Water and tritium movement through the unsaturated zone at a low-level radioactive-waste disposal site near Sheffield, Illinois, 1981-85
P.C. Mills, R. W. Healy
1991, Open-File Report 89-271
The movement of water and tritium through the unsaturated zone was studied at a low-level radioactive-waste disposal site near Sheffield, Bureau County, Illinois, from 1981 to 1985. Water and tritium movement occurred in an annual, seasonally timed cycle; recharge to the saturated zone generally occurred in the spring and early...
Water-quality data for Sauk Lake and tributaries near Sauk Centre, Minnesota, 1988-89
Gregory B. Mitton
1991, Open-File Report 91-456
The U.S. Army Corps of Engineers is planning to reduce aquatic growth and siltation in Sauk Lake in west-central Minnesota in order to improve recreation. A detailed water-quality survey of the lake and surrounding watershed was needed to plan remedial activities. Water-quality data were collected at 11 sites on Sauk Lake,...
Crustal structure interpreted from magnetic anomalies
Jeffrey Phillips, Richard J. Reynolds, Herbert Frey
1991, Reviews of Geophysics (29) 416-427
In this review, we discuss publications during the last quadrennium (1987–1990) that used aeromagnetic data, marine magnetic data, satellite magnetic data, and rock magnetic and petrologic data to provide information on the sources of magnetic anomalies. Abstracts and papers by non‐U.S. authors are not described.The publications reviewed reflect increased integration...
Use of processed geophysical data to improve the delineation of infilled scour holes at bridge piers
F.P. Haeni, Gary Placzek
1991, Conference Paper, Expanded abstracts with biographies: 1991 technical program: 61st Annual International SEG Meeting
No abstract available....
USFWS selected geographic analyses
Floyd O. Stayner, James D. Scurry, James B. Johnston, Mary C. Watzin, Pasquale F. Roscigno
1991, Conference Paper, Coastal zone '91: Proceedings of the seventh symposium on coastal and ocean management
The geographic information system (GIS) used by the National Wetlands Research Center (NWRC) of the U.S. Fish and Wildlife Service has been valuable in assisting natural resource managers in planning and managing coastal fish and wildlife resources. In the past 5 years, NWRC has conducted about 60 studies employing this...
Estimating wintering Bald Eagle densities in the Mississippi Alluvial Valley
Mike Brown, James R. Nassar
1991, Journal of Raptor Research 40-42
Surveys on the winter distribution of Bald Eagles have been concentrated in the northern USA (Hastings 1988, Mattson 1988), where Bald Eagles are most common. Few density estimates for wintering Bald Eagles exist. In the past, different survey techniques with little standardization have been used. Statistical analyses and error measurements of existing winter survey...
Global climate change: USFWS coastal research
Janet R. Keough, Thomas W. Doyle, Robert E. Stewart Jr.
1991, Conference Paper, Coastal zone '91 : Proceedings of the seventh symposium on coastal and ocean management
Scenarios of global climate change are still ambiguous; however, increasing sea level and atmospheric carbon dioxide (CO2) concentrations seem certain, although rates of change are still being debated. Predictions for other aspects of climate change, such as temperature, tropical storm frequency and intensity, and precipitation, are still in debate, and...
Remote sensing of water quality
Elijah Ramsey III, John R. Jensen
1991, Conference Paper, 1991 ACSM-ASPRS Annual Convention, Baltimore, MD, Mar. 25-29, 1991, Technical Papers. Vol. 3 - Remote Sensing
Water property data were collected within 3 cooling water reservoirs (active to inactive, large [1,068 ha] to small [68.6 ha]. oligotrophic to eutrophic) at 31 locations. A description of the water characteristics was obtained including algal pigments, total suspended particles, dissolved and particulate organic matter, and total particle absorption spectra....
Modes of cross-shore sediment transport on the shoreface of the Middle Atlantic Bight
L.D. Wright, John D. Boon, S.C. Kim, J. H. List
1991, Marine Geology (96) 19-51
The mechanisms responsible for onshore and offshore sediment fluxes across the shoreface zone seaward of the surf zone were examined in a 3-year field study. The study was conducted in the southern part of the Middle Atlantic Bight in the depth region 7–17 m using instrumented tripods supporting electromagnetic current...
The distribution of seabirds and fish in relation to ocean currents in the southeastern Chukchi Sea
John F. Piatt, John L. Wells, Andrea MacCharles, Brian S. Fadely
W.A. Montevecchi, A.J. Gaston, editor(s)
1991, Conference Paper, Studies of high-latitude seabirds. 1. Behavioural, energetic, and oceanographic aspects of seabird feeding ecology (Occasional Paper 68 of the Canadian Wildlife Service)
In late August 1988, we studied the distribution of seabirds in the southeastern Chukchi Sea, particularly in waters near a major seabird colony at Cape Thompson. Foraging areas were characterized using hydrographic data obtained from hydroacoustic surveys for fish. Murres (Uria spp.) and Black-legged Kitttiwakes Rissa tridactyla breeding at Cape Thompson...
Speculations on continental crustal evolution
R. Meissner, Walter D. Mooney
1991, Eos, Earth and Space Science News (72) 585-590
The evolution of the continental crust is a topic that has challenged Earth scientists since the earliest hypotheses of crustal evolution were put forth by such luminaries as Hutton, the 18th century Scottish scientist, and later by Stille (Germany), Argand (France), and Dana (United States). Recent geophysical observations provide important...
Quartz solubility in hydrothermal seawater: An experimental study and equation describing quartz solubility for up to 0.5 M NaCl solutions
K. L. Von Damm, James L. Bischoff, Robert J. Rosenbauer
1991, American Journal of Science (291) 977-1007
Experimental investigations confirm an increase of quartz solubility in sea-water relative to distilled water. Combination of the experimental data with published data, most of which related to distilled water, permitted construction of a database for calculating an equation that fits all the data. Application of the equation indicates a shallower...
Role of exposure mode in the bioavailability of triphenyl phosphate to aquatic organisms
James N. Huckins, James F. Fairchild, Terence P. Boyle
1991, Archives of Environmental Contamination and Toxicology (21) 481-485
A laboratory study was conducted to investigate the role of the route of triphenyl phosphate (TPP) entry on its aquatic bioavailability and acute biological effects. Three TPP treatments were used for exposures of fish and invertebrates. These consisted of TPP dosed directly into water with and without clean sediment and...
A modeling assessment of the thermal regime for an urban sport fishery
John M. Bartholow
1991, Environmental Management (15) 833-845
Water temperature is almost certainly a limiting factor in the maintenance of a self-sustaining rainbow trout (Oncorhynchus mykiss, formerly Salmo gairdneri) and brown trout (Salmo trutta) fishery in the lower reaches of the Cache la Poudre River near Fort Collins, Colorado, USA. Irrigation diversions dewater portions of the river, but...
U and Sr Isotopes in ground water and calcite, Yucca Mountain, Nevada: Evidence against upwelling water
J. S. Stuckless, Z. E. Peterman, D.R. Muhs
1991, Science (254) 551-554
Hydrogenic calcite and opaline silica deposits in fault zones at Yucca Mountain, Nevada, have created considerable public and scientific controversy because of the possible development of a high-level nuclear waste repository at this location. Strontium and uranium isotopic compositions of hydrogenic materials were used to test whether the veins could...
Historic creep rate and potential for seismic slip along the Hayward Fault, California
J. J. Lienkaemper, G. Borchardt, M. Lisowski
1991, Journal of Geophysical Research (96) 18261-18283
The Hayward fault is considered the most likely source of one or more major earthquakes in the San Francisco Bay area in the next few decades. Historically, at least one, and probably two, major earthquakes (about M 6.8) occurred along the Hayward fault, one in 1836 and another in 1868. Little is...
Ground-penetrating radar: A tool for mapping reservoirs and lakes
C.C. Truman, L.E. Asmussen, H.D. Allison
1991, Journal of Soil and Water Conservation (46) 370-373
Ground-penetrating radar was evaluated as a tool for mapping reservoir and lake bottoms and providing stage-storage information. An impulse radar was used on a 1.4-ha (3.5-acre) reservoir with 31 transects located 6.1 m (20 feet) apart. Depth of water and lateral extent of the lake bottom were accurately measured by...
Science, population ecology, and the management of the American black duck
James D. Nichols
1991, Journal of Wildlife Management (55) 790-799
This essay deals with the relevance of some of the ideas of Romesburg (1981) to population ecology and management of the American black duck (Anas rubripes). Most investigations dealing with the effects of hunting regulations on black duck populations have used the hypothetico-deductive (H-D) approach of specifying a priori hypotheses...
Fossil and genetic history of a pinyon pine (Pinus edulis) isolate
Julio L. Betancourt, William Schuster, Jeffry B. Mitton, R. Scott Anderson
1991, Ecology (72) 1685-1697
The most isolated northern stand of Colorado pinyon pine (Pinus edulis) at Owl Canyon, Colorado, USA has a broad and flat size class distribution common to population expansions, with the largest and oldest trees near the center of the grove. Analyses of fossil packrat (Neotoma sp.) middens within the grove...
Low-cost field estimation of yellow perch daily ration
R.S. Hayward, F. Joseph Margraf, D.L. Parrish, B. Vondracek
1991, Transactions of the American Fisheries Society (120) 589-604
We used 2 yearsˈ diel food weight data from stomachs of Lake Erie yellow perch Perca flavescens to make Elliott‐Persson (E–P) estimates of daily ration and to construct consumption response surface (CRS) regression models. The CRS models provided relatively accurate, low‐cost estimates of daily ration from only one to four fish collections...
Analysis and modeling of long‐term stream temperatures on the Steamboat Creek Basin, Oregon: Implications for land use and fish habitat
Steven W. Hostetler
1991, Journal of the American Water Resources Association (27) 637-647
Steamboat Creek basin is an important source of timber and provides crucial spawning and rearing habitat for anadromous steelhead trout (Oncorhynchus mykiss). Because stream temperatures are near the upper limit of tolerance for the survival of juvenile steelhead, the possible long‐term effect of clear‐cut logging on...
Major and trace element mass flux in fumarolic deposits, Valley of Ten Thousand Smokes, Alaska: Rhyolite-rich protolith
J. J. Papike, T. E. C. Keith, Michael N. Spilde, C.K. Shearer, K. C. Galbreath, J.C. Laul
1991, Geophysical Research Letters (18) 1545-1548
Three fossil fumaroles in rhyolite-rich ash-flow tuff from the lower Valley of Ten Thousand Smokes (VTTS) have been studied to ascertain chemical losses and gains and mineralogical evolution during fumarolic alteration and subsequent cooling and weathering processes. Major oxide and trace element data were interpreted using the isocon method of...
H4IIE rat hepatoma cell bioassay-derived 2,3,7,8-tetrachlorodibenzo-p-dioxin equivalents in colonial fish-eating waterbird eggs from the Great Lakes
Donald E. Tillitt, Gerald T. Ankley, David A. Verbrugge, John P. Giesy, James P. Ludwig, Timothy J. Kubiak
1991, Archives of Environmental Contamination and Toxicology (21) 91-101
Fish-eating waterbirds from the Great Lakes of North America have shown symptoms of poisoning similar to those observed in laboratory exposures of various avian species to planar halogenated hydrocarbons (PHHs). PHHs, include among others, polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) and have...
Quartz dissolution in organic-rich aqueous systems
Philip C. Bennett
1991, Geochimica et Cosmochimica Acta (55) 1781-1797
Organic electrolytes are a common component of natural waters and are known to be important in many rock-water interactions. The influence of organic electrolytes on silica mobility, quartz solubility, and quartz dissolution kinetics, however, is less well understood. While there is mounting evidence supporting the presence of an aqueous organic-silica...
Changes in mallard breeding populations in relation to production and harvest rates
Robert E. Reynolds, John R. Sauer
1991, Journal of Wildlife Management (55) 483-487
We used breeding population, band recovery, and hunter harvest data to examine whether rates of productivity and harvest correlated with annual changes in mallard (Anas platyrhynchos) breeding populations. Percent change in the size of the breeding population correlated positively with an index of production rate and negatively with an index...
