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Page 483, results 12051 - 12075

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Sensitivity of water resources in the Delaware River basin to climate variability and change
Mark A. Ayers, David M. Wolock, Gregory J. McCabe, Lauren E. Hay, Gary D. Tasker
1993, Open-File Report 92-52
Because of the "greenhouse effect," projected increases in atmospheric carbon dioxide levels might cause global warming, which in turn could result in changes in precipitation patterns and evapotranspiration and in increases in sea level. This report describes the greenhouse effect; discusses the problems and uncertainties associated with the detection, prediction,...
Methods for collecting algal samples as part of the National Water-Quality Assessment Program
Stephen D. Porter, Thomas F. Cuffney, Martin E. Gurtz, Michael R. Meador
1993, Open-File Report 93-409
Benthic algae (periphyton) and phytoplankton communities are 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. This multidisciplinary approach provides multiple lines of evidence for evaluating water-quality status and trends, and for refining an...
A response to "Milankovitch theory viewed from Devils Hole" by J. Imbrie, A.C. Mix and D.G. Martinson
I.J. Winograd, J.M. Landwehr
1993, Open-File Report 93-357
The detailed and well-dated 500,000-yr record of oxygen-18 variations found in vein calcite core DH-11 taken from Devils Hole in Nevada provides several challenges to the Milankovitch theory for the occurrence of Quaternary glaciations. A recent discussion paper (Imbrie and others, 1993) has dismissed the relevance of this well-dated core...
Quality assurance plan for the collection and processing of sediment data by the U.S. Geological Survey, Water Resources Division
J. M. Knott, G.D. Glysson, B.A. Malo, L.J. Schroeder
1993, Open-File Report 92-499
The U.S. Geological Survey sediment data quality assurance plan identifies and explains required quality assurance and suggested quality control practices. The approach is to subdivide the process for obtaining sediment data into 3 parts: (1) field, (2) office, and (3) laboratory operations. The report also summarizes recommended goals for each...
Surface-water-quality assessment of the Yakima River basin in Washington: Analysis of major and minor elements in fine-grained streambed sediment, 1987
G. J. Fuhrer, S. W. McKenzie, J. F. Rinella, R. F. Sanzolone, K. A. Skach
1993, Open-File Report 93-30
Fine-grained streambed sediment from the Yakima River Basin was sampled from 448 locations and analyzed for 45 elements. Anomalous major- and minor-element concentrations were based on baseline values established from element concentrations in streambed sediment in the basin. The largest number of anomalies occurred for antimony, arsenic, cerium, copper,...