great Lakes contaminants for fish
Dora R. May Passino
1986, Conference Paper, Proceedings of the technology transfer conference, part b: water quality research
A hazard assessment scheme was developed and applied to predict potential harm to aquatic biota of nearly 500 organic compounds detected by gas chromatography/mass spectrometry (GC/MS) in Great Lakes fish. The frequency of occurrence and estimated concentrations of compounds found in lake trout (Salvelinus namaycush) and walleyes (Stizostedion vitreum vitreum)...
Modeling of estuarine hydrodynamics - a mixture of art and science
R. T. Cheng
1986, Conference Paper, Proceedings, 3rd International Symposium on River Sedimentation
No abstract available ...
Research in earthquake prediction - the Parkfield prediction experiment
Henry Spall
1986, Earthquakes & Volcanoes (USGS) (18) 148-148
The 15-mile-long Parkfield, California, section of the Sam Andreas fault is the best understood earthquake source region in the world. Moderate-sized earthquakes of local magnitude 5 3/4 occurred at Parkfield in 1881, 1901, 1922, 1934, and 1966....
Prototype operational earthquake prediction system
Henry Spall, editor(s)
1986, Earthquakes & Volcanoes (USGS) (18) 151-152
An objective if the U.S. Earthquake Hazards Reduction Act of 1977 is to introduce into all regions of the country that are subject to large and moderate earthquakes, systems for predicting earthquakes and assessing earthquake risk. In 1985, the USGS developed for the Secretary of the Interior a program for...
Seismic Computerized Alert Network
Henry Spall, editor(s)
1986, Earthquakes & Volcanoes (USGS) (18) 153-153
In 1985 the USGS devised a model for a Seismic Computerized Alert Network (SCAN) that would use continuous monitoring of seismic data from existing types of instruments to provide automatic, highly-reliable early warnings of earthquake shaking. In a large earthquake, substantial damaging ground motions may occur at great distances from...
Effects of a Kentucky flood-control reservoir on macroinvertebrates in the tailwater
J.F. Novotny
1985, Hydrobiologia (126) 143-153
The effects of a flood-control reservoir on downstream macroinvertebrates were assessed by comparing the tailwater community with that of a natural stream. Samples were collected 1.6 and 21.1 km below Barren River Lake dam in 1979, 1980, and 1981 and in a reservoir tributary in 1980 and 1981. An indication...
Artificial infestation of largemouth bass and walleye with glochidia of Lampsilis ventricosa (Pelecypoda: Unionidae)
D. L. Waller, L. E. Holland Bartels, L. G. Mitchell, T. W. Kammer
1985, Freshwater Invertebrate Biology (4) 152-153
The unionid mussel Lampsilis ventricosa is a bundant in the upper Mississippi River and provides a model for studies related to recovery of the endangered Higgins' eye mussel (Lampsilis higginsi). We tested the suitability of two species of fish species as hosts for glochidia of L. ventricosa. Laboratory-reared largemouth bass...
Retention behavior of long chain quaternary ammonium homologues and related nitroso-alkymethylamines
S. L. Abidi
1985, Journal of Chromatography (324) 209-230
Several chromatographic methods have been utilized to study the retentionbehavior of a homologous series of n-alkylbenzyldimethylammonium chlorides (ABDAC) and the corresponding nitroso-n-alkylmethylamines (NAMA). Linear correlation of the logarithmic capacity factor (k') with the number of carbons in the alkyl chain provides useful information on both gas chromatographic (GC) and high-performance...
Optimal management strategies in variable environments: Stochastic optimal control methods
B. Kenneth Williams
1985, Journal of Environmental Management (21) 95-115
Dynamic optimization was used to investigate the optimal defoliation of salt desert shrubs in north-western Utah. Management was formulated in the context of optimal stochastic control theory, with objective functions composed of discounted or time-averaged biomass yields. Climatic variability and community patterns of salt desert...
The need for accuracy in modelling: An example
Douglas H. Johnson, M.J. Conroy, J.D. Nichols
1985, Ecological Modelling (30) 157-161
The need for accurate information in modelling depends on the objectives of the effort. but trustworthy data are essential for a model intended for use in the management of natural resources. This point is illustrated by referring to a recently published model of canvasback ducks. We demonstrate that several key...
Goodness-of-fit tests for open capture-recapture models
K. H. Pollock, J.E. Hines, J.D. Nichols
1985, Biometrics (41) 399-410
General goodness-of-fit tests for the Jolly-Seber model are proposed. These tests are based on conditional arguments using minimal sufficient statistics. The tests are shown to be of simple hypergeometric form so that a series of independent contingency table chi-square tests can be performed. The relationship of these...
