Shuttle imaging radar: Physical controls on signal penetration and subsurface scattenng in the Eastern Sahara
Gerald G. Schaber, John F. McCauley, Carol S. Breed, Gary R. Olhoeft
1986, IEEE Transactions on Geoscience and Remote Sensing (GE-24) 603-623
SIR-A signal penetration and subsurface backscatter within the upper meter or so of the sediment blanket in the Eastern Sahara of southern Egypt and northern Sudan are enhanced both by radar sensor parameters and by the physical and chemical characteristics of eolian and alluvial materials. Interpretation of SIR-A images by...
RELATION BETWEEN SURFACE-WATER QUALITY AND THE COMPOSITION OF COAL IN PIKE COUNTY, KENTUCKY.
Jay Kiesler
1986, Conference Paper, University of Kentucky, Office of Engineering Services, (Bulletin) UKY BU
The quality of surface water in Pike County, Kentucky, seems to reflect the composition of coals in the county. Groundwater acquires mineral concentration characteristics of the rocks through which it moves. When groundwater is discharged to streams the mineral concentrations in streams, especially during low flow periods, are characteristic of...
A Brief History of the U.S. Geological Survey
Mary C. Rabbitt
1986, Book
Phytoplankton spatial distribution in south San Francisco Bay: mesoscale and small-scale variability
Thomas M. Powell, James E. Cloern, Roy A. Walters
Douglas A. Wolfe, editor(s)
1986, Book chapter, Estuarine variability
Horizontal transects of surface salinity and in-vivo fluorescence indicate the existence of three distinct spatial regimes in South San Francisco Bay. A mid-Bay region of low phytoplankton biomass with little small-scale variance is bounded to the north and south by water masses having higher in-vivo fluorescence and enhanced small-scale variability....
Tectonic and magmatic development of the Great Basin of western United States during the late Cenozoic time.
E.H. McKee, D. C. Noble
1986, Modern Geology (10) 39-49
In the later Cainozoic, approx 18 m.y. ago, the first basin and range faulting developed in the central part of the Great Basin, this extensional tectonic system resulting from drag on the North American plate as the Pacific plate moved obliquely to the NW along the San Andreas fault. The...
Snow chemistry of the Cascade-Sierra Nevada Mountains
L.B. Laird, Howard E. Taylor, V. C. Kennedy
1986, Environmental Science & Technology (20) 275-290
This investigation assesses geographic variations in atmospheric deposition in Washington, Oregon, and California using snow cores from the Cascade-Sierra Nevada Mountains, collected from late February to mid-March 1983. A statistical analysis of the analytical and sampling precision was made. The snowpack in the higher Cascades and Sierra Nevada is not...
Potentiometric surface of the Floridan aquifer system in the Suwannee River Water Management District, Florida, May 1985
Jack C. Rosenau, Paul E. Meadows
1986, Water-Resources Investigations Report 86-4184
The potentiometric surface map of the Floridan aquifer system in the Suwannee River Water Management District depicts the level to which water rose in tightly cased wells that tap the Floridan aquifer system in May 1985. The Floridan aquifer is the principal source of freshwater for north Florida. The surface...
Simulation of fluid flow and energy transport processes associated with high-level radioactive waste disposal in unsaturated alluvium
David W. Pollock
1986, Water Resources Research (22) 765-775
Many parts of the Great Basin have thick zones of unsaturated alluvium which might be suitable for disposing of high-level radioactive wastes. A mathematical model accounting for the coupled transport of energy, water (vapor and liquid), and dry air was used to analyze one-dimensional, vertical transport above and below an...
Hydrogeologic framework of the Floridan aquifer system in Florida and in parts of Georgia, Alabama, and South Carolina
James A. Miller
1986, Professional Paper 1403-B
The Floridan aquifer system of the Southeastern United States is comprised of a thick sequence of carbonate rocks that are mostly of Paleocene to early Miocene age and that are hydraulically connected in varying degrees. The aquifer system consists of a single vertically continuous permeable unit updip and of two...
Louisiana hydrologic atlas map no. 1: Mean annual runoff in Louisiana
Harry C. McWreath III, Alfred S. Lowe
1986, Water-Resources Investigations Report 86-4149
The map shows the mean annual runoff from drainage basins in Louisiana exclusive of those in the coastal zone and the alluvial valleys of the Mississippi, Ouachita, and Red Rivers. The mean annual runoff for the State of Louisiana varies from 0.7 (cu ft/s)/sq mi in the Sabine and Red...
Guidelines to classification and nomenclature of Arabian felsic plutonic rocks
C.R. Ramsay, D. B. Stoeser, A.R. Drysdall
1986, Journal of African Earth Sciences (4) 13-20
Well-defined procedures for classifying the felsic plutonic rocks of the Arabian Shield on the basis of petrographic, chemical and lithostratigraphic criteria and mineral-resource potential have been adopted and developed in the Saudi Arabian Deputy Ministry for Mineral Resources over the...
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...
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...
Obstacles facing the venus radar mapper - The implications of gestalt formation in stereo-radargrammetry
R.L. Wildey
1986, Earth, Moon and Planets (35) 47-54
The question of adapting to radar images the existing hardware that form topographic maps through stereo-photogrammetric models, is examined in principle. Such hardware utilizes a human/ computer hybrid. Although the problem of brightness differentials between corresponding landmarks can be dealt with pseudo-photoclinometrically, the main problem is whether the perspective in...
Volcanic debris avalanches
S. Brantley, H. Glicken
1986, Earthquakes & Volcanoes (USGS) (5) 195-206
Tectonic significance of precambrian apatite fission-track ages from the midcontinent United States
K.D. Crowley, C. W. Naeser, C.A. Babel
1986, Earth and Planetary Science Letters (79) 329-336
Apparent apatite fission-track ages from drill core penetrating basement on the flank of the Transcontinental Arch in northwestern Iowa range from 934 ± 86 to 641 ± 90 Ma. These ages, the oldest reported in North America, record at least two...
Digital image measurement of the area and anatomical structure of tree rings
Thomas M. Yanosky, Charles J. Robinove
1986, Canadian Journal of Botany (64) 2896-2902
A microcomputer coupled to a video digitizer was used to develop methods for measuring areas of tree rings and for delineating and measuring microscopic anatomical features. Digitally imaged areas of individual rings of a loblolly pine cross section were within 2.6% of areas measured with a planimeter and were more...
Aqueous geochemistry and diagenesis in the eastern Snake River Plain aquifer system, Idaho
Warren W. Wood, Walton H. Low
1986, Bulletin (97) 1456-1466
Water budget and isotopic analyses of water in the eastern Snake River Plain aquifer system confirm that most, if not all, of the water is local meteoric in origin. Solute mass-balance arguments suggest that ∼5 × 109 moles of calcite and 2.6 × 109 moles of silica are precipitated annually...
Influence of irrigation on salinity and nitrate in a stream-aquifer system
Leonard F. Konikow, M.A. Person
1986, Conference Paper, Conjunctive water use: understanding and managing surfacewater-groundwater interactions
Changes in salinity and nitrate concentration in groundwater and surface water in the semiarid Arkansas River valley of southeastern Colorado, USA were related primarily to irrigation practices. Water is applied to fields by flood irrigation through ditches and furrows. Irrigation water is derived in nearly equal amounts from surface water...
Patterns and causes of change in a cliff swallow colony during a 17-year period
Gary L. Krapu
1986, Prairie Naturalist (18) 109-114
The number of cliff swallow (Petrochelidon pyrrhonata) nests at a farmstead in southeastern North Dakota increased at an average annual rate of 87% with house sparrow (Passer domesticus) removal during 1957-60 and 1970-72. Harassment of nesting cliff swallows by house sparrows, adult swallow mortality from cold weather in late May,...
Effect of seasonally changing tissue weight on trace metal concentrations in the bivalve Macoma balthica in San Francisco Bay
Daniel J. Cain, Samuel N. Luoma
1986, Marine Ecology Progress Series (28) 209-217
The influence of seasonal changes in the weight of soft tissues on temporal fluctuations in tissue concentrations of Cu and Zn was examined in 4 populations of the clam Macoma balthica sampled in San Francisco Bay for a period of 2 to 5 yr. Fluctuations in metal concentration expected from...
Authors' reply
R.M. Hirsch, N.E. Peters
1986, Atmospheric Environment (20) 230-232
No abstract available....
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....
Upper Pleistocene and Holocene lakes in the An Nafud, Saudi Arabia
E. Schulz, J.W. Whitney
1986, Hydrobiologia (143) 175-190
Two major lake periods were discovered in the sand sea of An Nafud and the surrounding areas. In Upper Pleistocene large lakes occurred around the dune area and in the interior of the sand sea. Their deposits were formed between 34 000 and 24 000 BP. The lakes were not...
Evidence for a stronger oxygen-minimum zone off central California during late Pleistocene to early Holocene
J.V. Gardner, E. Hemphill-Haley
1986, Geology (14) 691-694
Of 31 deep-sea cores collected along the central California continental slope, 18 have distinctly laminated sediment at depth, but none have laminations in the top few centimetres. The cores with laminated facies are restricted to water depths between 508 and 1508 m, but...
