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Page 1748, results 43676 - 43700

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Modelling the bathymetry of the Antarctic continental shelf
Uri S. ten Brink, William P. Rogers, R. M. Kirkham
1992, Conference Paper, Recent progress in Antarctic Earth Science
Continental shelves are typically covered by relatively shallow waters (<200 m) which deepen gradually from the coast to the shelf edge. The continental shelf around Antarctica is deeper than normal (400-700m) and is characterized in many areas by a nearshore trough (up to 1 km deep) that gradually shallows toward...
Management of habitat for breeding and migrating shorebirds in the Midwest
Jan Eldridge
1992, Fish and Wildlife Leaflet 13.2.14
Shorebirds have always relied on the extensive network of natural wetlands from Texas to North Dakota. This network has now been fractured by wetland drainage and agriculture to the point where suitable wetlands are absent in much of the Midwest. Habitat loss and the resulting risk of population decline highlight...
Recovery of benthic-invertebrate communities in the White River near Indianapolis, Indiana, USA, following implementation of advanced treatment of municipal wastewater
Charles G. Crawford, David J. Wangsness
1992, Archiv fur Hydrobiologie (126) 67-84
The City of Indianapolis, Indiana, USA, completed construction of advanced-wastewater-treatment systems to enlarge and upgrade existing secondary-treatment processes at the City’s two municipal wastewater-treatment plants in 1983. These plants discharge their effluent to the White River. A study was begun in 1981 to evaluate the effects of municipal wastewater on...
Semi-implicit finite difference methods for three-dimensional shallow water flow
Vincenzo Casulli, Ralph T. Cheng
1992, International Journal for Numerical Methods in Fluids (15) 629-648
A semi-implicit finite difference method for the numerical solution of three-dimensional shallow water flows is presented and discussed. The governing equations are the primitive three-dimensional turbulent mean flow equations where the pressure distribution in the vertical has been assumed to be hydrostatic. In the method of solution a minimal degree...
Ecology of playa lakes
David A. Haukos, Loren M. Smith
1992, Fish and Wildlife Leaflet 13.3.7
Between 25,000 and 30,000 playa lakes are in the playa lakes region of the southern high plains (Fig. 1). Most playas are in west Texas (about 20,000), and fewer, in New Mexico, Oklahoma, Kansas, and Colorado. The playa lakes region is one of the most intensively cultivated areas of North...
Regional evaluations of acid deposition effects on forests: Eastern spruce-fir
A. H. Johnson, A. J. Friedland, E. K. Miller, J. J. Battles, Thomas G. Huntington, D. R. Vann, G. R. Strimbeck
1992, Book chapter, Atmospheric deposition and forest nutrient cycling: A synthesis of the integrated forest study
Having reviewed the results of the Integrated Forest Study (IFS) project, we now try to place the results in a larger perspective by very briefly summarizing acid deposition effects and their potential role in forest health in the several forest types represented in the IFS project. This chapter gives brief...
Deep-water facies of the Lisburne Group, west-central Brooks Range, Alaska
Julie A. Dumoulin, Anita G. Harris, Jeanine M. Schmidt
Dennis K. Thurston, Kazuya Fujita, editor(s)
1992, Conference Paper, Proceedings: 1992 international conference on Arctic margins (MMS 94-0040)
Deep-water lithofacies of the Lisburne Group (chiefly Carboniferous) occur in thurst sheets in the western part of the foreland fold-and-thrust belt of the Brooks Range and represent at least three discrete units. The Kuna Formation (Brooks Range allochthon) consists mostly of spiculitic mudstone and lesser shale; subordinate carbonate layers are...
Acid base accounting--An improved method of interpreting overburden chemistry to predict the quality of coal-mine drainage
Keith Brady, Charles A. Cravotta III,
1992, Conference Paper, Proceedings Thirteenth Annual West Virginia Surface Mine Drainage Task Force Symposium
Acidic mine drainage (AMD), which results from the accelerated oxidation of pyrite (FeS2 ) in mined coal and overburden, has contaminated thousands of miles of streams in the Appalachian region of the United States. Acid‐base accounting (ABA), which simplifies the complex hydrogeochemical system through use of a limited number of...
Physical oceanographic investigation of Massachusetts and Cape Cod Bays
W. Rockwell Geyer, George B. Gardner, Wendell S. Brown, James D. Irish, Bradford Butman, T.C. Loder, Richard P. Signell
1992, Report
This physical oceanographic study of the Massachusetts Bays (fig. 1) was designed to provide for the first time a bay-wide description of the circulation and mixing processes on a seasonal basis. Most of the measurements were conducted between April 1990 and June 1991 and consisted of moored observations to study...
On the age of the penultimate full glaciation of New England
R. N. Oldale, S.M. Colman
1992, GSA Special Papers (270) 163-170
Tills that discontinuously underlie the late Wisconsinan till throughout New England represent the penultimate full glaciation of the region. In southern New England, the late Wisconsinan till and the tills that locally underlie it are informally referred to as upper and lower tills, respectively. For the most part, the ages...
Rare earth, major and trace element composition of Leg 127 sediments
R.W. Murray, Marilyn R. Buchholtz ten Brink, Hans-Juergen Brumsack, David C. Gerlach, G. Price Russ
1992, Conference Paper, Proceedings of the Ocean Drilling Program, Scientific Results
The relative effects of paleoceanographic and paleogeographic variations, sediment lithology, and diagenetic processes on the final preserved chemistry of Japan Sea sediments are evaluated by investigating the rare earth element (REE), major element, and trace element concentrations in 59 squeeze-cake whole-round and 27 physical-property sample residues from Sites 794, 795,...
A tsunami about 1000 years ago in Puget Sound, Washington
Brian F. Atwater, A.L. Moore
1992, Science (258) 1614-1617
Water surged from Puget Sound sometime between 1000 and 1100 years ago, overrunning tidal marshes and mantling them with centimeters of sand. One overrun site is 10 kilometers northwest of downtown Seattle; another is on Whidbey Island, some 30 kilometers farther north. Neither site has been widely mantled with sand...
Herbicide and nitrate variation in alluvium underlying a cornfield at a site in Iowa County, Iowa
S. J. Kalkhoff, M.G. Detroy, K. Cherryholmes, R.L. Kuzniar
1992, Journal of the American Water Resources Association (28) 1001-1011
A hydrologic investigation to determine vertical and seasonal variation of atrazine, alachlor, cyanazine, and nitrate at one location and to relate the variation to ground-water movement in the Iowa River alluvium was conducted in Iowa County, Iowa, from March 1986 to December 1987. Water samples were collected at discrete intervals...
Descriptive risk assessment of the effects of acidic deposition on Rocky Mountain amphibians
Paul Stephen Corn, Frank A. Vertucci
1992, Journal of Herpetology (26) 361-369
We evaluated the risk of habitat acidification to the six species of amphibians that occur in the mountains of Colorado and Wyoming. Our evaluation included extrinsic environmental factors (habitat sensitivity and amount of acidic atmospheric deposition) and species-specific intrinsic factors (sensitivity to acid conditions, habitat preferences, and timing of breeding)....
Effects of irrigation on seed production and vegetative characteristics of four moist-soil plants on impounded wetlands in California
D.M. Mushet, N.H. Euliss Jr., S.W. Harris
1992, Wetlands (12) 204-207
We examined the effects of irrigation on 4 moist-soil plants commonly managed for waterfowl in the Sacramento Valley, California. Irrigation resulted in taller and heavier swamp timothy (Heleochloa schoenoides), pricklegrass (Crypsis niliaca), and sprangletop (Leptochloa fasicularis). Barnyardgrass (Echinochloa crusgalli) grew taller in irrigated wetlands, but no significant...