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Average annual precipitation and runoff for Arkansas, 1951-1980

Water-Resources Investigations Report 84-4363

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Abstract

Ten intercomparison studies to determine the accuracy of pH and specific-conductance measurements, using dilute-nitric acid solutions, were managed by the U.S. Geological Survey for the National Atmospheric Deposition Program and the National Trends Network precipitation networks. These precipitation networks set quality-control goals for site-operator measurements of pH and specific conductance. The accuracy goal for pH is plus or minus 0.1 pH unit; the accuracy goal for specific conductance is plus or minus 4 microsiemens per centimeter at 25 degrees Celsius. These intercomparison studies indicated that an average of 65 percent of the site-operator pH measurements and 79 percent of the site-operator specific-conductance measurements met the quality-control goal. A statistical approach that is resistant to outliers was used to evaluate and illustrate the results obtained from these intercomparisons. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Average annual precipitation and runoff for Arkansas, 1951-1980
Series title:
Water-Resources Investigations Report
Series number:
84-4363
Edition:
-
Year Published:
1984
Language:
ENGLISH
Description:
4 maps on 1 sheet ; 38 x 45 cm. and 10 x 12 cm., sheet 94 x 117 cm., folded in envelope 31 x 23 cm.