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Search indexed USGS publications on groundwater, aquifers, geologic maps, mineral resources and earthquakes. Explore source records by subject and place.

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At least 1,459 records · Page 81Linked to original sources
USGS1978

Catalog of locations of U.S.G.S. instruments recording low-frequency data in California

During the past few years, the U.S. Geological Survey has installed many different types of instrumentation for the observation and detection of crustal deformation within the San Andreas fault system. In order to have an effective earthquake prediction program, it is important to have continuous data from these instruments collected at a central site. A second prerequisite is to provide adequate coverage throughout the large region of active faulting in this system.

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USGS1987

Water-quality assessment of the Carson River ground-water basin, Nevada and California; project description

In April 1986, the U.S. Geological Survey began a pilot program to assess the quality of the nation 's surface water and groundwater resources. This program, called the National Water-Quality Assessment (NAWQA) program, is designed to acquire and interpret information about a wide range of water quality issues. The program is in its early stages and consists of four surface water and three groundwater pilot projects. The objectives of the Carson River basin NAWQA project are described in the context of the national program, the study area and its associated water quality issues, and a proposed study approach. The objectives of the Carson River basin NAWQA project are to: (1) investigate regional groundwater quality; (2) describe relations of groundwater quality to land use, geohydrology, and other pertinent factors; (3) provide a general description of the location, nature and possible causes of selected widespread water quality problems in the project area; and (4) develop new techniques for characterizing regional groundwater quality, especially in arid alluvial basins. There are to be three major phases of the Carson River basin project. The first will consist of compilation and analysis of existing data. The second phase will consist of a regional water quality survey that will produce a consistent set of data that can be used to: (1) define regional quality of groundwater within the Carson River basin; and (2) compare that water quality with other aquifers in the Nation. The third phase will include topical studies that will define groundwater quality in the Carson River basin with respect to certain constituents, either basin wide or within specific areas of concern. (Lantz-PTT)

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