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Page 4686, results 117126 - 117150

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Not all publications have extents, not all extents are completely accurate
Sorption characteristics of organic compounds on hexadecyltrimethylammonium-smectite
Stephen A. Boyd, Max M. Mortland, Cary T. Chiou
1988, Soil Science Society of America Journal (52) 652-657
When hexadedyltrimethylammonium (HDTMA) ion is exchanged for metal cations like calcium in smectite, the sorptive properties of the clay are greatly modified. The resultant HDTMA-smectite complex behaves as a dual sorbent, in the sorption of organic compounds, in which the mineral fraction functions as a solid adsorbent and the organic...
Fishery research in the Great Lakes using a low-cost remotely operated vehicle
Gregory W. Kennedy, Charles L. Brown, Ray L. Argyle
1988, Conference Paper, Inshore '88 Conference Proceedings
We used a MiniROVER MK II remotely operated vehicle (ROV) to collect ground-truth information on fish and their habitat in the Great Lakes that have traditionally been collected by divers, or with static cameras, or submersibles. The ROV, powered by 4 thrusters and controlled by the pilot at the surface,...
Using side scan sonar data in a geographic information system to locate and display lake trout spawning habitat in the Great Lakes
Charles L. Brown, Thomas A. Edsall, Robert G. Waltermire, Barbara White
1988, Conference Paper, Proceedings of the Fifth National MOSS User's Workshop
The National Fisheries Research Center-Great Lakes of the U.S. Fish and Wildlife Service has extensively used a side scan sonar to survey and pinpoint lake trout spawning grounds in the Great Lakes. The Geographic Information System (GIS) of the National Ecology Research Center produced maps from the side scan sonar...
Mineral resources of the Turtle Mountains Wilderness Study Area, San Bernardino County, California
Keith A. Howard, Jane E. Nielson, Robert W. Simpson, Richard W. Hazlett, Henry V. Alminas, John K. Nakata, John R. McDonnell Jr.
1988, Bulletin 1713-B
At the request of the U.S. Bureau of Land Management, approximately 105,200 acres of the Turtle Mountains Wilderness Study Area (CDCA-307) were evaluated for mineral resources (known) and resource potential (undiscovered). In this report, the area studied is referred to as "the wilderness study area" or simply "the study area";...
Simulation of three lahars in the Mount St Helens area, Washington using a one-dimensional, unsteady-state streamflow model
Antonius Laenen, R. P. Hansen
1988, Water-Resources Investigations Report 88-4004
A one-dimensional, unsteady-state, open-channel model was used to analytically reproduce three lahar events. Factors contributing to the success of the modeling were: (1) the lahars were confined to a channel, (2) channel roughness was defined by field information, and (3) the volume of the flow remained relatively unchanged for the...
Hydrologic reconnaissance of the Chilkat River basin, Southeast Alaska; with special reference to the Alaska Chilkat Bald Eagle Preserve
E. F. Bugliosi
1988, Water-Resources Investigations Report 88-4023
The Chilkat River Basin of Alaska is characterized by glaciers, highly dissected mountains with steep-gradient streams, and braided rivers in broad, alluvium-filled valleys. Orographic effects and a wide seasonal range in temperature cause variations in the amount and distribution of precipitation, and thus in the resulting runoff and streamflow. Seeps...
Estimates of gains and losses for reservoirs on the Snake River from Blackfoot to Milner, Idaho, for selected periods, 1912 to 1983
L.C. Kjelstrom
1988, Water-Resources Investigations Report 87-4063
Croplands in the semiarid central part of the Snake River Plain are dependent on the availability of irrigation water, most of which comes from the Snake River. Allocation of irrigation water from the river requires that gains and losses be determined for American Falls Reservoir, Lake Walcott, and Milner Lake....
Natural variance in pH as a complication in detecting acidification of lakes
J.T. Turk
1988, Water, Air, & Soil Pollution (37) 171-176
Natural variance in the pH of three dilute lakes in the Flat Tops Wilderness Area, Colorado, complicates the detection of acidification. Variations in pH during July-September of 1983 were: 0.95 (Ned Wilson Lake), 1.36 (Upper Island Lake), and 1.53 (Oyster Lake). Mean diurnal variations in pH during 1983 were: 0.37...
Interrelations among pyroclastic surge, pyroclastic flow, and lahars in Smith Creek valley during first minutes of 18 May 1980 eruption of Mount St. Helens, USA
S.R. Brantley, R. B. Waitt
1988, Bulletin of Volcanology (50) 304-326
A devastating pyroclastic surge and resultant lahars at Mount St. Helens on 18 May 1980 produced several catastrophic flowages into tributaries on the northeast volcano flank. The tributaries channeled the flows to Smith Creek valley, which lies within the area devastated by the surge but was unaffected by the great...
Effects of the antimicrobic tiamulin on seven gram-negative bacterial fish pathogens
G. L. Bullock, R. L. Herman
1988, Journal of Wildlife Diseases (24) 22-24
In vitro and in vivo tests were carried out with tiamulin and gram-negative bacterial pathogens of fish. Determination of minimum inhibitory concentration for 51 strains of seven species of gram-negative bacterial pathogens showed that only strains of Vibrio anguillarum were sensitive at 1.6–6.25 ppm, while...
Further comments on sensitivities, parameter estimation, and sampling design in one-dimensional analysis of solute transport in porous media
Debra S. Knopman, Clifford I. Voss
1988, Water Resources Research (24) 225-238
Sensitivities of solute concentration to parameters associated with first-order chemical decay, boundary conditions, initial conditions, and multilayer transport are examined in one-dimensional analytical models of transient solute transport in porous media. A sensitivity is a change in solute concentration resulting from a change in a model parameter. Sensitivity analysis is...
Motor-operated valve for fish culturists
J. T. Fuss
1988, Progressive Fish-Culturist (50) 121-124
Many fish culture systems require motoroperated valves to regulate water flow. The expense of commercial units can be prohibitive but, by using inexpensive components and a little assembly time, a manual valve can be motorized for a fraction of the cost....
Geochemistry and origin of albite gneisses, northeastern Adirondack Mountains, New York
P.R. Whitney, J.F. Olmsted
1988, Contributions to Mineralogy and Petrology (99) 476-484
Albite gneisses containing up to 8.7 percent Na2O and as little as 0.1% K2O comprise a significant part of the Proterozoic Lyon Mountain Gneiss in the Ausable Forks Quadrangle of the northeastern Adirondacks, New York State. Two distinct types of albite gneisses are present. One is a trondhjemitic leucogneiss (LAG)...