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Page 489, results 12201 - 12225

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Data on the quantity and chemical quality of precipitation, Catoctin Mountain, north-central Maryland, 1982-91
Karen C. Rice, Margaret M. Kennedy, Owen P. Bricker, Colleen A. Donnelly
1993, Open-File Report 93-169
This report presents data on the quantity and chemical quality of precipitation collected by the U.S. Geological Survey (USGS) from the USGS precipitation-collection station at Catoctin Mountain, in Cunningham Falls State Park, near Thurmont, Maryland, from January 1982 through December 1991. Data on the quantity of precipitation are presented as...
Guidelines for the processing and quality assurance of benthic invertebrate samples collected as part of the National Water-Quality Assessment Program
T. F. Cuffney, M. E. Gurtz, M. R. Meador
1993, Open-File Report 93-407
Benthic invertebrate samples are collected as part of the U.S. Geological Survey's National Water-Quality Assessment Program. This is a perennial, multidisciplinary program that integrates biological, physical, and chemical indicators of water quality to evaluate status and trends and to develop an understanding of the factors controlling observed water quality. The...
Water-resources activities of the U.S. Geological Survey in Montana, October 1991 through September 1993
K. S. Midtlyng (compiler), C.J. Harksen
1993, Open-File Report 93-151
Water-resources programs and activities of the U.S. Geological Survey in Montana consist principally of hydrologic-data collection and investigative studies that address water-resource issues. The work is supported by direct Federal funding, by transfer of funds from other Federal agencies, and by joint funding agreements with State or local agencies. The...
Methods for characterizing stream habitat as part of the National Water-Quality Assessment Program
Michael R. Meador, Cliff R. Hupp, Thomas F. Cuffney, Martin E. Gurtz
1993, Open-File Report 93-408
Stream habitat is characterized in the U.S. Geological Survey's National Water-Quality Assessment Program as part of an integrated physical, chemical, and biological assessment of the Nation's water quality. The goal of stream habitat characterization is to relate habitat to other physical, chemical, and biological factors to describe water-quality conditions. To...
Earthquake locations determined by the Southern Alaska seismograph network for October 1971 through May 1989
Kent A. Fogleman, John C. Lahr, Christopher D. Stephens, Robert A. Page
1993, Open-File Report 93-309
This report describes the instrumentation and evolution of the U.S. Geological Survey’s regional seismograph network in southern Alaska, provides phase and hypocenter data for seismic events from October 1971 through May 1989, reviews the location methods used, and discusses the completeness of the catalog and the accuracy of the computed...
The Effect of mining and related activities on the sediment-trace element geochemistry of Lake Coeur d'Alene, Idaho, U.S.A.; Part II, Subsurface sediments
A. J. Horowitz, K. A. Elrick, J. A. Robbins, R.B. Cook
1993, Open-File Report 93-656
During the summer of 1990, 12 gravity cores were collected in Lake Coeur d'Alene, Idaho, at various depths and in a variety of depositional environments. All core subsamples were analyzed to determine bulk chemistry and selected subsamples were analyzed for trace-element partitioning and (137)Cs activity. The purpose of these analyses...