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Page 4131, results 103251 - 103275

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Modelling within the stream-catchment continuum
Kenneth E. Bencala, John H. Duff, Judson W. Harvey, A. P. Jackman, F.J. Triska
A.J. Jakeman, M. Beck, Ryan J. McAleer, editor(s)
1993, Book chapter, Modeling change in environmental systems
No abstract available....
Chapter 6: Chronology of displacement on the San Andreas fault in central California: Evidence from reversed positions of exotic rock bodies near Parkfield, California
John D. Sims
Robert E. Powell, R.J. Weldon II, Jonathan C. Matti, editor(s)
1993, Book chapter, The San Andreas Fault system: Displacement, palinspastic reconstruction, and geologic evolution
This chapter presents a synthesis of data pertaining to post-early Miocene slip on the San Andreas fault in central California and suggests a three-phase evolition of the San Andreas system. The cricial evidence that supports the three phases of evolution conies from the reversed positions of two exotic rock fragments...
Life history traits and habitat needs of the redhead
Christine M. Custer
1993, Fish and Wildlife Leaflet 13
Redheads are one of five common diving duck species in North America. They are in the same taxonomic group as the pochards or bay ducks and are most similar in appearance and behavior to the canvasback. Smaller body size, late breeding, wintering in southern areas, and tolerance to salt in...
Increasing waterfowl nesting success on islands and peninsulas
J. T. Lokemoen
1993, Fish and Wildlife Leaflet 13.2.11
Waterfowl that nest in uplands in the prairie pothole region have had low recruitment rates in recent decades, primarily because of predation. The loss of breeding waterfowl and their progeny has generated interest in management techniques that safeguard incubating hens and their eggs. Developing islands and peninsulas for nesting waterfowl...
Food of salmonine predators in Lake Superior, 1981-87
David J. Conner, Charles R. Bronte, James H. Selgeby, Hollie L. Collins
1993, Technical Report 59
Diets of ten species of Lake Superior salmonines are described. Rainbow smelt (Osmerus mordax) were the primary prey during all seasons and years for inshore lake trout (Salvelinus namaycush), Pacific salmon (Oncorhynchus spp.), Atlantic salmon (Salmo salar), brown trout (S. trutta), brook trout (Salvelinus fontinalis), and splake (lake trout...
Atrazine degradation in a small stream in Iowa
D.W. Kolpin, S. J. Kalkhoff
1993, Environmental Science & Technology (27) 134-139
A study was conducted during 1990 through an 11.2-km reach of Roberts Creek in northeastern Iowa to determine the fate of atrazine in a surface water environment Water samples were collected at ~1-month intervals from April through November during stable low to medium flow conditions and analyzed for atrazine and...
Scour at a bridge over the Weldon River, Iowa
Edward E. Fischer
Shen Hsieh WenSu S.T.Wen Feng, editor(s)
1993, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
Contraction scour at the State Highway 2 bridge over the Weldon River in south-central Iowa was caused by a flood of record proportions on September 14 and 15, 1992. The peak discharge was 1, 930 cubic meters per second,which was 4 times the probable 100-year flood used to design the...
Isolation and chemical characterization of dissolved and colloidal organic matter
G. Aiken, J. Leenheer
1993, Chemistry and Ecology (8) 135-151
Commonly used techniques for the concentration and isolation of organic matter from water, such as preparative chromatography, ultrafiltration and reverse osmosis, and the methods used to analyze the organic matter obtained by these methods are reviewed. The development of methods to obtain organic matter that is associated with fractions of...
Monte Carlo simulations of multiphase flow incorporating spatial variability of hydraulic properties
Hedeff I. Essaid, Kathryn M. Hess
1993, Groundwater (31) 123-134
To study the effect of spatial variability of sediment hydraulic properties on multiphase flow, oil infiltration into a hypothetical glacial outwash aquifer, followed by oil extraction, was simulated using a cross-sectional multiphase flow model. The analysis was simplified by neglecting capillary hysteresis. The first simulation used a uniform mean permeability...
Sensitivity of juvenile striped bass to chemicals used in aquaculture
Terry D. Bills, Leif L. Marking, George E. Howe
1993, Resource Publication 192
Efforts to restore anadromous striped bass (Morone saxatilis) populations by the U.S. Fish and Wildlife Service and other agencies over the past 20 years have concentrated on hatchery culture to supplement dwindling natural reproduction. Adult fish captured for artificial spawning are stressed by handling and crowding in...
Non-shear focal mechanisms of earthquakes at The Geysers, California and Hengill, Iceland, geothermal areas
B.R. Julian, A.D. Miller, G.R. Foulger
Anon, editor(s)
1993, Conference Paper, Transactions - Geothermal Resources Council
Several thousand earthquakes were recorded in each area. We report an initial investigation of the focal mechanisms based on P-wave polarities. Distortion by complicated three-dimensional crustal structure was minimized using tomographically derived three-dimensional crustal models. Events with explosive and implosive source mechanisms, suggesting cavity opening and collapse, have been tentatively...
Rheometry of natural sediment slurries
Jon J. Major
Shen Hsieh WenSu S.T.Wen Feng, editor(s)
1993, Conference Paper, Proceedings - National Conference on Hydraulic Engineering
Recent experimental analyses of natural sediment slurries yield diverse results yet exhibit broad commonality of rheological responses under a range of conditions and shear rates. Results show that the relation between shear stress and shear rate is primarily nonlinear, that the relation can display marked hysteresis, that minimum shear stress...