Interpretation of oscillatory water levels in observation wells during aquifer tests in fractured rock
Allen M. Shapiro
1989, Water Resources Research (25) 2129-2137
Oscillatory water levels in observation wells have commonly been recorded at the beginning of aquifer tests in highly transmissive fractured formations. In this paper, oscillatory water levels are predicted by the equations coupling the fluid movement in the observation well and the fluid movement in the surrounding formation. The equivalent-porous...
Local scour at bridge abutments
David C. Froehlich
1989, Conference Paper
Comparison of local scour depths at bridge abutments computed using different equations yields a large variation in predicted values. To consolidate the fragmented results of previous investigations and assemble the most comprehensive data set possible, reported laboratory measurements of local scour at the end of an obstruction protruding from the...
Microcontaminants and reproductive impairment of the Forster's tern on Green Bay, Lake Michigan,1983
T.J. Kubiak, H.J. Harris, L.M. Smith, T.R. Schwartz, D.L. Stalling, J.A. Trick, L. Sileo, D. E. Docherty, T.C. Erdman
1989, Archives of Environmental Contamination and Toxicology (18) 706-727
For the 1983 nesting season, Forster's tern (Sterna forsteri) reproductive success was significantly impaired on organochlorine contaminated Green Bay, Lake Michigan compared to a relatively uncontaminated inland location at Lake Poygan, Wisconsin. Compared with tern eggs from Lake Poygan, eggs from Green Bay had significantly higher median concentrations...
Use of on-site high performance liquid chromatography to evaluate the magnitude and extent of organic contaminants in aquifers
D.F. Goerlitz, B.J. Franks
1989, Ground Water Monitoring Review (9) 122-129
Appraisal of ground water contaminated by organic substances raises problems of difficult sample collection and timely chemical analysis. High-performance liquid chromatography was evaluated for on-site determination of specific organic contaminants in ground water samples and was used at three study sites. Organic solutes were determined directly in water samples, with...
Tectono-stratigraphic evolution of the Early Proterozoic Wisconsin magmatic terranes of the Penokean Orogen
P.K. Sims, W. R. Van Schmus, K. J. Schulz, Z. E. Peterman
1989, Canadian Journal of Earth Sciences (26) 2145-2158
The Early Proterozoic Penokean Orogen developed along the southern margin of the Archean Superior craton. The orogen consists of a northern deformed continental margin prism overlying an Archean basement and a southern assemblage of oceanic arcs, the Wisconsin magmatic terranes. The south-dipping Niagara fault (suture) zone separates the south-facing continental...
Simulation of precipitation by weather-type analysis
G. J. McCabe Jr., L.E. Hay, L.S. Kalkstein, M. A. Ayers, D.M. Wolock
1989, Conference Paper
A new approach that uses weather-type analysis as a basis for stochastic precipitation modeling was developed and tested for Philadelphia, Pennsylvania. The weather types permit the identification of weather conditions associated with varying frequencies, intensities, and amounts of precipitation. Weather-type frequencies were used to stochastically simulate precipitation for Philadelphia and...
Mitigating oil and gas impacts in coastal wetlands
Donald R. Cahoon, Joseph C. Holmes Jr.
1989, Conference Paper, Coastal Zone: Proceedings of the Symposium on Coastal and Ocean Management
This abstract refers to technical recommendations for avoiding, minimizing, and restoring (i.e., mitigating) drilling site access impacts related to oil and gas activities in coastal wetlands through regulatory review, drawing mostly from the Louisiana experience. The two standard methods used to access wetland drilling locations are canals and roads, both...
Peak outflow from a breached embankment dam
David C. Froehlich
1989, Conference Paper
A relation for rapidly predicting the peak outflow rate from a breached embankment dam has been presented. The prediction equation is based on reliable data from 19 embankment dam failures and requires as input the volume of water in the reservoir at the time a breach begins to form, and...
Sedimentary framework of the southern Maine inner continental shelf: Influence of glaciation and sea-level change
J. T. Kelley, D. F. Belknap, R. C. Shipp
1989, Marine Geology (90) 139-147
Although the tidally influenced shoreline of Maine is longer than that of virtually any other state, almost no research on its geology has been published. In order to go some way towards remedying this, 1500 km of high-resolution seismic reflection data and 800 km of sidescan sonar imagery have been...
Small-scale digital soil maps for interpreting natural resources
Norman B. Bliss, William U. Reybold
1989, Journal of Soil and Water Conservation (44) 30-34
Effects of runoff changes and sea level rise on salinity in the Delaware River estuary
Roy A. Walters
1989, Conference Paper
The objective of this study is to investigate changes in the spatial distribution of salt in the Delaware Estuary resulting from climate induced changes in freshwater inflows and in the position of mean sea level. The approach adopted for this study is composed of two parts: An analysis of existing...
Synfolding magnetization in the Jurassic Preuss Sandstone, Wyoming- Idaho-Utah thrust belt
M.R. Hudson, R. L. Reynolds, N.S. Fishman
1989, Journal of Geophysical Research Solid Earth (94) 13681-13705
The Jurassic Preuss Sandstone, exposed in five thrust plates of the Wyoming-Idaho-Utah thrust belt, carries directions of remanent magnetization that group most tightly after only partial unfolding. Field, petrographic, and rock magnetic evidence indicates that the carrier of this magnetization is detrital, low-Ti titanomagnetite. The detrital titanomagnetite was remagnetized at...
Water transport in limestone by X-ray CAT scanning
Victor G. Mossoti, Louis M. Castanier
1989, Conference Paper
The transport of water through the interior of Salem limestone test briquettes can be dynamically monitored by computer aided tomography (commonly called CAT scanning in medical diagnostics). Most significantly, unless evaporation from a particular face of the briquette is accelerated by forced air flow (wind simulation), the distribution of water...
Historic surface slip along the San Andreas Fault near Parkfield, California
J. J. Lienkaemper, W.H. Prescott
1989, Journal of Geophysical Research Solid Earth (94) 17647-17670
The Parkfield Earthquake Prediction Experiment is focusing close attention on the 44-km-long section of the San Andreas fault that last ruptured seismically in 1966 (Ms 6.0). The 20-km-long central segment of the 1966 Parkfield rupture, extending from the mainshock epicenter at Middle Mountain southeastward to Gold Hill, forms a 1- to...
Early concepts of the role of microorganisms in hydrogeology
William Back
1989, Ground Water (27) 618-622
Hydrogeologists and geochemists have made great progress in the past few decades in understanding the water/rock interaction that are major controls on the chemical character of ground water. We also recognize that, for many reactions, we do not understand the specific mechanisms generating these reactions, such as those involved in...
Mineralogical studies of the nitrate deposits of Chile: VI. Hectorfloresite, Na9(IO3)(SO4)4, a new saline mineral
G. E. Ericksen, H. T. Evans Jr., M.E. Mrose, J. J. McGee, J.W. Marinenko, J.A. Konnert
1989, American Mineralogist (74) 1207-1214
The new mineral hectorfloresite, known to occur in only one locality in the nitrate fields of northern Chile, consists of tiny prismatic crystals, generally less than 1 mm long and 0.2 mm in diameter, in cavities in dense nitrate ore consisting of saline-cemented silt, sand, and small rock fragments. The...
Quarterly Wildlife Mortality Report
K. A. Converse, R. Windingstad, K. Roertgen, T. Roffe
1989, Supplement to the Journal of Wildlife Diseases (25)
Sidescan sonar examination of deteriorated revetments and bulkheads along Chicago's lake front
Michael J. Chrzastowski
1989, Conference Paper, Coastal Zone: Proceedings of the Symposium on Coastal and Ocean Management
Lakefill for parks along Chicago's lake front is primarily defended with aged, deteriorated revetments. Survey by 100- and 500-kHz sidescan sonar documents that structural failure of the revetments is not related to lake-bottom undermining. The size and weight of the rock fill in the cribs is identified as a critical...
Response of selected binomial coefficients to varying degrees of matrix sparseness and to matrices with known data interrelationships
A.W. Archer, C.G. Maples
1989, Mathematical Geology (21) 741-753
Numerous departures from ideal relationships are revealed by Monte Carlo simulations of widely accepted binomial coefficients. For example, simulations incorporating varying levels of matrix sparseness (presence of zeros indicating lack of data) and computation of expected values reveal that not only are all common coefficients influenced by zero data, but...
Paleozoic age of the Capo Spartivento Orthogneiss, Sardinia, Italy
K.R. Ludwig, B. Turi
1989, Chemical Geology: Isotope Geoscience Section (79) 147-153
Zircon UPb">UPb isotope dating of the Capo Spartivento Orthogneiss, proposed as a possible Precambrian basement of southern Sardinia, shows that this rock is Caledonian in age. Conventional multi-grain analyses yield an imprecise age of roughly 480 Ma, and ion-microprobe analyses of cores of single grains yield...
Reinterpretation of lower Mesozoic rocks on the Chilkat Peninsula, Alaska, as a displaced fragment of Wrangellia
George Plafker, C.D. Blome, Norman J. Silberling
1989, Geology (17) 3-6
The southern Chilkat Peninsula is underlain by low-grade metamorphic rocks consisting of a thick unit of greenstone, in part of Carnian age, that is locally overlain by an attenuated section of calcareous sedimentary rocks and chart of latest Carnian to late Norian age...
Brain cholinesterase activity of nestling great egrets snowy egrets and black-crowned night-herons
T. W. Custer, H. M. Ohlendorf
1989, Journal of Wildlife Diseases (25) 359-363
Inhibition of brain cholinesterase (ChE) activity in birds is often used to diagnose exposure or death from organophosphorus or carbamate pesticides. Brain ChE activity in the young of altricial species increases with age; however, this relationship has only been demonstrated in the European starling (Sturnus vulgaris). Brain ChE activity of...
Subsurface temperatures and geothermal gradients on the North Slope, Alaska
Timothy S. Collett, Kenneth J. Bird, Leslie B. Magoon
1989, Society of Petroleum Engineers of AIME, (Paper) SPE
Geothermal gradients as interpreted from a series of high-resolution stabilized well-bore-temperature surveys from 46 North Slope, Alaska, wells vary laterally and vertically throughout the near-surface sediment (0-2,000 m). The data from these surveys have been used in conjunction with depths of ice-bearing permafrost, as interpreted from 102 well logs, to...
Notes on sedimentation activities calendar year 1988
U.S. Interagency Advisory Committee on Water Data- Subcommittee on Sedimentation
1989, Report
This report is a digest of information furnished by Federal agencies conducting sedimentation investigations. The decision to publish the report was made in 1946, from a proposal by the Chairman of the Federal Interagency River Basin Committee, Subcommittee on Ground Water. The subcommittee approved the proposal and agreed to issue...
Seasonal reproductive development of Lampsilis cardium, Amblema plicata plicata, and Potamilus alatus
L. E. Holland Bartels, T. W. Kammer
1989, Journal of Freshwater Ecology (5) 87-92
Adult specimens of three species of freshwater mussels common to the upper Mississippi River were examined histologically to determine seasonal patterns of development in gametogenesis and release of glochidia. Full maturation of gonadal materials in Lampsilis cardium (formerly L. ovata ventricosa), a long-term breeder, occurred when ambient river temperatures...
