Raster and vector processing for scanned linework
David D. Greenlee
1987, Photogrammetric Engineering and Remote Sensing (53) 1383-1387
An investigation of raster editing techniques, including thinning, filling, and node detecting, was performed by using specialized software. The techniques were based on encoding the state of the 3-by-3 neighborhood surrounding each pixel into a single byte. A prototypical method for converting the edited raster linkwork into vectors was also...
Evaluation of the improvement in sensitivity of nested frequency plots to vegetational change by summation
Stuart D. Smith, Stephen C. Bunting, M. Hironaka
1987, Western North American Naturalist (47) 299-307
At four sites in Idaho, frequency was measured separately with three different-sized plots (10 x 25, 15 x 33.5, and 20 x 50 cm) arranged in a nested configuration. These individual frequency values were added together to create a summed “frequency.” This summed value was compared to the original frequency...
Design of a spatial data structure using the relational normal forms
Jan W. van Roessel
1987, International Journal of Geographical Information Systems (1) 33-50
In previous work, a relational data structure aimed at the exchange of spatial data between systems was developed. As this data structure was relational it was of first normal form, but compliance with the higher normal forms was not investigated. Recently, a new procedural method for composing fully normalized data...
Gulf trough: The Atlantic connection
Peter Popenoe, Vernon J. Henry, Faisal M. Idris
1987, Geology (15) 327-332
Analyses of seismic reflection profiles and stratigraphic data indicate a continuation of the Gulf trough trend across eastern South Carolina and offshore between Cape Fear and Cape Hatteras, North Carolina. Seismic profiles show a linear northeast-trending zone of nondeposition and erosion and areas...
Sidescan sonar as a tool for detection of demersal fish habitats
Kenneth W. Able, David C. Twichell, Churchill B. Grimes, R. S. Jones
1987, Fishery Bulletin (85) 725-736
Sidescan sonar can be an effective tool for the determination of the habitat distribution of commercially important species. This technique has the advantage of rapidly mapping large areas of the seafloor. Sidescan images (sonographs) may also help to identify appropriate fishing gears for different types of seafloor or areas to...
Cenozoic unconformities and depositional supersequences of North Atlantic continental margins: Testing the Vail model
C. Wylie Poag, Lauck W. Ward
1987, Geology (15) 159-162
Integrated outcrop, borehole, and seismic reflection stratigraphy from the U.S. and Irish margins of the North Atlantic basin reveals a framework of Cenozoic depositional supersequences and interregional unconformities that resembles the Vail depositional model. Paleo-bathymetric and paleoceanographic analyses of associated microfossil assemblages indicate...
Effects of disaggregation on a fine-grained marine mud by two ultrasonic devices
Richard R. Rendigs, Judith A. Commeau
1987, Journal of Sedimentary Research (57) 786-787
No abstract available....
Field guide to sedimentary structures in the Navajo and Entrada sandstones in southern Utah and northern Arizona
David M. Rubin, Ralph E. Hunter
1987, Conference Paper, Field-trip guidebook, 100th annual meeting, The Geological Society of America, Phoenix, Arizona, October 26-29, 1987
This field-trip guide describes the common sedimentary structures that occur in eolian sands. The outcrops that are described occur in the Navajo and Entrada Sandstones between the areas of Page, Arizona and St. George, Utah (figure I), but the sedimentary structures of these two sandstones are typical of most eolian...
Lower Paleozoic carbonate rocks of the Baird Mountains quadrangle, western Brooks Range, Alaska
Julie A. Dumoulin, Anita G. Harris
Irvin L. Tailleur, Paul Weimer, editor(s)
1987, Book chapter, Alaskan North Slope Geology, Volumes I and II (SEPM Book 50)
Lower Paleozoic carbonate rocks in the Baird Mountains quadrangle form a relatively thin, chiefly shallow-water succession that has been thrust-faulted and metamorphosed to blueschist and greenschist facies. Although this succession was thought to be mostly Devonian until recently, a large part of it is in fact pre-Silurian in age.Middle and...
Decomposition rates of peat in drained and undrained wetlands
J.M. Friedman
K. Mutz, editor(s)
1987, Conference Paper, Proceedings of the Eighth Annual Meeting of the Society of Wetland Scientists
No abstract available....
Hydrogeology of stratified-drift aquifers and water quality in the Nashua Regional Planning Commission Area, south-central New Hampshire
K. W. Toppin
1987, Water-Resources Investigations Report 86-4358
The Nashua Regional Planning Commission area in south-central New Hampshire is a 12-community area that is experiencing increases in population and in demands for water supply. The study area is underlain by 129 sq mi (40% of the area) of stratified drift which, where sufficiently saturated and permeable, form the...
Ground-water flow and shallow-aquifer properties in the Rio Grande inner valley south of Albuquerque, Bernalillo County, New Mexico
K. D. Peter
1987, Water-Resources Investigations Report 87-4015
The purpose of this investigation was to describe the water table configuration and its temporal variations, estimate aquifer properties, and evaluate the interaction of groundwater and surface water in the inner valley of the Rio Grande in southern Albuquerque, New Mexico, where groundwater contamination is a continuing concern. The upper...
Geochemical evolution of waters within the north coast limestone aquifers of Puerto Rico: A conceptualization based on a flow path in the Barceloneta area
A. J. Roman-Mas, R. W. Lee
1987, Water-Resources Investigations Report 86-4080
Water samples along a groundwater flow path in the Barceloneta area, Puerto Rico, were collected from wells screened in the Montebello Limestone Member of the Cibao Formation (artesian aquifer) and in the overlying Aguada and Aymamon Limestones (water table aquifer). The groundwater chemistry changes as water migrates from recharge areas...
Estimating generalized skew of the log-Pearson Type III distribution for annual peak floods in Illinois
Kevin A. Oberg, Dean M. Mades
1987, Water-Resources Investigations Report 86-4008
Four techniques for estimating generalized skew in Illinois were evaluated: (1) a generalized skew map of the US; (2) an isoline map; (3) a prediction equation; and (4) a regional-mean skew. Peak-flow records at 730 gaging stations having 10 or more annual peaks were selected for computing station skews. Station...
Effect of urbanization on the water resources of eastern Chester County, Pennsylvania
R. A. Sloto
1987, Water-Resources Investigations Report 87-4098
The effects of human activity on the water resources of a 207-square-mile area of eastern Chester County was evaluated. The most serious consequence of urbanization is the contamination of ground water by volatile organic compounds, which were detected in 39 percent of the 70 wells sampled. As many as nine...
Flood characteristics for the Nisqually River and susceptibility of Sunshine Point and Longmire facilities to flooding in Mount Rainier National Park, Washington
L. M. Nelson
1987, Water-Resources Investigations Report 86-4179
Inundation from 25-, 50-, 100-, and 500-year floods at Sunshine Point and Longmire facilities and the Longmire visitors ' center and ranger station generally is not a serious hazard as long as the existing dikes and banks of the Nisqually River and Tahoma Creek remain intact and flood capacities of...
Ground-water withdrawals and changes in ground-water levels, ground-water quality, and land-surface subsidence in the Houston district, Texas, 1980-84
James F. Williams III, C.E. Ranzau Jr.
1987, Water-Resources Investigations Report 87-4153
During 1980-84, ground-water withdrawals from the Chicot and Evangeline aquifers in the Houston district decreased from 511 million gallons per day to 444 million gallons per day. This 13-percent decrease was due to the increased availability of surface water and a decreased demand for water. The largest decreases in ground-water...
Developing a state water plan: Ground-water conditions in Utah, spring of 1987
Dale E. Wilberg, G. J. Smith, D. Michael Roark, Patrick M. Lambert, V.L. Jensen, Gail E. Cordy, Carole B. Burden, Michael Enright, D. C. Emett, Susan A. Thiros, G. W. Sandberg, R. W Puchta, L. R. Herbert
1987, Cooperative Investigations Report 27
This is the twenty-fourth in a Series of annual reports that describe ground-water Conditions in Utah. Reports in the series, prepared cooperatively by the U.S. Geological Survey and the Utah Division of Water Resources, provide data to enable interested parties to keep abreast of changing ground-water conditions.This report, like...
Aggressive encounters between tundra swans and greater white-fronted geese during brood rearing
Craig R. Ely, David A. Budeau, Una G. Swain
1987, The Condor (89) 420-422
Interspecific aggression in waterfowl (Anatidae) is relatively common (McKinney 1965; Kear 1972; Savard 1982, 1984), but interactions leading to mortality of one of the combatants are rarely-observed in the wild. A recent debate (Livezey and Humphrey 1985a, 1985b; Nuechterlein and Storer 1985a, 1985b; Murray 1985) has centered on the proximate...
Feeding activity, rate of consumption, daily ration, and prey selection of major predators in John Day Reservoir
T.P. Poe, D.E. Palmer, H.C. Hansel, S. Vigg, P.T. Lofy, S.D. Duke, M.J. Parsley, L.A. Prendergast, R. Burkhardt, C. Burley
1987, Report
No abstract available ...
Limnological and fishery studies on Lake Sharpe, a main-stem Missouri River reservoir, 1964-1975
F.C. June, L.G. Beckman, J.H. Elrod, G.K. O’Bryan, D.A. Vogel
1987, Report
No abstract available ...
Common Murre (Uria aalge) attendance patterns at Cape St. Mary's, Newfoundland
John F. Piatt, Ruth L. McLagan
1987, Canadian Journal of Zoology (65) 1530-1534
Attendance patterns of common murres (Uria aalge) at Cape St. Mary's, Newfoundland, were observed during hatching to post-fledging periods of 1980 to 1984. Six study plots on breeding ledges (ca. 450 birds total) and a "club" on the water were monitored for seasonal fluctuations in numbers attending. Attendance on ledges...
Winter diets of common murres and marbled murrelets in Kachemak Bay, Alaska
Gerald A. Sanger
1987, The Condor (89) 426-430
Knowledge of the winter diets of seabirds in high latitudes like Alaskan waters has been an elusive aspect of their biology. Scanty information on winter diets of Common Murres (Uria aalge) are available from the Pribilof Islands (Preble and McAtee 1923), California (Baltz and Morejohn 1977), Kodiak Island (Kraznow and...
Dehydration of seabird prey during transport to the colony: Effects on wet weight energy densities
W.A. Montevecchi, John F. Piatt
1987, Canadian Journal of Zoology (65) 2822-2824
We present evidence to indicate that dehydration of prey transported by seabirds from capture sites at sea to chicks at colonies inflates estimates of wet weight energy densities. These findings and a comparison of wet and dry weight energy densities reported in the literature emphasize the importance of (i) accurate...
Resurrection Peninsula and Knight Island ophiolites and recent faulting on Montague Island, southern Alaska
Steven W. Nelson, Marti L. Miller, Julie A. Dumoulin
1987, Book chapter, Cordilleran section of the Geological Society of America: Centennial Field Guide volume 1
The Resurrection Peninsula forms the east side of Resurrection Bay (Fig. 1). The city of Seward is located at the head of the bay and can be reached from Anchorage by highway (127 mi;204 km). Relief ranges from 1,434 ft (437 m) at the southern end of the peninsula...
