Scientific Investigations Report 2006-5005

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006-5005

Pesticides in Agricultural Irrigation-Return Flow, Columbia Basin Project, Washington, 2002-04

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Conversion Factors and Datums

Conversion Factors

Multiply By To obtain
acre 4,047 square meter
acre 0.001562 square mile
cubic foot per second (ft3/s) 0.02832 cubic meter per second
foot (ft) 0.3048 meter
inch (in.) 2.54 centimeter
liter (L) 33.82 ounce, fluid
mile (mi) 1.609 kilometer
pound, avoirdupois (lb) 0.4536 kilogram
square mile (mi2) 2.590 square kilometer

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) as follows:

°F=(1.8×°C)+32.

Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (μS/cm at 25 °C).

Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) or micrograms per liter (μg/L).

Datum

Horizontal coordinate information is referenced to the North American Datum of 1927 (NAD27) and North American Datum of 1983 (NAD83).

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For more information about USGS activities in Washington, visit the USGS Washington Water Science Center home page .

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