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Page 2256, results 56376 - 56400

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Long-term observations of bottom current and bottom sediment movement on the mid-Atlantic continental shelf
Bradford Butman, Marlene A. Noble, David W. Folger
1979, Journal of Geophysical Research: Oceans (84) 1187-1205
Long-term in situ observations made at three locations on the mid-Atlantic continental shelf during 1975–1976 clearly show intermittent movement of bottom sediment caused by currents, waves, and other forcing mechanisms. In winter, storm-associated bottom currents greater than 30 cm s−1 resuspended and transported sediments. Net water particle excursions during storms were...
History, landforms, and vegetation of the estuary's tidal marshes
B.F. Atwater, S.G. Conrad, J.N. Dowden, C.W. Hedel, R.L. MacDonald, W. Savage
T. J. Conomos, editor(s)
1979, Book chapter, San Francisco Bay : the urbanized estuary : investigations into the Natural History of San Francisco Bay and Delta with reference to the influence of man : fifty-eighth annual meeting of the Pacific Division/American Association for the Advancement of Science held at San Francisco State University, San Francisco, California, June 12-16, 1977
No abstract available....
A two-dimensional hydrodynamic model of a tidal estuary
Roy A. Walters, Ralph T. Cheng
1979, Advances in Water Resources (2) 177-184
A finite element model is described which is used in the computation of tidal currents in an estuary. This numerical model is patterned after an existing algorithm and has been carefully tested in rectangular and curve-sided channels with constant and variable depth. One of the common uncertainties in this class...
Middle Miocene marine diatoms from the Hawthorn Formation within the Ridgeland Trough, South Carolina and Georgia
William H. Abbott, George W. Andrews
1979, Micropaleontology (25) 225-271
Diatomaceous sediments in outcrops of the Miocene Hawthorn Formation at Dawsons Landing in South Carolina and at Berrys Landing in Georgia, have yielded a total of 111 marine diatom taxa. Varving of the diatomaceous clay suggests that the diatoms were deposited in a restricted basin or lagoonal area that had...
Managing the rippling stream: decisionmaking in natural resource administration
Harvey R. Doerksen, Berton L. Lamb
1979, Journal of the American Water Resources Association (15) 1707-1715
This article addresses the conflict which exists within the water resources decisionmaking arena over the allocation of water for instream uses. The discussion reviews the literature on public administration regarding decisionmaking, and is based on research performed by the authors which synthesizes a model of decisionmaking. This model can be...
Tolerance of developing salmonid eggs and fry to nitrate exposure
John W. Kincheloe, Gary A. Wedemeyer, David L. Koch
1979, Bulletin of Environmental Contamination and Toxicology (23) 575-578
This paper reports on tests which show significant effects on early salmonid life stages of nitrates at levels commonly found in groundwaters in geographical areas that are influenced by fertilizer application. It has long been known, from fish cultural experience, that in certain site specific locations, chronic problems can be...
Chemical changes in an industrial waste liquid during post-injection movement in a limestone aquifer, Pensacola, Florida
G. G. Ehrlich, E.M. Godsy, C.A. Pascale, John Vecchioli
1979, Groundwater (17) 562-573
An industrial waste liquid containing organonitrile compounds and nitrate ion has been injected into the lower limestone of the Floridan aquifer near Pensacola, Florida since June 1975. Chemical analyses of water from monitor wells and backflow from the injection well indicate that organic carbon compounds are converted to CO2 and...
Effects of karst and geologic structure on the circulation of water and permeability in carbonate aquifers
V. T. Stringfield, J. R. Rapp, R.B. Anders
1979, Journal of Hydrology (43) 313-332
The results of the natural processes caused by solution and leaching of limestone, dolomite, gypsum, salt and other soluble rocks, is known as karst. Development of karst is commonly known as karstification, which may have a pronounced effect on the topography, hydrology and environment, especially where such karst features as...
Hydrogeology of glacial-terrain lakes, with management and planning applications
S.M. Born, S.A. Smith, D.A. Stephenson
1979, Journal of Hydrology (43) 7-43
The subject of the relationship between groundwater and lakes is characterized by sparse information and, in general, has received limited attention by hydrologists. Nevertheless, the hydrogeologic regime of lakes must be adequately assessed in order to intelligently manage lakes and their related shorelands. This paper is a compilation of hydrogeologic...
Hydraulic potential in Lake Michigan bottom sediments
K. Cartwright, C.S. Hunt, G.M. Hughes, R.D. Brower
1979, Journal of Hydrology (43) 67-78
The magnitude and direction of groundwater flux in the bottom sediments of Lake Michigan were deduced from measurements made during three shipboard cruises between 1973 and 1975. These factors affect the geochemical environment of the sediments and therefore the distribution of trace elements reported to be present. The near-shore, sandy-bottom...
Simulated changes in potentiometric levels resulting from groundwater development for phosphate mines, west-central Florida
W.E. Wilson, J. M. Gerhart
1979, Journal of Hydrology (43) 491-515
A digital model of two-dimensional groundwater flow was used to predict changes in the potentiometric surface of the Floridan aquifer resulting from groundwater development for proposed and existing phosphate mines during 1976-2000. The modeled area covers 15,379 km2in west-central Florida.In 1975, groundwater withdrawn from the Floridan aquifer for irrigation, phosphate...
Contribution of groundwater modeling to planning
J.E. Moore
1979, Journal of Hydrology (43) 121-128
The consideration of groundwater in water-resource planning frequently has been neglected because many planners believed that groundwater could not be adequately evaluated in terms of availability, quality, cost of development, or effect of development on the surface-water supply. The development of predictive groundwater models now provides the water planner with...
Fresh-water cementation of a 1,000-year-old oolite
R. B. Halley, P. M. Harris
1979, Journal of Sedimentary Petrology (49) 969-987
Calcite cementation of aragonite ooid sand is producing oolite on Joulters Cays, Bahamas. During the last 1,000 years, calcite cement has formed at an average rate of between 27 and 55 cm3 /m3 /yr and is derived from dissolution of ooid aragonite in fresh water. The dissolution-reprecipitation of carbonate minerals...
Undersea topography and distribution of dolphins of the genus Delphinus in the Southern California Bight
Clifford A. Hui
1979, Journal of Mammalogy (60) 521-527
Aerial surveys totalling 21,902 km were analyzed in the Southern California Bight. Although the genus Delphinus is easily recognizable from aircraft, the different species are not detectable in these flights. Delphinus occur more frequently in areas of high relief than in areas of low relief. The depth of the water does not appear to...
Comparison of the TRM of the Yellowstone Group and the DRM of some Pearlette ash beds
Richard L. Reynolds
1979, Journal of Geophysical Research B: Solid Earth (84) 4525-4532
Air fall ash beds (Pearlette) originating from rhyolitic eruptions in the Yellowstone‐Island Park region of Wyoming and Idaho are discontinuous but widespread throughout the western United States. Accumulation and deposition of ashes occurred in low‐energy fluvial and lacustrine environments. These ash beds have been correlated, according to their chemistry and...
Uptake of methoxychlor from food and water by the American toad (Bufo americanus)
R.J. Hall, D. Swineford
1979, Bulletin of Environmental Contamination and Toxicology (23) 335-337
Various studies (Mulla et al. 1963; Ferguson and Gilbert 1967; Cooke 1973) have examined the effects of pesticides on anuran amphibians, but the routes of contaminant uptake by transformed amphibians have not been evaluated. The need of frogs and toads to imbibe water from natural surface water would seem to...
Organochlorine poisoning of herons
Harry M. Ohlendorf, Douglas M. Swineford, Louis N. Locke
1979, Conference Paper, Proceedings of the 1979 conference of the Colonial Waterbird Group
Over a period of years interested individuals have submitted many dead or moribund herons of various species to our laboratory to learn whether the birds had been affected by diseases or organochlorine poisoning. Residue concentrations in carcasses of birds and mammals are considered the best measure of sublethal exposure,...