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Publication Extents

Not all publications have extents, not all extents are completely accurate
Declassified intelligence satellite photographs
Water Resources Division, U.S. Geological Survey
1998, Fact Sheet 090-96
Recently declassified photographs from spy satellites are an important addition to the record of the Earth?s land surface held by the U.S. Geological Survey (USGS). More than 800,000 high-resolution photos taken between 1959 through 1972 were made available by Executive Order of the President. The collection is held at the...
Explore the virtual side of earth science
Water Resources Division, U.S. Geological Survey
1998, Fact Sheet 106-98
Scientists have always struggled to find an appropriate technology that could represent three-dimensional (3-D) data, facilitate dynamic analysis, and encourage on-the-fly interactivity. In the recent past, scientific visualization has increased the scientist's ability to visualize information, but it has not provided the interactive environment necessary for rapidly changing the model...
U.S. Geological Survey and Microsoft Cooperative Research and Development Agreement: Geospatial Data Browsing and Retrieval Site on the World Wide Web
Water Resources Division, U.S. Geological Survey
1998, Fact Sheet 111-97
In May 1997, the U.S. Geological Survey (USGS) and the Microsoft Corporation of Redmond, Wash., entered into a cooperative research and development agreement (CRADA) to make vast amounts of geospatial data available to the general public through the Internet. The CRADA is a 36-month joint effort to develop a general,...
Water quality of selected effluent-dependent stream reaches in southern Arizona as indicated by concentrations of periphytic chlorophyll a and aquatic-invertebrate communities
Joseph B. Gebler
1998, Water-Resources Investigations Report 98-4199
Concentrations of chlorophyll a and indices computed for aquatic- invertebrate communities in two effluent-dependent stream reaches on the Santa Cruz River and one on the Salt River were compared to those in noneffluent-dependent streams to examine potential differences in water quality. Periphytic chlorophyll a from riffle habitats and aquatic-invertebrate communities...
Water resources data, Maryland and Delaware, water year 1997, volume 2. ground-water data
Michael J. Smigaj, Richard W. Saffer, Roger J. Starsoneck, Judith L. Tegeler
1998, Water Data Report MD-DE-97-2
The Water Resources Division of the U.S. Geological Survey, in cooperation with State agencies, obtains a large amount of data pertaining to the water resources of Maryland and Delaware each water year. These data, accumulated during many water years, constitute a valuable data base for developing an improved understanding of...
Geology, ground-water flow, and dissolved-solids concentrations in ground water along hydrogeologic sections through Wisconsin aquifers
P.A. Kammerer
1998, Hydrologic Atlas 731
A cooperative project between the U.S. Geological Survey (USGS) and the Wisconsin Department of Natural Resources (DNR) was begun with the objectives of describing water quality and its relation to the hydrology of Wisconsin's principal aquifers and summarizing instances of ground-water contamination and quality problems from information available in DNR...
Studies of the San Francisco Bay, California, estuarine ecosystem: Regional monitoring program results, 1997
Jelriza I. Baylosis, Brian E. Cole, James E. Cloern
1998, Open-File Report 98-168
As part of a regional monitoring program, water samples were collected in the San Francisco Bay estuary during 20 cruises from January through November 1997. Conductivity, temperature, light attenuation, turbidity, oxygen, and in-vivo chlorophyll fluorescence were measured longitudinally and vertically in the main channel of the estuary from south of...