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165990 results.

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Page 5176, results 129376 - 129400

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Field verification of reconstructed dam-break flood, Laurel Run, Pennsylvania
Cheng-lung Chen, Jeffrey T. Armbruster
1979, Open-File Report 79-1483
A one-dimensional dam-break flood routing model is verified by using observed data on the flash flood resulting from the failure of Laurel Run Reservoir Dam near Johnstown, Pennsylvania. The model has been developed on the basis of an explicit scheme of the characteristics method with specified time intervals. The model...
Mineral resources of the Citico Creek Wilderness Study Area, Monroe County, Tennessee
John F. Slack, E. R. Force, P. T. Behum, B. B. Williams
1979, Open-File Report 79-231
The proposed Citico Creek Wilderness comprises about 5,670 hectares (56.7 km2) in the Cherokee National Forest south of the Little Tennessee River in easternmost Monroe County, Tennessee. Principal drainages are Citico Creek and Doublecamp Creek. Rocks of the study area include greenschist-facies arkosic metasandstone, metagraywacke, slate, and metaconglomerate of the...
Hydrologic data from urban watersheds in the Tampa Bay area, Florida
Miguel A. Lopez, D.M. Michaelis
1979, Water-Resources Investigations Report 78-125
Hydrologic data are being collected in 10 urbanized watersheds located in the Tampa Bay area, Florida. The gaged watersheds have impervious areas that range from 19 percent for a residential watershed in north Tampa to nearly 100 percent for a downtown Tampa watershed. Land-use types, including roads, residential, commercial, industrial,...
Surveying Antarctica: from dogsled to satellite
Richard S. Williams Jr.
1979, Air and Space (3) 3-4
Base maps of Antarctica are needed at scales of 1:250,000 to plot scientific data, yet after 20 years of a major mapping effort, only about 20 percent of the continent has been accurately mapped using aerial photographs and ground surveys. Encompassing nearly 14.3 million square kilometers (5.5 million square miles),...
Satellite-aided evaluation of population exposure to air pollution
William J. Todd, Anthony J. George Jr., Nevin A. Bryant
1979, Environmental Science & Technology (13) 970-974
The Clean Air Act Amendments of 1977 set schedules for states to implement regional, spatial assessments of air quality impacts. Accordingly, the U.S. Environmental Protection Agency recently published guidelines for quantifying population exposure to adverse air quality impact by using air quality and population data by census tracts. Our research...
Satellites monitor Atlanta regional development
William J. Todd, C.C. Blackmon, R.G. Rudasill Jr.
1979, Practicing Planner (9) 6-10
Since the adoption of a Regional Development Plan in 1975, the Atlanta Regional Commission has investigated methods for monitoring regional development patterns in a periodic, efficient manner. A promising approach appears to be the use of Landsat satellite data. In cooperation with the Earth Resources Observation Systems (EROS) Data Center,...
Inventory and mapping of flood inundation using interactive digital image analysis techniques
Wayne G. Rohde, Charles A. Nelson, J. V. Taranik
1979, Canadian Journal of Remote Sensing (5) 43-52
LANDSAT digital data and color infra-red photographs were used in a multiphase sampling scheme to estimate the area of agricultural land affected by a flood. The LANDSAT data were classified with a maximum likelihood algorithm. Stratification of the LANDSAT data, prior to classification, greatly reduced misclassification errors. The classification results...
What is a picture worth? A history of remote sensing
Gerald K. Moore
1979, Hydrological Sciences Bulletin (24) 477-485
Remote sensing is the use of electromagnetic energy to measure the physical properties of distant objects. It includes photography and geophysical surveying as well as newer techniques that use other parts of the electromagnetic spectrum. The history of remote sensing begins with photography. The origin of other types of remote...
Infrared film for aerial photography
William H. Anderson
1979, Irrigation Age (13) 68-69
Considerable interest has developed recently in the use of aerial photographs for agricultural management. Even the simplest hand-held aerial photographs, especially those taken with color infrared film, often provide information not ordinarily available through routine ground observation. When fields are viewed from above, patterns and variations become more apparent,...
Ancient processes at the site of southern San Francisco Bay, movement of the crust and changes in sea level
B.F. Atwater
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
Abstract not available....
Multichannel seismic depth sections and interval velocities over outer continental shelf and upper continental slope between Cape Hatteras and Cape Cod: Rifted margins
John A. Grow, Robert E. Mattick, John S. Schlee
1979, Book chapter, Geological and geophysical investigations of continental margins
Six computer-generated seismic depth sections over the outer continental shelf and upper slope reveal that subhorizontal Lower Cretaceous reflectors continue 20 to 30 km seaward of the present shelf edge. Extensive erosion on the continental slope has occurred primarily during the Tertiary, causing major unconformities and retreat of the shelf...