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Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of methylene blue active substances by spectrophotometry
Mark R. Burkhardt, Pete J. Cinotto, Galen W. Frahm, Mark T. Woodworth, Jeffrey W. Pritt
1995, Open-File Report 95-189
A method for the determination of methylene blue active substances in whole-water samples by liquid-liquid extraction and spectrophotometric detection is described. Sulfate and sulfonate-based surfectants are reacted with methylene blue to form a blue-colored complex. The complex is extracted into chloroform, back-washed with an acidified phosphate-based buffer solution,...
Water-resources investigations in Wisconsin, 1995
D. E. Maertz (compiler)
1995, Open-File Report 95-328
The statewide average precipitation of 30.66 inches for the 1994 water year was 96 percent of the normal annual precipitation of 31.79 inches for water years 1961-90. Average precipitation values ranged from 81 percent of normal in southeastern Wisconsin to 103 percent of normal in west-central Wisconsin (Pamela Naber Knox,...
Water-quality, discharge, and biologic data for streams and springs in the Highland Rim Escarpment of southeastern Bedford County, Tennessee
E. F. Hollyday, T.D. Byl
1995, Open-File Report 95-732
From November 1994 through April 1995, streams and springs in 9 drainage basins were observed and sampled at 176 sites to obtain information on environmental quality near the Quail Hollow landfill, Bedford County, Tennessee. Reconnaissance data were collected to establish a regional pattern. Water samples from 26 seepage sites were...
Watershed boundaries and digital elevation model of Oklahoma derived from 1:100,000-scale digital topographic maps
J. R. Cederstrand, A. H. Rea
1995, Open-File Report 95-727
This document provides a general description of the procedures used to develop the data sets included on this compact disc. This compact disc contains watershed boundaries for Oklahoma, a digital elevation model, and other data sets derived from the digital elevation model. The digital elevation model was produced using the...
Evaluation of nonpoint-source contamination, Wisconsin; selected streamwater-quality data, land-use and best-management practices inventory, and quality assurance and quality control, water year 1993
Steven R. Corsi, John F. Walker, D.J. Graczyk, S.R. Greb, D.W. Owens, K.F. Rappold
1995, Open-File Report 94-707-W
The objective of the watershed-management evaluation monitoring program in Wisconsin is to evaluate the effectiveness of the best-management practices (BMPs) for rural streams, urban streams, and urban storm sewers. This report is an annual summary of the data collected for the program and a report of the results from several...
Simulation of stage and the the hydrologic budget of Devils Lake, Sauk County, Wisconsin
J. T. Krohelski, W. G. Batten
1995, Open-File Report 94-348
Water clarity of Devils Lake, in the Driftless Area of southwestern Wisconsin, has been decreasing because of blue-green algal blooms. An understanding of the hydrology of Devils Lake is needed to develop a mitigation plan to reduce phosphorus input. A model was developed to test the current understanding of the...
Sampling design and procedures for fixed surface-water sites in the Georgia-Florida coastal plain study unit, 1993
H. H. Hatzell, E. T. Oaksford, C.E. Asbury
1995, Open-File Report 95-279
The implementation of design guidelines for the National Water-Quality Assessment (NAWQA) Program has resulted in the development of new sampling procedures and the modification of existing procedures commonly used in the Water Resources Division of the U.S. Geological Survey. The Georgia-Florida Coastal Plain (GAFL) study unit began the intensive data...