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Page 146, results 3626 - 3650

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Publication Extents

Not all publications have extents, not all extents are completely accurate
Utah braces for the future
Michael N. Machette, William M. Brown
1995, Fact Sheet 166-95
Almost 75 percent of Utah's population lives near the Wasatch Fault. Earth scientists have shown that this fault has repeatedly experienced strong earthquakes of magnitude 7 or larger and will continue to do so in the future. Efforts to increase public awareness of earthquake hazards in Utah have resulted in...
Saving lives through better design standards
Mehmet Çelebi, Paul A. Spudich, Robert A. Page, Peter H. Stauffer
1995, Fact Sheet 176-95
Over the past 30 years, scientists have put together a more complete picture of how the ground shakes during earthquakes. They have learned that shaking near the source of earthquakes is far more severe than once thought and that soft ground shakes more strongly than hard rock.This knowledge has enabled...
Speeding earthquake disaster relief
Carl Mortensen, Carolyn Donlin, Robert A. Page, Peter Ward
1995, Fact Sheet 097-95
In coping with recent multibillion-dollar earthquake disasters, scientists and emergency managers have found new ways to speed and improve relief efforts. This progress is founded on the rapid availability of earthquake information from seismograph networks....
Reversal of declining ground-water levels in the Chicago area
Charles Avery
1995, Fact Sheet 222-95
Abundant water resources have been an important part of the economic development of the Chicago area for more than a century. The city of Chicago, Ill., and other lakefront towns have used Lake Michigan as a water supply. Where water from Lake Michigan was not available or a need for supplemental...
Pesticides in Streams in Central Nebraska
J. K. Stamer, Michael Wieczorek
1995, Fact Sheet 232-95
Contamination of surface and ground water from non-point sources is a national issue. Examples of nonpoint-source contaminants from agricultural activities are pesticides, which include fungicides, herbicides, and insecticides; sediment; nutrients (nitrogen and phosphorus); and fecal bacteria. Of these contaminants, pesticides receive the most attention because of the potential toxicity to...
Nutrients in the South Platte River, 1993-95
David W. Litke
1995, Fact Sheet 105-95
The U.S. Geological Survey (USGS), as part of its National Water-Quality Assessment (NAWQA) program has been collecting and analyzing water samples from streams in the South Platte River Basin in Colorado, Nebraska, and Wyoming to characterize the water-quality conditions within the basin. Nutrients (nitrogen and phosphorus compounds) have been a...
Mercury contamination of aquatic ecosystems
David P. Krabbenhoft, David A. Rickert
1995, Fact Sheet 216-95
Mercury has been well known as an environmental pollutant for several decades. As early as the 1950's it was established that emissions of mercury to the environment could have serious effects on human health. These early studies demonstrated that fish and other wildlife from various ecosystems commonly attain mercury levels...
USGS Tracks Acid Rain
John D. Gordon, Mark A. Nilles, LeRoy J. Schroder
1995, Fact Sheet 183-95
The U.S. Geological Survey (USGS) has been actively studying acid rain for the past 15 years. When scientists learned that acid rain could harm fish, fear of damage to our natural environment from acid rain concerned the American public. Research by USGS scientists and other groups began to show that...
USGS Laboratory Review Program Ensures Analytical Quality
David E. Erdmann
1995, Fact Sheet 187-95
The USGS operates a review program for laboratories that analyze samples for USGS environmental investigations. This program has been effective in providing QA feedback to laboratories while ensuring that analytical data are consistent, of satisfactory quality, and meet the data objectives of the investigation....
USGS reference materials
Water Resources Division, U.S. Geological Survey
1995, Fact Sheet 207-95
Every year in the United States, millions of measurements are made on the chemical composition of items that affect us on a daily basis. Determining the accuracy of these measurements is based on the analysis of appropriate reference materials whose composition was previously determined through rigorous testing. Today, reference materials...
Occurrence of pesticides in the White River, Indiana, 1991-95
Charles G. Crawford
1995, Fact Sheet 233-95
Pesticides (herbicides and insecticides) are used extensively in the White River Basin. Application of herbicides to corn and soybeans accounts for most of the use. The pesticides most frequently detected near the mouth of the White River during 1991-95 were the herbicides alachlor, atrazine, cyanazine, and metolachlor. The highest concentrations...