Conversion Factors, Datums, and Abbreviations and Acronyms

Inch/Pound to SI

Multiply	By	To obtain
Length
foot (ft)	0.3048	meter (m)
mile (mi)	1.609	kilometer (km)
Area
square mile (mi2)	2.590	square kilometer (km2)
Velocity
foot per second (ft/s)	0.3048	meter per second (m/s)
Flow rate
cubic foot per second (ft3/s)	0.02832	cubic meter per second (m3/s)
Mass
pound, avoirdupois (lb)	0.4536	kilogram (kg)
ton per day (ton/d)	0.9072	metric ton per day

SI to Inch/Pound

Multiply	By	To obtain
Length
centimeter (cm)	0.3937	inch (in.)
millimeter (mm)	0.03937	inch (in.)
meter (m)	3.281	foot (ft)
kilometer (km)	0.6214	mile (mi)
Area
square meter (m2)	10.76	square foot (ft2)
Mass
gram (g)	0.03527	ounce, avoirdupois (oz)
milligram (mg)	0.00003527	ounce, avoirdupois (oz)

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

°F=(1.8×°C)+32.

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

°C=(°F-32)/1.8.

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

Periphyton biomass results are given in milligrams per square meter (mg/m²) for chlorophyll a and grams per square meter (g/m²) for ash-free dry mass.

Periphyton accumulation rates are given in milligrams per square meter per day (mg/m²-day) for chlorophyll a.

Water column planktonic chlorophyll a results are given in micrograms per liter (µg/L).

Datums

Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).

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

Elevation, as used in this report, refers to distance above the vertical datum.

Abbreviations and Acronyms

AFDM	ash-free dry mass
ANOVA	analysis of variance
Chl a	Chlorophyll a
C6H12O6	glucose
CO2	carbon dioxide
d	day
DIN	dissolved nitrite plus nitrate and dissolved ammonia
FNU	Formazin Nephelometric Unit
GF/F	glass fiber filters
GPP	gross primary productivity
H2O	water
N	nitrogen
NDS	nutrient-diffusing substrate
NTU	Nephelometric Turbidity Unit
NO3-N	nitrate nitrogen
O2	gaseous oxygen
P	phosphorus
PAR	photosynthetically active radiation
PO4-P	phosphate phosphorus
QC	quality control
RM	river mile
SRP	soluble reactive phosphorus
TKN	total Kjeldahl nitrogen
TMDL	total maximum daily load
USEPA	U.S. Environmental Protection Agency
USGS	U.S. Geological Survey
WA DOE	Washington Department of Ecology
Zc	maximum depth of macrophyte colonization