U.S. Geological Survey Water-supply PaperU.S. Government Printing Office, 1989 - Water-supply |
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Common terms and phrases
1979 U.S. Environmental 1980 American Society 1983 Skougstad 95-Percent confidence interval ACCOUNTING UNIT ambient American Public Health ammonium aquifer AREA Atomic absorption spectrometry Atomic emission spectrometry automated Based CATALOGING UNITS chelation-extraction Colorado and Ohio Colorimetric concentrations and standard confidence interval constituents Creek basin determine dissolved oxygen dithiocarbamate DRAINAGE Environmental Protection Agency flux rates ground water Hydrologic Unit ICP methods inductively coupled plasma Interlaboratory precision LAKE LOWER maps MEAN CONCENTRATION methyl isobutyl ketone micrograms per liter milligrams MILLIGRAMS PER LITER nitrate nitrite plus nitrate nitrogen NUMBER OF LABORATORIES number of samples NUMBER SYMBOLS nutrient percent Phase phosphorus Public Health Association pyrrolidine recharge Reference Water Samples regional reported runoff SAMPLES DISTRIBUTED sediment Society for Testing SOUTH DAKOTA SQ.MI SRWS distributed standard deviations Standard Reference Water streamflow SUBREGION surface-water Testing and Materials TEXAS total values ATOMIC tritium U.S. Environmental Protection U.S. Geological Survey UPPER water-quality data water-quality data-collection