Conversion Factors, Datums, and Abbreviations and Acronyms


Conversion Factors


Inch/Pound to SI


Multiply	By	To obtain
foot (ft)	0.3048	meter (m)
mile (mi)	1.609	kilometer (km)
acre-foot (acre-ft)	1,233	cubic meter (m3)
cubic foot per second (ft3/s)	0.02832	cubic meter per second (m3/s)
pound (lb)	0.45359	kilogram (kg)

SI to Inch/Pound


Multiply	By	To obtain
micrometer (µm)	0.00003937	inch (in.)
meter (m)	3.281	foot (ft)
square meter (m2)	1,550.0	square inch (in2)
liter (L)	33.82	ounce, fluid (fl. oz)
liter (L)	0.2642	gallon (gal)
cubic meter (m3)	264.2	gallon (gal)
liter (L)	61.02	cubic inch (in3)
cubic meter (m3)	35.31	cubic foot (ft3)
Watt (W)	3.41	British thermal unit per hour (BTU/h)

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), which is approximately equivalent to parts per million (ppm), or micrograms per liter (µg/L), which is approximately equivalent to parts per billion (ppb).


Datums


Elevation refers to distance above the vertical datum. A local vertical datum (UKLVD) is used, established by the Bureau of Reclamation. For the purpose of this report, the conversion is UKLVD – 1.78 ft = NGVD29.


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


Abbreviations and Acronyms


AFA	Aphanizomenon flos aquae
BOD	biochemical oxygen demand
BOD5	oxygen consumed over 5 days as a result of BOD
DOM	dissolved organic matter
GIS	geographic information system
>	greater than
ISS	inorganic suspended sediment
KR	Klamath River
LDOM	labile dissolved organic matter
LPOM	labile particulate organic matter
<	less than
NPDES	National Pollutant Discharge Elimination System
NH4	ammonia
NO3	nitrate
NTU	nephelometric turbidity units
NWIS	National Water Information System
ODEQ	Oregon Department of Environmental Quality
PDT	Pacific Daylight Time
POM	particulate organic matter
PO4	orthophosphorus
PST	Pacific Standard Time
RDOM	refractory dissolved organic matter
RPOM	refractory particulate organic matter
SC	specific conductance
SOD	sediment oxygen demand
T	water temperature
TMDL	total maximum daily load
TDS	total dissolved solids
TSS	total suspended solids
UKL	Upper Klamath Lake
USGS	U.S. Geological Survey
VSS	volatile suspended solids
WWTP	wastewater treatment plant

First posted July 14, 2011