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Page 1660, results 41476 - 41500

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Maps of the World
Water Resources Division, U.S. Geological Survey
1994, Report
Because a map conveys information visually, it is often the best way for presenting facts about the size, shape, and appearance of our world and about the changes that people have imposed on the world. Some world maps show the mountains, rivers, oceans, and plains that make up the face...
Using maps in genealogy
Water Resources Division, U.S. Geological Survey
1994, Report
In genealogy, maps are most often used as clues to where public or other records about an ancestor are likely to be found. Searching for maps seldom begins until a newcomer to genealogy has mastered basic genealogical routines...
USGS Maps
Water Resources Division, U.S. Geological Survey
1994, Report
Most USGS topographic maps use brown contours to show the shape and elevation of the terrain. Elevations are usually shown in feet, but on some maps they are in meters. Contour intervals vary, depending mainly on the scale of the map and the type of terrain....
The United States Geological Survey Library System
Water Resources Division, U.S. Geological Survey
1994, Report
The U.S. Geological Survey Library, established in 1882, is one of the largest earth science libraries in the world. The Library System consists of the headquarters library in Reston, Virginia, and three branch libraries in Denver, Colorado; Flagstaff, Arizona; and Menlo Park, California...
National standards and guidelines for pesticides in water, sediment, and aquatic organisms
L.H. Nowell, E.A. Resek
1994, Book chapter, Reviews of environmental contamination and toxicology
The effects of pesticides1 on water quality commonly are assessed by comparing measured concentrations of individual pesticide compounds in the environment with concentrations that have been determined to have potential adverse effects on humans, aquatic organisms, or other beneficial uses of water. Direct evaluation of the adverse effects of every pesticide...
Wetland loss rates and agricultural drainage
A. J. Douglas
1994, Book, Water Policy and Management: Solving the Problems: Proceedings of the 21st Annual Conference of the American Society of Civil Engineers
No abstract available....
Preliminary results of a binational research cruise in the Western Arctic Ocean
Arthur Grantz, P. E. Hart, R. L. Phillips, Michael McCormick, R.G. Perkin, Ruth Jackson, A. Gagnon, Shusun Li, Carl Byers, K. R. Schwartz
1994, Polar Geography (18) 187-210
This paper is a condensed version of a report on the preliminary results of a research cruise under the direction of the U. S. Geological Survey, on board the United States Coast Guard Cutter Polar Star to Northwind Ridge and Canada Basin of the Western Arctic Ocean, during the period August 16‐September...
Mantle helium in the groundwater of the Mirror Lake Basin, New Hampshire, USA, 1994
T. Torgersen, S. Drenkard, K. Farley, P. Schlosser, Allen M. Shapiro
1994, Book chapter, Noble gas geochemistry and cosmoschemistry
Helium isotope analyses of ground waters from the Mirror Lake drainage basin in central New Hampshire (USA) show helium in excess of air-saturated water by up to 200x. The freon ages of these waters are younger than 50 years, consistent with the local hydrology. This excess helium has an isotope...
Neural networks for river flow prediction
Nachimuthu Karunanithi, William J. Grenney, Darrell Whitley, Ken Bovee
1994, Journal of Computing in Civil Engineering (8) 201-203
The surface‐water hydrographs of rivers exhibit large variations due to many natural phenomena. One of the most commonly used approaches for interpolating and extending streamflow records is to fit observed data with an analytic power model. However, such analytic models may not adequately represent the flow process, because they are...
Hydrological controls on dissolved organic carbon during snowmelt in the Snake River near Montezuma, Colorado
G.M. Hornberger, Kenneth E. Bencala, D.M. McKnight
1994, Biogeochemistry (25) 147-165
A quantitative understanding of the factors controlling the variation of dissolved organic carbon (DOC) in headwater streams is of scientific concern for at least two reasons. First, quantifying the overall carbon budgets of lotic systems is needed for a fundamental understanding of these systems. Second, DOC interacts strongly with other...
Shoreline and coastal wetland variability along the west shore of Green Bay, Marinette and Oconto counties, Wisconsin
Gerald L. Shideler
1994, Miscellaneous Field Studies Map 2252
Coastal wetland ecosystems along the Great Lakes shorelines are extremely valuable natural resources. They provide numerous environmental and recreational benefits, and they serve as critical habitats for fish and wildlife populations. In general terms, wetlands can be defined as lands transitional between terrestrial and aquatic systems; they are characterized by...
Deuterium content of water from wells and perennial springs, southeastern California
J.D. Gleason, Guida Veronda, G.I. Smith, Irving Friedman, P. M. Martin
1994, Hydrologic Atlas 727
The areal distribution of the concentrations of the stable isotopes deuterium and oxygen-18 in ground water in southeastern California is depicted and evaluated in this report. The deuterium content of about 300 ground-water samples and the oxygen-18 content of 101 of these samples are presented. Thirty-two of the samples were...
Geologic map of science study area 4, Chasma Boreale Region of Mars
A. L. Dial Jr., J. M. Dohm
1994, IMAP 2357
This map is one is a series of 1:500,000 scale maps initiated by the National Aeronautics and Space Administration to investigate Science Study Areas (selected area of scientific interest) on Mars (fig. 1). The Chasma Boreale region merits detailed geologic study because it contains parts of (1) the north...