Adam G. Fox
1984, Conference Paper
No abstract available ...
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Publication Extents
Not all publications have extents, not all extents are completely accurateT. V. Hromadka II
1984, Advances in Water Resources (7) 141-143
A simple numerical model for estimating a phreatic surface in an earthen dam is presented. The numerical approach is based upon the Complex Variable Boundary Element Method (CVBEM). By expanding the CVBEM approximation geometric functions into a first order Taylor series, the unknown phreatic surface location geometrics can be approximated...
G. P. Williams
1984, Geografiska Annaler, Series A (66 A) 89-102
Empirical relations are developed between river-meander features and water-discharge characteristics for 19 reaches along Swedish rivers. In these relations, either average channel width or average radius of curvature of meander arcs can be used to estimate average annual peak discharge and average daily discharge. By accepting certain assumptions,...
A.R. Chivas, J. R. O’Neil, G. Katchan
1984, Earth and Planetary Science Letters (68) 326-334
Hydrogen and oxygen isotope analyses of sericites and kaolinites from four young porphyry copper deposits (Ok Tedi (1.2 Ma) and Yandera (6.5 Ma), Papua New Guinea; Koloula (1.5 Ma), Solomon Islands; and Waisoi (<5 Ma), Fiji) indicate that the fluids from which these minerals precipitated were of mixed magmatic and...
Sharon M. Johnson, Thomas R. Steinheimer
1984, Conference Paper, National Meeting - American Chemical Society, Division of Environmental Chemistry
Rhodamine WT is used by surface water hydrologists for time of travel and dispersion studies in which flow characteristics of surface streams are determined. Surface water contamination by nitrosamines formed from Rhodamine WT and nitrite ion has been studied. A method for residue analysis of N-nitrosodiethylamine (NDEA) has been developed...
R.F. Commeau, A. Clark, Chad Johnson, F.T. Manheim, P. J. Aruscavage, C.M. Lane
1984, Conference Paper, Oceans '84 : Conference record : Industry, government, education - Designs for the future
Ferromanganese crusts on raised areas of the ocean floor have joined abyssal manganese nodules and hydrothermal sulfides as potential marine resources. Significant volumes of cobalt-rich (about 1% Co) crusts have been identified to date within the US Exclusive Economic Zone (EEZ) in the Central Pacific: in the NW Hawaiian Ridge...
S.W. Hager, D.D. Harmon, A.E. Alpine
1984, Estuarine, Coastal and Shelf Science (19) 193-204
Particulate nitrogen (PN) and chlorophyll a (Chla) were measured in the northern reach of San Francisco Bay throughout 1980. The PN values were calculated as the differences between unfiltered and filtered (0·4 μm) samples analyzed using the UV-catalyzed peroxide digestion method. The Chla values were measured spectrophotometrically, with corrections made for phaeopigments. The...
D. Hugh Barwick
1984, North American Journal of Fisheries Management (4) 308-313
Estimates of fish standing crop from coves in Keowee Reservoir, South Carolina, were obtained in May and August for 3 consecutive years. Estimates were significantly higher in May than in August for most of the major species of fish collected, suggesting that considerable numbers of fish had migrated from the...
L.C. Friedman, M. J. Fishman, D.K. Boyle
1984, Journal of Testing and Evaluation (12) 114-118
The U.S. Geological Survey has been preparing and maintaining a library of standard reference water samples for inorganic constituents for 19 years. Recently, a pilot study was conducted to see if the reference-sample program could be expanded to include pesticides and other organic materials. Two samples containing organochlorine and organophosphorus...
C. Scott Southworth
Beck Barry F., editor(s)
1984, Conference Paper
Landsat and Seasat satellite images and aerial photographs of eastern Yucatan Peninsula, Mexico, were analyzed to delineate geologic controls of ground water. Significant interpretation results include the delineation of linear topographic swales, interpreted as fractures, extending more than 50 km along strike from the previously known limit of the Holbox...
David Clague, James Bischoff, David Howell
1984, Conference Paper, Oceans Conference Record (IEEE)
The Pacific Exclusive Economic Zone contains a variety of hard mineral resources. Sand and gravel and their associated placer deposits of heavy minerals are the most likely to be developed in the near future, but offshore and deep water deposits of phosphorite, abyssal manganese nodules, ferromanganese crusts enriched in cobalt,...
Allen F. Moench
1984, Water Resources Research (20) 831-846
Theories of flow to a well in a double-porosity groundwater reservoir are modified to incorporate effects of a thin layer of low-permeability material or fracture skin that may be present at fracture-block interfaces as a result of mineral deposition or alteration. The commonly used theory for flow in double- porosity...
J.J. Hickey
1984, Ground Water (22) 544-547
The acceptability of the hypothesis of Darcian flow through a semiconfined carbonate aquifer was tested prior to running a multiple-day aquifer test in Pinellas County, Florida. The approach used to test the hypothesis was to run a number of hour-long aquifer tests at different discharges with drawdown measured at the...
T.L. Holzer, R.L. Bluntzer
1984, Groundwater (22) 450-459
Subsidence profiles across 29 oil and gas fields in the 12,200-km2 Houston, Texas, regional subsidence area, which is caused by decline of ground-water level, suggest that the contribution of petroleum withdrawal to local land subsidence is small. Despite large volumes of petroleum production, subsidence at most...
John Friday, S. J. Miller
1984, Open-File Report 84-454
Statistical summaries of streamflow data at 335 streamgaging sites are presented in this two volume report to aid in appraising the hydrology of river basins in Oregon. Records for 31 gaging stations were compiled into separate periods owing to changes in regulation during the period of data collection. The periods...
J.V. Huner, H.K. Dupree
Dupree H. K., Huner J. V., editor(s)
1984, Book chapter, Third Report to the Fish Farmers: The Status of Warmwater Fish Farming Research
No abstract available at this time...
Kenneth E. Bencala
1984, Water Resources Research (20) 1804-1814
Solute transport in streams is determined by the interaction of physical and chemical processes. Data from an injection experiment for chloride and several cations indicate significant influence of solutestreambed processes on transport in a mountain stream. These data are interpreted in terms of transient storage processes for all tracers and...
R. J. Gilliom, R.M. Hirsch, E.J. Gilroy
1984, Environmental Science & Technology (18) 530-535
Monte Carlo experiments were used to evaluate whether trace-level water-quality data that are routinely censored (not reported) contain valuable information for trend detection. Measurements are commonly censored if they fall below a level associated with some minimum acceptable level of reliability (detection limit). Trace-level organic data were simulated with best-...
L.J. Poppe, J.A. Commeau, F.T. Manheim, P. J. Aruscavage
1984, Journal of Marine Research (42) 463-472
Ferromanganese micronodules have been found on Georges Bank, off the U.S. northeast coast, distributed throughout the surficial sediments within an area about 125 km long and at least 12 km wide. These coarse, sand-sized concretions have precipitated from metal-rich interstitial waters and contain many of the textural and structural features...
Wayne Solley
1984, Report
John Friday, S. J. Miller
1984, Open-File Report 84-454-A
No abstract available....
E. R. Landa
1984, Hydrometallurgy (13) 203-211
A sequential, selective extraction procedure was used to assess the effects of sulfuric acid milling on the geochemical associations of molybdenum and arsenic in a uranium ore blend, and the tailings derived therefrom. The milling process removed about 21% of the molybdenum and 53% of the arsenic initially present in...
Gary L. Krapu
1984, The Auk (101) 213-214
Of about 140 extant species of waterfowl in the world, 54 occur in the western Pale- arctic. In this, his most recent book, Ogilvie introduces the reader to the waterfowl of Europe including occasional visitors and introduced species. Although written primarily for laymen, ornithologists will find the book informative but...
T.R. Steinheimer, M.G. Brooks
1984, International Journal of Environmental Analytical Chemistry (17) 97-111
A multi-residue method is described for the determination o triazine herbicides in natural water samples. The technique uses solvent extraction followed by gas chromatographic separation and detection employing nitrogen-selective devices. Seven compounds can be determined simultaneously at a nominal detection limit of 0.1 μg/L in a...
S. G. Hughes
1984, Journal of Nutrition (114) 1660-1663
Fingerling rainbow trout were fed semipurified diets containing graded levels of supplemental riboflavin (3, 35, 42, 49, 56, 63, 70, 100 and 600 mg/kg of diet) to determine if dietary riboflavin in excess of requirements decreases growth. In three trials with three sizes of fish (mean initial weights, 0.5, 3.2...