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U.S. Geological Survey Data Series 488

Data Used in Analyses of Trends, and Nutrient and Suspended-Sediment Loads for Streams in the Southeastern United States, 1973–2005

Conversion Factors

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SI to Inch/Pound

Multiply

By

To obtain
Length

centimeter (cm)

0.3937

inch (in.)

kilometer (km)

0.6214

mile (mi)
Area

square meter (m2)

0.0002471

acre

hectare (ha)

2.471

acre

square meter (m2)

10.76

square foot (ft2)

square kilometer (km2)

0.3861

square mile (mi2)

Volume

liter (L)

0.2642

gallon (gal)

cubic meter (m3)

264.2

gallon (gal)

Flow

cubic meter per second (m3/s)

70.07

acre-foot per day (acre-ft/d)

cubic meter per second (m3/s)

35.31

cubic foot per second (ft3/s)

Mass

kilogram (kg)

2.205

pound avoirdupois (lb)

metric ton per day

1.102

ton per day (ton/d)

Inch/Pound to SI

Multiply

By

To obtain
Flow

cubic foot per second (ft3/s)

0.02832

cubic meter per second (m3/s)
Mass

ton per square mile (mi2)

0.00035

kilogram per square meter (kg/m2)

 

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).

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).

 

Abbreviations and Acronyms

 
AMLE   Adjusted maximum likelihood estimator
HR   Hydrologic Region (a major watershed)
LOESS   Locally weighted scatterplot smoothing
LRL   Laboratory reporting level
MDL   Method detection level
MRL   Minimum reporting level
MVUE   Minimum variance unbiased estimator
NASQAN   National Stream Quality Accounting Network
NAWQA   National Water Quality Assessment Program
NHD   National Hydrography Dataset
NTU   Nephelometric turbidity unit
NWIS   National Water Information System (database)
NWQL   National Water-Quality Laboratory
RC   Re-censored (pertains to data)
STORET   Storage and Retrieval database
USEPA   U.S. Environmental Protection Agency
USGS   U.S. Geological Survey

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