Average annual precipitation and runoff for Arkansas, 1951-1980
Water-Resources Investigations Report
84-4363
By: David A. Freiwald
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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)
| 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 |
| DOI | 10.3133/wri844363 |
| 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. |
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