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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
Browse more than 5,500 book chapters authored by our scientists over the past 100+ year history of the USGS and refine search by topic, location, year, and advanced search.
Filter Total Items: 6158
Tundra swan research needs on the Upper Mississippi River Tundra swan research needs on the Upper Mississippi River
Abstract not submitted to date
Authors
K.P. Kenow, J.M. Nissen, R. Drieslein, E.M. Thorson
U.S. land cover and land use change—1973-2000 U.S. land cover and land use change—1973-2000
No abstract available.
Authors
D.E. Napton, Thomas R. Loveland
Natural remediation potential of arsenic-contaminated ground water Natural remediation potential of arsenic-contaminated ground water
Migration of leachate from a municipal landfill in Saco, Maine has resulted in arsenic concentrations in ground water as high as 647 μg/L. Laboratory experimental data indicate the primary source of arsenic to be reductive dissolution of arsenic-enriched iron oxyhydroxides in the aquifer by organic carbon in landfill leachate. A core from an uncontaminated part of the aquifer yielded no...
Authors
Kenneth G. Stollenwerk, John A. Colman
Arsenic in ground water used for drinking water in the United States Arsenic in ground water used for drinking water in the United States
The U.S. Environmental Protection Agency recently established a new maximum contaminant level of 10 micrograms per liter for arsenic in drinking water in the United States. Ground water is the primary source of drinking water for half the population of the United States. Several national assessments have found that high arsenic concentrations (above 10 micrograms per liter) are...
Authors
Sarah J. Ryker
Comparing groups using structural equations Comparing groups using structural equations
No abstract available.
Authors
James B. Grace
The seagrasses of the Gulf of Mexico The seagrasses of the Gulf of Mexico
The Gulf of Mexico is a vast basin of water, spanning 12° of latitude, from 18° to 30°N. and 17° of longitude, from 81° to 98°W. It is bisected by the Tropic of Cancer and is largely subtropical; however, along the northern edge, up to five days with freezing temperatures are probable on an annual basis. The coastal fringe is moist, with annual precipitation in excess of 1 000 mm, except...
Authors
C.P. Onuf, R. C. Phillips, C. A. Moncreiff, A. Raz-Guzman, Jorge A Herrera-Silveira
Seismology, observational Seismology, observational
No abstract available.
Authors
William H. K. Lee
Mountain glaciations of the Sierra Nevada Mountain glaciations of the Sierra Nevada
No abstract available.
Authors
Doug Clark, Alan R. Gillespie, Malcolm Clark, Bud Burke
The Rocky Mountain glacial model; the Wind River Range, Wyoming The Rocky Mountain glacial model; the Wind River Range, Wyoming
No abstract available.
Authors
D. E. Dahms, R. D. Hall, Ralph R. Shroba, C. J. Sorenson, E. A. Lynch, M. T. Applegarth
Hydraulic logging methods - A summary and field demonstration in Conyers, Rockdale County, Georgia Hydraulic logging methods - A summary and field demonstration in Conyers, Rockdale County, Georgia
Geophysical surveying techniques provide important information for ground-water investigations (Zohdy and others, 1974; Keys, 1997; Haeni and others, 2001). Subsurface-geophysical methods are used to delineate and characterize hydraulically active zones; the extent of contamination, and contaminant sources; identify geologic features; optimize monitoring well placement; and guide...
Authors
Carole D. Johnson, John Williams